cph_deca_msg_header_t * cph_deca_read_frame(uint8_t * rx_buffer, uint32_t *frame_len) {
/* Clear good RX frame event in the DW1000 status register. */
dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_RXFCG);
/* A frame has been received, read it into the local buffer. */
*frame_len = dwt_read32bitreg(RX_FINFO_ID) & RX_FINFO_RXFL_MASK_1023;
if (*frame_len <= CPH_MAX_MSG_SIZE) {
dwt_readrxdata(rx_buffer, *frame_len, 0);
#if defined(DEBUG_PRINT_RXFRAME)
printf("FRM: ");
for (int i=0;i<*frame_len;i++)
printf("%02X ", rx_buffer[i]);
printf("\r\n");
#endif
return (cph_deca_msg_header_t*)rx_buffer;
}
else {
TRACE("Bad length: %04X\r\n", *frame_len);
return 0;
}
}
uint32_t cph_deca_wait_for_rx_finished_signal(int timeout_ms, volatile uint8_t * signal) {
uint32_t status_reg;
uint32_t start_ms = cph_get_millis();
uint32_t elapsed = 0;
while (cph_deca_isr_is_detected() == false) {
if (*signal == 0xFF)
return 0;
elapsed = cph_get_millis() - start_ms;
if (elapsed > timeout_ms)
return 0;
}
status_reg = dwt_read32bitreg(SYS_STATUS_ID);
return status_reg;
}
void toSendMsg1(uint8 niz[], int size){
uint8 niz1[size];
int rx_id;
uint8 transmission_delay;
memset(dataseq2,0,sizeof(dataseq1));
sprintf((char*)&dataseq2[0],"%lx %lx send",
niz1[1],niz1[2]);//,niz1[2],sizeof(niz1), size);
writetoLCD(1, 0, 0x2);
writetoLCD(40,1,dataseq2);
memset(dataseq2,0,sizeof(dataseq2));
rx_id=niz[2];
if(rx_id==1){
for (int i=0;i<size;i++){
niz1[i]=niz[i];
}
niz1[1]=rx_seq_num;
niz1[2]=3; // ID of the end node/ second one in the line.
/* Write frame data to DW1000 and prepare transmission. See NOTE 3 below.*/
dwt_writetxdata(size, niz1, 0);
dwt_writetxfctrl(size, 0);
/* Start transmission. */
dwt_starttx(DWT_START_TX_IMMEDIATE);
/* Poll DW1000 until TX frame sent event set. See NOTE 4 below.
* STATUS register is 5 bytes long but, as the event we are looking at is in the first byte of the register, we can use this simplest API
* function to access it.*/
while (!(dwt_read32bitreg(SYS_STATUS_ID) & SYS_STATUS_TXFRS))
{ };
/* Clear TX frame sent event. */
dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_TXFRS);
/* Execute a delay between transmissions. */
deca_sleep(TX_DELAY_MS);
/* Increment the blink frame sequence number (modulo 256). */
rx_seq_num++;
}
}
cph_deca_msg_header_t * cph_deca_read_frame(uint8_t * rx_buffer, uint32_t *frame_len) {
/* Clear good RX frame event in the DW1000 status register. */
dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_RXFCG);
/* A frame has been received, read it into the local buffer. */
*frame_len = dwt_read32bitreg(RX_FINFO_ID) & RX_FINFO_RXFL_MASK_1023;
if (*frame_len <= CPH_MAX_MSG_SIZE) {
dwt_readrxdata(rx_buffer, *frame_len, 0);
return (cph_deca_msg_header_t*)rx_buffer;
}
else {
return 0;
}
}
static void print_status(void) {
uint32 status = 0;
uint32 status1 = 0;
status = dwt_read32bitreg(SYS_STATUS_ID);
status1 = dwt_read32bitoffsetreg(SYS_STATUS_ID, 1); // read status register
dwt_readfromdevice(RX_BUFFER_ID, 0, 2, buffer);
printf("MAIN status %02X %08X, byte 0 %02X%02X\r\n", status1 >> 24, status, buffer[0], buffer[1]);
memset(buffer, 0xaa, FS_CTRL_LEN);
dwt_readfromdevice(FS_CTRL_ID, 0, FS_CTRL_LEN, buffer);
printf("FS_PLLCFG %08X FS_PLLTUNE %02X FS_XTALT %02X\r\n", *((uint32_t*) &buffer[0x07]), (uint8_t) (buffer[0x0b]),
(uint8_t) (buffer[0x0e]));
status = dwt_read32bitoffsetreg(RF_CONF_ID, RF_STATUS_OFFSET);
printf("RF_STATUS %08X\r\n\r\n", status);
}
void toSendMsg(uint8 niz[], int size){ // for relaing node, that does not change anything
uint8 niz1[size];
int rx_id;
uint8 transmission_delay;
memset(dataseq2,0,sizeof(dataseq1));
sprintf((char*)&dataseq2[0],"%lx send",
niz1[2]);//,niz1[2],sizeof(niz1), size);
writetoLCD(1, 0, 0x2);
writetoLCD(40,1,dataseq2);
memset(dataseq2,0,sizeof(dataseq2));
rx_id=niz[2];
for (int i=0;i<size;i++){
niz1[i]=niz[i];
}
/* Write frame data to DW1000 and prepare transmission. See NOTE 3 below.*/
dwt_writetxdata(size, niz1, 0);
dwt_writetxfctrl(size, 0);
/* Start transmission. */
dwt_starttx(DWT_START_TX_IMMEDIATE);
/* Poll DW1000 until TX frame sent event set. See NOTE 4 below.
* STATUS register is 5 bytes long but, as the event we are looking at is in the first byte of the register, we can use this simplest API
* function to access it.*/
while (!(dwt_read32bitreg(SYS_STATUS_ID) & SYS_STATUS_TXFRS))
{ };
/* Clear TX frame sent event. */
dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_TXFRS);
/* Execute a delay between transmissions. */
deca_sleep(TX_DELAY_MS);
}
/**
* Application entry point.
*/
int simpleTx(void)
{
/* Reset and initialise DW1000.
* For initialisation, DW1000 clocks must be temporarily set to crystal speed. After initialisation SPI rate can be increased for optimum
* performance. */
reset_DW1000(); /* Target specific drive of RSTn line into DW1000 low for a period. */
//spi_set_rate_low();
dwt_initialise(DWT_LOADNONE);
//spi_set_rate_high();
/* Configure DW1000. See NOTE 2 below. */
dwt_configure(&config);
/* Loop forever sending frames periodically. */
while(1)
{
/* Write frame data to DW1000 and prepare transmission. See NOTE 3 below.*/
dwt_writetxdata(sizeof(tx_msg), tx_msg, 0);
dwt_writetxfctrl(sizeof(tx_msg), 0);
/* Start transmission. */
dwt_starttx(DWT_START_TX_IMMEDIATE);
/* Poll DW1000 until TX frame sent event set. See NOTE 4 below.
* STATUS register is 5 bytes long but, as the event we are looking at is in the first byte of the register, we can use this simplest API
* function to access it.*/
while (!(status_reg = dwt_read32bitreg(SYS_STATUS_ID) & SYS_STATUS_TXFRS))
{ };
printf("Status reg now 0x%x\r\n",status_reg);
/* Clear TX frame sent event. */
dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_TXFRS);
/* Execute a delay between transmissions. */
deca_sleep(TX_DELAY_MS);
// toggle led
ledToggle();
/* Increment the blink frame sequence number (modulo 256). */
tx_msg[BLINK_FRAME_SN_IDX]++;
}
}
bool DWM1000_Anchor::dispatch(Msg& msg) {
PT_BEGIN()
PT_WAIT_UNTIL(msg.is(0, SIG_INIT));
init();
while (true) {
WAIT_POLL: {
dwt_setrxtimeout(0); /* Clear reception timeout to start next ranging process. */
dwt_rxenable(0); /* Activate reception immediately. */
// dwt_setinterrupt(DWT_INT_RFCG, 1); // enable RXD interrupt
while (true) { /* Poll for reception of a frame or error/timeout. See NOTE 7 below. */
timeout(1000);/* This is the delay from the end of the frame transmission to the enable of the receiver, as programmed for the DW1000's wait for response feature. */
clearInterrupt();
PT_YIELD_UNTIL(timeout() || isInterruptDetected());
status_reg = _status_reg;
LOG<< HEX << " status reg.:" << status_reg << " ,interrupts : " << interruptCount << FLUSH;
status_reg = dwt_read32bitreg(SYS_STATUS_ID);
LOG<< HEX << " IRQ pin : " << digitalRead(D2) << " status_reg DWM1000 " << status_reg << FLUSH;// PULL LOW
if (status_reg & (SYS_STATUS_RXFCG | SYS_STATUS_ALL_RX_ERR))
break;
}
}
///____________________________________________________________________________
if (status_reg & SYS_STATUS_RXFCG) {
LOG<< " $ "<<FLUSH;
uint32 frame_len;
dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_RXFCG); /* Clear good RX frame event in the DW1000 status register. */
/* A frame has been received, read it into the local buffer. */
frame_len = dwt_read32bitreg(RX_FINFO_ID) & RX_FINFO_RXFL_MASK_1023;
if (frame_len <= RX_BUFFER_LEN) {
dwt_readrxdata(rx_buffer, frame_len, 0);
}
/* Check that the frame is a poll sent by "DS TWR initiator" example.
* As the sequence number field of the frame is not relevant, it is cleared to simplify the validation of the frame. */
rx_buffer[ALL_MSG_SN_IDX] = 0;
if (memcmp(rx_buffer, rx_poll_msg, ALL_MSG_COMMON_LEN) == 0) {
LOG<< " $$ "<<FLUSH;
uint32 resp_tx_time;
poll_rx_ts = get_rx_timestamp_u64(); /* Retrieve poll reception timestamp. */
/* Set send time for response. See NOTE 8 below. */
resp_tx_time = (poll_rx_ts
+ (POLL_RX_TO_RESP_TX_DLY_UUS * UUS_TO_DWT_TIME)) >> 8;
dwt_setdelayedtrxtime(resp_tx_time);
/* Set expected delay and timeout for final message reception. */
dwt_setrxaftertxdelay(RESP_TX_TO_FINAL_RX_DLY_UUS);
dwt_setrxtimeout(FINAL_RX_TIMEOUT_UUS);
/* Write and send the response message. See NOTE 9 below.*/
tx_resp_msg[ALL_MSG_SN_IDX] = frame_seq_nb;
dwt_writetxdata(sizeof(tx_resp_msg), tx_resp_msg, 0);
dwt_writetxfctrl(sizeof(tx_resp_msg), 0);
dwt_starttx(DWT_START_TX_DELAYED | DWT_RESPONSE_EXPECTED);
/* We assume that the transmission is achieved correctly, now poll for reception of expected "final" frame or error/timeout.
* See NOTE 7 below. */
// while (true) { /* Poll for reception of a frame or error/timeout. See NOTE 7 below. */
timeout(10);
dwt_setinterrupt(DWT_INT_RFCG, 1);// enable
clearInterrupt();
// PT_YIELD_UNTIL(timeout() || isInterruptDetected());
status_reg = dwt_read32bitreg(SYS_STATUS_ID);
// status_reg = _status_reg;
LOG<< HEX << " status reg2:" << status_reg << FLUSH;
// if (status_reg & (SYS_STATUS_RXFCG | SYS_STATUS_ALL_RX_ERR))
// break;
// }
// while (!((status_reg = dwt_read32bitreg(SYS_STATUS_ID)) & (SYS_STATUS_RXFCG | SYS_STATUS_ALL_RX_ERR)))
// { };
/* Increment frame sequence number after transmission of the response message (modulo 256). */
frame_seq_nb++;
if (status_reg & SYS_STATUS_RXFCG) {
LOG<< " $$$ "<<FLUSH;
/* Clear good RX frame event and TX frame sent in the DW1000 status register. */
dwt_write32bitreg(SYS_STATUS_ID,
SYS_STATUS_RXFCG | SYS_STATUS_TXFRS);
/* A frame has been received, read it into the local buffer. */
frame_len = dwt_read32bitreg(
RX_FINFO_ID) & RX_FINFO_RXFLEN_MASK;
if (frame_len <= RX_BUF_LEN) {
dwt_readrxdata(rx_buffer, frame_len, 0);
}
/* Check that the frame is a final message sent by "DS TWR initiator" example.
