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fix percentage error in ex02

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hugo LAMY
2025-03-06 13:11:13 +01:00
parent ea43423716
commit 29687bfdf5
1 changed files with 2 additions and 1 deletions
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3
module01/ex02/main.c
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@@ -64,6 +64,7 @@
#define TIME_MS(ms) (((F_CPU / PRESCALE_VALUE) * ms) / 1000) #define TIME_MS(ms) (((F_CPU / PRESCALE_VALUE) * ms) / 1000)
#define PERIOD 1000 #define PERIOD 1000
#define DUTY_CYCLE 10 #define DUTY_CYCLE 10
#define PERCENT(percent, period) (((float)percent / 100) * period)
// END MACROS // END MACROS
@@ -83,7 +84,7 @@ int main() {
ICR1 = TIME_MS(PERIOD); ICR1 = TIME_MS(PERIOD);
// 16.9.3 : set the duty cycle to DUTY_CYCLE% of the time -> OC1A (alternate function of PORTB1, aka LED2) is cleared when TCNT1 (the counter value) equals OCR1A // 16.9.3 : set the duty cycle to DUTY_CYCLE% of the time -> OC1A (alternate function of PORTB1, aka LED2) is cleared when TCNT1 (the counter value) equals OCR1A
OCR1A = TIME_MS(DUTY_CYCLE); OCR1A = TIME_MS(PERCENT(DUTY_CYCLE, PERIOD));
// start the timer with the prescaler // start the timer with the prescaler
TCCR1B |= (PRESCALE_SET); TCCR1B |= (PRESCALE_SET);