I am trying to test my I2C DAC using the following PIC C language. But there
is no output at all when i used the digital multimeter to test it. The
microcntroller board has went though the functional test.

Is the following sorce code logic flow right? To output a high at the DAC
output pin.

Thank you,
Nicholas

#include<p18f452.h>
#include<i2c.h>

//function prototype
void MAX517(unsigned int channel);

void main(void){

    char data_DAC;

    //init condition
    TRISC = 0X1A;    //Set SDA & SCL as 1. Activate I2C port

    OpenI2C(MASTER, SLEW_ON);    //Initialize I2C module
    SSPADD = 9;    //400KHz Baud clock (9) @16MHz

    while(1){    //Start condition
        data_DAC = 0xFF;
        MAX517(data_DAC);    //Write data to I2C DAC
        }//end of while
}//end of main

void MAX517(unsigned int channel){
StartI2C();                 //Start condition
WriteI2C(0x58);        //Address byte of DAC
AckI2C();                 //Ack
WriteI2C(0x00);       //Command byte
AckI2C();                //Ack
WriteI2C(channel);  //Output Data
AckI2C();               //Ack
StopI2C();             //Stop condition
}//end of MAX517 funtion

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