For info regarding the PING))) check http://arduino.cc/en/Tutorial/Ping?from=Tutorial.UltrasoundSensor.

Hope this helps.
cheers

I was wondering if you might be able to show the schematics of this project. I’m trying to replicate it for an school art project. I will cite all your work of course.

Thank you,
Botzi

wings

wings

Removed & from line 107 and program compiles and runs ok.

Regards,
wings

I haven’t tried these values, but I hope this helps.

Thanks

For defining which wavetable you want to use, you can either use a
digital pin (for 2 different waveforms) , ‘n’ digital pins (for 2^n
different waveforms) or a analog signal with different waveforms
mapped onto it.

If you only use two wavetables, you can use one digital pin for this purpose:

(…)
// … main loop
if (digitalRead(waveSelectorPin) == HIGH)
waveSelector = SINE_WAVE;
else
waveSelector = SQUARE_WAVE;
(…)

If using more than 2 wavetables and you need the digital pins for
other stuff, just use an analog pin.

(…)
// main loop
int waveSelector_analog = analogRead(waveSelectorPin);
if (waveSelector_analog < ANALOG_TOP_SINE)
waveSelector = SINE_WAVE;
else if (waveSelector_analog < ANALOG_TOP_SQUARE)
waveSelector = SQUARE_WAVE;
....
else (waveSelector_analog < ANALOG_TOP_TOOTHSAW)
waveSelector = TOOTHSAW_WAVE;
(...)

The values ANALOG_TOP_TOOTHSAW, ANALOG_TOP_SQUARE, ANALOG_TOP_SINE,
etc , depend on the number of wavetables you use, and how you map them
in the analog signal. for instance, using 3 tables you'll have:
ANALOG_TOP_SINE = 1023/3
ANALOG_TOP_SQUARE = 1023/2
ANALOG_TOP_SINE = 1023/1

so values between [0, 1023/3[ are for sinewave selection, [1023/3,
1023/2[ squarewave selection, and [1023/2, 1023] for toothsaw wave.

(please note that this is one way of doing this.)

Now you should use the 'waveSelector' value on the ISR to select the table:

ISR(TIMER1_OVF_vect)
{
static uint8_t osc = 0;

// Send oscillator output to PWM
OCR1A = osc;

// Update accumulator
phaseAccumulator += phaseIncrement;
index = phaseAccumulator >> 8;

// Read oscillator value for next interrupt
switch(waveSelector)
{
case SQUARE_WAVE:
osc = pgm_read_byte( &squareTable[index] );
break;
case SINE_WAVE:
osc = pgm_read_byte( &squareTable[index] );
break;
….

case TOOTHSAW_WAVE:
osc = pgm_read_byte( &toothsawTable[index] );
break;
}
}

hope this hels,
regards