// my solution to lesson 3

// Learned so far
// - writing task
// - task scheduling

// Challenge

// Write 2 tasks.
// On to display a led and one where a user can enter a number which delays the blinking

#if CONFIG_FREERTOS_UNICORE
static const BaseType_t app_cpu = 0 ;
#else
static const BaseType_t app_cpu = 1;
#endif

// Pins
static const int led_pin = 2;

int delayTime = 500;

//Our task  blink a led
void toggleLed(void * parameter) {
  while (1) {
    digitalWrite(led_pin, HIGH);
    vTaskDelay(delayTime / portTICK_PERIOD_MS );
    digitalWrite(led_pin, LOW);
    vTaskDelay(delayTime / portTICK_PERIOD_MS);
  }
}

// Our task is to read in a number
void changeBlinkRate(void * parameter) {
  char ch;
  char buff[20];
  int idx = 0;

  memset(buff, 0, 20);
  while (1) {
    //clear the buffer
    if (Serial.available() > 0) {
      ch = Serial.read();
      
           

      if (ch == '\n') {
      
        delayTime = atoi(buff);

        Serial.print("Delay time : "); 
        Serial.println(delayTime); 
        

        // clear buffer
        memset(buff, 0, 20);
        idx = 0 ;
      } else {
        if (idx < 19) {
           
          buff[idx] = ch;

                 
          idx++;
        }
      }
    }
  }
}



void setup() {
  pinMode(led_pin, OUTPUT);
  Serial.begin(9600);
  Serial.println("RW");

  // Task to run forever
  xTaskCreatePinnedToCore(
    toggleLed,    // Function to be called
    "ToggleLed",  // name of the function
    1024,         // stack size
    NULL,         // parameter to pass to the function
    1,            // priority
    NULL,         // task handle
    app_cpu
  );

  // Task to run forever
  xTaskCreatePinnedToCore(
    changeBlinkRate,    // Function to be called
    "ChangeBlinkRate",  // name of the function
    1024,         // stack size
    NULL,         // parameter to pass to the function
    1,            // priority
    NULL,         // task handle
    app_cpu
  );
}

void loop() {
   vTaskDelay(delayTime / portTICK_PERIOD_MS);
}