Marlin/buildroot/share/pin_interrupt_test/pin_interrupt_test.ino

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// Search pins uasable for endstop-interupts
// Compile with the same settings you'd use with Marlin.
#if defined(ARDUINO_AVR_MEGA2560) || defined(ARDUINO_AVR_MEGA)
#undef digitalPinToPCICR
#define digitalPinToPCICR(p) ( (((p) >= 10) && ((p) <= 15)) || \
(((p) >= 50) && ((p) <= 53)) || \
(((p) >= 62) && ((p) <= 69)) ? (&PCICR) : ((uint8_t *)0) )
#endif
void setup() {
Serial.begin(9600);
Serial.println("PINs causing interrups are:");
for(int i=2; i<NUM_DIGITAL_PINS; i++){
if( digitalPinToPCICR(i) != NULL || (int)digitalPinToInterrupt(i) != -1 ) {
for (int j= 0; j<NUM_ANALOG_INPUTS; j++){
if(analogInputToDigitalPin(j) == i) {
Serial.print("A");
Serial.print(j);
Serial.print(" = ");
}
}
Serial.print("D");
Serial.println(i);
}
}
Serial.println("Arduino pin numbering!");
}
void loop() {
// put your main code here, to run repeatedly:
}