library

//*****************************************************************************
// File Name    : ds1631test.c
// 
// Title                : example usage of DS1631 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 "ds1631.h"             // include DS1631 support

void ds1631test(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 DS6131 test!\r\n");
        
        // run tests
        ds1631test();

        return 0;
}


void ds1631test(void)
{
        s16 T=0;

        // initialize i2c function library
        i2cInit();
        i2cSetBitrate(100);

        // initialize
        if(ds1631Init(DS1631_I2C_ADDR))
        {
                rprintf("DS1631 detected and initialized!\r\n");
        }
        else
        {
                rprintf("Cannot detect DS1631!\r\n");
                return;
        }
        
        // set config
        ds1631SetConfig(DS1631_I2C_ADDR, 0x0F);
        // set the temperature limit registers
        ds1631SetTH(DS1631_I2C_ADDR, 35<<8);
        ds1631SetTL(DS1631_I2C_ADDR, 30<<8);
        // read them back for verification
        rprintf("TH is set to: %d\r\n",ds1631GetTH(DS1631_I2C_ADDR)>>8);
        rprintf("TL is set to: %d\r\n",ds1631GetTL(DS1631_I2C_ADDR)>>8);

        while(1)
        {
                // start convert
                ds1631StartConvert(DS1631_I2C_ADDR);
                // wait until done
                // this works but seems to take forever (5-10 seconds)
                //while(!(ds1631GetConfig(DS1631_I2C_ADDR) & DS1631_CONFIG_DONE));
                // 12-bit conversion are only suppored to take this long
                timerPause(750);
                
                // read temp
                T = ds1631ReadTemp(DS1631_I2C_ADDR);


                // Print the raw temperature reading
                rprintf("Raw Temp: %d    ", T);
                // Print the formatted temperature reading
                rprintf("Real Temp is: ");
                rprintfNum(10, 4, TRUE , ' ', T>>8);
                rprintf(".");
                rprintfNum(10, 4, FALSE, '0', (10000*((u32)(T&0x00FF)))/256 );
                rprintf(" degrees C\r\n");

                timerPause(50);
        }
}