exio.c

来自「S3C44B0X全套培训资料及源代码 e008s3c44b0x」· C语言 代码 · 共 79 行

#include "..\startup\44b.h"
#include "..\inc\ExIO.h"

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

int GetADresult(int channel)
{
	rADCCON=(channel<<2)|ADCCON_ENABLE_START;
	Delay(10);
	while(!(rADCCON&ADCCON_FLAG));
	return rADCDAT;
}

void ScanLED(char n[])
{
	int i,temp=0x01;
	for(i=0;i<8;i++){
		EXIO_8255A_PORTB=0xff;
		EXIO_8255A_PORTA=n[i];
		EXIO_8255A_PORTB=~temp;
		temp<<=1;
		Delay(10);
	}
}

void testExIO()
{
	int aa,i;
	char n[]={0x50,0xff,0x88,0x55,0x55,0x55,0x55,0x55};
	init_ADdevice();

	EXIO_8255A_CTRL=0x80;
	EXIO_8255B_CTRL=0x82;	//port B for input

	EXIO_8255A_PORTA=0x55;
	EXIO_8255A_PORTB=0xfe;
	EXIO_8255A_PORTC=0x55;

	EXIO_8255B_PORTA=0x55;
	EXIO_8255B_PORTB=0x0;
	EXIO_8255B_PORTC=0x55;

	Delay(5000);
/*	aa=EXIO_8255B_CTRL;
	aa=EXIO_8255B_CTRL;
	aa=EXIO_8255B_CTRL;
	aa=EXIO_8255B_CTRL;*/
/*	for(;;){
		aa=0x01;
		for(i=0;i<8;i++){
			EXIO_8255A_PORTC=aa;
			aa<<=1;
			ScanLED(n);
			ScanLED(n);
			ScanLED(n);
			ScanLED(n);
		}
	}*/

	for(;;){
		for(i=0;i<10;i++){
			aa=EXIO_8255B_PORTB;
			EXIO_8255A_PORTC=aa;
			ScanLED(n);
		}
		Uart_Printf("AD0=%d\tAD1=%d\tAD2=%d\tAD3=%d\n",GetADresult(0),GetADresult(1),
			GetADresult(2),GetADresult(3));
//		Uart_Printf("AD0=%d\n",GetADresult(0));
//		Delay(1000);
	}

	aa=EXIO_8255A_CTRL;
	aa=EXIO_8255B_CTRL;
}