library

//*****************************************************************************
// File Name    : ads7828test.c
// 
// Title                : example usage of ADS7828 library functions
// Revision             : 1.0
// Notes                :       
// Target MCU   : Atmel AVR series
// Editor Tabs  : 4
// 
// Revision History:
// When                 Who                     Description of change
// -----------  -----------     -----------------------
// 20-Feb-2004  pstang          Created the program
//*****************************************************************************
 
//----- Include Files ---------------------------------------------------------
#include <avr/io.h>             // include I/O definitions (port names, pin names, etc)
#include <avr/interrupt.h>      // include interrupt support

#include "global.h"             // include our global settings
#include "uart.h"               // include uart function library
#include "rprintf.h"    // include printf function library
#include "timer.h"              // include timer function library (timing, PWM, etc)
#include "vt100.h"              // include VT100 terminal support
#include "i2c.h"                // include i2c support
#include "ads7828.h"    // include ADS7828 support

void ads7828test(void);

//----- Begin Code ------------------------------------------------------------
int main(void)
{
        // initialize our libraries
        // initialize the UART (serial port)
        uartInit();
        uartSetBaudRate(115200);
        // make all rprintf statements use uart for output
        rprintfInit(uartSendByte);
        // initialize the timer system
        timerInit();
        // clear terminal screen
        vt100ClearScreen();
        vt100SetCursorPos(1,1);
        // print a little intro message so we know things are working
        rprintf("\r\nWelcome to ADS7828 test!\r\n");
        
        // run tests
        ads7828test();

        return 0;
}


void ads7828test(void)
{
        u08 i;
        u16 conv=0;

        // initialize i2c function library
        i2cInit();
        i2cSetBitrate(30);

        // initialize
        if(ads7828Init(ADS7828_I2C_ADDR))
        {
                rprintf("ADS7828 detected and initialized!\r\n");
        }
        else
        {
                rprintf("Cannot detect ADS7828!\r\n");
                return;
        }
        
        // use the externally applied voltage on REF pin
        ads7828SetReference(0);
        // or use the internal 2.5V voltage reference
        //ads7828SetReference(1);

        while(1)
        {
                // position cursor
                vt100SetCursorPos(4,1);

                for(i=0; i<8; i++)
                {
                        // convert
                        conv = ads7828Convert(ADS7828_I2C_ADDR, i);
                        // print results
                        rprintf("CH#%d: Conversion result is: %d    \r\n", i, conv-2048);
                }
                // pause between readings
                timerPause(100);
        }
}