* As the sequence number field of the frame is not used in this example, it can be zeroed to ease the validation of the frame. */
rx_buffer[ALL_MSG_SN_IDX] = 0;
if (memcmp(rx_buffer, rx_final_msg, ALL_MSG_COMMON_LEN)
== 0) {
uint32 poll_tx_ts, resp_rx_ts, final_tx_ts;
uint32 poll_rx_ts_32, resp_tx_ts_32, final_rx_ts_32;
double Ra, Rb, Da, Db;
int64 tof_dtu;
/* Retrieve response transmission and final reception timestamps. */
resp_tx_ts = get_tx_timestamp_u64();
final_rx_ts = get_rx_timestamp_u64();
/* Get timestamps embedded in the final message. */
final_msg_get_ts(&rx_buffer[FINAL_MSG_POLL_TX_TS_IDX],
&poll_tx_ts);
final_msg_get_ts(&rx_buffer[FINAL_MSG_RESP_RX_TS_IDX],
&resp_rx_ts);
final_msg_get_ts(&rx_buffer[FINAL_MSG_FINAL_TX_TS_IDX],
&final_tx_ts);
/* Compute time of flight. 32-bit subtractions give correct answers even if clock has wrapped. See NOTE 10 below. */
poll_rx_ts_32 = (uint32) poll_rx_ts;
resp_tx_ts_32 = (uint32) resp_tx_ts;
final_rx_ts_32 = (uint32) final_rx_ts;
Ra = (double) (resp_rx_ts - poll_tx_ts);
Rb = (double) (final_rx_ts_32 - resp_tx_ts_32);
Da = (double) (final_tx_ts - resp_rx_ts);
Db = (double) (resp_tx_ts_32 - poll_rx_ts_32);
tof_dtu = (int64) ((Ra * Rb - Da * Db)
/ (Ra + Rb + Da + Db));
tof = tof_dtu * DWT_TIME_UNITS;
distance = tof * SPEED_OF_LIGHT;
/* Display computed distance on LCD. */
// char dist_str[20];
// sprintf(dist_str,"%3.2f", distance);
// lcd_display_str(dist_str);
LOG<< " distance : " << (float)distance << "m. " << FLUSH;
}
} else {
/* Clear RX error events in the DW1000 status register. */
dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_ALL_RX_ERR);
}
}
} else {
IRAM void DWM1000_Anchor::my_dwt_isr() {
interrupt_detected = true;
_status_reg = dwt_read32bitreg(SYS_STATUS_ID);
dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_ALL_RX_ERR | SYS_STATUS_RXFCG);
interruptCount++;
}
// -------------------------------------------------------------------------------------------------------------------
//
// the main instance state machine (for Tag instance mode only!)
//
// -------------------------------------------------------------------------------------------------------------------
//
int testapprun_tf(instance_data_t *inst, int message)
{
switch (inst->testAppState)
{
case TA_INIT :
// printf("TA_INIT") ;
switch (inst->mode)
{
case TAG:
{
int mode = 0;
dwt_enableframefilter(DWT_FF_DATA_EN | DWT_FF_ACK_EN); //allow data and ack frames;
inst->frameFilteringEnabled = 1 ;
dwt_setpanid(inst->panid);
dwt_seteui(inst->eui64);
inst->msg_f.panID[0] = (inst->panid) & 0xff;
inst->msg_f.panID[1] = inst->panid >> 8;
#if (DR_DISCOVERY == 1)
inst->mode = TAG_TDOA ;
inst->testAppState = TA_TXBLINK_WAIT_SEND;
memcpy(&inst->blinkmsg.tagID[0], &inst->eui64[0], BLINK_FRAME_SOURCE_ADDRESS);
#else
inst->testAppState = TA_TXPOLL_WAIT_SEND;
#endif
//can use RX auto re-enable when not logging/plotting errored frames
inst->rxautoreenable = 1;
dwt_setautorxreenable(inst->rxautoreenable); //not necessary to auto RX re-enable as the receiver is on for a short time (Tag knows when the response is coming)
//disable double buffer for a Tag - not needed....
dwt_setdblrxbuffmode(0); //enable/disable double RX buffer
//NOTE - Auto ACK only works if frame filtering is enabled!
dwt_enableautoack(ACK_RESPONSE_TIME); //wait for ACK_RESPONSE_TIME symbols (e.g. 5) before replying with the ACK
mode = (DWT_LOADUCODE|DWT_PRESRV_SLEEP|DWT_CONFIG|DWT_TANDV);
if((dwt_getldotune() != 0)) //if we need to use LDO tune value from OTP kick it after sleep
mode |= DWT_LOADLDO;
if(inst->configData.txPreambLength == DWT_PLEN_64) //if using 64 length preamble then use the corresponding OPSet
mode |= DWT_LOADOPSET;
//NOTE: on the EVK1000 the DEEPSLEEP is not actually putting the DW1000 into full DEEPSLEEP mode as XTAL is kept on
dwt_configuresleep(mode, DWT_WAKE_CS|DWT_SLP_EN); //configure the on wake parameters (upload the IC config settings)
}
break;
default:
break;
}
break; // end case TA_INIT
case TA_SLEEP_DONE :
{
event_data_t* dw_event = instance_getevent(20); //clear the event from the queue
// waiting for timout from application to wakup IC
if (dw_event->type != DWT_SIG_RX_TIMEOUT)
{
inst->done = INST_DONE_WAIT_FOR_NEXT_EVENT; //wait here for sleep timeout
break;
}
inst->done = INST_NOT_DONE_YET;
inst->instToSleep = 0;
inst->testAppState = inst->nextState;
inst->nextState = 0; //clear
inst->canprintinfo = 0;
//wake up from DEEP SLEEP
{
//wake up device from low power mode
//NOTE - in the ARM code just drop chip select for 200us
port_SPIx_clear_chip_select(); //CS low
instance_data[0].dwIDLE = 0; //reset
setup_DW1000RSTnIRQ(1); //enable RSTn IRQ
Sleep(1); //200 us to wake up then waits 5ms for DW1000 XTAL to stabilise
port_SPIx_set_chip_select(); //CS high
#if (DW_IDLE_CHK==1) //Wait (sleep) to give DW1000 time to get to IDLE state
Sleep(5);
//this is platform dependent - only program if DW EVK/EVB
dwt_setleds(1);
//MP bug - TX antenna delay needs reprogramming as it is not preserved
dwt_settxantennadelay(inst->txantennaDelay) ;
//set EUI as it will not be preserved unless the EUI is programmed and loaded from NVM
/*if((inst->mode == TAG) || (inst->mode == TAG_TDOA))
{
dwt_setpanid(inst->panid);
dwt_seteui(inst->eui64);
}*/
#elif (DW_IDLE_CHK==2) //Use RSTn pin to notify the micro that DW1000 is in IDLE
//need to poll to check when the DW1000 is in IDLE, the CPLL interrupt is not reliable
while(instance_data[0].dwIDLE == 0); //wait for DW1000 to go to IDLE state RSTn pin to go high
if(dwt_read32bitreg(0x0) != 0xDECA0130)
{
//error?
int x = 0;
}
setup_DW1000RSTnIRQ(0); //disable RSTn IRQ
#else
//need to poll to check when the DW1000 is in IDLE, the CPLL interrupt is not reliable
while(dwt_read32bitreg(0x0) != 0xDECA0130);
//Sleep(2);
#endif
dwt_entersleepaftertx(0);
dwt_setinterrupt(DWT_INT_TFRS, 1); //re-enable the TX/RX interrupts
}
}
break;
case TA_TXE_WAIT : //either go to sleep or proceed to TX a message
// printf("TA_TXE_WAIT") ;
//if we are scheduled to go to sleep before next sending then sleep first.
if(((inst->nextState == TA_TXPOLL_WAIT_SEND)
|| (inst->nextState == TA_TXBLINK_WAIT_SEND))
&& (inst->instToSleep) //go to sleep before sending the next poll
)
{
//the app should put chip into low power state and wake up in tagSleepTime_ms time...
//the app could go to *_IDLE state and wait for uP to wake it up...
inst->done = INST_DONE_WAIT_FOR_NEXT_EVENT_TO; //don't sleep here but kick off the TagTimeoutTimer (instancetimer)
inst->testAppState = TA_SLEEP_DONE;
if(inst->nextState == TA_TXBLINK_WAIT_SEND)
inst->canprintinfo = 1;
//put device into low power mode
dwt_entersleep(); //go to sleep
}
else //proceed to configuration and transmission of a frame
{
inst->testAppState = inst->nextState;
inst->nextState = 0; //clear
}
break ; // end case TA_TXE_WAIT
case TA_TXBLINK_WAIT_SEND :
{
//blink frames with IEEE EUI-64 tag ID
inst->blinkmsg.frameCtrl = 0xC5 ;
inst->blinkmsg.seqNum = inst->frame_sn++;
dwt_writetxdata((BLINK_FRAME_CRTL_AND_ADDRESS + FRAME_CRC), (uint8 *) (&inst->blinkmsg), 0) ; // write the frame data
dwt_writetxfctrl((BLINK_FRAME_CRTL_AND_ADDRESS + FRAME_CRC), 0);
//response will be sent after 500us (thus delay the receiver turn on by 290sym ~ 299us)
//use delayed rx on (wait4resp timer) - this value is applied when the TX frame is done/sent, so this value can be written after TX is started
dwt_setrxaftertxdelay(inst->rnginitW4Rdelay_sy); //units are ~us - wait for wait4respTIM before RX on (delay RX)
dwt_starttx(DWT_START_TX_IMMEDIATE | DWT_RESPONSE_EXPECTED); //always using immediate TX
dwt_setrxtimeout(inst->fwtoTimeB_sy); //units are us - wait for BLINKRX_FWTO_TIME after RX on before timing out
#if (DW_IDLE_CHK==2)
//this is platform dependent - only program if DW EVK/EVB
dwt_setleds(1);
//MP bug - TX antenna delay needs reprogramming as it is not preserved
dwt_settxantennadelay(inst->txantennaDelay) ;
#endif
inst->sentSN = inst->blinkmsg.seqNum;
inst->wait4ack = DWT_RESPONSE_EXPECTED; //Poll is coming soon after...
inst->instToSleep = 1;
inst->testAppState = TA_TX_WAIT_CONF ; // wait confirmation
inst->previousState = TA_TXBLINK_WAIT_SEND ;
inst->done = INST_DONE_WAIT_FOR_NEXT_EVENT; //will use RX FWTO to time out (set below)
}
break ; // end case TA_TXBLINK_WAIT_SEND
case TA_TXPOLL_WAIT_SEND :
{
#if (DR_DISCOVERY == 1)
//NOTE the anchor address is set after receiving the ranging initialisation message
inst->instToSleep = 1; //go to Sleep after this poll
#else
//set destination address
if(destaddress(inst))
{
break;
}
//copy anchor address to short message structure
inst->msg_f.destAddr[0] = inst->msg.destAddr[0];
inst->msg_f.destAddr[1] = inst->msg.destAddr[1];
#endif
inst->msg_f.messageData[FCODE] = RTLS_DEMO_MSG_TAG_POLLF;
inst->psduLength = TAG_POLL_F_MSG_LEN + FRAME_CRTL_AND_ADDRESS_S + FRAME_CRC + EXTRA_LENGTH;
//set frame type (0-2), SEC (3), Pending (4), ACK (5), PanIDcomp(6)
inst->msg_f.frameCtrl[0] = 0x41 /*PID comp*/;
//short address for both
inst->msg_f.frameCtrl[1] = 0x8 /*dest short address (16bits)*/ | 0x80 /*src short address (16bits)*/;
inst->msg_f.seqNum = inst->frame_sn++;
inst->wait4ack = DWT_RESPONSE_EXPECTED; //Response is coming after 275 us...
