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exo01 ok with comments

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hugogogo
2025-03-07 12:31:19 +01:00
parent 444925be21
commit 426c9884cf
1 changed files with 5 additions and 3 deletions
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8
module02/ex01/main.c
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@@ -107,6 +107,8 @@
#define FAST_PWM_TOP_OCR1A_IN_TCCR1A (1<<WGM11 | 1<<WGM10) #define FAST_PWM_TOP_OCR1A_IN_TCCR1A (1<<WGM11 | 1<<WGM10)
#define FAST_PWM_TOP_ICR1_IN_TCCR1B (1<<WGM13 | 1<<WGM12) #define FAST_PWM_TOP_ICR1_IN_TCCR1B (1<<WGM13 | 1<<WGM12)
#define FAST_PWM_TOP_ICR1_IN_TCCR1A (1<<WGM11 | 0<<WGM10) #define FAST_PWM_TOP_ICR1_IN_TCCR1A (1<<WGM11 | 0<<WGM10)
#define INTERRUPT_ENABLE_CHANNEL_A (1 << OCIE1A)
#define INTERRUPT_DISABLE_CHANNEL_A (0 << OCIE1A)
// END MACROS // END MACROS
@@ -139,8 +141,8 @@ int main() {
TCCR1A |= CTC_TOP_OCR1A_IN_TCCR1A; // Table 16-4 : set timer in CTC (Clear Time on Compare) mode TCCR1A |= CTC_TOP_OCR1A_IN_TCCR1A; // Table 16-4 : set timer in CTC (Clear Time on Compare) mode
TCCR1B |= CTC_TOP_OCR1A_IN_TCCR1B; TCCR1B |= CTC_TOP_OCR1A_IN_TCCR1B;
TIMSK1 |= (1 << OCIE1A); // Enable CTC interrupt sei(); // enable global interrupts (https://www.nongnu.org/avr-libc/user-manual/group__avr__interrupts.html#gaad5ebd34cb344c26ac87594f79b06b73)
sei(); // Enable global interrupts TIMSK1 |= INTERRUPT_ENABLE_CHANNEL_A; // 16.11.8 : enables the Timer1 Compare Match A interrupt, this makes the MCU react when OCR1A == TCNT1 by calling TIMER1_COMPA_vect
OCR1A = TIME_MS(PERIOD); // Table 16-4 : set CTC compare value on channel A, the counter is cleared to zero when the counter value (TCNT1) matches the OCR1A register OCR1A = TIME_MS(PERIOD); // Table 16-4 : set CTC compare value on channel A, the counter is cleared to zero when the counter value (TCNT1) matches the OCR1A register
@@ -150,6 +152,6 @@ int main() {
} }
// ISR interrupt macro : https://www.nongnu.org/avr-libc/user-manual/group__avr__interrupts.html // ISR interrupt macro : https://www.nongnu.org/avr-libc/user-manual/group__avr__interrupts.html
ISR(TIMER1_COMPA_vect) { // Table 12-7 : ISR(TIMER1_COMPA_vect) { // Table 12-7 : we select the code for timer 1 on channel A
uart_printstr("Hello World!"); uart_printstr("Hello World!");
} }