ErrorDisplay.h

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#ifndef ERROR_DISPLAY_H
#define ERROR_DISPLAY_H
 
#include <Arduino.h>
 
#include "PayloadConfig.h"
#include "pico/multicore.h"
#include "pico/stdlib.h"
 
typedef enum {
  CRITICAL_FAIL = 0,  // no sensors or no storage
  SD_CARD_FAIL,  // triggered if SD card verify function returns false or if an
                 // SD card write fails
  LOW_SENSOR_COUNT,  // triggered for less than 5 sensors verified
  POWER_CYCLED,  // determined based on if there are multiple data files on the
                 // SD card
  NONE           // default state, lowest priority
} Error;
 
class ErrorDisplay {
 private:
  mutex_t error_display_mutex;
  int pin_level;
  Error code;
 
  ErrorDisplay() {
    mutex_init(&error_display_mutex);
    this->pin_level = 1;
    this->code = NONE;
    pinMode(ERROR_PIN_2, OUTPUT);
    pinMode(ERROR_PIN_1, INPUT);
    pinMode(ERROR_PIN_0, INPUT);
  }
 
 public:
  static ErrorDisplay& instance() {
    static ErrorDisplay only_instance;
    return only_instance;
  }
 
  void addCode(Error e) {
    mutex_enter_blocking(&error_display_mutex);
 
    if (e < this->code) {
      this->code = e;
    }
 
    mutex_exit(&error_display_mutex);
  }
 
  void toggle() {
    mutex_enter_blocking(&error_display_mutex);
 
    this->pin_level = !(this->pin_level);
 
    uint8_t display_code = 7 - this->code;  // 0 is highest
 
    if (this->code == Error::NONE) display_code = 0b001;
 
    // digitalWrite(ERROR_PIN_2, this->pin_level && (display_code & 0b100));
    // digitalWrite(ERROR_PIN_1, this->pin_level && (display_code & 0b010));
    // digitalWrite(ERROR_PIN_0, this->pin_level && (display_code & 0b001));
    digitalWrite(ERROR_PIN_2, this->pin_level);
 
    mutex_exit(&error_display_mutex);
  }
};
 
#endif