//500 -> 485, 800 -> 765
dwt_writetxfctrl(inst->psduLength, 0);
//if the response is expected there is a 1ms timeout to stop RX if no response (ACK or other frame) coming
dwt_setrxtimeout(inst->fwtoTime_sy); //units are us - wait for 215us after RX on
//use delayed rx on (wait4resp timer)
dwt_setrxaftertxdelay(inst->fixedReplyDelay_sy); //units are ~us - wait for wait4respTIM before RX on (delay RX)
dwt_writetxdata(inst->psduLength, (uint8 *) &inst->msg_f, 0) ; // write the poll frame data
//start TX of frame
dwt_starttx(DWT_START_TX_IMMEDIATE | inst->wait4ack);
#if (DW_IDLE_CHK==2)
//this is platform dependent - only program if DW EVK/EVB
dwt_setleds(1);
//MP bug - TX antenna delay needs reprogramming as it is not preserved
dwt_settxantennadelay(inst->txantennaDelay) ;
#endif
inst->sentSN = inst->msg_f.seqNum;
//write the final function code
inst->msg_f.messageData[FCODE] = RTLS_DEMO_MSG_TAG_FINALF;
//increment the sequence number for the final message
inst->msg_f.seqNum = inst->frame_sn;
inst->testAppState = TA_TX_WAIT_CONF ; // wait confirmation
inst->previousState = TA_TXPOLL_WAIT_SEND ;
inst->done = INST_DONE_WAIT_FOR_NEXT_EVENT; //will use RX FWTO to time out (set below)
inst->responseRxNum = 0;
}
break;
case TA_TX_WAIT_CONF :
//printf("TA_TX_WAIT_CONF") ;
{
//uint8 temp[5];
event_data_t* dw_event = instance_getevent(5); //get and clear this event
//NOTE: Can get the ACK before the TX confirm event for the frame requesting the ACK
//this happens because if polling the ISR the RX event will be processed 1st and then the TX event
//thus the reception of the ACK will be processed before the TX confirmation of the frame that requested it.
if(dw_event->type != DWT_SIG_TX_DONE) //wait for TX done confirmation
{
if(dw_event->type == DWT_SIG_RX_TIMEOUT) //got RX timeout - i.e. did not get the response (e.g. ACK)
{
//we need to wait for SIG_TX_DONE and then process the timeout and re-send the frame if needed
inst->gotTO = 1;
}
if(dw_event->type == SIG_RX_ACK)
{
inst->wait4ack = 0 ; //clear the flag as the ACK has been received
inst_processackmsg(inst, dw_event->msgu.rxackmsg.seqNum);
//printf("RX ACK in TA_TX_WAIT_CONF... wait for TX confirm before changing state\n");
}
inst->done = INST_DONE_WAIT_FOR_NEXT_EVENT;
break;
}
inst->done = INST_NOT_DONE_YET;
if(inst->previousState == TA_TXFINAL_WAIT_SEND) //tag will do immediate receive when waiting for report (as anchor sends it without delay)
{
#if (DR_DISCOVERY == 1)
//in Discovery mode anchor is not sending the report to tag go to sleep
inst->done = INST_DONE_WAIT_FOR_NEXT_EVENT_TO; //kick off the TagTimeoutTimer (instance timer) to initiate wakeup
inst->nextState = TA_TXPOLL_WAIT_SEND;
inst->testAppState = TA_TXE_WAIT; //we are going manually to sleep - change to TA_TXE_WAIT state
#else
//wait for report when non-Discovery mode
if(inst->wait4ack == 0)
dwt_rxenable(0) ; // turn receiver on,
#endif
break;
}
else if (inst->gotTO) //timeout
{
inst_processrxtimeout(inst);
inst->gotTO = 0;
}
else
{
if(inst->previousState == TA_TXPOLL_WAIT_SEND)
{
// write the final's frame control and address tx data (add CRC as the function will write length - 2)
dwt_writetxdata((FRAME_CRTL_AND_ADDRESS_S + 1 + FRAME_CRC), (uint8 *) &inst->msg_f, FINAL_MSG_OFFSET) ; // write the final frame data
dwt_entersleepaftertx(1);
dwt_setinterrupt(DWT_INT_TFRS, 0); //disable all the interrupts (wont be able to enter sleep if interrupts are pending)
inst->tagPollTxTime32l = dw_event->timeStamp32l;
inst->relpyAddress[0] = inst->msg_f.destAddr[0];
inst->relpyAddress[1] = inst->msg_f.destAddr[1];
inst->canprintinfo = 2;
}
if(inst->previousState == TA_TXRANGINGINIT_WAIT_SEND) //set frame control for the response message
{
dwt_writetxfctrl((ANCH_RESPONSE_F_MSG_LEN + FRAME_CRTL_AND_ADDRESS_S + FRAME_CRC + EXTRA_LENGTH), RESPONSE_MSG_OFFSET);
}
inst->testAppState = TA_RX_WAIT_DATA ; // wait for next frame
//turn RX on
if(inst->wait4ack == 0)
dwt_rxenable(0) ; // turn receiver on, immediate = 0/delayed = 1
inst->wait4ack = 0 ;
//dwt_readfromdevice(0x19, 0, 5, temp);
//sprintf((char*)&usbdata[20], "T2R%d %02x%02x%02x%02x%02x ", count, temp[4], temp[3], temp[2], temp[1], temp[0]);
//send_usbmessage(&usbdata[20], 16);
//count=0;
}
}
break ; // end case TA_TX_WAIT_CONF
case TA_RXE_WAIT :
//printf("TA_RXE_WAIT") ;
{
// - with "fast" ranging - we only get here after frame timeout...
//turn RX on
instancerxon(inst, 0, 0) ; // turn RX on, with/without delay
inst->testAppState = TA_RX_WAIT_DATA; // let this state handle it
// end case TA_RXE_WAIT, don't break, but fall through into the TA_RX_WAIT_DATA state to process it immediately.
if(message == 0) break;
}
case TA_RX_WAIT_DATA : // Wait RX data
//printf("TA_RX_WAIT_DATA") ;
switch (message)
{
case SIG_RX_BLINK :
{
instance_getevent(6); //get and clear this event
//else //not initiating ranging - continue to receive
{
inst->testAppState = TA_RX_WAIT_DATA ; // wait for next frame
//turn RX on
dwt_rxenable(0) ; // turn receiver on, immediate = 0/delayed = 1
inst->done = INST_NOT_DONE_YET;
}
}
break;
case SIG_RX_ACK :
{
event_data_t* dw_event = instance_getevent(7); //get and clear this event
inst_processackmsg(inst, dw_event->msgu.rxackmsg.seqNum);
//else we did not expect this ACK turn the RX on again
//only enable receiver when not using double buffering
inst->testAppState = TA_RX_WAIT_DATA ; // wait for next frame
//turn RX on
dwt_rxenable(0) ; // turn receiver on, immediate = 0/delayed = 1
inst->done = INST_NOT_DONE_YET;
}
break;
case DWT_SIG_RX_OKAY :
{
event_data_t* dw_event = instance_getevent(8); //get and clear this event
uint8 srcAddr[8] = {0,0,0,0,0,0,0,0};
int fcode = 0;
int fn_code = 0;
int srclen = 0;
int fctrladdr_len;
uint8 *messageData;
inst->stoptimer = 0; //clear the flag, as we have received a message
// 16 or 64 bit addresses
switch(dw_event->msgu.frame[1])
{
case 0xCC: //
memcpy(&srcAddr[0], &(dw_event->msgu.rxmsg_ll.sourceAddr[0]), ADDR_BYTE_SIZE_L);
fn_code = dw_event->msgu.rxmsg_ll.messageData[FCODE];
messageData = &dw_event->msgu.rxmsg_ll.messageData[0];
srclen = ADDR_BYTE_SIZE_L;
fctrladdr_len = FRAME_CRTL_AND_ADDRESS_L;
break;
case 0xC8: //
memcpy(&srcAddr[0], &(dw_event->msgu.rxmsg_sl.sourceAddr[0]), ADDR_BYTE_SIZE_L);
fn_code = dw_event->msgu.rxmsg_sl.messageData[FCODE];
messageData = &dw_event->msgu.rxmsg_sl.messageData[0];
srclen = ADDR_BYTE_SIZE_L;
fctrladdr_len = FRAME_CRTL_AND_ADDRESS_LS;
break;
case 0x8C: //
memcpy(&srcAddr[0], &(dw_event->msgu.rxmsg_ls.sourceAddr[0]), ADDR_BYTE_SIZE_S);
fn_code = dw_event->msgu.rxmsg_ls.messageData[FCODE];
messageData = &dw_event->msgu.rxmsg_ls.messageData[0];
srclen = ADDR_BYTE_SIZE_S;
fctrladdr_len = FRAME_CRTL_AND_ADDRESS_LS;
break;
case 0x88: //
memcpy(&srcAddr[0], &(dw_event->msgu.rxmsg_ss.sourceAddr[0]), ADDR_BYTE_SIZE_S);
fn_code = dw_event->msgu.rxmsg_ss.messageData[FCODE];
messageData = &dw_event->msgu.rxmsg_ss.messageData[0];
srclen = ADDR_BYTE_SIZE_S;
fctrladdr_len = FRAME_CRTL_AND_ADDRESS_S;
break;
}
if((inst->ackexpected) && (inst->ackTO)) //ACK frame was expected but we got a good frame - treat as ACK timeout
{
//printf("got good frame instead of ACK in DWT_SIG_RX_OKAY - pretend TO\n");
inst_processrxtimeout(inst);
message = 0; //clear the message as we have processed the event
}
else
{
inst->ackexpected = 0; //clear this as we got good frame (but as not using ACK TO) we prob missed the ACK - check if it has been addressed to us
fcode = fn_code; //tag has address filtering so if it received a frame it must be addressed to it
switch(fcode)
{
case RTLS_DEMO_MSG_RNG_INIT:
{
if(inst->mode == TAG_TDOA) //only start ranging with someone if not ranging already
{
//double delay = rxrngmsg->messageData[RES_T1] + (rxrngmsg->messageData[RES_T2] << 8); //in ms
inst->testAppState = TA_TXPOLL_WAIT_SEND ; // send next poll
//remember the anchor address
inst->msg_f.destAddr[0] = srcAddr[0];
inst->msg_f.destAddr[1] = srcAddr[1];
inst->msg_f.sourceAddr[0] = messageData[RES_R1];
inst->msg_f.sourceAddr[1] = messageData[RES_R1+1];
inst->tagShortAdd = (uint16)messageData[RES_R1] + ((uint16)messageData[RES_R2] << 8) ;
dwt_setaddress16(inst->tagShortAdd);
//instancesetreplydelay(delay); //
inst->mode = TAG ;
inst->rxTimeouts = 0; //reset timeout count
inst->instToSleep = 0; //don't go to sleep - start ranging instead and then sleep after 1 range is done
inst->done = INST_NOT_DONE_YET;
}
}
break; //RTLS_DEMO_MSG_RNG_INITF
case RTLS_DEMO_MSG_ANCH_RESPF:
{
#if (TWSYMRANGE == 1)
//need to write the delayed time before starting transmission
inst->delayedReplyTime32 = ((uint32)dw_event->timeStamp32h + (uint32)inst->fixedFastReplyDelay32h) ;
dwt_setdelayedtrxtime(inst->delayedReplyTime32) ;
dwt_writetxfctrl((TAG_FINAL_F_MSG_LEN + FRAME_CRTL_AND_ADDRESS_S + FRAME_CRC), FINAL_MSG_OFFSET);
if(dwt_starttx(DWT_START_TX_DELAYED))
{
//error - TX FAILED
// initiate the re-transmission
inst->testAppState = TA_TXE_WAIT ;
inst->nextState = TA_TXPOLL_WAIT_SEND;
dwt_entersleepaftertx(0);
inst->wait4ack = 0; //clear the flag as the TX has
inst->lateTX++;
break; //exit this switch case...
