main.c

使用S3C44B0 IIC控制器实现串行EEPROM存储器24C16的数据存储和访问。

#include <string.h>
#include "44b.h"
#include "44blib.h"
#include "def.h"
#include "iic.h"
void Wr24C16(U32 slvAddr,U32 addr,U8 data);
void Rd24C16(U32 slvAddr,U32 addr,U8 *data);
void __irq IicInt(void);

  static U8 data;
void Main()
{       Uart_Init(0,115200);
    Uart_Select(0); //Select UART0//

    Port_Init();
        rINTCON=0x1;
        rEXTINT=0x22222222; //Falling edge mode 
        pISR_IIC=(unsigned)IicInt;
    rINTMSK&=~(BIT_GLOBAL|BIT_IIC);
        rIICCON=(1<<7)|(0<<6)|(1<<5)|(0xf);
    //Enable interrupt, IICCLK=MCLK/16, Enable ACK
    //40Mhz/16/(15+1) = 257Khz
     rIICADD=0xa0;
    
   Wr24C16(0xa0,0xac,0xa8);
  Uart_Printf("wr finished\n ");


   Rd24C16(0xa0,0xac,&data);
  Uart_Printf("read finished\n");


 Uart_Printf("%2x ",data);

   rI_ISPC=0x3ffffff;   //clear IRQ interrupt 

}