51单片机正弦波发生器(1～100KHZ) 用DAC0832+定时器中断实现带proteus仿真 -

#define SIN_GLOBAL 1
#include "sin.h"
//正弦波128个采样点寄存数组
code uchar Sin[128] = {
64,67,70,73,76,79,82,85,88,91,94,96,99,102,104,106,
109,111,113,115,117,118,120,121,123,124,125,126,126,
127,127,127,127,127,127,127,126,126,125,124,123,121,
120,118,117,115,113,111,109,106,104,102,99,96,94,91,
88,85,82,79,76,73,70,67,64,60,57,54,51,48,45,42,39,
36,33,31,28,25,23,21,18,16,14,12,10,9,7,6,4,3,2,1,
1,0,0,0,0,0,0,0,1,1,2,3,4,6,7,9,10,12,14,16,18,21,23,
25,28,31,33,36,39,42,45,48,51,54,57,60
};
/**********************************************************
*函数名称：Timer0_init(double timer0Delay)
*函数功能：定时器0初始化
*函数入口：timer0Delay,定时器定时时间,单位为毫秒
*函数出口：无
**********************************************************/
void Timer0_init(double timer0Delay)
{
double time;
double timeTemp;
timer0TH0=0x00;
timer0TL0=0x00;
timeTemp=0x00;
time=(double)(((double)12)/((F_CPU)/1000000));
if(((double)255)*time>timer0Delay)
{
timer0TH0=0x00;
timer0TL0=(uchar)(256ul-timer0Delay/time);
}
else
{
while(timeTemp>timer0Delay)
{
timeTemp+=time;
timer0TH0++;
}
timer0TH0--;
timeTemp=timeTemp-((double)timer0TH0)*time;
timer0TL0=(uchar)(256ul-timeTemp/time);
}
TMOD|=0x01; //GATE=0,TR=1运行;C/T=1,counter,0,timer;01十六进制
TH0=timer0TH0;
TL0=timer0TL0;
TR0=1; //timer0 控制位，为1时启动timer0
ET0=1; //timer0 中断使能
}
/**********************************************************
*函数名称：dac0832_init(void)
*函数功能：D/A转换芯片dac0832初始化
*函数入口：无
*函数出口：无
**********************************************************/
void dac0832_init(void)
{
sinCodeCount=0;
DAC0832=Sin[0];
}
/**********************************************************
*函数名称：writeDAC0832(uchar dacDate)
*函数功能：向D/A转换芯片dac0832数据口写数据
*函数入口：dacDate
*函数出口：无
**********************************************************/
void writeDAC0832(uchar dacDate)
{
DAC0832=dacDate;
}

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