42/42_EXT_03_42chips
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mod04 ex02 done

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hugo LAMY
2025-03-12 15:15:06 +01:00
parent 2625dc0946
commit e29965c502
1 changed files with 2 additions and 13 deletions
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15
module04/ex02/main.c
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@@ -20,7 +20,6 @@
// 13.2.6 : PCMSK2 – Pin Change Mask Register 2 // 13.2.6 : PCMSK2 – Pin Change Mask Register 2
// -> (1 << PCINT20) | (1 << PCINT18) // -> (1 << PCINT20) | (1 << PCINT18)
volatile uint8_t prevPIND; // Store previous state of PIND
volatile uint8_t value = 0; volatile uint8_t value = 0;
void print_binary(int value) { void print_binary(int value) {
@@ -81,20 +80,10 @@ int main() {
PCICR = (1 << PCIE2); // 13.2.4 : enable pin change interrupt, bit PCIE2 for PCINT[23:16], (Table 14-9 : alternates : PD2 - PCINT18, PD4 - PCINT20) PCICR = (1 << PCIE2); // 13.2.4 : enable pin change interrupt, bit PCIE2 for PCINT[23:16], (Table 14-9 : alternates : PD2 - PCINT18, PD4 - PCINT20)
PCMSK2 = (1 << PCINT20) | (1 << PCINT18); // 13.2.6 : enable individual pin chang interrupt PCMSK2 = (1 << PCINT20) | (1 << PCINT18); // 13.2.6 : enable individual pin chang interrupt
prevPIND = PIND;
while(1); while(1);
} }
ISR(PCINT2_vect) { ISR(PCINT2_vect) {
uint8_t currentPIND = PIND; // Read the current state of Port D on_press(SW1, increment_led);
uint8_t changedPins = currentPIND ^ prevPIND; // Find changed bits on_press(SW2, decrement_led);
if (!TEST(changedPins, SW1)) {
on_press(SW1, increment_led);
}
if (!TEST(changedPins, SW1)) {
on_press(SW2, decrement_led);
}
prevPIND = currentPIND;
} }