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Servo PWM probe for Arduino. Assuming up edge of evey port is aligned.
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const int NPIN = 2; // pin count | |
const int PINS[NPIN] = {2, 3}; // input pins | |
volatile long long t0 = 0, t[2] = {0}; | |
void edge_function(int pin) { | |
byte level = digitalRead(PINS[pin]); | |
if(level && pin == 0) { // react to up edge of only pin 0. | |
t0 = micros(); | |
Serial.print((int)t[0]); | |
Serial.print("\t"); | |
Serial.print((int)t[1]); | |
Serial.println(); | |
} | |
if (!level) { | |
t[pin] = micros() - t0; | |
} | |
} | |
void edge0() { | |
edge_function(0); | |
} | |
void edge1() { | |
edge_function(1); | |
} | |
void setup() { | |
Serial.begin(115200); | |
pinMode(PINS[0], INPUT_PULLUP); | |
pinMode(PINS[1], INPUT_PULLUP); | |
attachInterrupt(digitalPinToInterrupt(PINS[0]), edge0, CHANGE); // only pin 0 need up edge detect. | |
attachInterrupt(digitalPinToInterrupt(PINS[1]), edge1, FALLING); // otherwise just falling edge is needed. | |
} | |
void loop() { | |
// put your main code here, to run repeatedly: | |
} |
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