void oneway_anchor_init () {
// Make sure the SPI speed is slow for this function
dw1000_spi_slow();
// Setup callbacks to this ANCHOR
dwt_setcallbacks(anchor_txcallback, anchor_rxcallback);
// Make sure the radio starts off
dwt_forcetrxoff();
// Set the anchor so it only receives data and ack packets
dwt_enableframefilter(DWT_FF_DATA_EN | DWT_FF_ACK_EN);
// // Set the ID and PAN ID for this anchor
uint8_t eui_array[8];
dw1000_read_eui(eui_array);
// dwt_seteui(eui_array);
// dwt_setpanid(POLYPOINT_PANID);
// Automatically go back to receive
dwt_setautorxreenable(TRUE);
// Don't use these
dwt_setdblrxbuffmode(FALSE);
dwt_setrxtimeout(FALSE);
// Load our EUI into the outgoing packet
dw1000_read_eui(pp_anc_final_pkt.ieee154_header_unicast.sourceAddr);
// Need a timer
if (_anchor_timer == NULL) {
_anchor_timer = timer_init();
}
// Init the PRNG for determining when to respond to the tag
raninit(&_prng_state, eui_array[0]<<8|eui_array[1]);
// Make SPI fast now that everything has been setup
dw1000_spi_fast();
// Reset our state because nothing should be in progress if we call init()
_state = ASTATE_IDLE;
}
dw1000_err_e dw1000_anchor_init () {
uint8_t eui_array[8];
// Make sure the radio starts off
dwt_forcetrxoff();
// Set the anchor so it only receives data and ack packets
dwt_enableframefilter(DWT_FF_DATA_EN | DWT_FF_ACK_EN);
// Set the ID and PAN ID for this anchor
dw1000_read_eui(eui_array);
dwt_seteui(eui_array);
dwt_setpanid(POLYPOINT_PANID);
// Automatically go back to receive
dwt_setautorxreenable(TRUE);
// Don't use these
dwt_setdblrxbuffmode(FALSE);
dwt_setrxtimeout(FALSE);
// Don't receive at first
dwt_rxenable(FALSE);
// Load our EUI into the outgoing packet
dw1000_read_eui(pp_anc_final_pkt.ieee154_header_unicast.sourceAddr);
// Need a timer
_ranging_broadcast_timer = timer_init();
// Init the PRNG for determining when to respond to the tag
raninit(&_prng_state, eui_array[0]<<8|eui_array[1]);
// Make SPI fast now that everything has been setup
dw1000_spi_fast();
return DW1000_NO_ERR;
}
int app_dw1000_init (
int HACK_role,
int HACK_EUI,
void (*txcallback)(const dwt_callback_data_t *),
void (*rxcallback)(const dwt_callback_data_t *)
) {
uint32_t devID;
int err;
// Start off DW1000 comms slow
REG(SSI0_BASE + SSI_CR1) = 0;
REG(SSI0_BASE + SSI_CPSR) = 8;
REG(SSI0_BASE + SSI_CR1) |= SSI_CR1_SSE;
// Reset the DW1000...for some reason
dw1000_reset();
// Make sure we can talk to the DW1000
devID = dwt_readdevid();
if (devID != DWT_DEVICE_ID) {
#ifdef DW_DEBUG
printf("Could not read Device ID from the DW1000\r\n");
printf("Possible the chip is asleep...\r\n");
#endif
return -1;
}
// Select which of the three antennas on the board to use
dw1000_choose_antenna(0);
// Init the dw1000 hardware
err = dwt_initialise(DWT_LOADUCODE |
DWT_LOADLDO |
DWT_LOADTXCONFIG |
DWT_LOADXTALTRIM);
if (err != DWT_SUCCESS) {
return -1;
}
// Setup interrupts
// Note: using auto rx re-enable so don't need to trigger on error frames
dwt_setinterrupt(DWT_INT_TFRS |
DWT_INT_RFCG |
DWT_INT_SFDT |
DWT_INT_RFTO |
DWT_INT_RPHE |
DWT_INT_RFCE |
DWT_INT_RFSL |
DWT_INT_RXPTO |
DWT_INT_SFDT, 1);
// Configure the callbacks from the dwt library
dwt_setcallbacks(txcallback, rxcallback);
// Set the parameters of ranging and channel and whatnot
global_ranging_config.chan = 2;
global_ranging_config.prf = DWT_PRF_64M;
global_ranging_config.txPreambLength = DWT_PLEN_64;//DWT_PLEN_4096
// global_ranging_config.txPreambLength = DWT_PLEN_256;
global_ranging_config.rxPAC = DWT_PAC8;
