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Torben van Hees
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Merge remote-tracking branch 'ChocotovLora/cadmode' into cadmode
merged cadmode
2 parents 55d49c5 + 7c22552 commit bb7c5de

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5 files changed

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-4
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5 files changed

+654
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‎examples/LoRaReceiverCadDemo328p/LoRaReceiverCadDemo328p.ino

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#include <SPI.h>
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#include <LoRa.h>
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#include <avr/sleep.h>
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#include <avr/power.h>
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#include <avr/wdt.h>
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ISR(WDT_vect) {
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}
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volatile bool dio0_rise;
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volatile bool dio1_rise;
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byte dio0_pin = 2;
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byte dio1_pin = 3;
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void setup() {
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// disable ADC
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ADCSRA = 0;
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Serial.begin(9600);
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while (!Serial);
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Serial.println("LoRa Receiver");
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pinMode(dio0_pin, INPUT);
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pinMode(dio1_pin, INPUT);
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// Set sleep to full power down. Only external interrupts or
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// the watchdog timer can wake the CPU!
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set_sleep_mode(SLEEP_MODE_PWR_DOWN);
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// wdt sleep settings:
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// 10.8 Watchdog Timer
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WDTCSR |= 1<<WDCE | 1<<WDE;
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// Table 10-3. Watchdog Timer Prescale Select
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//WDTCSR = 1<<WDP3 | 1<<WDP0; // 8 seconds
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//WDTCSR = 1<<WDP3; // 4 seconds
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//WDTCSR = 1<<WDP2 | 1<<WDP1 | 1<<WDP0; // 2 seconds
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//WDTCSR = 1<<WDP2 | 1<<WDP1; // 1 seconds
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//WDTCSR = 1<<WDP0; // 32 ms
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WDTCSR = 0; // 16 ms
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WDTCSR |= 1<<WDIE;
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// Setup external interrupt INT0 and INT1
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//
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//12.2 Register Description
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//12.2.1 EICRA – External Interrupt Control Register A
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EICRA = 0;
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//EICRA |= (1<<ISC10); // Any logical change on INT1 generates an interrupt request.
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//EICRA |= (1<<ISC00); // Any logical change on INT0 generates an interrupt request.
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EICRA |= 1<<ISC11 | 1<<ISC10; // The rising edge of INT1 generates an interrupt request.
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EICRA |= 1<<ISC01 | 1<<ISC00; // The rising edge of INT0 generates an interrupt request.
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//12.2.2 EIMSK – External Interrupt Mask Register
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EIMSK = 0;
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EIMSK |= (1<<INT1); // Bit 1 – INT1: External Interrupt Request 1 Enable
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EIMSK |= (1<<INT0); // Bit 0 – INT0: External Interrupt Request 0 Enable
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if (!LoRa.begin(915E6)) {
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Serial.println("Starting LoRa failed!");
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while (1);
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}
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LoRa.setPreambleLength(30);
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// initiates the first cadMode
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LoRa.cadMode();
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}
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void go_to_sleep() {
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// reset wdt counter
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wdt_reset();
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//sleep_mode: Put the device into sleep mode, taking care of setting the SE bit before, and clearing it afterwards.
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sleep_mode();
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}
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ISR (INT0_vect){
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dio0_rise = true;
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}
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ISR (INT1_vect){
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dio1_rise = true;
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}
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void parse_packet(){
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// try to parse packet
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int packetSize = LoRa.parsePacket();
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if (packetSize) {
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// received a packet
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Serial.print("Received packet '");
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// read packet
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while (LoRa.available()) {
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Serial.print((char)LoRa.read());
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}
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// print RSSI of packet
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Serial.print("' with RSSI ");
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Serial.println(LoRa.packetRssi());
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}
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}
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void send_message(){
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LoRa.beginPacket();
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LoRa.print("hello");
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LoRa.endPacket();
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}
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void loop() {
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if (LoRa.cadModeActive && dio0_rise){
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// dio0: CadDone
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// dio1: CadDetected
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if (dio1_rise){
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dio0_rise = false;
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dio1_rise = false;
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// prepare radio to receive a single packet
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LoRa.setRxSingle();
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} else {
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// nothing detected: wait before initiating the next cadMode
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// put both radio and microcontroller to sleep
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LoRa.sleep();
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go_to_sleep();
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/*
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// send a message periodically
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static uint16_t send_message_counter{0};
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send_message_counter++;
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if (send_message_counter > 250){
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send_message_counter = 0;
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send_message();
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}
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*/
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dio0_rise = false;
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dio1_rise = false;
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LoRa.cadMode();
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}
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} else if (LoRa.rxSingleMode){
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// dio0: RxDone
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// dio1: RxTimeout
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// only take action if either of the pins went high
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if (dio0_rise || dio1_rise){
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if (dio0_rise){
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parse_packet();
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Serial.flush();
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}
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dio0_rise = false;
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dio1_rise = false;
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LoRa.cadMode();
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}
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}
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go_to_sleep();
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}

