/* Program to generate waveforms using DAC on Wytec EduPad board 
 * The Wytec EduPad board has an MCP4725 two channel DAC on I2C.
 * A sawtooth waveform is generated on channel 0 and a sine wave channel 1.
 *
 * Energia 1.6.10E18
 */


#include <Wire.h>

char SLAVEADDR = 0x60;  // DAC MCP4725 address

void setup() {
    Wire.begin();
}

int i;

void loop() {
        // create a sawtooth waveform
        i++;
        // write to MCP4725 DAC through I2C
        Wire.beginTransmission(SLAVEADDR);  // start talking to DAC
        Wire.write(0x40);                   // send command
        Wire.write(i >> 4) & 0xFF;          // send high byte data
        Wire.write(i << 4) & 0xFF;          // send low byte data
        Wire.endTransmission();             // stop
}