error: cannot access /dev/ttyUSBx
Al intentar subir el sketch a la placa salta el error: cannot access /dev/ttyUSBx
Informática, Programación y Electrónica
Al intentar subir el sketch a la placa salta el error: cannot access /dev/ttyUSBx
Ejemplo de Avelino Herrera de Máquina de Estados:
Primera aproximación a realizarlo (L.Salas):
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struct Blink { int pin; int timeOn; int timeOff; int estado; unsigned long relojAnt; }; Blink blink1{ 3, 100, 100}; Blink blink2{ 6, 500, 300}; Blink blink3{ 9, 300, 500}; Blink blink4{12, 900, 200}; void setup() { Serial.begin(9600); } void loop() { parpadea(&blink1); parpadea(&blink2); parpadea(&blink3); parpadea(&blink4); } void parpadea(Blink *blink) { if (blink->estado == 0) { // Estado 0: es para inicializar pinMode(blink->pin, OUTPUT); digitalWrite(blink->pin, HIGH); blink->relojAnt = millis(); blink->estado = 1; } else if (blink->estado == 1) { // Estado 1: led on if (millis() - blink->relojAnt > blink->timeOn) { blink->relojAnt = millis(); digitalWrite(blink->pin, LOW); blink->estado = 2; } } else if (blink->estado == 2) { // Estado 2: led off if (millis() - blink->relojAnt > blink->timeOff) { blink->relojAnt = millis(); digitalWrite(blink->pin, HIGH); blink->estado = 1; } } } |
Después del Refactor( Rubén Tejera):
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enum State {Initialize, LedOn, LedOff}; struct Led { int pin; unsigned long timeFrameOn; unsigned long timeFrameOff; State actualState; unsigned long previusClock; }; Led led1{ 3, 100, 100}; Led led2{ 6, 500, 300}; Led led3{ 9, 300, 500}; Led led4{12, 900, 200}; bool isTimeToChangeState(unsigned long previusTime, unsigned long rangeTime){ return millis() - previusTime > rangeTime; } void setPreviusClock(Led *led){ led->previusClock = millis(); } void setState(Led *led, State newState){ led->actualState = newState; } void setPinMode(int pin, bool type){ pinMode(pin, type); } void setDigitalOutput(int pin, int newState){ digitalWrite(pin, newState); } void switchOnLed(Led *led){ setPreviusClock(led); setDigitalOutput(led->pin, HIGH); setState(led, LedOn); } void switchOffLed(Led *led){ setPreviusClock(led); setDigitalOutput(led->pin, LOW); setState(led, LedOff); } void startLed(Led *led){ setPinMode(led->pin, OUTPUT); switchOnLed(led); } void blink(Led *led) { switch ( led->actualState ){ case Initialize: startLed(led); break; case LedOn: if (isTimeToChangeState(led->previusClock, led->timeFrameOn)) { switchOffLed(led); } break; case LedOff: if (isTimeToChangeState(led->previusClock, led->timeFrameOff)) { switchOnLed(led); } break; default: startLed(led); break; } } void setup() { Serial.begin(9600); } void loop() { blink(&led1); blink(&led2); blink(&led3); blink(&led4); } |