kopia lustrzana https://github.com/jgromes/RadioLib
116 wiersze
3.3 KiB
C++
116 wiersze
3.3 KiB
C++
/*
|
|
RadioLib STM32WLx Channel Activity Detection Example
|
|
|
|
This example uses STM32WLx to scan the current LoRa
|
|
channel and detect ongoing LoRa transmissions.
|
|
Unlike SX127x CAD, SX126x/STM32WLx can detect any part
|
|
of LoRa transmission, not just the preamble.
|
|
|
|
For default module settings, see the wiki page
|
|
https://github.com/jgromes/RadioLib/wiki/Default-configuration#sx126x---lora-modem
|
|
|
|
For full API reference, see the GitHub Pages
|
|
https://jgromes.github.io/RadioLib/
|
|
*/
|
|
|
|
// include the library
|
|
#include <RadioLib.h>
|
|
|
|
// no need to configure pins, signals are routed to the radio internally
|
|
STM32WLx radio = new STM32WLx_Module();
|
|
|
|
// set RF switch configuration for Nucleo WL55JC1
|
|
// NOTE: other boards may be different!
|
|
// Some boards may not have either LP or HP.
|
|
// For those, do not set the LP/HP entry in the table.
|
|
static const uint32_t rfswitch_pins[] =
|
|
{PC3, PC4, PC5};
|
|
static const Module::RfSwitchMode_t rfswitch_table[] = {
|
|
{STM32WLx::MODE_IDLE, {LOW, LOW, LOW}},
|
|
{STM32WLx::MODE_RX, {HIGH, HIGH, LOW}},
|
|
{STM32WLx::MODE_TX_LP, {HIGH, HIGH, HIGH}},
|
|
{STM32WLx::MODE_TX_HP, {HIGH, LOW, HIGH}},
|
|
END_OF_MODE_TABLE,
|
|
};
|
|
|
|
void setup() {
|
|
Serial.begin(9600);
|
|
|
|
// set RF switch control configuration
|
|
// this has to be done prior to calling begin()
|
|
radio.setRfSwitchTable(rfswitch_pins, rfswitch_table);
|
|
|
|
// initialize STM32WLx with default settings, except frequency
|
|
Serial.print(F("[STM32WLx] Initializing ... "));
|
|
int state = radio.begin(868.0);
|
|
if (state == RADIOLIB_ERR_NONE) {
|
|
Serial.println(F("success!"));
|
|
} else {
|
|
Serial.print(F("failed, code "));
|
|
Serial.println(state);
|
|
while (true);
|
|
}
|
|
|
|
// set the function that will be called
|
|
// when LoRa packet or timeout is detected
|
|
radio.setDio1Action(setFlag);
|
|
|
|
// start scanning the channel
|
|
Serial.print(F("[STM32WLx] Starting scan for LoRa preamble ... "));
|
|
state = radio.startChannelScan();
|
|
if (state == RADIOLIB_ERR_NONE) {
|
|
Serial.println(F("success!"));
|
|
} else {
|
|
Serial.print(F("failed, code "));
|
|
Serial.println(state);
|
|
}
|
|
}
|
|
|
|
// flag to indicate that a packet was detected or CAD timed out
|
|
volatile bool scanFlag = false;
|
|
|
|
// this function is called when a complete packet
|
|
// is received by the module
|
|
// IMPORTANT: this function MUST be 'void' type
|
|
// and MUST NOT have any arguments!
|
|
void setFlag(void) {
|
|
// something happened, set the flag
|
|
scanFlag = true;
|
|
}
|
|
|
|
void loop() {
|
|
// check if the flag is set
|
|
if(scanFlag) {
|
|
// reset flag
|
|
scanFlag = false;
|
|
|
|
// check CAD result
|
|
int state = radio.getChannelScanResult();
|
|
|
|
if (state == RADIOLIB_LORA_DETECTED) {
|
|
// LoRa packet was detected
|
|
Serial.println(F("[STM32WLx] Packet detected!"));
|
|
|
|
} else if (state == RADIOLIB_CHANNEL_FREE) {
|
|
// channel is free
|
|
Serial.println(F("[STM32WLx] Channel is free!"));
|
|
|
|
} else {
|
|
// some other error occurred
|
|
Serial.print(F("[STM32WLx] Failed, code "));
|
|
Serial.println(state);
|
|
|
|
}
|
|
|
|
// start scanning the channel again
|
|
Serial.print(F("[STM32WLx] Starting scan for LoRa preamble ... "));
|
|
state = radio.startChannelScan();
|
|
if (state == RADIOLIB_ERR_NONE) {
|
|
Serial.println(F("success!"));
|
|
} else {
|
|
Serial.print(F("failed, code "));
|
|
Serial.println(state);
|
|
}
|
|
}
|
|
}
|