eint.c

s3c2410IIC程序

/*****************************************
NAME: eint.c
DESC: External interrupt test
HISTORY:
2001.04.03:purnnamu: draft ver 0.0
*****************************************/

#include <string.h>
#include "def.h"
#include "option.h"
#include "2410addr.h"
#include "2410lib.h"
#include "2410slib.h"


void delay(U32 time) 
{
	U32 i;
	for(;time>0;time--)
		for(i=0;i<39;i++);
}


void iicconfig(void)
{     
    rGPEUP  = 0xc000;             //Pull-up disable
    rGPECON = 0xa0000000;         //GPE15:IICSDA , GPE14:IICSCL 
	
	rIICCON  = 0xe0;
	rIICSTAT = 0x10;  
	
    rEINTMASK = 0xffffff; 
    rINTMSK = BIT_ALLMSK;  
    
    Uart_Printf("Config port complete.\n"); 
	Uart_Printf("complete.\n"); 
}

void iicwrite(U8 addr,U8 data)
{        
    rIICSTAT |= 0xc0;
    rIICDS = 0xa0;
    rIICSTAT = 0xf0;
    while(rIICCON != 0xf0);
    
    rIICDS = addr;
	rIICCON = 0xe0;
    while(rIICCON != 0xf0);
    
    rIICDS = data;
	rIICCON = 0xe0;
    while(rIICCON != 0xf0);

    rIICSTAT = 0xd0;
    rIICCON = 0xe0;
    Delay(1); 

	delay(1000);
}

U8 iicread(U8 addr)
{          
    U8 i;
	
    rIICSTAT |= 0xc0;
    rIICDS = 0xa0;
	rIICCON = 0xe0;
    rIICSTAT = 0xf0;

    while(rIICCON != 0xf0);
	rIICDS = addr;   
	rIICCON = 0xe0;

    while(rIICCON != 0xf0);
	rIICDS = 0xa1;
	rIICSTAT = 0xb0;
    rIICCON = 0xe0;
	
	while(rIICCON != 0xf0);
	rIICCON = 0x60;
	while(rIICCON != 0x70);

	i = rIICDS;
    
	rIICSTAT = 0x90;
	rIICCON = 0x60;
	Delay(1); 
	
	return i;
}

void iictest(void)
{
	unsigned int i = 0;
	iicconfig();
	
	Uart_Printf("Write AT24C04....\n");
//	for(i=0;i<256;i++)
//		iicwrite(i,0xaa);
	Uart_Printf("\n\nRead AT24C04....\n");
	for(i=0;i<256;i++)
		Uart_Printf("%x ",iicread(i));
}