ads7828test.c

ATMEL的AVR单片机库文件

//*****************************************************************************
// 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/signal.h>	// include "signal" names (interrupt names)
#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(100);

	// 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);
	}
}