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Arduino-USB-HID-RetroJoystickAdapter
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Update 4joy_adapter.ino

This commit is contained in:
Jarno Lehtinen 2018-12-06 22:50:13 +02:00 committed by GitHub
parent 25b9e048b6
commit 7a3594538d
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 36 additions and 17 deletions
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53
C64_4joy_adapter/4joy_adapter.ino
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@ -39,6 +39,8 @@
volatile uint8_t output1;
volatile uint8_t output2;
volatile uint16_t last_interrupt;
volatile uint8_t mode = 0; // 0 = 3-joystick mode, 1 = 4-joystick mode
ISR(INT2_vect, ISR_NAKED) {
asm volatile(
@ -50,7 +52,7 @@ ISR(INT2_vect, ISR_NAKED) {
:: [pin] "I" (_SFR_IO_ADDR(PORTB)));
}
ISR(INT2_vect_part_2) {}
ISR(INT2_vect_part_2) { mode = 1; last_interrupt = TCNT1; }
ISR(INT3_vect, ISR_NAKED) {
asm volatile(
@ -62,7 +64,7 @@ ISR(INT3_vect, ISR_NAKED) {
:: [pin] "I" (_SFR_IO_ADDR(PORTB)));
}
ISR(INT3_vect_part_2) {}
ISR(INT3_vect_part_2) { mode = 1; last_interrupt = TCNT1; }
void setup() {
pinMode(5, INPUT_PULLUP); // pin5 (PC6) is input
@ -76,25 +78,42 @@ void setup() {
EIMSK = B1100; // enable int2 (Bx1xx) and int3 (B1xxx)
//Serial.begin(115200);
TIMSK1 = 0; // disable timer1 interrupts
TCCR1A = 0;
TCCR1B = B00000101; // Timer1, normal mode, prescaler 1024. One tick is 64us.
TCNT1 = 0;
}
uint8_t joy1, joy2, PB, PF, PD, PC, PE;
uint8_t joy1, joy2, PF, PD, PC, PE;
void loop() {
PB = PINB; PF = PINF; PD = PIND; PC = PINC; PE = PINE;
joy1 = 0; joy2 = 0;
if (up1) bitSet(joy1,upC);
if (down1) bitSet(joy1,downC);
if (left1) bitSet(joy1,leftC);
if (right1) bitSet(joy1,rightC);
if (up2) bitSet(joy2,upC);
if (down2) bitSet(joy2,downC);
if (left2) bitSet(joy2,leftC);
if (right2) bitSet(joy2,rightC);
if (fire1) { bitSet(joy1,fire1C); bitSet(joy2,fire1C); }
if (fire2) { bitSet(joy1,fire2C); bitSet(joy2,fire2C); }
output1 = ~joy1; output2 = ~joy2;
//here should be something that updates even if interrupts doesn't trigger
PF = PINF; PD = PIND; PC = PINC; PE = PINE;
joy1 = 0xff; joy2 = 0xff;
if (up1) bitClear(joy1,upC);
if (down1) bitClear(joy1,downC);
if (left1) bitClear(joy1,leftC);
if (right1) bitClear(joy1,rightC);
if (up2) bitClear(joy2,upC);
if (down2) bitClear(joy2,downC);
if (left2) bitClear(joy2,leftC);
if (right2) bitClear(joy2,rightC);
if (fire1) { bitClear(joy1,fire1C); bitClear(joy2,fire1C); }
if (fire2) { bitClear(joy1,fire2C); bitClear(joy2,fire2C); }
if (mode) { bitClear(joy1,0); bitClear(joy2,0); }
/*if (now > 50000) {
bitSet(joy1,0); bitSet(joy2,0);
}*/
output1 = joy1; output2 = joy2;
uint16_t now = TCNT1;
if (mode == 1) {
if ((now - last_interrupt) > 15625) mode = 0; // if there is no select-signal in 1s, fallback to 3-joystick mode
} else {
PORTB = output1; // 3-joystick mode, update repeatedly and only joystick 3
}
//PORTB = output1; // 3-joystick mode, update repeatedly and only joystick 3
//Serial.print(joy1, BIN); Serial.print(" "); Serial.println(joy2, BIN); delay(100);
//Serial.print(mode, BIN); Serial.print(" "); Serial.println(last_interrupt);
//delayMicroseconds(50);
}