global_ranging_config.txCode = 9; // preamble code
global_ranging_config.rxCode = 9; // preamble code
global_ranging_config.nsSFD = 0;
global_ranging_config.dataRate = DWT_BR_6M8;
global_ranging_config.phrMode = DWT_PHRMODE_EXT; //Enable extended PHR mode (up to 1024-byte packets)
global_ranging_config.smartPowerEn = 1;
global_ranging_config.sfdTO = 64+8+1;//(1025 + 64 - 32);
dwt_configure(&global_ranging_config, 0);//(DWT_LOADANTDLY | DWT_LOADXTALTRIM));
dwt_setsmarttxpower(global_ranging_config.smartPowerEn);
// Configure TX power
{
global_tx_config.PGdly = pgDelay[global_ranging_config.chan];
global_tx_config.power = txPower[global_ranging_config.chan];
dwt_configuretxrf(&global_tx_config);
}
/* All constants same anyway
if(DW1000_ROLE_TYPE == TAG)
dwt_xtaltrim(xtaltrim[0]);
else
dwt_xtaltrim(xtaltrim[ANCHOR_EUI]);
*/
dwt_xtaltrim(xtaltrim[0]);
////TEST 1: XTAL trim calibration
//dwt_configcwmode(global_ranging_config.chan);
//dwt_xtaltrim(8);
//while(1);
//{
// //TEST 2: TX Power level calibration
// uint8_t msg[127] = "The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the l";
// dwt_configcontinuousframemode(0x1000);
// dwt_writetxdata(127, (uint8 *) msg, 0) ;
// dwt_writetxfctrl(127, 0);
// dwt_starttx(DWT_START_TX_IMMEDIATE);
// while(1);
//}
// Configure the antenna delay settings
{
uint16_t antenna_delay;
//Antenna delay not really necessary if we're doing an end-to-end calibration
antenna_delay = 0;
dwt_setrxantennadelay(antenna_delay);
dwt_settxantennadelay(antenna_delay);
//global_tx_antenna_delay = antenna_delay;
//// Shift this over a bit for some reason. Who knows.
//// instance_common.c:508
//antenna_delay = dwt_readantennadelay(global_ranging_config.prf) >> 1;
//if (antenna_delay == 0) {
// printf("resetting antenna delay\r\n");
// // If it's not in the OTP, use a magic value from instance_calib.c
// antenna_delay = ((DWT_PRF_64M_RFDLY/ 2.0) * 1e-9 / DWT_TIME_UNITS);
// dwt_setrxantennadelay(antenna_delay);
// dwt_settxantennadelay(antenna_delay);
//}
//global_tx_antenna_delay = antenna_delay;
//printf("tx antenna delay: %u\r\n", antenna_delay);
}
// // Set the sleep delay. Not sure what this does actually.
// instancesettagsleepdelay(POLL_SLEEP_DELAY, BLINK_SLEEP_DELAY);
// Configure as either a tag or anchor
if (HACK_role == ANCHOR) {
uint8_t eui_array[8];
// Enable frame filtering
dwt_enableframefilter(DWT_FF_DATA_EN | DWT_FF_ACK_EN);
dw1000_populate_eui(eui_array, HACK_EUI);
dwt_seteui(eui_array);
dwt_setpanid(DW1000_PANID);
// We do want to enable auto RX
dwt_setautorxreenable(1);
// Let's do double buffering
dwt_setdblrxbuffmode(0);
// Disable RX timeout by setting to 0
dwt_setrxtimeout(0);
// Go for receiving
dwt_rxenable(0);
} else if (HACK_role == TAG) {
uint8_t eui_array[8];
// Allow data and ack frames
dwt_enableframefilter(DWT_FF_DATA_EN | DWT_FF_ACK_EN);
dw1000_populate_eui(eui_array, HACK_EUI);
dwt_seteui(eui_array);
dwt_setpanid(DW1000_PANID);
// Do this for the tag too
dwt_setautorxreenable(1);
dwt_setdblrxbuffmode(1);
dwt_enableautoack(5 /*ACK_RESPONSE_TIME*/);
// Configure sleep
{
int 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;
}
// 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);
}
}
// Make it fast
REG(SSI0_BASE + SSI_CR1) = 0;
REG(SSI0_BASE + SSI_CPSR) = 2;
REG(SSI0_BASE + SSI_CR1) |= SSI_CR1_SSE;
return 0;
}
// -------------------------------------------------------------------------------------------------------------------
//
// 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()
