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Calculate Rotation Period

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This commit is contained in:
Simon Couball
2020-08-11 23:42:24 +02:00
parent be9b15da45
commit 72c1c5c9d7
1 changed files with 24 additions and 9 deletions
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31
src/main.cpp
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@@ -14,10 +14,10 @@ void configureTimer()
TCNT1 = 0; // reset timer
// non-inverted PWM on ch. A, B and C, mode 10: ph. correct PWM, TOP = ICR1
// TCCR1A = _BV(COM1A1) | _BV(COM1B1) | _BV(COM1C1) | _BV(WGM11);
ICR1 = 640; // TOP = 320, @16Mhz CPU -> 25kHz PWM
OCR1A = 500; // Set duty-cycle
TCCR1B = _BV(WGM13) | _BV(CS10); // prescaler = 1
TCCR1C = _BV(WGM13) | _BV(CS10); // on PIN 9,10,11
ICR1 = 320; // TOP = 320, @16Mhz CPU -> 25kHz PWM
OCR1A = 5; // Set duty-cycle
// Configure Timer 3
// TCCR3A = 0;
// TCNT3 = 0;
@@ -67,19 +67,34 @@ void setup()
void loop()
{
int last = digitalRead(7);
uint8_t tacho_last = 0;
uint8_t tacho_counter = 0;
uint32_t iterator = 0;
uint32_t period = 0;
uint16_t rotations = 0;
while (1) {
int next = digitalRead(7);
iterator++;
if (!last && next) {
uint8_t tacho_current = digitalRead(7);
if (!tacho_last && tacho_current) {
if (tacho_counter == 0) {
tacho_counter = 1;
digitalWrite(2, LOW);
} else {
tacho_counter = 0;
digitalWrite(2, HIGH);
period = iterator;
iterator = 0;
rotations++;
}
} else {
digitalWrite(2, LOW);
}
last = next;
tacho_last = tacho_current;
delayMicroseconds(200);
delayMicroseconds(100);
}
}