uint8_t radio_isr() {
PORT_TIMER_WIDTH capturedTime;
uint8_t irq_status;
// capture the time
capturedTime = radiotimer_getCapturedTime();
// reading IRQ_STATUS causes radio's IRQ pin to go low
irq_status = radio_spiReadReg(RG_IRQ_STATUS);
// start of frame event
if (irq_status & AT_IRQ_RX_START) {
// change state
radio_vars.state = RADIOSTATE_RECEIVING;
if (radio_vars.startFrame_cb!=NULL) {
// call the callback
radio_vars.startFrame_cb(capturedTime);
// kick the OS
return 1;
} else {
while(1);
}
}
// end of frame event
if (irq_status & AT_IRQ_TRX_END) {
// change state
radio_vars.state = RADIOSTATE_TXRX_DONE;
if (radio_vars.endFrame_cb!=NULL) {
// call the callback
radio_vars.endFrame_cb(capturedTime);
// kick the OS
return 1;
} else {
while(1);
}
}
return 0;
}
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);
}
}
void radio_intr_endOfFrame(uint16_t capturedTime) {
radio_vars.endFrame_cb(capturedTime);
}
void radio_intr_startOfFrame(uint16_t capturedTime) {
radio_vars.startFrame_cb(capturedTime);
}
kick_scheduler_t radio_isr() {
volatile PORT_TIMER_WIDTH capturedTime;
uint8_t irq_status0,irq_status1;
// capture the time
capturedTime = radiotimer_getCapturedTime();
// reading IRQ_STATUS
irq_status0 = HWREG(RFCORE_SFR_RFIRQF0);
irq_status1 = HWREG(RFCORE_SFR_RFIRQF1);
IntPendClear(INT_RFCORERTX);
//clear interrupt
HWREG(RFCORE_SFR_RFIRQF0) = 0;
HWREG(RFCORE_SFR_RFIRQF1) = 0;
//STATUS0 Register
// start of frame event
if ((irq_status0 & RFCORE_SFR_RFIRQF0_SFD) == RFCORE_SFR_RFIRQF0_SFD) {
// change state
radio_vars.state = RADIOSTATE_RECEIVING;
if (radio_vars.startFrame_cb!=NULL) {
// call the callback
radio_vars.startFrame_cb(capturedTime);
// kick the OS
return KICK_SCHEDULER;
} else {
while(1);
}
}
//or RXDONE is full -- we have a packet.
if (((irq_status0 & RFCORE_SFR_RFIRQF0_RXPKTDONE) == RFCORE_SFR_RFIRQF0_RXPKTDONE)) {
// change state
radio_vars.state = RADIOSTATE_TXRX_DONE;
if (radio_vars.endFrame_cb!=NULL) {
// call the callback
radio_vars.endFrame_cb(capturedTime);
// kick the OS
return KICK_SCHEDULER;
} else {
while(1);
}
}
//or FIFOP is full -- we have a packet.
if (((irq_status0 & RFCORE_SFR_RFIRQF0_FIFOP) == RFCORE_SFR_RFIRQF0_FIFOP)) {
// change state
radio_vars.state = RADIOSTATE_TXRX_DONE;
if (radio_vars.endFrame_cb!=NULL) {
// call the callback
radio_vars.endFrame_cb(capturedTime);
// kick the OS
return KICK_SCHEDULER;
} else {
while(1);
}
}
//STATUS1 Register
// end of frame event --either end of tx .
if (((irq_status1 & RFCORE_SFR_RFIRQF1_TXDONE) == RFCORE_SFR_RFIRQF1_TXDONE)) {
// change state
radio_vars.state = RADIOSTATE_TXRX_DONE;
if (radio_vars.endFrame_cb!=NULL) {
// call the callback
radio_vars.endFrame_cb(capturedTime);
// kick the OS
return KICK_SCHEDULER;
} else {
while(1);
}
}
return DO_NOT_KICK_SCHEDULER;
}
