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[SX127x] Added software timeout when using blocking receive without DIO1 (#566)

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This commit is contained in:
jgromes 2022-09-18 15:07:57 +02:00
parent ffb2c15a50
commit cb5fd16710
1 changed files with 23 additions and 4 deletions
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21
src/modules/SX127x/SX127x.cpp
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@ -208,15 +208,34 @@ int16_t SX127x::receive(uint8_t* data, size_t len) {
state = startReceive(len, RADIOLIB_SX127X_RXSINGLE); state = startReceive(len, RADIOLIB_SX127X_RXSINGLE);
RADIOLIB_ASSERT(state); RADIOLIB_ASSERT(state);
// wait for packet reception or timeout (100 LoRa symbols) // if no DIO1 is provided, use software timeout (100 LoRa symbols, same as hardware timeout)
uint32_t timeout = 0;
if(_mod->getGpio() == RADIOLIB_NC) {
float symbolLength = (float) (uint32_t(1) << _sf) / (float) _bw;
timeout = 100*symbolLength;
}
// wait for packet reception or timeout
uint32_t start = _mod->micros();
while(!_mod->digitalRead(_mod->getIrq())) { while(!_mod->digitalRead(_mod->getIrq())) {
_mod->yield(); _mod->yield();
if(_mod->getGpio() != RADIOLIB_NC) {
// no GPIO pin provided, use software timeout
if(_mod->micros() - start > timeout) {
clearIRQFlags();
return(RADIOLIB_ERR_RX_TIMEOUT);
}
} else {
// GPIO provided, use that
if(_mod->digitalRead(_mod->getGpio())) { if(_mod->digitalRead(_mod->getGpio())) {
clearIRQFlags(); clearIRQFlags();
return(RADIOLIB_ERR_RX_TIMEOUT); return(RADIOLIB_ERR_RX_TIMEOUT);
} }
} }
}
} else if(modem == RADIOLIB_SX127X_FSK_OOK) { } else if(modem == RADIOLIB_SX127X_FSK_OOK) {
// calculate timeout (500 % of expected time-on-air) // calculate timeout (500 % of expected time-on-air)
uint32_t timeout = getTimeOnAir(len) * 5; uint32_t timeout = getTimeOnAir(len) * 5;