ad_convert.c

来自「uccos2的的源码文件」· C语言 代码 · 共 47 行

/****************************************Copyright (c)**************************************************

********************************************************************************************************/
#define  IN_ADCONVERT
#include "S3C2410.h"
#include "ad_convert.h"


/********************************************
*  *funcition:send the converted value to queue
********************************************/
unsigned int read_value(void)
{
	unsigned int ad;

	ad = (unsigned int)rADCDAT0 & 0x3ff;
    return ad;
}


/*******************************************
*  *
*******************************************/
void AD_init(void)
{
	rCLKCON |= 1<<15;					//enable the ADC clock
}

/**********************************************
*  *
**********************************************/
void start_adc(unsigned int chanel)
{
	int i;
   	static int prevCh=-1;
	unsigned int preScaler;

	preScaler = 50000000/ADC_FREQ -1;
   	rADCCON = (1<<14) | (preScaler<<6) | (chanel<<3);			//setup channel
	rADCCON|=0x1;			//start AD convert
	//while(rADCCON & 0x1);	//check if Enable_start is low
    while(rADCCON & 0x1);       //Check if Enable_start is low
    while(!(0x8000&rADCCON));   //Check ECFLG
}

//---------------------------------------end------------------