ad.c

来自「ucos-II+移植到arm+s3c2410的全套代码」· C语言 代码 · 共 79 行

/***************************************************************************\
	Copyright (c) 2004-2007 [e-mail], All rights reserved.
	by threewter	2004.4.26
\***************************************************************************/
	

/***************************************************************************\
    #说明: s3c44b0 AD接口程序
	----------------------------------  Bug  --------------------------------------

	----------------------------------  TODO list  --------------------------------------

	----------------------------------修正--------------------------------------
	2004-8-12	创建

\***************************************************************************/


/* 陈文华改动过*/



#include "../inc/sys/lib.h"
#include "../inc/drv/AD.h"

#define ADCCON_FLAG		(0x1<<15)

#define ADCCON_ENABLE_START_BYREAD	(0x1<<1)


void init_ADdevice()
{//初始化
	rADCCON=(PRSCVL|ADCCON_ENABLE_START|STDBM|PRSCEN);
}

int GetADresult(int channel)
{   
	rADCCON=ADCCON_ENABLE_START_BYREAD|(channel<<3)|PRSCEN|PRSCVL;
	hudelay(10);
	while(!(rADCCON&ADCCON_FLAG));//转换结束
	return (0x3ff&rADCDAT0);//返回采样值	
}





/*int AD_GetResult(int channel)
{
	rADCDIRCR &= ~ADCDIRCR_AIOSTOP;	//start adc
	rADCDIRCR = ADCDIRCR_ADIN(channel);
	udelay(500);
//	while(!(rADCDIRCR&ADCDIRCR_AIOSTOP));

	return rADCDIRDATA;
}*/

void AD_test(void)
{
	int i,j;

	init_ADdevice();
	printf("\n");
	for(;;){
		float ret;
		printf("\r");
		for(i=0;i<5;i++){
			for(j=0;j<=1;j++)
			{
			ret=GetADresult(i);
			}
			ret=ret*5.0/1024;
			printf("AD%d=%f\t",i, ret);
			OSTimeDly(10);
		}
		OSTimeDly(500);
	}
}