DAC5574

Hello there,

I used 2 GPIO pins to program DAC5574 but could not make it. I am using VOUTD for voltage output. I am pretty sure I2C code should work. My question is about writing correct slave address, control byte, MS-Byte, and LS-byte to DAC5574:

unsigned char Write_DAC(unsigned char voltagedata)
{
    start()                                          ;
    write1byte(0x98)                                 ; // DAC5574 slave address
    if(check())   write1byte(0x06)             ;      //  check () returns Acknowledge from DAC. if it is true,  write DAC control byte =0x06?
    else          return 0                                ;
    if(check())   write1byte(voltagedata)             ;     //write DAC MS data (any value from 0 ~ 256)
    else          return 0                           ;
    if(check())   write1byte(0xff)             ;     // write LS data (don't care, could be any value, right?)
    else          return 0                           ;
    if(check())   stop()                             ;
    else                                     ;
    return 1                                         ;
}

Please correct me if I am wrong. I appreciate it!

Fred