init_port.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 "44b.h"
#include "typDef.h"

void Port_Init(void)
{     //CAUTION:Follow the configuration order for setting the ports. 
    // 1) setting value 
    // 2) setting control register 
    // 3) configure pull-up resistor.  

    //PORT A GROUP
    //GPA9 ADDR23 ADDR22 ADDR21 ADDR20 ADDR19 ADDR18 ADDR17 ADDR16 ADDR0		      
    //  0,    1,     1,    1,     1,     1,     1,      1,     1,    1
    rPCONA=0x1ff;	
    rPDATA=0x0;
    //PORT B GROUP
    //GPB10  GPB9 nGCS3 nGCS2 nGCS1 GPB5 GPB4 nSRAS nSCAS SCLK SCKE
    //  0,    0,    1,	1,    1,    0,    0,	1,    1,   1,   1	
    rPCONB=0x1Cf;
    
    //PORT C GROUP
    //IISLRCK  IISD0 IISDI IISCLK VD7 VD6 VD5 VD4 nXDACK1 nXDREQ1 GPC10 GPC11 TXD1 RXD1 GPC14 GPC15
    //All input
    //  11      11    11    11    11  11   11  11   11      11     01	01     11   11   01    01
    rPDATC=0x8400;
   // rPCONC=0x5F5FFFFF;	
    rPCONC=0xfffaffff;

    rPUPC=0x33ff;	//should be enabled	
   
    //PORT D GROUP
    //VFRAME VM VLINE VCLK VD3 VD2 VD1 VD0
    //    10,10,   10,	10, 10,	10, 10,	10  
    rPCOND=0xaaaa;	
    rPUPD=0xff;

    //PORT E GROUP
    //PE0:FOUT, PE1:TxD0, PE2:RxD0, GPE3, GPE4, GPE5,GPE6,GPE7, CODECLK   
    //	    10       10,      10,    01  , 01,   01,  01,  01,   10
//    rPCONE=0x2552A;	
    rPCONE=0x255a8;	

    rPUPE=0xff;	
    rPDATE=0X68;

    //PORT F GROUP
    //IICSCL IICSDA  nWAIT nXBACK0 nXDREQ0 GPF5 GPF6 GPF7 GPF8 
    //  10     10      10    10      10     0    0    0    0
   // rPCONF=0x2A;
    rPCONF=0x3ea;

    rPUPF=0xff;

    //PORT G GROUP
    //EINT0 EINT1 EINT2 EINT3 GPG4 GPG5 GPG6 GPG7
    //	  0x0
    //  11      11   11     11   01   01   01   01
    rPDATG=0x0f;
//    rPCONG=0x55FF;
    rPCONG=0x557f; 
    rPUPG=0xf;
    
    rSPUCR=0x7;  //pull-up disable
    rEXTINT=0x22222222;  //All EINT[7:0] will be falling edge triggered.
}