io_port.c

AD7843在ADS1.2环境下的一个驱动程序

#include "44B.h"
#include "IO_Port.h"

/************************* PORTS ****************************/

void IO_PortInit(void)
{	     
    //16bit data bus configuration
      
    //PORT "A" GROUP
    //ADDR24 ADDR23 ADDR22 ADDR21 ADDR20 ADDR19 ADDR18 ADDR17 ADDR16 ADDR0		      
    //  1,     1,	  1,     1,     1,     1,     1,	 1,     1,     1
    rPCONA=0x3ff;

    //PORT "B" GROUP
    //nGCS5 nGCS4 nGCS3 nGCS2 nGCS1 Output Output nSRAS nSCAS SCLK SCKE
    //  1,    1,    1,	  1,    1,    0,     0,	    1,    1,    1,  1
    rPCONB = 0x000007CF;
    rPDATB = 0x07EF;		//Beep Off;
    
    //PORT "C" GROUP
    //Input Input RXD1 TXD1 Input Input Input Input VD4 VD5 VD6 VD7 Input Input Input Input
    // 00	 00    11	11	 00	   00	 00		00	11	11  11  11    00	00	  00	00
    rPCONC = 0x0f00ff00;
    rPDATC = 0xFFFF;
    rPUPC |= 0xFF0F;

    //PORT "D" GROUP
    //VFRAME VM VLINE VCLK VD3 VD2 VD1 VD0
    //  10,	 10, 10,   10, 10, 10, 10, 10  
    rPCOND = 0x0AAAA;
    rPDATD = 0xFF;
    rPUPD = 0x00;

    //PORT "E" GROUP
    //Input Input Input Input Input output RxD0 TxD0 Input
    //	00    00    00    00    00    01   10    10   00
    rPCONE=0x68;		//GPE3 = LCD ON/OFF;
    rPDATE=0x1FF;		//GPE3 = HIGHT  ->LCD OFF;
    rPUPE=0x1F7;

    //PORT "F" GROUP
    //Output Input Input Output Input Input Input Input Input
    //touch  touch 		 touch
    // 001    000   000   001     00    00    00    00    00
    rPCONF=0x080400;
    rPDATF=0x1FF;
    rPUPF=0x0DF;

    //PORT "G" GROUP
    //Input Input Input Input Input Input Input Input 
    //							          touch
    //  00    00    00    00    00    00    00    00
    rPCONG=0x00;
    rPDATG = 0xFF;
    rPUPG = 0xFF;
    
    rSPUCR=0x3;  //pull-up disable

    rEXTINT=0x22222222;  //All EINT[7:0] will be falling edge triggered.
}