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[英]Porting FreeRTOS to Arduino MEGA 2560 Rev3 (ATmega2560)
[英]Arduino Mega2560 Set interrupts
嘿即时通讯使用arduino Mega2560。 我想对中断设置触发。 到销53、52、51、50和12,13。
void setup(){
PCICR |= (1 << PCIE0);
PCMSK0 |= (1 << PCINT0);
PCMSK0 |= (1 << PCINT1);
PCMSK0 |= (1 << PCINT2);
PCMSK0 |= (1 << PCINT3);
PCMSK0 |= (1 << PCINT6);
PCMSK0 |= (1 << PCINT7);
}
ISR(PCINT0_vect){
// Code when one of the pins was changed
}
这对我不起作用,有人可以帮忙吗?
经过测试,可以正常工作:
/*
* Connections:
* A0 (PF0) -> PCINT0 (PB0 / 53)
* A1 (PF1) -> PCINT1 (PB1 / 52)
* A2 (PF2) -> PCINT2 (PB2 / 51)
* A3 (PF3) -> PCINT3 (PB3 / 50)
* A4 (PF4) -> PCINT6 (PB6 / 12)
* A5 (PF5) -> PCINT7 (PB7 / 13)
*/
uint8_t pins[] = {A0,A1,A2,A3,A4,A5};
void setup() {
Serial.begin(115200);
// Make PF0-5 outputs:
DDRF = _BV(PF0) | _BV(PF1) | _BV(PF2) | _BV(PF3) | _BV(PF4) | _BV(PF5);
PCICR = _BV(PCIE0);
PCMSK0 = _BV(PCINT0) | _BV(PCINT1) | _BV(PCINT2) | _BV(PCINT3) | _BV(PCINT6) | _BV(PCINT7);
// Arduino sets global interrupts, so we don't have to do it here:
// sei();
}
volatile uint8_t data = 0;
uint8_t last = 0;
uint32_t change_ts = 1000;
uint8_t out_val = 0;
void loop() {
if (data != last) {
Serial.print("Got: "); Serial.println(data, BIN);
last = data;
}
if (change_ts <= millis()) {
change_ts += 1000;
Serial.print(F("Changed to: ")); Serial.println(++out_val, BIN);
PORTF = out_val;
}
}
ISR(PCINT0_vect) {
data = PINB & PCMSK0; // read data and clear unused pins
}
如果您不使用Arduino框架,则必须通过sei()
启用全局中断。 如果您无法从外部看到ISR内部设置的某些变量,则必须使其volatile
。
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