}
else
{
rtd_t rtd;
//calculate the difference between response rx and final tx
//here we just need to subtract the low 32 bits as the response delay is < 32bits (actually it is < 26 bits)
rtd.diffRmP = (uint32)dw_event->timeStamp32l - (uint32)inst->tagPollTxTime32l ;
//calculate difference between final tx and response rx
rtd.diffFmR = (uint32)inst->txantennaDelay + ((uint32)inst->fixedFastReplyDelay32h << 8) - ((uint32)dw_event->timeStamp32l & 0x1FF);
//write the rest of the message (the two response time differences (low 32 bits)
dwt_writetxdata((TAG_FINAL_F_MSG_LEN - 1 + FRAME_CRC), (uint8 *) &rtd, (FINAL_MSG_OFFSET+FRAME_CRTL_AND_ADDRESS_S+1)) ; // write the frame data
inst->sentSN = inst->msg_f.seqNum;
inst->previousState = TA_TXFINAL_WAIT_SEND;
//if Tag is not waiting for report - it will go to sleep automatically after the final is sent
inst->done = INST_DONE_WAIT_FOR_NEXT_EVENT_TO; //kick off the TagTimeoutTimer (instancetimer) to initiate wakeup
inst->testAppState = TA_SLEEP_DONE; //we are going automatically to sleep so no TX confirm interrupt (next state will be TA_SLEEP_DONE)
inst->canprintinfo = 1;
inst->txmsgcount ++;
inst->frame_sn++ ; //increment as final is sent
}
inst->respPSC = (dwt_read16bitoffsetreg(0x10, 2) >> 4);
inst->wait4ack = 0; //no response
inst->ackexpected = !ACK_REQUESTED ; //used to ignore unexpected ACK frames
//inst->rxu.anchorRespRxTime = inst->rxu.rxTimeStamp ; //Response's Rx time
inst->nextState = TA_TXPOLL_WAIT_SEND;
#else
if(inst->responseRxNum == 0) // this is first response
{
dwt_setrxtimeout(5000); //~5ms
//turn RX on
dwt_rxenable(0) ; // turn receiver on, immediate = 0/delayed = 1
inst->anchResp1RxTime32l = dw_event->timeStamp32l;
inst->responseRxNum++;
}
else // we have two responses and can calculate ToF
{
//the first response will be sent time X after reception of the poll, but as the tx time is snapped to 8ns
//we need to account for the low 9 bits of poll rx time in the RTD calculation
uint32 pollrxlowbits = (uint32)messageData[1] + (uint32)(messageData[2] << 8);
//RTD = (RxResp1 - TxPoll) - (RxResp2 - RxResp1)
//ToF = RTD/2 = RxResp1 - 0.5 * (TxPoll + RxResp2)
inst->tof32 = ((uint32)inst->anchResp1RxTime32l - (uint32)inst->tagPollTxTime32l + pollrxlowbits) - ((uint32)dw_event->timeStamp32l - (uint32)inst->anchResp1RxTime32l);
inst->tof32 <<= 1; //to make it compatible with reportTOF() which expects ToF*4
reportTOF_f(inst);
inst->newrange = 1;
inst->testAppState = TA_TXE_WAIT ;
inst->nextState = TA_TXPOLL_WAIT_SEND;
}
#endif
}
break; //RTLS_DEMO_MSG_ANCH_RESPF
case RTLS_DEMO_MSG_ANCH_TOFRF:
{
inst->tof32 = messageData[TOFR];
inst->tof32 += (uint32)messageData[TOFR+1] << 8;
inst->tof32 += (uint32)messageData[TOFR+2] << 16;
inst->tof32 += (uint32)messageData[TOFR+3] << 24;
if(dw_event->msgu.rxmsg_ss.seqNum != inst->lastReportSN)
{
reportTOF_f(inst);
inst->newrange = 1;
inst->lastReportSN = dw_event->msgu.rxmsg_ss.seqNum;
inst->newrangetagaddress = srcAddr[0] + ((uint16) srcAddr[1] << 8);
inst->newrangeancaddress = inst->eui64[0] + ((uint16) inst->eui64[1] << 8);
}
inst->testAppState = TA_TXE_WAIT;
inst->nextState = TA_TXPOLL_WAIT_SEND ; // send next poll
}
break; //RTLS_DEMO_MSG_ANCH_TOFRF
default:
{
//only enable receiver when not using double buffering
inst->testAppState = TA_RX_WAIT_DATA ; // wait for next frame
//turn RX on
dwt_rxenable(0) ; // turn receiver on, immediate = 0/delayed = 1
}
break;
} //end switch (rxmsg->functionCode)
if(dw_event->msgu.frame[0] & 0x20)
{
//as we only pass the received frame with the ACK request bit set after the ACK has been sent
instance_getevent(9); //get and clear the ACK sent event
}
}
}
break ;
case DWT_SIG_RX_TIMEOUT :
//printf("PD_DATA_TIMEOUT") ;
instance_getevent(26); //get and clear this event
inst_processrxtimeout(inst);
message = 0; //clear the message as we have processed the event
break ;
case DWT_SIG_TX_AA_DONE: //ignore this event - just process the rx frame that was received before the ACK response
case 0: //no event - wait in receive...
{
//stay in Rx (fall-through from above state)
//if(DWT_SIG_TX_AA_DONE == message) printf("Got SIG_TX_AA_DONE in RX wait - ignore\n");
if(inst->done == INST_NOT_DONE_YET) inst->done = INST_DONE_WAIT_FOR_NEXT_EVENT;
}
break;
default :
{
//printf("\nERROR - Unexpected message %d ??\n", message) ;
//assert(0) ; // Unexpected Primitive what is going on ?
}
break ;
}
break ; // end case TA_RX_WAIT_DATA
default:
//printf("\nERROR - invalid state %d - what is going on??\n", inst->testAppState) ;
break;
} // end switch on testAppState
return inst->done;
} // end testapprun()
/**
* Application entry point.
*/
int rxWait(void)
{
/* Reset and initialise DW1000.
* For initialisation, DW1000 clocks must be temporarily set to crystal speed. After initialisation SPI rate can be increased for optimum
* performance. */
int i;
reset_DW1000(); /* Target specific drive of RSTn line into DW1000 low for a period. */
//spi_set_rate_low();
dwt_initialise(DWT_LOADNONE);
//spi_set_rate_high();
/* Configure DW1000. See NOTE 2 below. */
dwt_configure(&config);
/* Loop forever sending and receiving frames periodically. */
while (1)
{
/* Activate reception immediately. See NOTE 3 below. */
dwt_rxenable(0);
/* Poll until a frame is properly received or an error occurs. See NOTE 4 below.
* STATUS register is 5 bytes long but, as the events we are looking at are in the lower bytes of the register, we can use this simplest API
* function to access it. */
while (!((status_reg = dwt_read32bitreg(SYS_STATUS_ID)) & (SYS_STATUS_RXFCG | SYS_STATUS_ALL_RX_ERR)))
{ };
printf("Status reg now 0x%x\r\n",status_reg);
if (status_reg & SYS_STATUS_RXFCG)
{
/* A frame has been received, read it into the local buffer. */
frame_len = dwt_read32bitreg(RX_FINFO_ID) & RX_FINFO_RXFL_MASK_1023;
if (frame_len <= FRAME_LEN_MAX)
{
dwt_readrxdata(rx_buffer, frame_len, 0);
}
/* Clear good RX frame event in the DW1000 status register. */
dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_RXFCG);
for (i=0;i<frame_len;i++) {
printf("%x ",rx_buffer[i]);
}
printf("\r\n");
/* Validate the frame is the one expected as sent by "TX then wait for a response" example. */
if ((frame_len == 14) && (rx_buffer[0] == 0xC5) && (rx_buffer[10] == 0x43) && (rx_buffer[11] == 0x2))
{
int i;
/* Copy source address of blink in response destination address. */
for (i = 0; i < 8; i++)
{
tx_msg[DATA_FRAME_DEST_IDX + i] = rx_buffer[BLINK_FRAME_SRC_IDX + i];
}
/* Write response frame data to DW1000 and prepare transmission. See NOTE 5 below.*/
dwt_writetxdata(sizeof(tx_msg), tx_msg, 0);
dwt_writetxfctrl(sizeof(tx_msg), 0);
/* Send the response. */
dwt_starttx(DWT_START_TX_IMMEDIATE);
/* Poll DW1000 until TX frame sent event set. */
while (!(dwt_read32bitreg(SYS_STATUS_ID) & SYS_STATUS_TXFRS))
{ };
/* Clear TX frame sent event. */
dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_TXFRS);
/* Increment the data frame sequence number (modulo 256). */
tx_msg[DATA_FRAME_SN_IDX]++;
}
}
else
{
/* Clear RX error events in the DW1000 status register. */
dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_ALL_RX_ERR);
printf("Some RX errors ...\r\n");
}
}
}
void listener_run(void) {
uint32_t announce_coord_ts = 0;
uint32_t elapsed = 0;
uint32_t last_ts = 0;
uint32_t count = 0;
irq_init();
pio_disable_interrupt(DW_IRQ_PIO, DW_IRQ_MASK);
// Setup DW1000
dwt_txconfig_t txconfig;
// Setup DECAWAVE
reset_DW1000();
spi_set_rate_low();
dwt_initialise(DWT_LOADUCODE);
spi_set_rate_high();
dwt_configure(&cph_config->dwt_config);
dwt_setpanid(0x4350);
dwt_setaddress16(0x1234);
// Clear CLKPLL_LL
dwt_write32bitreg(SYS_STATUS_ID, 0x02000000);
uint32_t id = dwt_readdevid();
printf("Device ID: %08X\r\n", id);
#if 1
dwt_setcallbacks(0, rxcallback);
dwt_setinterrupt(
DWT_INT_TFRS | DWT_INT_RFCG
| (DWT_INT_ARFE | DWT_INT_RFSL | DWT_INT_SFDT | DWT_INT_RPHE | DWT_INT_RFCE | DWT_INT_RFTO /*| DWT_INT_RXPTO*/),
1);
pio_enable_interrupt(DW_IRQ_PIO, DW_IRQ_MASK);
dwt_rxenable(0);
while (1) {
elapsed = cph_get_millis() - last_ts;
if (elapsed > 5000) {
printf("alive %d\r\n", count++);
last_ts = cph_get_millis();
}
if (trx_signal == SIGNAL_RCV) {
printf("[RCV] %d - ", frame_len);
for (int i = 0; i < frame_len; i++) {
printf("%02X ", rx_buffer[i]);
}
printf("\r\n");
trx_signal = SIGNAL_EMPTY;
dwt_rxenable(0);
}
else if(trx_signal == SIGNAL_ERR) {
printf("ERROR: %08X\r\n", error_status_reg);
trx_signal = SIGNAL_EMPTY;
dwt_rxenable(0);
}
else if(trx_signal == SIGNAL_ERR_LEN) {
printf("ERROR LENGTH: %08X\r\n", error_status_reg);
trx_signal = SIGNAL_EMPTY;
dwt_rxenable(0);
}
}
#else
while (1) {
/* Activate reception immediately. */
dwt_rxenable(0);
while (!((status_reg = dwt_read32bitreg(SYS_STATUS_ID)) & (SYS_STATUS_RXFCG | SYS_STATUS_ALL_RX_ERR))) {
};
if (status_reg & SYS_STATUS_RXFCG) {
uint32 frame_len;
dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_RXFCG);
frame_len = dwt_read32bitreg(RX_FINFO_ID) & RX_FINFO_RXFL_MASK_1023;
if (frame_len <= MAXRXSIXZE) {
dwt_readrxdata(rx_buffer, frame_len, 0);
} else {
frame_len = 0;
}
if (frame_len > 0) {
printf("[RCV] ");
for (int i = 0; i < frame_len; i++) {
printf("%02X ", rx_buffer[i]);
}
printf("\r\n");
} else {
printf("ERROR: frame_len == %d\r\n", frame_len);
}
} else {
printf("ERROR: dwt_rxenable has status of %08X\r\n", status_reg);
/* Clear RX error events in the DW1000 status register. */
dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_ALL_RX_ERR | SYS_STATUS_CLKPLL_LL);
}
}
#endif
}
// -------------------------------------------------------------------------------------------------------------------
//
// the main instance state machine (all the instance modes Tag, Anchor or Listener use the same statemachine....)
//
// -------------------------------------------------------------------------------------------------------------------
//
int testapprun(instance_data_t *inst, int message)
{
switch (inst->testAppState)
{
case TA_INIT :
#if defined(DEBUG)
printf("TA_INIT") ;
#endif
switch (inst->mode)
{
case TAG:
{
uint16 sleep_mode = 0;
dwt_enableframefilter(DWT_FF_DATA_EN | DWT_FF_ACK_EN); //allow data, ack frames;
dwt_setpanid(inst->panID);
memcpy(inst->eui64, &inst->instanceAddress16, ADDR_BYTE_SIZE_S);
dwt_seteui(inst->eui64);
//set source address
inst->newRangeTagAddress = inst->instanceAddress16 ;
dwt_setaddress16(inst->instanceAddress16);
//Start off by Sleeping 1st -> set instToSleep to TRUE
inst->nextState = TA_TXPOLL_WAIT_SEND;
inst->testAppState = TA_TXE_WAIT;
inst->instToSleep = TRUE ;
inst->rangeNum = 0;
inst->tagSleepCorrection = 0;
sleep_mode = (DWT_LOADUCODE|DWT_PRESRV_SLEEP|DWT_CONFIG|DWT_TANDV);
if((dwt_getldotune() != 0)) //if we need to use LDO tune value from OTP kick it after sleep
sleep_mode |= DWT_LOADLDO;
if(inst->configData.txPreambLength == DWT_PLEN_64) //if using 64 length preamble then use the corresponding OPSet
sleep_mode |= DWT_LOADOPSET;
#if (DEEP_SLEEP == 1)
dwt_configuresleep(sleep_mode, DWT_WAKE_WK|DWT_WAKE_CS|DWT_SLP_EN); //configure the on wake parameters (upload the IC config settings)
#endif
instanceconfigframeheader16(inst);
inst->instanceWakeTime = portGetTickCount();
}
break;
case ANCHOR:
{
memcpy(inst->eui64, &inst->instanceAddress16, ADDR_BYTE_SIZE_S);
dwt_seteui(inst->eui64);
dwt_setpanid(inst->panID);
//set source address
inst->shortAdd_idx = (inst->instanceAddress16 & 0x3) ;
dwt_setaddress16(inst->instanceAddress16);
//if address = 0x8000
if(inst->instanceAddress16 == GATEWAY_ANCHOR_ADDR)
{
inst->gatewayAnchor = TRUE;
}
dwt_enableframefilter(DWT_FF_NOTYPE_EN); //allow data, ack frames;
// First time anchor listens we don't do a delayed RX
dwt_setrxaftertxdelay(0);
//change to next state - wait to receive a message
inst->testAppState = TA_RXE_WAIT ;
dwt_setrxtimeout(0);
dwt_setpreambledetecttimeout(0);
instanceconfigframeheader16(inst);
}
break;
case LISTENER:
{
dwt_enableframefilter(DWT_FF_NOTYPE_EN); //disable frame filtering
dwt_setrxaftertxdelay(0); //no delay of turning on of RX
dwt_setrxtimeout(0);
dwt_setpreambledetecttimeout(0);
//change to next state - wait to receive a message
inst->testAppState = TA_RXE_WAIT ;
}
break ; // end case TA_INIT
default:
break;
}
break; // end case TA_INIT
case TA_SLEEP_DONE :
{
event_data_t* dw_event = instance_getevent(10); //clear the event from the queue
// waiting for timout from application to wakup IC
if (dw_event->type != DWT_SIG_RX_TIMEOUT)
{
// if no pause and no wake-up timeout continu waiting for the sleep to be done.
