Camera trigger code cleanup and moving radio transmission to ISR

Samo Penic

2022-05-18 5e844b869fd9f96f333f712311974984da758443

 firmware/accelerometer_nrf24/accelerometer_nrf24.ino

@@ -14,61 +14,43 @@
#define OUT_TRIGGER 16


//RF24 radio(2, 4); // CE, CSN
//RF24 radio(2, 4); // CE, CSN // This is for alternative wiring.
RF24 radio(22, 21); // CE, CSN

const byte address[6] = {'R','E','C','V', '1'};
const byte address[6] = {'R','E','C','V', '1'}; // Do not change this address.
char dataToSend[4] = "TRG";

void IRAM_ATTR isr() {
//    detachInterrupt(digitalPinToInterrupt(IN_TRIGGER));
    digitalWrite(OUT_TRIGGER, LOW);
    radio.write( &dataToSend, 4 );
    long time=micros();
    while(micros()-time<4000);
    while(micros()-time<5000);
    digitalWrite(OUT_TRIGGER,HIGH);
//        radio.write( &dataToSend, sizeof(dataToSend) );

//    attachInterrupt(digitalPinToInterrupt(IN_TRIGGER), isr, RISING);
  
}



void setup() {
  // put your setup code here, to run once:
  
  WiFi.mode(WIFI_OFF);
  btStop();


  radio.begin();
  radio.openWritingPipe(address);
  radio.setPALevel(RF24_PA_MAX);
  radio.setDataRate( RF24_1MBPS );
  radio.setRetries(1,0); // delay, count
  //pinMode(IN_TRIGGER, INPUT_PULLUP);
  pinMode(OUT_TRIGGER, OUTPUT);
  digitalWrite(OUT_TRIGGER,HIGH);
  attachInterrupt(digitalPinToInterrupt(IN_TRIGGER), isr, FALLING);
  Serial.begin(115200);

}

void loop() {
  // put your main code here, to run repeatedly:
//Serial.print(micros());
//Serial.println(": ---> TRG");
//unsigned long start_timer = micros();

//To send the code every 5--6 ms, uncomment this code
/*
radio.write( &dataToSend, 4 );
long time=micros();
    while(micros()-time<5000);
//Serial.print(micros());
//Serial.println(": TRG--->");
/*    
unsigned long end_timer = micros();
Serial.print(F(" Time to transmit: "));
      Serial.print(end_timer - start_timer);                 // print the timer result
      Serial.println(F(" us"));
*/
}