Kevin Lara - 201110510072 - Microcontroladores - 25/06/2016

#define LED_1 LATA.F0
#define LED_2 LATA.F1

#define TOUCH_KEY_CLICK_INPUT_0 PORTB.F2
#define TOUCH_KEY_CLICK_INPUT_1 PORTA.F2
#define TOUCH_KEY_CLICK_INPUT_2 PORTC.F6
#define TOUCH_KEY_CLICK_INPUT_3 PORTD.F4

#define EVERLOOP while (1)

#define STATE_LOW  0
#define STATE_HIGH 1

#define PUSH_BUTTON_1_2_PRESSED 0
#define PUSH_BUTTON_1_PRESSED   4
#define PUSH_BUTTON_2_PRESSED   8

#define TOUCH_KEY_CLICK_C_PRESSED   4
#define TOUCH_KEY_CLICK_D_PRESSED   8
#define TOUCH_KEY_CLICK_C_D_PRESSED 12

#define DEFAULT_DELAY_MS 100

void initMCU() {
  ADCON0 = 0;
  ADCON1 = 0;

  LATA = 0;
  LATB = 0;
  LATC = 0;
  LATD = 0;

  PORTA = 0;
  PORTB = 0;
  PORTC = 0;
  PORTD = 0;

  TRISA.F0 = 0;
  TRISA.F1 = 0;
  TRISD.F3 = 1;
  TRISD.F2 = 1;

  TOUCH_KEY_CLICK_INPUT_0 = 1;
  TOUCH_KEY_CLICK_INPUT_1 = 1;
  TOUCH_KEY_CLICK_INPUT_2 = 1;
  TOUCH_KEY_CLICK_INPUT_3 = 1;
}

char getTouchKeyClickReading() {
  char reading;

  reading.B0 = TOUCH_KEY_CLICK_INPUT_0;
  reading.B1 = TOUCH_KEY_CLICK_INPUT_1;
  reading.B2 = TOUCH_KEY_CLICK_INPUT_2;
  reading.B3 = TOUCH_KEY_CLICK_INPUT_3;

  return reading;
}

void main() {
  initMCU();

  EVERLOOP {
    switch (getTouchKeyClickReading()) {
      case TOUCH_KEY_CLICK_C_PRESSED:
        LED_1 = LED_1 ? 0 : 1;

        delay_ms(DEFAULT_DELAY_MS);
        break;

      case TOUCH_KEY_CLICK_D_PRESSED:
        LED_2 = LED_2 ? 0 : 1;

        delay_ms(DEFAULT_DELAY_MS);
        break;

      case TOUCH_KEY_CLICK_C_D_PRESSED:
        if (LED_1 == STATE_LOW) {
          LED_1 = STATE_HIGH;
        }

        if (LED_2 == STATE_HIGH) {
          LED_2 = STATE_LOW;
        }

        delay_ms(DEFAULT_DELAY_MS / 2);

        if (LED_1 == STATE_HIGH) {
          LED_1 = STATE_LOW;
        }

        if (LED_2 == STATE_LOW) {
          LED_2 = STATE_HIGH;
        }

        delay_ms(DEFAULT_DELAY_MS / 2);
        break;

      default:
        if (LED_1 == STATE_HIGH && PORTD != PUSH_BUTTON_1_PRESSED) {
          LED_1 = STATE_LOW;
        }

        if (LED_2 == STATE_HIGH && PORTD != PUSH_BUTTON_2_PRESSED) {
          LED_2 = STATE_LOW;
        }
        break;
    }

    switch (PORTD) {
      case PUSH_BUTTON_1_2_PRESSED:
        if (getTouchKeyClickReading() != TOUCH_KEY_CLICK_C_D_PRESSED) {
          if (LED_1 == STATE_LOW) {
            LED_1 = STATE_HIGH;
          }

          if (LED_2 == STATE_LOW) {
            LED_2 = STATE_HIGH;
          }
        }
        break;

      case PUSH_BUTTON_1_PRESSED:
        if (getTouchKeyClickReading() != TOUCH_KEY_CLICK_C_PRESSED) {
          if (LED_1 == STATE_LOW) {
            LED_1 = STATE_HIGH;
          }
        }
        break;

      case PUSH_BUTTON_2_PRESSED:
        if (getTouchKeyClickReading() != TOUCH_KEY_CLICK_D_PRESSED) {
          if (LED_2 == STATE_LOW) {
            LED_2 = STATE_HIGH;
          }
        }
        break;

      default:
        if (LED_1 == STATE_HIGH &&
            getTouchKeyClickReading() != TOUCH_KEY_CLICK_C_PRESSED) {
          LED_1 = STATE_LOW;
        }

        if (LED_2 == STATE_HIGH &&
            getTouchKeyClickReading() != TOUCH_KEY_CLICK_D_PRESSED) {
          LED_2 = STATE_LOW;
        }
        break;
    }
  }
}