inst->done = INST_DONE_WAIT_FOR_NEXT_EVENT; //wait here for sleep timeout
break;
}
inst->done = INST_NOT_DONE_YET;
inst->instToSleep = FALSE ;
inst->testAppState = inst->nextState;
inst->nextState = 0; //clear
inst->instanceWakeTime = portGetTickCount(); // Record the time count when we wake-up
#if (DEEP_SLEEP == 1)
{
uint32 x = 0;
//wake up device from low power mode
//NOTE - in the ARM code just drop chip select for 200us
//led_on(LED_PC9);
port_SPIx_clear_chip_select(); //CS low
instance_data[0].dwIDLE = 0; //reset DW1000 IDLE flag
setup_DW1000RSTnIRQ(1); //enable RSTn IRQ
Sleep(2); //200 us to wake up - need 2 as Sleep(1) is ~ 175 us
//then wait 5ms for DW1000 XTAL to stabilise - instead of wait we wait for RSTn to go high
//Sleep(5);
Sleep(83);
//need to poll to check when the DW1000 is in IDLE, the CPLL interrupt is not reliable
//when RSTn goes high the DW1000 is in INIT, it will enter IDLE after PLL lock (in 5 us)
/*while(instance_data[0].dwIDLE == 0) // this variable will be sent in the IRQ (process_dwRSTn_irq)
{
//wait for DW1000 to go to IDLE state RSTn pin to go high
x++;
}*/
setup_DW1000RSTnIRQ(0); //disable RSTn IRQ
port_SPIx_set_chip_select(); //CS high
//!!! NOTE it takes ~35us for the DW1000 to download AON and lock the PLL and be in IDLE state
//do some dummy reads of the dev ID register to make sure DW1000 is in IDLE before setting LEDs
x = dwt_readdevid(); //dummy read... need to wait for 5 us to exit INIT state (5 SPI bytes @ ~18 MHz)
x = dwt_readdevid(); //dummy read... need to wait for 5 us to exit INIT state (5 SPI bytes @ ~18 MHz)
x = dwt_readdevid(); //dummy read... need to wait for 5 us to exit INIT state (5 SPI bytes @ ~18 MHz)
x = dwt_readdevid(); //dummy read... need to wait for 5 us to exit INIT state (5 SPI bytes @ ~18 MHz)
x = dwt_readdevid(); //dummy read... need to wait for 5 us to exit INIT state (5 SPI bytes @ ~18 MHz)
/*if(x != DWT_DEVICE_ID)
{
x = dwt_readdevid(); //dummy read... need to wait for 5 us to exit INIT state (5 SPI bytes @ ~18 MHz)
}*/
//led_off(LED_PC9);
//this is platform dependent - only program if DW EVK/EVB
dwt_setleds(1);
//MP bug - TX antenna delay needs reprogramming as it is not preserved (only RX)
dwt_settxantennadelay(inst->txAntennaDelay) ;
//set EUI as it will not be preserved unless the EUI is programmed and loaded from NVM
dwt_seteui(inst->eui64);
}
#else
Sleep(3); //to approximate match the time spent in the #if above
#endif
instancesetantennadelays(); //this will update the antenna delay if it has changed
instancesettxpower(); //configure TX power if it has changed
}
break;
case TA_TXE_WAIT : //either go to sleep or proceed to TX a message
#if defined(DEBUG)
printf("TA_TXE_WAIT\n") ;
#endif
//if we are scheduled to go to sleep before next transmission then sleep first.
if((inst->nextState == TA_TXPOLL_WAIT_SEND)
&& (inst->instToSleep) //go to sleep before sending the next poll/ starting new ranging exchange
)
{
inst->rangeNum++; //increment the range number before going to sleep
//the app should put chip into low power state and wake up after tagSleepTime_ms time...
//the app could go to *_IDLE state and wait for uP to wake it up...
inst->done = INST_DONE_WAIT_FOR_NEXT_EVENT_TO; //don't sleep here but kick off the Sleep timer countdown
inst->testAppState = TA_SLEEP_DONE;
{
#if (DEEP_SLEEP == 1)
//put device into low power mode
dwt_entersleep(); //go to sleep
#endif
//DW1000 gone to sleep - report the received range
inst->newRange = instance_calcranges(&inst->tofArray[0], MAX_ANCHOR_LIST_SIZE, TOF_REPORT_T2A, &inst->rxResponseMask);
inst->rxResponseMaskReport = inst->rxResponseMask;
inst->rxResponseMask = 0;
inst->newRangeTime = portGetTickCount() ;
}
}
else //proceed to configuration and transmission of a frame
{
inst->testAppState = inst->nextState;
inst->nextState = 0; //clear
}
break ; // end case TA_TXE_WAIT
case TA_TXPOLL_WAIT_SEND :
{
#if defined(DEBUG)
printf("TA_TXPOLL_WAIT_SEND\n") ;
#endif
inst->msg_f.messageData[POLL_RNUM] = (inst->mode == TAG) ? inst->rangeNum : inst->rangeNumAnc; //copy new range number
inst->msg_f.messageData[FCODE] = (inst->mode == TAG) ? RTLS_DEMO_MSG_TAG_POLL : RTLS_DEMO_MSG_ANCH_POLL; //message function code (specifies if message is a poll, response or other...)
inst->psduLength = (TAG_POLL_MSG_LEN + FRAME_CRTL_AND_ADDRESS_S + FRAME_CRC);
inst->msg_f.seqNum = inst->frameSN++; //copy sequence number and then increment
inst->msg_f.sourceAddr[0] = inst->eui64[0]; //copy the address
inst->msg_f.sourceAddr[1] = inst->eui64[1]; //copy the address
inst->msg_f.destAddr[0] = 0xff; //set the destination address (broadcast == 0xffff)
inst->msg_f.destAddr[1] = 0xff; //set the destination address (broadcast == 0xffff)
dwt_writetxdata(inst->psduLength, (uint8 *) &inst->msg_f, 0) ; // write the frame data
//set the delayed rx on time (the response message will be sent after this delay (from A0))
dwt_setrxaftertxdelay((uint32)RX_RESPONSE1_TURNAROUND); //units are 1.0256us - wait for wait4respTIM before RX on (delay RX)
if(inst->mode == TAG)
{
inst->rxResps[inst->rangeNum] = 0; //reset the number of received responses
inst->responseTO = MAX_ANCHOR_LIST_SIZE; //expecting 4 responses
dwt_setrxtimeout((uint16)inst->fwtoTime_sy * MAX_ANCHOR_LIST_SIZE); //configure the RX FWTO
}
else
{
inst->rxResps[inst->rangeNumAnc] = 0; //reset number of responses
inst->responseTO = NUM_EXPECTED_RESPONSES_ANC0; //2 responses A1, A2
dwt_setrxtimeout((uint16)inst->fwtoTime_sy * (NUM_EXPECTED_RESPONSES_ANC0)); //units are
}
inst->rxResponseMask = 0; //reset/clear the mask of received responses when tx poll
inst->rxResponseMaskAnc = 0;
inst->wait4ack = DWT_RESPONSE_EXPECTED; //response is expected - automatically enable the receiver
dwt_writetxfctrl(inst->psduLength, 0); //write frame control
dwt_starttx(DWT_START_TX_IMMEDIATE | DWT_RESPONSE_EXPECTED); //transmit the frame
inst->testAppState = TA_TX_WAIT_CONF ; // wait confirmation
inst->previousState = TA_TXPOLL_WAIT_SEND ;
inst->done = INST_DONE_WAIT_FOR_NEXT_EVENT; //will use RX FWTO to time out (set above)
}
break;
case TA_TXFINAL_WAIT_SEND :
{
//the final has the same range number as the poll (part of the same ranging exchange)
inst->msg_f.messageData[POLL_RNUM] = (inst->mode == TAG) ? inst->rangeNum : inst->rangeNumAnc;
//the mask is sent so the anchors know whether the response RX time is valid
inst->msg_f.messageData[VRESP] = (inst->mode == TAG) ? inst->rxResponseMask : inst->rxResponseMaskAnc;
inst->msg_f.messageData[FCODE] = (inst->mode == TAG) ? RTLS_DEMO_MSG_TAG_FINAL : RTLS_DEMO_MSG_ANCH_FINAL; //message function code (specifies if message is a poll, response or other...)
inst->psduLength = (TAG_FINAL_MSG_LEN + FRAME_CRTL_AND_ADDRESS_S + FRAME_CRC);
inst->msg_f.seqNum = inst->frameSN++;
dwt_writetxdata(inst->psduLength, (uint8 *) &inst->msg_f, 0) ; // write the frame data
inst->wait4ack = 0; //clear the flag not using wait for response as this message ends the ranging exchange
if(instancesenddlypacket(inst, DWT_START_TX_DELAYED))
{
// initiate the re-transmission
if(inst->mode == TAG)
{
inst->testAppState = TA_TXE_WAIT ; //go to TA_TXE_WAIT first to check if it's sleep time
inst->nextState = TA_TXPOLL_WAIT_SEND ;
}
else
{
//A0 - failed to send Final
//A1 - failed to send Final
//go back to RX and behave as anchor
instance_backtoanchor(inst);
}
break; //exit this switch case...
}
else
{
inst->testAppState = TA_TX_WAIT_CONF; // wait confirmation
inst->previousState = TA_TXFINAL_WAIT_SEND;
}
if(inst->mode == TAG)
{
inst->instToSleep = TRUE ;
}
inst->done = INST_DONE_WAIT_FOR_NEXT_EVENT; //will use RX FWTO to time out (set above)
}
break;
case TA_TX_WAIT_CONF :
#if defined(DEBUG)
printf("TA_TX_WAIT_CONF %d m%d states %08x %08x\n", inst->previousState, message, dwt_read32bitreg(0x19), dwt_read32bitreg(0x0f)) ;
#endif
{
event_data_t* dw_event = instance_getevent(11); //get and clear this event
//NOTE: Can get the ACK before the TX confirm event for the frame requesting the ACK
//this happens because if polling the ISR the RX event will be processed 1st and then the TX event
//thus the reception of the ACK will be processed before the TX confirmation of the frame that requested it.
