/* p9_1 Generate sawtooth waveform using DAC MCP4725 with Edubase-V2 board */

#include <Wire.h>

const char SLAVEADDR = 0x60;    /* DAC MCP4725 address */

void setup() {
    Wire.begin();               /* initialize I2C */
}

void loop() {
    static int i;

    i++;                                /* increment i */
    /* write to MCP4725 DAC through I2C */
    Wire.beginTransmission(SLAVEADDR);  /* start talking to DAC */
    Wire.write(0x40);                   /* send write DAC register command */
    Wire.write(i >> 4) & 0xFF;          /* send high byte data (D13-D4) */
    Wire.write(i << 4) & 0xFF;          /* send low byte data (D3-D0) */
    Wire.endTransmission();             /* stop */
}