void radio_txNow() {
PORT_TIMER_WIDTH val;
// change state
radio_vars.state = RADIOSTATE_TRANSMITTING;
// send packet by pulsing the SLP_TR_CNTL pin
PORT_PIN_RADIO_SLP_TR_CNTL_HIGH();
PORT_PIN_RADIO_SLP_TR_CNTL_LOW();
// The AT86RF231 does not generate an interrupt when the radio transmits the
// SFD, which messes up the MAC state machine. The danger is that, if we leave
// this funtion like this, any radio watchdog timer will expire.
// Instead, we cheat an mimick a start of frame event by calling
// ieee154e_startOfFrame from here. This also means that software can never catch
// a radio glitch by which #radio_txEnable would not be followed by a packet being
// transmitted (I've never seen that).
if (radio_vars.startFrame_cb!=NULL) {
// call the callback
val=radiotimer_getCapturedTime();
radio_vars.startFrame_cb(val);
}
}
/**
\brief The program starts executing here.
*/
int mote_main(void) {
uint8_t i;
// clear local variables
memset(&app_vars,0,sizeof(app_vars_t));
// initialize board
board_init();
GPIO_Configuration();
EXTI_Configuration();
GPIOD->BRR = (uint32_t)GPIO_Pin_2;
#ifdef RADIO_SLEEP
PORT_PIN_RADIO_SLP_TR_CNTL_HIGH();
#ifdef RADIO_SLEEP_IN_RUN_MOdE
while(1);
#endif
board_sleep();
#endif
#ifdef RADIO_TRXOFF
board_sleep();
#endif
// add callback functions radio
radio_setOverflowCb(cb_radioTimerOverflows);
radio_setCompareCb(cb_radioTimerCompare);
radio_setStartFrameCb(cb_startFrame);
radio_setEndFrameCb(cb_endFrame);
// prepare packet
app_vars.packet_len = sizeof(app_vars.packet);
for (i=0;i<app_vars.packet_len;i++) {
app_vars.packet[i] = ID;
}
// start bsp timer
bsp_timer_set_callback(cb_timer);
bsp_timer_scheduleIn(TIMER_PERIOD);
// prepare radio
radio_rfOn();
radio_setFrequency(CHANNEL);
// switch in RX by default
radio_rxEnable();
app_vars.state = APP_STATE_RX;
#ifdef RADIO_RX_ON
leds_all_off();
board_sleep();
#endif
// start by a transmit
app_vars.flags |= APP_FLAG_TIMER;
while (1) {
// sleep while waiting for at least one of the flags to be set
while (app_vars.flags==0x00) {
board_sleep();
}
// handle and clear every flag
while (app_vars.flags) {
if (app_vars.flags & APP_FLAG_START_FRAME) {
// start of frame
switch (app_vars.state) {
case APP_STATE_RX:
// started receiving a packet
leds_error_on();
break;
case APP_STATE_TX:
// started sending a packet
leds_sync_on();
break;
}
// clear flag
app_vars.flags &= ~APP_FLAG_START_FRAME;
}
if (app_vars.flags & APP_FLAG_END_FRAME) {
// end of frame
switch (app_vars.state) {
case APP_STATE_RX:
// done receiving a packet
app_vars.packet_len = sizeof(app_vars.packet);
for (i=0;i<app_vars.packet_len;i++) {
app_vars.packet[i] = 0;
}
// get packet from radio
radio_getReceivedFrame(app_vars.packet,
&app_vars.packet_len,
sizeof(app_vars.packet),
&app_vars.rxpk_rssi,
&app_vars.rxpk_lqi,
&app_vars.rxpk_crc);
leds_error_off();
break;
case APP_STATE_TX:
// done sending a packet
// switch to RX mode
radio_rxEnable();
app_vars.state = APP_STATE_RX;
leds_sync_off();
break;
}
// clear flag
app_vars.flags &= ~APP_FLAG_END_FRAME;
}
if (app_vars.flags & APP_FLAG_TIMER) {
// timer fired
if (app_vars.state==APP_STATE_RX) {
// stop listening
radio_rfOff();
// prepare packet
app_vars.packet_len = sizeof(app_vars.packet);
for (i=0;i<app_vars.packet_len;i++) {
app_vars.packet[i] = ID;
}
// start transmitting packet
radio_loadPacket(app_vars.packet,app_vars.packet_len);
radio_txEnable();
#ifdef RADIO_PLL_ON
leds_all_off();
board_sleep();
#endif
radio_txNow();
#ifdef RADIO_BUSY_TX
leds_all_off();
while(1) { //keep sending
PORT_PIN_RADIO_SLP_TR_CNTL_HIGH();
PORT_PIN_RADIO_SLP_TR_CNTL_LOW();
}
board_sleep();
#endif
app_vars.state = APP_STATE_TX;
}
// clear flag
app_vars.flags &= ~APP_FLAG_TIMER;
}
}
}
}
void board_init() {
uint16_t i,j;
//enable all port clocks.
SIM_SCGC5 |= (SIM_SCGC5_PORTA_MASK
| SIM_SCGC5_PORTB_MASK
| SIM_SCGC5_PORTC_MASK
| SIM_SCGC5_PORTD_MASK
| SIM_SCGC5_PORTE_MASK );
//init all pins for the radio
//SLPTR
#ifdef TOWER_K20
PORTB_PCR3 = PORT_PCR_MUX(1);// -- PTB3 used as gpio for slptr
GPIOB_PDDR |= RADIO_SLPTR_MASK; //set as output
//RADIO RST -- TODO in the TWR change it to another pin! this is one of the leds.
PORTC_PCR9 = PORT_PCR_MUX(1);// -- PTC9 used as gpio for radio rst
GPIOC_PDDR |= RADIO_RST_MASK; //set as output
#elif OPENMOTE_K20
PORTD_PCR4 = PORT_PCR_MUX(1);// -- PTD4 used as gpio for slptr
GPIOD_PDDR |= RADIO_SLPTR_MASK; //set as output
//RADIO RST
PORTD_PCR5 = PORT_PCR_MUX(1);// -- PTD5 used as gpio for radio rst
GPIOD_PDDR |= RADIO_RST_MASK; //set as output
#endif
PORT_PIN_RADIO_RESET_LOW();//activate the radio.
PORT_PIN_RADIO_SLP_TR_CNTL_LOW();
//ptc5 .. ptc5 is pin 62, irq A
enable_irq(RADIO_EXTERNAL_PORT_IRQ_NUM);//enable the irq. The function is mapped to the vector at position 105 (see manual page 69). The vector is in isr.h
//external port radio_isr.
PORTC_PCR5 = PORT_PCR_MUX(1);// -- PTC5 used as gpio for radio isr through llwu
GPIOC_PDDR &= ~1<<RADIO_ISR_PIN; //set as input ==0
PORTC_PCR5 |= PORT_PCR_IRQC(0x09); //9 interrupt on raising edge. page 249 of the manual.
PORTC_PCR5 |= PORT_PCR_ISF_MASK; //clear any pending interrupt.
llwu_init();//low leakage unit init - to recover from deep sleep
debugpins_init();
leds_init();
bsp_timer_init();
uart_init();
radiotimer_init();
spi_init();
radio_init();
leds_all_off();
leds_sync_on();
leds_radio_on();
leds_debug_on();
leds_error_on();
leds_all_off();
debugpins_fsm_clr();
}
