dacsine.c

aduc831精典源代码,适合初学者学习

//********************************************************************
//
// Author        : ADI - Apps            www.analog.com/MicroConverter
//
// Date          : May 2002
//
// File          : DACsine.c
//
// Hardware      : ADuC831
//
// Description   : DAC outputs a sine wave 420Hz to DAC0.
//                 Rate calculations assume a crystal value of 11.0592MHz
//********************************************************************

#include <stdio.h> 
#include <ADuC831.h>

sbit LED = 0x0B4;

void main (void)
{
	
	unsigned code values[64][2]={{0x07, 0xFF},{0x08, 0xC8},{0x09, 0x8E},{0x0A, 0x51},{0x0B, 0x0F},
				     			{0x0B, 0xC4},{0x0C, 0x71},{0x0D, 0x12},{0x0D, 0xA7},{0x0E, 0x2E},
			   	     			{0x0E, 0xA5},{0x0F, 0x0D},{0x0F, 0x63},{0x0F, 0xA6},{0x0F, 0xD7},
				     			{0x0F, 0xF5},{0x0F, 0xFF},{0x0F, 0xF5},{0x0F, 0xD7},{0x0F, 0xA6},
				     			{0x0F, 0x63},{0x0F, 0x0D},{0x0E, 0xA5},{0x0E, 0x2E},{0x0D, 0xA7},
				     			{0x0D, 0x12},{0x0C, 0x71},{0x0B, 0xC4},{0x0B, 0x0F},{0x0A, 0x51},
				     			{0x09, 0x8E},{0x08, 0xC8},{0x07, 0xFF},{0x07, 0x36},{0x06, 0x70},
				     			{0x05, 0xAD},{0x04, 0xEF},{0x04, 0x3A},{0x03, 0x8D},{0x02, 0xEC},
				     			{0x02, 0x57},{0x01, 0xD0},{0x01, 0x59},{0x00, 0xF1},{0x00, 0x9B},
								{0x00, 0x58},{0x00, 0x27},{0x00, 0x09},{0x00, 0x00},{0x00, 0x09},
								{0x00, 0x27},{0x00, 0x58},{0x00, 0x9B},{0x00, 0xF1},{0x01, 0x59},
								{0x01, 0xD0},{0x02, 0x57},{0x02, 0xEC},{0x03, 0x8D},{0x04, 0x3A},
								{0x04, 0xEF},{0x05, 0xAD},{0x06, 0x70},{0x07, 0x36}};
	
    DACCON = 0x0D;	   //DAC0 on 12-bit Asynchronous
                      
    DAC0H = 0x08;			//DAC0 mid scale
    DAC0L = 0x00;

	while (1)
	{
		int i;
		for ( i = 0 ; i < 64; i++)
		{
			DAC0H = values[i][0];
			DAC0L = values[i][1];
		}
		LED ^= 1;
	}
}