if(dw_event->type != DWT_SIG_TX_DONE) //wait for TX done confirmation
{
if(dw_event->type != 0)
{
if(dw_event->type == DWT_SIG_RX_TIMEOUT) //got RX timeout - i.e. did not get the response (e.g. ACK)
{
#if defined(DEBUG)
printf("RX timeout in TA_TX_WAIT_CONF (%d)\n", inst->previousState);
#endif
//we need to wait for SIG_TX_DONE and then process the timeout and re-send the frame if needed
inst->gotTO = 1;
}
else
{
inst->done = INST_DONE_WAIT_FOR_NEXT_EVENT;
}
}
inst->done = INST_DONE_WAIT_FOR_NEXT_EVENT;
break;
}
inst->done = INST_NOT_DONE_YET;
if(inst->previousState == TA_TXFINAL_WAIT_SEND)
{
if(inst->mode == TAG)
{
inst->testAppState = TA_TXE_WAIT ;
inst->nextState = TA_TXPOLL_WAIT_SEND ;
break;
}
else
{
instance_backtoanchor(inst);
}
}
else if (inst->gotTO == 1) //timeout
{
#if defined(DEBUG)
printf("got TO in TA_TX_WAIT_CONF\n");
#endif
inst_processrxtimeout(inst);
inst->gotTO = 0;
inst->wait4ack = 0 ; //clear this
break;
}
else
{
inst->txu.txTimeStamp = dw_event->timeStamp;
if(inst->previousState == TA_TXPOLL_WAIT_SEND)
{
uint64 tagCalculatedFinalTxTime ;
// Embed into Final message: 40-bit pollTXTime, 40-bit respRxTime, 40-bit finalTxTime
if(inst->mode == TAG)
{
tagCalculatedFinalTxTime = (inst->txu.txTimeStamp + inst->pollTx2FinalTxDelay) & MASK_TXDTS;
}
else //for anchor make the final half the delay ..... (this is ok, as A0 awaits 2 responses)
{
tagCalculatedFinalTxTime = (inst->txu.txTimeStamp + inst->pollTx2FinalTxDelayAnc) & MASK_TXDTS;
}
inst->delayedReplyTime = tagCalculatedFinalTxTime >> 8; //high 32-bits
// Calculate Time Final message will be sent and write this field of Final message
// Sending time will be delayedReplyTime, snapped to ~125MHz or ~250MHz boundary by
// zeroing its low 9 bits, and then having the TX antenna delay added
// getting antenna delay from the device and add it to the Calculated TX Time
tagCalculatedFinalTxTime = tagCalculatedFinalTxTime + inst->txAntennaDelay;
tagCalculatedFinalTxTime &= MASK_40BIT;
// Write Calculated TX time field of Final message
memcpy(&(inst->msg_f.messageData[FTXT]), (uint8 *)&tagCalculatedFinalTxTime, 5);
// Write Poll TX time field of Final message
memcpy(&(inst->msg_f.messageData[PTXT]), (uint8 *)&inst->txu.tagPollTxTime, 5);
//change the w4r for the second and remaining anchors to 50 us
//dwt_setrxaftertxdelay((uint32)RX_RESPONSEX_TURNAROUND); //units are 1.0256us - wait for wait4respTIM before RX on (delay RX)
}
if(inst->previousState == TA_TXRESPONSE_SENT_TORX)
{
inst->previousState = TA_TXRESPONSE_WAIT_SEND ;
}
inst->testAppState = TA_RXE_WAIT ; // After sending, tag expects response/report, anchor waits to receive a final/new poll
message = 0;
//fall into the next case (turn on the RX)
}
}
//break ; // end case TA_TX_WAIT_CONF
case TA_RXE_WAIT :
#if defined(DEBUG)
printf("TA_RXE_WAIT\n") ;
#endif
{
if(inst->wait4ack == 0) //if this is set the RX will turn on automatically after TX
{
//turn RX on
dwt_rxenable(DWT_START_RX_IMMEDIATE) ; // turn RX on, without delay
}
else
{
inst->wait4ack = 0 ; //clear the flag, the next time we want to turn the RX on it might not be auto
}
if (inst->mode != LISTENER)
{
inst->done = INST_DONE_WAIT_FOR_NEXT_EVENT; //using RX FWTO
}
inst->testAppState = TA_RX_WAIT_DATA; // let this state handle it
// end case TA_RXE_WAIT, don't break, but fall through into the TA_RX_WAIT_DATA state to process it immediately.
if(message == 0) break;
}
case TA_RX_WAIT_DATA : // Wait RX data
#if defined(DEBUG)
printf("TA_RX_WAIT_DATA %d\n", message) ;
#endif
switch (message)
{
//if we have received a DWT_SIG_RX_OKAY event - this means that the message is IEEE data type - need to check frame control to know which addressing mode is used
case DWT_SIG_RX_OKAY :
{
event_data_t* dw_event = instance_getevent(15); //get and clear this event
uint8 srcAddr[8] = {0,0,0,0,0,0,0,0};
uint8 dstAddr[8] = {0,0,0,0,0,0,0,0};
int fcode = 0;
int fn_code = 0;
//int srclen = 0;
//int fctrladdr_len;
uint8 tof_idx = 0;
uint8 *messageData;
inst->stopTimer = 0; //clear the flag, as we have received a message
// handle 16 and 64 bit source and destination addresses
switch(dw_event->msgu.frame[1] & 0xCC)
{
case 0xCC: //
memcpy(&srcAddr[0], &(dw_event->msgu.rxmsg_ll.sourceAddr[0]), ADDR_BYTE_SIZE_L);
memcpy(&dstAddr[0], &(dw_event->msgu.rxmsg_ll.destAddr[0]), ADDR_BYTE_SIZE_L);
fn_code = dw_event->msgu.rxmsg_ll.messageData[FCODE];
messageData = &dw_event->msgu.rxmsg_ll.messageData[0];
//srclen = ADDR_BYTE_SIZE_L;
//fctrladdr_len = FRAME_CRTL_AND_ADDRESS_L;
break;
case 0xC8: //
memcpy(&srcAddr[0], &(dw_event->msgu.rxmsg_sl.sourceAddr[0]), ADDR_BYTE_SIZE_L);
memcpy(&dstAddr[0], &(dw_event->msgu.rxmsg_sl.destAddr[0]), ADDR_BYTE_SIZE_S);
fn_code = dw_event->msgu.rxmsg_sl.messageData[FCODE];
messageData = &dw_event->msgu.rxmsg_sl.messageData[0];
//srclen = ADDR_BYTE_SIZE_L;
//fctrladdr_len = FRAME_CRTL_AND_ADDRESS_LS;
break;
case 0x8C: //
memcpy(&srcAddr[0], &(dw_event->msgu.rxmsg_ls.sourceAddr[0]), ADDR_BYTE_SIZE_S);
memcpy(&dstAddr[0], &(dw_event->msgu.rxmsg_ls.destAddr[0]), ADDR_BYTE_SIZE_L);
fn_code = dw_event->msgu.rxmsg_ls.messageData[FCODE];
messageData = &dw_event->msgu.rxmsg_ls.messageData[0];
//srclen = ADDR_BYTE_SIZE_S;
//fctrladdr_len = FRAME_CRTL_AND_ADDRESS_LS;
break;
case 0x88: //
memcpy(&srcAddr[0], &(dw_event->msgu.rxmsg_ss.sourceAddr[0]), ADDR_BYTE_SIZE_S);
memcpy(&dstAddr[0], &(dw_event->msgu.rxmsg_ss.destAddr[0]), ADDR_BYTE_SIZE_S);
fn_code = dw_event->msgu.rxmsg_ss.messageData[FCODE];
messageData = &dw_event->msgu.rxmsg_ss.messageData[0];
//srclen = ADDR_BYTE_SIZE_S;
//fctrladdr_len = FRAME_CRTL_AND_ADDRESS_S;
break;
}
if((inst->instToSleep == FALSE) && (inst->mode == LISTENER))//update received data, and go back to receiving frames
{
//do something with message data (e.g. could extract any ToFs and print them)
inst->testAppState = TA_RXE_WAIT ; // wait for next frame
dwt_setrxaftertxdelay(0);
}
else
{
//process ranging messages
fcode = fn_code;
tof_idx = srcAddr[0] & 0x3 ;
switch(fcode)
{
case RTLS_DEMO_MSG_ANCH_POLL:
case RTLS_DEMO_MSG_TAG_POLL:
{
inst->tagPollRxTime = dw_event->timeStamp ; //save Poll's Rx time
if(fcode == RTLS_DEMO_MSG_TAG_POLL) //got poll from Tag
{
inst->rangeNumA[srcAddr[0]&0x7] = messageData[POLL_RNUM]; //when anchor receives a poll, we need to remember the new range number
}
else //got poll from Anchor (initiator)
{
inst->rangeNumAAnc[tof_idx] = messageData[POLL_RNUM]; //when anchor receives poll from another anchor - save the range number
}
if (A1_ANCHOR_ADDR == inst->instanceAddress16) //this is A1
{
if(GATEWAY_ANCHOR_ADDR == (srcAddr[0] | ((uint32)(srcAddr[1] << 8)))) //poll is from A0
{
//configure the time A1 will poll A2 (it should be in half slot time from now)
inst->a1SlotTime = dw_event->uTimeStamp + (inst->slotPeriod);
//inst->instanceTimerEn = 1; - THIS IS ENABLED BELOW AFTER FINAL
// - means that if final is not received then A1 will not range to A2
}
}
//the response has been sent - await TX done event
if(dw_event->type_pend == DWT_SIG_TX_PENDING)
{
inst->testAppState = TA_TX_WAIT_CONF; // wait confirmation
inst->previousState = TA_TXRESPONSE_SENT_POLLRX ; //wait for TX confirmation of sent response
}
//already re-enabled the receiver
else if (dw_event->type_pend == DWT_SIG_RX_PENDING)
{
//stay in RX wait for next frame...
//RX is already enabled...
inst->testAppState = TA_RX_WAIT_DATA ; // wait for next frame
}
else //the DW1000 is idle (re-enable from the application level)
{
//stay in RX wait for next frame...
inst->testAppState = TA_RXE_WAIT ; // wait for next frame
}
}
break; //RTLS_DEMO_MSG_TAG_POLL
case RTLS_DEMO_MSG_ANCH_RESP2:
case RTLS_DEMO_MSG_ANCH_RESP:
{
uint8 currentRangeNum = (messageData[TOFRN] + 1); //current = previous + 1
if(GATEWAY_ANCHOR_ADDR == (srcAddr[0] | ((uint32)(srcAddr[1] << 8)))) //if response from gateway then use the correction factor
{
if(inst->mode == TAG)
{
// casting received bytes to int because this is a signed correction -0.5 periods to +1.5 periods
inst->tagSleepCorrection = (int16) (((uint16) messageData[RES_TAG_SLP1] << 8) + messageData[RES_TAG_SLP0]);
inst->tagSleepRnd = 0; // once we have initial response from Anchor #0 the slot correction acts and we don't need this anymore
}
}
//the response has been sent - await TX done event
if(dw_event->type_pend == DWT_SIG_TX_PENDING) //anchor received response from anchor ID - 1 so is sending it's response now back to tag
{
inst->testAppState = TA_TX_WAIT_CONF; // wait confirmation
inst->previousState = TA_TXRESPONSE_SENT_RESPRX ; //wait for TX confirmation of sent response
}
//already re-enabled the receiver
else if(dw_event->type_pend == DWT_SIG_RX_PENDING)
{
// stay in TA_RX_WAIT_DATA - receiver is already enabled.
}
//DW1000 idle - send the final
else //if(dw_event->type_pend == DWT_SIG_DW_IDLE)
{
if(((TAG == inst->mode) && (inst->rxResponseMask & 0x1)) //if A0's response received send the final
|| ((A1_ANCHOR_ADDR == inst->instanceAddress16) && (inst->rxResponseMaskAnc & 0x4))
|| ((GATEWAY_ANCHOR_ADDR == inst->instanceAddress16) && (inst->rxResponseMaskAnc & 0x2)) ) //if A1's response received
{
inst->testAppState = TA_TXFINAL_WAIT_SEND ; // send our response / the final
}
else //go to sleep
{
if(TAG == inst->mode)
{
inst->testAppState = TA_TXE_WAIT ; //go to TA_TXE_WAIT first to check if it's sleep time
inst->nextState = TA_TXPOLL_WAIT_SEND ;
inst->instToSleep = TRUE;
}
else
{
instance_backtoanchor(inst);
}
}
}
/*else
{
//stay in RX wait for next frame...
inst->testAppState = TA_RXE_WAIT ; // wait for next frame
}*/
if(fcode == RTLS_DEMO_MSG_ANCH_RESP) //tag to anchor mode
{
if(currentRangeNum == inst->rangeNum) //these are the previous ranges...
{
//copy the ToF and put into array (array holds last 4 ToFs)
memcpy(&inst->tofArray[(srcAddr[0]&0x3)], &(messageData[TOFR]), 4);
//check if the ToF is valid, this makes sure we only report valid ToFs
//e.g. consider the case of reception of response from anchor a1 (we are anchor a2)
//if a1 got a Poll with previous Range number but got no Final, then the response will have
//the correct range number but the range will be INVALID_TOF
if(inst->tofArray[(srcAddr[0]&0x3)] != INVALID_TOF)
{
inst->rxResponseMask |= (0x1 << (srcAddr[0]&0x3));
}
}
else
{
if(inst->tofArray[(srcAddr[0]&0x3)] != INVALID_TOF)
{
inst->tofArray[(srcAddr[0]&0x3)] = INVALID_TOF;
}
}
}
else //anchor to anchor (only gateway processes anchor to anchor ToFs)
{
//report the correct set of ranges (ranges from anchors A1, A2 need to match owns range number)
if((inst->gatewayAnchor)&&(currentRangeNum == inst->rangeNumAnc)) //these are the previous ranges...
