adc.c

ucos2在arm7 s3c44b0x上的移植,在ADS中调试成功

#include "..\inc\Adc.h"
#include "..\ucos_ii\ucos_ii.h"              


void Adc_Init(void)
{
	rCLKCON = rCLKCON | (1<<12);	//控制系统主时钟进入ADC单元模块		
	rADCPSR = 10;		        //ADC转换频率为：(int)(MCLK/(2*(rADCPSR+1))/16)
    rADCCON = 0x20;                 //sleep
}

unsigned short Read_Adc(unsigned char ch)
{
	int i;
        static int prevCh=-1;

     if(prevCh!=ch)
        {
		rADCCON = 0x1|(ch<<2);		//设置AD转换通道
   		for(i=0;i<150;i++);		//最小15uS
	}
	
     rADCCON=0x1|(ch<<2);	        //开始AD转换
	while(rADCCON & 0x1);	        //避免标志FLAG错误
     while(!(rADCCON & 0x40));		//等待AD转换结束
	for(i = 0; i < rADCPSR; i++);	//避免第二次标志FLAG错误
     prevCh=ch;
	return rADCDAT;		        //返回AD转换值
}

void Adc_Int(void)
{
rI_ISPC=BIT_ADC;

}