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| #include <avr/power.h> | |
| #include <avr/sleep.h> | |
| #define CLOCK_PIN SCL | |
| #define OUTPUT_PIN MISO | |
| #define BUTTON_PIN SDA | |
| #define POT_PIN A0 | |
| #define TIMEOUT 4800 | |
| #define IS_STARTUP (counter == 255) | |
| uint8_t counter = 255; | |
| uint8_t data[16]; | |
| bool buttonClicked = false; | |
| inline void disableTimeout() | |
| { | |
| TIMSK1 = 0; | |
| OCR1A = 0; | |
| TCCR1A = 0; | |
| TCCR1B = 0; | |
| } | |
| inline void startTimout(int value) | |
| { | |
| TCCR1A = 0; | |
| TCCR1B = _BV(CS10); | |
| OCR1A = value; | |
| TIMSK1 |= _BV(OCIE1A); | |
| } | |
| void clockFalling() { | |
| disableTimeout(); | |
| if(!IS_STARTUP) | |
| { | |
| digitalWrite(OUTPUT_PIN, !data[counter]); | |
| counter++; | |
| } | |
| attachInterrupt(digitalPinToInterrupt(CLOCK_PIN), clockRising, RISING); | |
| } | |
| void clockRising() { | |
| startTimout(TIMEOUT); | |
| attachInterrupt(digitalPinToInterrupt(CLOCK_PIN), clockFalling, FALLING); | |
| } | |
| void buttonPressed() { | |
| buttonClicked = !digitalRead(BUTTON_PIN); | |
| } | |
| ISR(TIMER1_COMPA_vect) { | |
| disableTimeout(); | |
| digitalWrite(OUTPUT_PIN, HIGH); | |
| if(IS_STARTUP) { | |
| attachInterrupt(digitalPinToInterrupt(BUTTON_PIN), buttonPressed, CHANGE); | |
| buttonClicked = false; | |
| for(uint8_t i = 0; i < 16; i++) { | |
| data[i] = 0; | |
| } | |
| } | |
| counter = 0; | |
| uint8_t value = map(analogRead(POT_PIN), 0, 1023, 0, 256); | |
| for(uint8_t i = 0; i < 8; i++) { | |
| data[i] = value & B10000000; | |
| value <<= 1; | |
| data[i + 8] = buttonClicked; | |
| } | |
| } | |
| void setup() { | |
| pinMode(OUTPUT_PIN, OUTPUT); | |
| digitalWrite(OUTPUT_PIN, HIGH); | |
| pinMode(CLOCK_PIN, INPUT_PULLUP); | |
| pinMode(BUTTON_PIN, INPUT_PULLUP); | |
| attachInterrupt(digitalPinToInterrupt(CLOCK_PIN), clockFalling, FALLING); | |
| //look up!!!!! this will semi brick you arduino | |
| //https://forum.arduino.cc/t/killed-arduino-leonardo-with-power_all_disable/229460/15 | |
| power_all_disable(); | |
| power_timer1_enable(); | |
| power_adc_enable(); | |
| set_sleep_mode(SLEEP_MODE_IDLE); | |
| } | |
| void loop() { | |
| sleep_mode(); | |
| } |
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