/*
 * DAC2
 * Modulate an 8 bit DAC with an arbitrary waveform
 * This does not work right, the DAC output has bad values that are not
 * in the data.
 */

int analogIn1 = 2;            // Analog inputs
int analogIn2 = 3;
int dtime;
int indx = 0;
#define STEPS 768
byte wavetable[STEPS] = {0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 5, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 18, 20, 21, 23, 24, 26, 27, 29, 30, 32, 34, 36, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 72, 74, 76, 78, 80, 83, 85, 87, 89, 91, 94, 96, 98, 100, 103, 105, 107, 109, 112, 114, 116, 118, 120, 122, 125, 127, 129, 131, 133, 135, 137, 139, 141, 143, 145, 147, 148, 150, 152, 154, 155, 157, 159, 160, 162, 164, 165, 167, 168, 169, 171, 172, 173, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 184, 185, 186, 186, 187, 187, 188, 188, 189, 189, 189, 190, 190, 190, 190, 190, 190, 190, 190, 190, 189, 189, 189, 188, 188, 188, 187, 187, 186, 185, 185, 184, 183, 183, 182, 181, 180, 179, 178, 177, 176, 175, 174, 172, 171, 170, 169, 167, 166, 165, 163, 162, 161, 159, 158, 156, 155, 153, 151, 150, 148, 147, 145, 143, 142, 140, 138, 137, 135, 133, 132, 130, 128, 127, 125, 123, 121, 120, 118, 116, 115, 113, 111, 110, 108, 106, 105, 103, 102, 100, 98, 97, 95, 94, 92, 91, 90, 88, 87, 86, 84, 83, 82, 81, 79, 78, 77, 76, 75, 74, 73, 72, 71, 70, 70, 69, 68, 68, 67, 66, 66, 65, 65, 65, 64, 64, 64, 63, 63, 63, 63, 63, 63, 63, 63, 63, 64, 64, 64, 65, 65, 66, 66, 67, 67, 68, 69, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 88, 89, 91, 93, 94, 96, 98, 99, 101, 103, 105, 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126, 128, 131, 133, 135, 137, 139, 141, 144, 146, 148, 150, 153, 155, 157, 159, 162, 164, 166, 168, 170, 173, 175, 177, 179, 181, 184, 186, 188, 190, 192, 194, 196, 198, 200, 202, 204, 206, 208, 210, 212, 214, 216, 217, 219, 221, 223, 224, 226, 227, 229, 230, 232, 233, 235, 236, 237, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 248, 249, 250, 250, 251, 251, 252, 252, 253, 253, 253, 253, 253, 253, 254, 253, 253, 253, 253, 253, 253, 252, 252, 251, 251, 250, 250, 249, 248, 248, 247, 246, 245, 244, 243, 242, 241, 240, 239, 237, 236, 235, 233, 232, 230, 229, 227, 226, 224, 223, 221, 219, 217, 216, 214, 212, 210, 208, 206, 204, 202, 200, 198, 196, 194, 192, 190, 188, 186, 184, 181, 179, 177, 175, 173, 170, 168, 166, 164, 162, 159, 157, 155, 153, 150, 148, 146, 144, 141, 139, 137, 135, 133, 131, 128, 126, 124, 122, 120, 118, 116, 114, 112, 110, 108, 106, 105, 103, 101, 99, 98, 96, 94, 93, 91, 89, 88, 86, 85, 84, 82, 81, 80, 78, 77, 76, 75, 74, 73, 72, 71, 70, 69, 69, 68, 67, 67, 66, 66, 65, 65, 64, 64, 64, 63, 63, 63, 63, 63, 63, 63, 63, 63, 64, 64, 64, 65, 65, 65, 66, 66, 67, 68, 68, 69, 70, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 81, 82, 83, 84, 86, 87, 88, 90, 91, 92, 94, 95, 97, 98, 100, 102, 103, 105, 106, 108, 110, 111, 113, 115, 116, 118, 120, 121, 123, 125, 126, 128, 130, 132, 133, 135, 137, 138, 140, 142, 143, 145, 147, 148, 150, 151, 153, 155, 156, 158, 159, 161, 162, 163, 165, 166, 167, 169, 170, 171, 172, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 183, 184, 185, 185, 186, 187, 187, 188, 188, 188, 189, 189, 189, 190, 190, 190, 190, 190, 190, 190, 190, 190, 189, 189, 189, 188, 188, 187, 187, 186, 186, 185, 184, 184, 183, 182, 181, 180, 179, 178, 177, 176, 175, 173, 172, 171, 169, 168, 167, 165, 164, 162, 160, 159, 157, 155, 154, 152, 150, 148, 147, 145, 143, 141, 139, 137, 135, 133, 131, 129, 127, 125, 122, 120, 118, 116, 114, 112, 109, 107, 105, 103, 100, 98, 96, 94, 91, 89, 87, 85, 83, 80, 78, 76, 74, 72, 69, 67, 65, 63, 61, 59, 57, 55, 53, 51, 49, 47, 45, 43, 41, 39, 37, 36, 34, 32, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 16, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 5, 4, 3, 3, 2, 2, 1, 1, 0, 0, 0, 0, 0};

void setup()
{
  DDRD = 255;		// Set port D to all outputs.
}

void loop()
{
  PORTD = wavetable[indx];
  dtime = (analogRead(analogIn1) + 5) * 8;
  delayMicroseconds(dtime);

  indx++;

  if (indx >= STEPS)
    indx = 0;
}