vin/avr_piano
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fix button interrupt and handling

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Now notes play on the speaker when the buttons are held.
This commit is contained in:
Vineet K 2024-04-19 16:04:29 -04:00 committed by Shokara Kou
parent 3808c19de4
commit e16ce44563
1 changed files with 41 additions and 57 deletions
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98
notes.c
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@ -39,7 +39,39 @@ unsigned short freqs[] = {
FREQ(8000),
};
unsigned char note = 0;
unsigned char buttonpressed = 0;
ISR (PCINT0_vect)
{
// check if any button in the whole port is pressed
for (unsigned char i = 0; i <= 5; i++) {
if (PINB & (1 << i)) {
note = i + 5 + 6;
break;
}
}
}
ISR (PCINT1_vect)
{
// check if any button in the whole port is pressed
for (unsigned char i = 0; i <= 5; i++) {
if (PINC & (1 << i)) {
note = i + 5;
break;
}
}
}
ISR (PCINT2_vect)
{
// check if any button in the whole port is pressed
for (unsigned char i = 3; i <= 7; i++) {
if (PIND & (1 << i)) {
note = i;
break;
}
}
}
int
main(void)
@ -50,10 +82,11 @@ main(void)
DDRD = (1 << P_TX) | (1 << P_SPKR);
// Enabling Pin Change Interrupt for All Buttons
PCMSK0 = 0xFF;
PCMSK1 = 0xFF;
PCMSK2 = ~(1 | (1 << 1) | (1 << 2));
PCICR = (1 << PCIE0) | (1 << PCIE1) | (1 << PCIE2);
PCMSK0 = 0b00111111;
PCMSK1 = 0b00111111;
PCMSK2 = 0b11111000;
// PCICR = (1 << PCIE0) | (1 << PCIE1) | (1 << PCIE2);
PCICR = 1 << PCIE2;
TCCR1A = 0x00; // use timer1 CTC mode
TCCR1B = 1 << WGM12; // already prescaled by 8 in table
@ -62,7 +95,9 @@ main(void)
// Sends Square wave to the Speaker When a Button is Pressed
for (unsigned char n = 0;; n = (n + 1) % 2) {
if (!buttonpressed && n == 0) continue;
//if (((PIND & 0b11111000) | (PINC & 0b00111111) | (PINB & 0b00111111)) == 0)
if ((PIND & 0b11111000) == 0)
continue;
// Prepare Timer/Counter
TCNT1 = 1;
@ -77,54 +112,3 @@ main(void)
TCCR1B &= ~(1 << CS11);
}
}
ISR (PCINT0_vect)
{
// check if any button on any port is pressed
if (PINB | PINC | PIND)
buttonpressed = 1;
else
buttonpressed = 0;
// check if any button in the whole port is pressed
for (unsigned char i = 0; i <= 5; i++) {
if (PINB & (1 << i)) {
note = i;
break;
}
}
}
ISR (PCINT1_vect)
{
// check if any button on any port is pressed
if (PINB | PINC | PIND)
buttonpressed = 1;
else
buttonpressed = 0;
// check if any button in the whole port is pressed
for (unsigned char i = 0; i <= 5; i++) {
if (PINC & (1 << i)) {
note = i;
break;
}
}
}
ISR (PCINT2_vect)
{
// check if any button on any port is pressed
if (PINB | PINC | PIND)
buttonpressed = 1;
else
buttonpressed = 0;
// check if any button in the whole port is pressed
for (unsigned char i = 3; i <= 7; i++) {
if (PIND & (1 << i)) {
note = i;
break;
}
}
}