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mod01 ex02 works

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hugo LAMY
2025-03-06 12:15:25 +01:00
parent fd2be66727
commit 9398b623af
3 changed files with 42 additions and 6 deletions
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2
module01/ex01/main.c
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@@ -72,7 +72,7 @@ int main() {
// -> Table 16-4 : use bit WGM12 to set mode ctc
// -> 16.11.2 : bit WGM12 is located in register TCCR1B
TCCR1A |= (1 << COM1A0 ) ; // Enable timer 1 Compare Output channel A in toggle mode
TCCR1A |= (1 << COM1A0); // enable timer 1 Compare Output channel A in toggle mode
// -> Table 14-3 : alternate functions for PORTB1 is OC1A (Timer/Counter1 Output Compare Match A Output)
// -> 14.3.1 : OC1A/PCINT1 – Port B, Bit 1

45
module01/ex02/main.c
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@@ -48,12 +48,47 @@
#define BUTTON1 (D, SW1)
#define BUTTON2 (D, SW2)
// TIME
#define PRESCALE_VALUE 1024
#if (PRESCALE_VALUE == 1)
#define PRESCALE_SET (1 << CS10)
#elif (PRESCALE_VALUE == 8)
#define PRESCALE_SET (1 << CS11)
#elif (PRESCALE_VALUE == 64)
#define PRESCALE_SET (1 << CS10) | (1 << CS11)
#elif (PRESCALE_VALUE == 256)
#define PRESCALE_SET (1 << CS12)
#elif (PRESCALE_VALUE == 1024)
#define PRESCALE_SET (1 << CS10) | (1 << CS12)
#endif
#define TIME_MS(ms) (((F_CPU / PRESCALE_VALUE) * ms) / 1000)
#define PERIOD 1000
#define DUTY_CYCLE 10
// END MACROS
int main()
{
MODE_OUTPUT(LED1);
SET_ELEM(LED1);
return 0;
int main() {
MODE_OUTPUT(LED2);
// Table 16-4 : set timer in Fast PWM (Pulse With Modulation) mode with TOP = ICR1 (Mode 14)
SET(TCCR1A, WGM11);
SET(TCCR1B, WGM12);
SET(TCCR1B, WGM13);
// Table 16-2 : Non-inverting mode, the LED will be ON for DUTY_CYCLE% of the time (CLEAR OC1A on compare match, SET OC1A at BOTTOM)
SET(TCCR1A, COM1A1);
// set the period (compare TOP value)
ICR1 = TIME_MS(PERIOD);
// set the duty cycle to DUTY_CYCLE% of the time
OCR1A = TIME_MS(DUTY_CYCLE);
// start the timer with the prescaler
TCCR1B |= (PRESCALE_SET);
while(1) {
continue;
}
}