#include <driver/dac.h>

// Timer0 Configuration Pointer (Handle)
hw_timer_t *Timer0_Cfg = NULL;
// Sine LookUpTable & Index Variable
uint8_t SampleIdx = 0;
uint8_t SampleCount;
uint8_t ModulationCount;
uint8_t ModulationIdx = 0;
const uint8_t on_modulation[] = {230,235,240,245,250,255};
const uint8_t off_modulation[] = {0,0,0,0,0,0};
const uint8_t sineLookupTable[] = {
245, 136, 143, 151, 159, 167, 174, 182,
189, 196, 202, 209, 215, 220, 226, 231,
235, 239, 243, 246, 249, 251, 253, 254,
255, 255, 255, 254, 253, 251, 249, 246,
243, 239, 235, 231, 226, 220, 215, 209,
202, 196, 189, 182, 174, 167, 159, 151,
143, 136, 128, 119, 112, 104, 96, 88,
81, 73, 66, 59, 53, 46, 40, 35,
29, 24, 20, 16, 12, 9, 6, 4,
2, 1, 0, 0, 0, 1, 2, 4,
6, 9, 12, 16, 20, 24, 29, 35,
40, 46, 53, 59, 66, 73, 81, 88,
96, 104, 112, 119};

// The Timer0 ISR Function (Executes Every Timer0 Interrupt Interval)
void IRAM_ATTR Timer0_ISR()
{
  // Send SineTable Values To DAC One By One
  SampleIdx = SampleIdx + 1;
  dac_output_voltage(DAC_CHANNEL_1, sineLookupTable[SampleIdx]);
  //Serial.print(sineLookupTable[SampleIdx++]);
  //Serial.print("\t");
  if(SampleIdx >= 100)
  {
    SampleIdx = 0;
  }
}

void setup() {
  SampleCount = sizeof(sineLookupTable);
  ModulationCount = sizeof(on_modulation);
  Serial.begin(115200);
  Serial.println("START!");
  //Serial.println(sizeof(sineLookupTable));
  Serial.println("Delay Complete!");
  //Serial.println("Hello, ESP32!");
  Timer0_Cfg = timerBegin(0, 80, true);
  timerAttachInterrupt(Timer0_Cfg, &Timer0_ISR, true);
  timerAlarmWrite(Timer0_Cfg, 10, true); //10
  Serial.println("Setup Complete!");
  timerAlarmEnable(Timer0_Cfg);
  //Enable DAC1 Channel's Output
  dac_output_enable(DAC_CHANNEL_1);
  
}

void loop() {
  //Serial.println("Loop");
  // put your main code here, to run repeatedly:
  //delay(10); // this speeds up the simulation
  //Serial.println(sineLookupTable[SampleIdx]);
  //delay(1);
  
  while(true) {
    Serial.println(SampleIdx,DEC);
  }
}