zz06_adc.c

《dsPIC通用数字信号控制器原理及应用》源码

/******************************************
** 功能描述: ADC测试，将AN15的采样值通过串口发送**
******************************************/
#include "p30f6014.h"
int failmemory[40];
unsigned long int i = 0;
	
void adcinitial()            //ADC初始化
{
	TRISBbits.TRISB15 = 1;
    ADPCFG = 0x7fff;         //端口配置,清0为模拟引脚
    ADCHSbits.CH0SA = 0xf;   //输入通道选择
    ADCON3bits.ADCS = 0x28;  //转换时钟配置
    ADCON1 = 0x00;           //转换触发配置，手动模式
    ADCON2 = 0x00;           //参考电压AVCC，序列禁止
    ADCON1bits.ADON = 1;     //启动ADC模块
	return;
}  
  
void sciinitial()   //SCI初始化
{
	U1MODE=0x8000;  //使能UART，8，N，1
	U1STA=0x0400;   //发送使能
	U1BRG=0X40;     //9600pds@10M*4Xpll
	return;
}    

int main()
{
	INTCON1=0x0000;	
	INTCON2=0x0000;	   //关闭所有中断 	
    adcinitial();
    sciinitial();
	while(1)
	{
        for (i=0;i<200000;i++){}
        ADCON1bits.SAMP = 1;    //启动采样
        for (i=0;i<10;i++){}    //采样等待
        ADCON1bits.SAMP = 0;    //启动转换
	    while (ADCON1bits.DONE==0){}
        i = ADCBUF0;
	    U1TXREG = i>>8;
        while (U1STAbits.TRMT==0){}
        U1TXREG = i;
        while (U1STAbits.TRMT==0){}
	}
}