adc-s3c44b0.c

ucOS下AD实验程序,可以任意更改AD寄存器的地址

#include "..\startup\44b.h"
#include "..\startup\Bitops.h"
#include "ADC-S3C44B0.h"
#include <string.h>


void init_ADdevice()
{
	rADCPSR=20;
	rADCCON=ADCCON_SLEEP;
}

//void __irq BDMA1_Done(void);

int GetADresult(int ch)
{
	int i;
	static int prevCh=-1;
	
	if(prevCh!=ch){
		rADCCON=0x0|(ch<<2); 		//setup channel.
		for(i=0;i<150;i++); 			//min. 15us
	}
	
	rADCCON=ADCCON_ENABLE_START|(ch<<2); 			//Start A/D conversion
	Delay(10);						//To avoid The first FLAG error case,(The START bit is cleared in one ADC clock.)
	
	while(!(rADCCON & 0x40));			//Conversion end.
	for(i=0;i<rADCPSR;i++);			 //To avoid The second FLAG error case,The FLAG will be 1 one ADC clock time ago than the ADC conversion is completed. This is not correct.

	return rADCDAT;
}


void ADTest_Loop()
{
	static int count=0;
	int i;

	count++;
	if(count<50000)
		return;

	count=0;

	Uart_Printf("\r");
	for(i=0;i<7;i++){
		Uart_Printf("%8AD%d=%4.4d",i,GetADresult(i));
		Delay(100);
	}
	
}