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Working Example for DAC output using MAX517

 
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sonicdeejay



Joined: 20 Dec 2005
Posts: 112

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Working Example for DAC output using MAX517
PostPosted: Fri Feb 24, 2006 5:24 pm     Reply with quote
I took about 2 days to get this DAC up..due to the unnecessary mistake I made.
Hopefully, the following code sample and diagram will save your time of developement......


Sonic Smile
(I am greatful to the gurus who always stay by me for my never ending questions)


You can go to my deveoplement thread for more reading...how I did it..
http://www.ccsinfo.com/forum/viewtopic.php?p=59569#59569

Last edited by sonicdeejay on Fri Feb 24, 2006 6:35 pm; edited 2 times in total
sonicdeejay



Joined: 20 Dec 2005
Posts: 112

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PostPosted: Fri Feb 24, 2006 5:26 pm     Reply with quote
Schematic Diagram




main program

Code:
#include <18F2525.h> // Call for PIC18F2525 Driver
#device ICD=TRUE
#device ADC=10 // Use 10bits ADC
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=16000000) // 16Mhz Crystal is Used

#include <MAX517mod.c>  //Call for MAX517mod.c function

//Start main program
 void main()

{

  while(1)
   {

      output_high(PIN_A0); //LED ON
      write_dac(0xFF);     //DAC output 5V
      delay_ms(5000);    //Delay

      output_low(PIN_A0); //LED OFF
      write_dac(0x00);   //DAC output 0V
      delay_ms(5000);    //Delay
           
   }
   

}



MAX517mod.c (It is same with MAX517.c and the only difference is PIN assignments)

Code:
#ifndef MAX517_SDA

#define MAX517_SDA    PIN_C4  //PIN assignment for PIC18F2525
#define MAX517_CLK    PIN_C3  //PIN assignment for PIC18F2525

#endif

#use i2c(master, sda=MAX517_SDA, scl=MAX517_CLK, FAST)


void write_dac(int data_byte) {

 i2c_start();
 i2c_write(0x58);           // AD0 and AD1 are tied to ground
 i2c_write(0);
 i2c_write(data_byte);      // Send the data to the device
 i2c_stop();
}


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