{
inst->rangeNumAAnc[0] = inst->rangeNumAnc ;
//once A0 receives A2's response then it can report the 3 ToFs.
if(inst->rxResps[inst->rangeNumAnc] == 3)
//if(A2_ANCHOR_ADDR == (srcAddr[0] | ((uint32)(srcAddr[1] << 8))))
{
//copy the ToF and put into array, the array should have 3 ToFs A0-A1, A0-A2 and A1-A2
memcpy(&inst->tofArrayAnc[(srcAddr[0]+dstAddr[0])&0x3], &(messageData[TOFR]), 4);
//calculate all anchor - anchor ranges... and report
inst->newRange = instance_calcranges(&inst->tofArrayAnc[0], MAX_ANCHOR_LIST_SIZE, TOF_REPORT_A2A, &inst->rxResponseMaskAnc);
inst->rxResponseMaskReport = inst->rxResponseMaskAnc;
inst->rxResponseMaskAnc = 0;
inst->newRangeTime = dw_event->uTimeStamp ;
}
else
{
//copy the ToF and put into array (array holds last 4 ToFs)
memcpy(&inst->tofArrayAnc[(srcAddr[0]+dstAddr[0])&0x3], &(messageData[TOFR]), 4);
}
}
}
}
break; //RTLS_DEMO_MSG_ANCH_RESP
case RTLS_DEMO_MSG_ANCH_FINAL:
case RTLS_DEMO_MSG_TAG_FINAL:
{
int64 Rb, Da, Ra, Db ;
uint64 tagFinalTxTime = 0;
uint64 tagFinalRxTime = 0;
uint64 tagPollTxTime = 0;
uint64 anchorRespRxTime = 0;
uint64 tof = INVALID_TOF;
double RaRbxDaDb = 0;
double RbyDb = 0;
double RayDa = 0;
uint8 validResp = messageData[VRESP];
uint8 index = RRXT0 + 5*(inst->shortAdd_idx);
if((RTLS_DEMO_MSG_TAG_FINAL == fcode) &&
(inst->rangeNumA[srcAddr[0]&0x7] != messageData[POLL_RNUM])) //Final's range number needs to match Poll's or else discard this message
{
inst->testAppState = TA_RXE_WAIT ; // wait for next frame
break;
}
if((RTLS_DEMO_MSG_ANCH_FINAL == fcode) &&
(((inst->rangeNumAAnc[tof_idx] != messageData[POLL_RNUM]) //Final's range number needs to match Poll's or else discard this message
|| inst->gatewayAnchor) //gateway can ignore the Final (from A1 to A2 exchange)
|| (A3_ANCHOR_ADDR == inst->instanceAddress16))) //A3 does not care about Final from A1 or A0
{
inst->testAppState = TA_RXE_WAIT ; // wait for next frame
break;
}
if (A1_ANCHOR_ADDR == inst->instanceAddress16) //this is A1
{
if(GATEWAY_ANCHOR_ADDR == (srcAddr[0] | ((uint32)(srcAddr[1] << 8)))) //final is from A0
{
//ENABLE TIMER ONLY IF FINAL RECEIVED
inst->instanceTimerEn = 1;
}
}
//output data over USB...
inst->newRangeAncAddress = inst->instanceAddress16;
//if we got the final, maybe the tag did not get our response, so
//we can use other anchors responses/ToF if there are any.. and output..
//but we cannot calculate new range
if(((validResp & (0x1<<(inst->shortAdd_idx))) != 0))
{
// time of arrival of Final message
tagFinalRxTime = dw_event->timeStamp ; //Final's Rx time
/*
#if defined(DEBUG)
printf("FinalRx Timestamp: %4.15e\n", convertdevicetimetosecu(dw_event.timeStamp));
#endif
*/
inst->delayedReplyTime = 0 ;
// times measured at Tag extracted from the message buffer
// extract 40bit times
memcpy(&tagPollTxTime, &(messageData[PTXT]), 5);
memcpy(&anchorRespRxTime, &(messageData[index]), 5);
memcpy(&tagFinalTxTime, &(messageData[FTXT]), 5);
// poll response round trip delay time is calculated as
// (anchorRespRxTime - tagPollTxTime) - (anchorRespTxTime - tagPollRxTime)
Ra = (int64)((anchorRespRxTime - tagPollTxTime) & MASK_40BIT);
Db = (int64)((inst->txu.anchorRespTxTime - inst->tagPollRxTime) & MASK_40BIT);
// response final round trip delay time is calculated as
// (tagFinalRxTime - anchorRespTxTime) - (tagFinalTxTime - anchorRespRxTime)
Rb = (int64)((tagFinalRxTime - inst->txu.anchorRespTxTime) & MASK_40BIT);
Da = (int64)((tagFinalTxTime - anchorRespRxTime) & MASK_40BIT);
RaRbxDaDb = (((double)Ra))*(((double)Rb))
- (((double)Da))*(((double)Db));
RbyDb = ((double)Rb + (double)Db);
RayDa = ((double)Ra + (double)Da);
tof = (int32) ( RaRbxDaDb/(RbyDb + RayDa) );
}
//tag to anchor ranging
if(RTLS_DEMO_MSG_TAG_FINAL == fcode)
{
inst->newRangeTagAddress = srcAddr[0] + ((uint16) srcAddr[1] << 8);
//time-of-flight
inst->tof[inst->newRangeTagAddress & 0x7] = tof;
//calculate all tag - anchor ranges... and report
inst->newRange = instance_calcranges(&inst->tofArray[0], MAX_ANCHOR_LIST_SIZE, TOF_REPORT_T2A, &inst->rxResponseMask);
inst->rxResponseMaskReport = inst->rxResponseMask; //copy the valid mask to report
inst->rxResponseMask = 0;
//we have our range - update the own mask entry...
if(tof != INVALID_TOF) //check the last ToF entry is valid and copy into the current array
{
setTagDist(srcAddr[0], inst->shortAdd_idx); //copy distance from this anchor to the tag into array
inst->rxResponseMask = (0x1 << inst->shortAdd_idx);
inst->tofArray[inst->shortAdd_idx] = tof;
}
inst->newRangeTime = dw_event->uTimeStamp ;
}
else //anchor to anchor ranging
{
inst->newRangeTagAddress = srcAddr[0] + ((uint16) srcAddr[1] << 8);
//time-of-flight
inst->tofAnc[tof_idx] = tof;
}
//reset the response count
if(inst->rxResps[inst->rxRespsIdx] >= 0)
{
inst->rxResps[inst->rxRespsIdx] = -1 * inst->rxResps[inst->rxRespsIdx];
if(inst->rxResps[inst->rxRespsIdx] == 0) //as A0 will have this as 0 when ranging to A1
inst->rxResps[inst->rxRespsIdx] = -1 ;
}
instancesetantennadelays(); //this will update the antenna delay if it has changed
instancesettxpower(); // configure TX power if it has changed
inst->testAppState = TA_RXE_WAIT ; // wait for next frame
}
break; //RTLS_DEMO_MSG_TAG_FINAL
default:
{
//only enable receiver when not using double buffering
inst->testAppState = TA_RXE_WAIT ; // wait for next frame
dwt_setrxaftertxdelay(0);
}
break;
} //end switch (fcode)
if(dw_event->msgu.frame[0] & 0x20)
{
//as we only pass the received frame with the ACK request bit set after the ACK has been sent
instance_getevent(16); //get and clear the ACK sent event
}
} //end else
}
break ; //end of DWT_SIG_RX_OKAY
case DWT_SIG_RX_TIMEOUT :
{
event_data_t* dw_event = instance_getevent(17); //get and clear this event
#if defined(DEBUG)
printf("PD_DATA_TIMEOUT %d\n", inst->previousState) ;
#endif
//Anchor can time out and then need to send response - so will be in TX pending
if(dw_event->type_pend == DWT_SIG_TX_PENDING)
{
inst->testAppState = TA_TX_WAIT_CONF; // wait confirmation
inst->previousState = TA_TXRESPONSE_SENT_TORX ; //wait for TX confirmation of sent response
}
else if(dw_event->type_pend == DWT_SIG_DW_IDLE) //if timed out and back in receive then don't process as timeout
{
inst_processrxtimeout(inst);
}
//else if RX_PENDING then wait for next RX event...
message = 0; //clear the message as we have processed the event
}
break ;
case DWT_SIG_TX_AA_DONE: //ignore this event - just process the rx frame that was received before the ACK response
case 0:
default :
{
if(message) // == DWT_SIG_TX_DONE)
{
inst->done = INST_DONE_WAIT_FOR_NEXT_EVENT;
}
if(inst->done == INST_NOT_DONE_YET) inst->done = INST_DONE_WAIT_FOR_NEXT_EVENT;
}
break;
}
break ; // end case TA_RX_WAIT_DATA
default:
#if defined(DEBUG)
printf("\nERROR - invalid state %d - what is going on??\n", inst->testAppState) ;
#endif
break;
} // end switch on testAppState
/*! ------------------------------------------------------------------------------------------------------------------
* @fn main()
*
* @brief Application entry point.
*
* @param none
*
* @return none
*/
int ssTwrInit(void)
{
/* Reset and initialise DW1000.
* For initialisation, DW1000 clocks must be temporarily set to crystal speed. After initialisation SPI rate can be increased for optimum
* performance. */
int status;
reset_DW1000(); /* Target specific drive of RSTn line into DW1000 low for a period. */
//spi_set_rate_low();
status = dwt_initialise(DWT_LOADUCODE);
if (DWT_SUCCESS != status) printf("API error line %d\r\n",__LINE__);
//spi_set_rate_high();
/* Configure DW1000. See NOTE 6 below. */
status = dwt_configure(&config);
if (DWT_SUCCESS != status) printf("API error line %d\r\n",__LINE__);
// read otp
uint32_t otpVal[0x20];
dwt_otpread(0,otpVal,0x20);
printf("OTP 6: 0x%x\r\n",otpVal[6]);
printf("OTP 7: 0x%x\r\n",otpVal[7]);
printf("OTP x16: 0x%x\r\n",otpVal[0x16]);
printf("OTP x17: 0x%x\r\n",otpVal[0x17]);
/* Apply default antenna delay value. See NOTE 2 below. */
printf("antenna delays: default TX: %d, default RX: %d, evk 16m: %d, evk 64m: %d\r\n",TX_ANT_DLY,RX_ANT_DLY,DWT_RF_DELAY_16M,DWT_RF_DELAY_64M);
tx_delay = TX_ANT_DLY;
rx_delay = RX_ANT_DLY;
dwt_setrxantennadelay(rx_delay);
dwt_settxantennadelay(tx_delay);
/* Set expected response's delay and timeout. See NOTE 1 and 5 below.
* As this example only handles one incoming frame with always the same delay and timeout, those values can be set here once for all. */
dwt_setrxaftertxdelay(POLL_TX_TO_RESP_RX_DLY_UUS);
dwt_setrxtimeout(RESP_RX_TIMEOUT_UUS);
btn = buttons();
printf("%s entering main loop\r\n",__FUNCTION__);
/* Loop forever initiating ranging exchanges. */
while (1)
{
/* Write frame data to DW1000 and prepare transmission. See NOTE 7 below. */
tx_poll_msg[ALL_MSG_SN_IDX] = frame_seq_nb;
status = dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_TXFRS);
if (DWT_SUCCESS != status) printf("API error line %d\r\n",__LINE__);
status = dwt_writetxdata(sizeof(tx_poll_msg), tx_poll_msg, 0);
if (DWT_SUCCESS != status) printf("API error line %d\r\n",__LINE__);
status = dwt_writetxfctrl(sizeof(tx_poll_msg), 0);
if (DWT_SUCCESS != status) printf("API error line %d\r\n",__LINE__);
/* Start transmission, indicating that a response is expected so that reception is enabled automatically after the frame is sent and the delay
* set by dwt_setrxaftertxdelay() has elapsed. */
status = dwt_starttx(DWT_START_TX_IMMEDIATE | DWT_RESPONSE_EXPECTED);
if (DWT_SUCCESS != status) printf("API error line %d\r\n",__LINE__);
/* We assume that the transmission is achieved correctly, poll for reception of a frame or error/timeout. See NOTE 8 below. */
while (!((status_reg = dwt_read32bitreg(SYS_STATUS_ID)) & (SYS_STATUS_RXFCG | SYS_STATUS_ALL_RX_ERR)))
{ } ; // printf("Waiting. status reg 0x%x\r\n",status_reg); };
//printf("Status reg now 0x%x\r\n",status_reg);
if (SYS_STATUS_RXRFTO & status_reg)
printf("RX timeout\r\n");
/* Increment frame sequence number after transmission of the poll message (modulo 256). */
frame_seq_nb++;
if (status_reg & SYS_STATUS_RXFCG)
{
uint32 frame_len;
//printf("Check RX\r\n");
/* Clear good RX frame event in the DW1000 status register. */
dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_RXFCG);
/* A frame has been received, read it into the local buffer. */
frame_len = dwt_read32bitreg(RX_FINFO_ID) & RX_FINFO_RXFLEN_MASK;
if (frame_len <= RX_BUF_LEN)
{
dwt_readrxdata(rx_buffer, frame_len, 0);
}
/* Check that the frame is the expected response from the companion "SS TWR responder" example.