‎examples/LoRaReceiverCadDemo328pDIO0/LoRaReceiverCadDemo328pDIO0.ino

Lines changed: 167 additions & 0 deletions
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#include <SPI.h>
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#include <LoRa.h>
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#include <avr/sleep.h>
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#include <avr/power.h>
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#include <avr/wdt.h>
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ISR(WDT_vect) {
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}
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volatile bool dio0_rise;
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//volatile bool dio1_rise;
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byte dio0_pin = 2;
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//byte dio1_pin = 3;
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void setup() {
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// disable ADC
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ADCSRA = 0;
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Serial.begin(9600);
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while (!Serial);
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Serial.println("LoRa Receiver");
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pinMode(dio0_pin, INPUT);
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//pinMode(dio1_pin, INPUT);
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// Set sleep to full power down. Only external interrupts or
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// the watchdog timer can wake the CPU!
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set_sleep_mode(SLEEP_MODE_PWR_DOWN);
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// wdt sleep settings:
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// 10.8 Watchdog Timer
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WDTCSR |= 1<<WDCE | 1<<WDE;
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// Table 10-3. Watchdog Timer Prescale Select
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//WDTCSR = 1<<WDP3 | 1<<WDP0; // 8 seconds
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//WDTCSR = 1<<WDP3; // 4 seconds
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//WDTCSR = 1<<WDP2 | 1<<WDP1 | 1<<WDP0; // 2 seconds
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//WDTCSR = 1<<WDP2 | 1<<WDP1; // 1 seconds
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//WDTCSR = 1<<WDP0; // 32 ms
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WDTCSR = 0; // 16 ms
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WDTCSR |= 1<<WDIE;
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// Setup external interrupt INT0 and INT1
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//
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//12.2 Register Description
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//12.2.1 EICRA – External Interrupt Control Register A
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EICRA = 0;
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//EICRA |= (1<<ISC10); // Any logical change on INT1 generates an interrupt request.
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//EICRA |= (1<<ISC00); // Any logical change on INT0 generates an interrupt request.
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//EICRA |= 1<<ISC11 | 1<<ISC10; // The rising edge of INT1 generates an interrupt request.
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EICRA |= 1<<ISC01 | 1<<ISC00; // The rising edge of INT0 generates an interrupt request.
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//12.2.2 EIMSK – External Interrupt Mask Register
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EIMSK = 0;
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//EIMSK |= (1<<INT1); // Bit 1 – INT1: External Interrupt Request 1 Enable
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EIMSK |= (1<<INT0); // Bit 0 – INT0: External Interrupt Request 0 Enable
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if (!LoRa.begin(915E6)) {
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Serial.println("Starting LoRa failed!");
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while (1);
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}
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LoRa.setPreambleLength(30);
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// initiates the first cadMode
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LoRa.cadMode();
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}
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void go_to_sleep() {
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// reset wdt counter
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wdt_reset();
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//sleep_mode: Put the device into sleep mode, taking care of setting the SE bit before, and clearing it afterwards.
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sleep_mode();
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}
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ISR (INT0_vect){
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dio0_rise = true;
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}
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//ISR (INT1_vect){
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// dio1_rise = true;
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//}
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bool parse_packet(){
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// try to parse packet
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int packetSize = LoRa.parsePacket();
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if (packetSize) {
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// received a packet
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Serial.print("Received packet '");
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// read packet
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while (LoRa.available()) {
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Serial.print((char)LoRa.read());
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}
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// print RSSI of packet
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Serial.print("' with RSSI ");
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Serial.println(LoRa.packetRssi());
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return true;
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}
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return false;
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}
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void send_message(){
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LoRa.beginPacket();
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LoRa.print("hello");
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LoRa.endPacket();
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}
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void loop() {
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if (LoRa.cadModeActive && dio0_rise){
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// dio0: CadDone
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// dio1: CadDetected
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dio0_rise = false;
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// dio1 is not used in this sketch: CadDetected is looked up in RegIrqFlags
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if (LoRa.irqCadDetected()){
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LoRa.receive();
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// these attributes are not really needed in this sketch anymore
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LoRa.cadModeActive = false;
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//LoRa.rxSingleMode = true;
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// sleep a while until RxDone is triggered
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for (uint8_t i = 0; i < 20; i++){
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go_to_sleep();
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if (dio0_rise){
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dio0_rise = false;
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parse_packet();
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Serial.flush();
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break;
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}
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}
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// this idle() solves the problem of the power consumption sometimes staying at 12 mA when
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// a packet couldn't be received
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LoRa.idle();
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LoRa.cadMode();
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} else {
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// nothing detected: wait before initiating the next cadMode
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// put both radio and microcontroller to sleep
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LoRa.sleep();
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go_to_sleep();
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/*
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// send a message periodically
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static uint16_t send_message_counter{0};
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send_message_counter++;
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if (send_message_counter > 250){
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send_message_counter = 0;
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send_message();
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}
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*/
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LoRa.cadMode();
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}
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}
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go_to_sleep();
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}

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