* As the sequence number field of the frame is not relevant, it is cleared to simplify the validation of the frame. */
rx_buffer[ALL_MSG_SN_IDX] = 0;
if (memcmp(rx_buffer, rx_resp_msg, ALL_MSG_COMMON_LEN) == 0)
{
uint32 poll_tx_ts, resp_rx_ts, poll_rx_ts, resp_tx_ts;
int32 rtd_init, rtd_resp;
/* Retrieve poll transmission and response reception timestamps. See NOTE 9 below. */
poll_tx_ts = dwt_readtxtimestamplo32();
resp_rx_ts = dwt_readrxtimestamplo32();
/* Get timestamps embedded in response message. */
resp_msg_get_ts(&rx_buffer[RESP_MSG_POLL_RX_TS_IDX], &poll_rx_ts);
resp_msg_get_ts(&rx_buffer[RESP_MSG_RESP_TX_TS_IDX], &resp_tx_ts);
/* Compute time of flight and distance. */
rtd_init = resp_rx_ts - poll_tx_ts;
rtd_resp = resp_tx_ts - poll_rx_ts;
tof = ((rtd_init - rtd_resp) / 2.0) * DWT_TIME_UNITS;
distance = tof * SPEED_OF_LIGHT;
/* Display computed distance on LCD. */
//sprintf(dist_str, "DIST: %3.2f m", distance);
sprintf(dist_str, "%3.2f", distance);
printf("%s\r\n",dist_str);
//lcd_display_str(dist_str);
}
}
else
{
/* Clear RX error events in the DW1000 status register. */
printf("Errors occured. Clearing up\r\n");
dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_ALL_RX_ERR);
}
/* Execute a delay between ranging exchanges. */
//printf("Delay %dms\r\n",RNG_DELAY_MS);
deca_sleep(RNG_DELAY_MS);
// toggle led
ledToggle();
// update antenna
if (buttons() & 1) {
tx_delay -= 10; // >>= 1;
rx_delay -= 10; //>>= 1;
dwt_setrxantennadelay(rx_delay);
dwt_settxantennadelay(tx_delay);
printf("Decreased antenna delay to 0x%x\r\n",tx_delay);
}
if (buttons() & 2) {
tx_delay += 10;
rx_delay += 10;
dwt_setrxantennadelay(rx_delay);
dwt_settxantennadelay(tx_delay);
printf("Increased antenna delay to 0x%x\r\n",tx_delay);
}
}
}
bool DWM1000_Tag::dispatch(Msg& msg) {
PT_BEGIN()
PT_WAIT_UNTIL(msg.is(0, SIG_INIT));
init();
POLL_SEND: {
while (true) {
timeout(1000); // delay between POLL
PT_YIELD_UNTIL(timeout());
/* Write frame data to DW1000 and prepare transmission. See NOTE 7 below. */
tx_poll_msg[ALL_MSG_SN_IDX] = frame_seq_nb;
dwt_writetxdata(sizeof(tx_poll_msg), tx_poll_msg, 0);
dwt_writetxfctrl(sizeof(tx_poll_msg), 0);
/* Start transmission, indicating that a response is expected so that reception is enabled automatically after the frame is sent and the delay
* set by dwt_setrxaftertxdelay() has elapsed. */
LOG<< " Start TXF " << FLUSH;
dwt_starttx(DWT_START_TX_IMMEDIATE | DWT_RESPONSE_EXPECTED);// SEND POLL MSG
dwt_setinterrupt(DWT_INT_TFRS, 0);
dwt_setinterrupt(DWT_INT_RFCG, 1); // enable
clearInterrupt();
_timeoutCounter = 0;
/* We assume that the transmission is achieved correctly, poll for reception of a frame or error/timeout. See NOTE 8 below. */
timeout(10);
PT_YIELD_UNTIL(timeout() || isInterruptDetected()); // WAIT RESP MSG
if (isInterruptDetected())
LOG<< " INTERRUPT DETECTED " << FLUSH;
status_reg = dwt_read32bitreg(SYS_STATUS_ID);
LOG<< HEX <<" SYS_STATUS " << status_reg << FLUSH;
if (status_reg == 0xDEADDEAD) {
init();
} else if (status_reg & SYS_STATUS_RXFCG)
goto RESP_RECEIVED;
else if (status_reg & SYS_STATUS_ALL_RX_ERR) {
if (status_reg & SYS_STATUS_RXRFTO)
INFO(" RX Timeout");
else
INFO(" RX error ");
dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_ALL_RX_ERR); /* Clear RX error events in the DW1000 status register. */
}
}
}
RESP_RECEIVED: {
LOG<< " Received " <<FLUSH;
frame_seq_nb++; /* Increment frame sequence number after transmission of the poll message (modulo 256). */
uint32 frame_len;
/* Clear good RX frame event and TX frame sent in the DW1000 status register. */
dwt_write32bitreg(SYS_STATUS_ID,
SYS_STATUS_RXFCG | SYS_STATUS_TXFRS);
/* A frame has been received, read iCHANGEt into the local buffer. */
frame_len =
dwt_read32bitreg(RX_FINFO_ID) & RX_FINFO_RXFLEN_MASK;
if (frame_len <= RX_BUF_LEN) {
dwt_readrxdata(rx_buffer, frame_len, 0);
}
/* Check that the frame is the expected response from the companion "DS TWR responder" example.
* As the sequence number field of the frame is not relevant, it is cleared to simplify the validation of the frame. */
rx_buffer[ALL_MSG_SN_IDX] = 0;
if (memcmp(rx_buffer, rx_resp_msg, ALL_MSG_COMMON_LEN) == 0) { // CHECK RESP MSG
uint32 final_tx_time;
/* Retrieve poll transmission and response reception timestamp. */
poll_tx_ts = get_tx_timestamp_u64();
resp_rx_ts = get_rx_timestamp_u64();
/* Compute final message transmission time. See NOTE 9 below. */
final_tx_time = (resp_rx_ts
+ (RESP_RX_TO_FINAL_TX_DLY_UUS * UUS_TO_DWT_TIME))
>> 8;
dwt_setdelayedtrxtime(final_tx_time);
/* Final TX timestamp is the transmission time we programmed plus the TX antenna delay. */
final_tx_ts = (((uint64) (final_tx_time & 0xFFFFFFFE)) << 8)
+ TX_ANT_DLY;
/* Write all timestamps in the final message. See NOTE 10 below. */
final_msg_set_ts(&tx_final_msg[FINAL_MSG_POLL_TX_TS_IDX],
poll_tx_ts);
final_msg_set_ts(&tx_final_msg[FINAL_MSG_RESP_RX_TS_IDX],
resp_rx_ts);
final_msg_set_ts(&tx_final_msg[FINAL_MSG_FINAL_TX_TS_IDX],
final_tx_ts);
/* Write and send final message. See NOTE 7 below. */
tx_final_msg[ALL_MSG_SN_IDX] = frame_seq_nb;
dwt_writetxdata(sizeof(tx_final_msg), tx_final_msg, 0);
dwt_writetxfctrl(sizeof(tx_final_msg), 0);
dwt_starttx(DWT_START_TX_DELAYED); // SEND FINAL MSG
/* Poll DW1000 until TX frame sent event set. See NOTE 8 below. */
timeout(10);
PT_YIELD_UNTIL((dwt_read32bitreg(SYS_STATUS_ID) & SYS_STATUS_TXFRS) || timeout());;
/* Clear TXFRS event. */
dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_TXFRS);
/* Increment frame sequence number after transmission of the final message (modulo 256). */
frame_seq_nb++;
} else {
/*! ------------------------------------------------------------------------------------------------------------------
* @fn main()
*
* @brief Application entry point.
*
* @param none
*
* @return none
*/
int ssTwrResp(void)
{
/* Reset and initialise DW1000.
* For initialisation, DW1000 clocks must be temporarily set to crystal speed. After initialisation SPI rate can be increased for optimum
* performance. */
int i;
int status;
reset_DW1000(); /* Target specific drive of RSTn line into DW1000 low for a period. */
//spi_set_rate_low();
dwt_initialise(DWT_LOADUCODE);
//spi_set_rate_high();
/* Configure DW1000. See NOTE 5 below. */
dwt_configure(&config);
uint32_t otpVal[0x20];
dwt_otpread(0,otpVal,0x20);
printf("OTP 6: 0x%x\r\n",otpVal[6]);
printf("OTP 7: 0x%x\r\n",otpVal[7]);
printf("OTP x16: 0x%x\r\n",otpVal[0x16]);
printf("OTP x17: 0x%x\r\n",otpVal[0x17]);
/* Apply default antenna delay value. See NOTE 2 below. */
printf("antenna delays: default TX: %d, default RX: %d, evk 16m: %d, evk 64m: %d\r\n",TX_ANT_DLY,RX_ANT_DLY,DWT_RF_DELAY_16M,DWT_RF_DELAY_64M);
tx_delay = TX_ANT_DLY;
rx_delay = RX_ANT_DLY;
dwt_setrxantennadelay(rx_delay);
dwt_settxantennadelay(tx_delay);
btn = buttons();
printf("%s entering main loop\r\n",__FUNCTION__);
/* Loop forever responding to ranging requests. */
while (1)
{
/* Activate reception immediately. */
dwt_rxenable(0);
/* Poll for reception of a frame or error/timeout. See NOTE 6 below. */
while (!((status_reg = dwt_read32bitreg(SYS_STATUS_ID)) & (SYS_STATUS_RXFCG | SYS_STATUS_ALL_RX_ERR)))
{ } ; //printf("Waiting. status reg 0x%x\r\n",status_reg); };
//printf("Status reg now 0x%x\r\n",status_reg);
if (status_reg & SYS_STATUS_RXFCG)
{
uint32 frame_len;
//printf("Check RX\r\n");
/* Clear good RX frame event in the DW1000 status register. */
dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_RXFCG);
/* A frame has been received, read it into the local buffer. */
frame_len = dwt_read32bitreg(RX_FINFO_ID) & RX_FINFO_RXFL_MASK_1023;
//printf("Frame length %d\r\n",frame_len);
if (frame_len <= RX_BUFFER_LEN)
{
dwt_readrxdata(rx_buffer, frame_len, 0);
}
/*
for (i=0;i<frame_len;i++) {
printf("%x ",rx_buffer[i]);
}
printf("\r\n");
*/
/* Check that the frame is a poll sent by "SS TWR initiator" example.
* As the sequence number field of the frame is not relevant, it is cleared to simplify the validation of the frame. */
rx_buffer[ALL_MSG_SN_IDX] = 0;
if (memcmp(rx_buffer, rx_poll_msg, ALL_MSG_COMMON_LEN) == 0)
{
uint32 resp_tx_time;
//printf("Poll MSG\r\n");
/* Retrieve poll reception timestamp. */
poll_rx_ts = get_rx_timestamp_u64();
//printf("RX timestamp: %lld\r\n",poll_rx_ts);
/* Compute final message transmission time. See NOTE 7 below. */
resp_tx_time = (poll_rx_ts + (POLL_RX_TO_RESP_TX_DLY_UUS * UUS_TO_DWT_TIME)) >> 8;
dwt_setdelayedtrxtime(resp_tx_time);
//printf("TX time: %d\r\n",resp_tx_time);
/* Response TX timestamp is the transmission time we programmed plus the antenna delay. */
resp_tx_ts = (((uint64)(resp_tx_time & 0xFFFFFFFE)) << 8) + TX_ANT_DLY;
//printf("TX timestamp: %lld\r\n",resp_tx_ts);
/* Write all timestamps in the final message. See NOTE 8 below. */
resp_msg_set_ts(&tx_resp_msg[RESP_MSG_POLL_RX_TS_IDX], poll_rx_ts);
resp_msg_set_ts(&tx_resp_msg[RESP_MSG_RESP_TX_TS_IDX], resp_tx_ts);
/* Write and send the response message. See NOTE 9 below. */
tx_resp_msg[ALL_MSG_SN_IDX] = frame_seq_nb;
status = dwt_writetxdata(sizeof(tx_resp_msg), tx_resp_msg, 0);
if (DWT_SUCCESS != status) printf("API error line %d\r\n",__LINE__);
status = dwt_writetxfctrl(sizeof(tx_resp_msg), 0);
if (DWT_SUCCESS != status) printf("API error line %d\r\n",__LINE__);
status = dwt_starttx(DWT_START_TX_DELAYED);
if (DWT_SUCCESS != status) {
printf("API error line %d\r\n",__LINE__);
printf("RX timestamp: %llu\r\n",poll_rx_ts);
printf("TX time: %llu\r\n",((uint64)resp_tx_time) << 8);
printf("TX timestamp: %llu\r\n",resp_tx_ts);
}
// poll only if starttx was OK
if (DWT_SUCCESS == status) {
/* Poll DW1000 until TX frame sent event set. See NOTE 6 below. */
u32 tx_stat;
while (!(tx_stat = dwt_read32bitreg(SYS_STATUS_ID) & SYS_STATUS_TXFRS))
{ }; //printf("Waiting. status reg 0x%x\r\n",tx_stat); }
//printf("After Poll: status reg now 0x%x\r\n",tx_stat);
}
/* Clear TXFRS event. */
dwt_write32bitreg(SYS_STATUS_ID, SYS_STATUS_TXFRS);
/* Increment frame sequence number after transmission of the poll message (modulo 256). */
frame_seq_nb++;
}
}