main.c

PIC读写CF卡的C程序(含原理图)

#include <system.h>
#include "serial.h"
#include "compactflash.h"

#pragma CLOCK_FREQ 20000000

void main()
{
   char i;

    serialInit(129);
    compactFlashInit();

   while(1)
   {
      // Wait for card
      if(!(compactFlashPresent()))
      {
         serialSendString("Waiting for Card...\13\10");
         while(!(compactFlashPresent()));
      }

      // Reset card
      compactFlashReset();

      // Drive Diagnostic
      serialSendString("Diagnosing Drive...\13\10");
      switch(compactFlashDiagnostic())
      {
         case 0x01:
            serialSendString("No");
            break;

         case 0x02:
            serialSendString("Formatter");
            break;

         case 0x03:
            serialSendString("Sector");
            break;

         case 0x04:
            serialSendString("Circuitry");
            break;

         case 0x05:
            serialSendString("Controlling Microprocessor");
            break;

         case 0x80:
            serialSendString("Slave");
            break;
      }

      // Drive Identify
      serialSendString(" Error\13\10Identifing Drive...\13\10Buffersize: ");
      compactFlashClearBuffer();
      compactFlashIdentify();
      compactFlashReadBuffer(44, 2);
      serialSendHex(compactFlashBuffer[0]);
      serialSendHex(compactFlashBuffer[1]);
      serialSendString("h\13\10Serial number: ");
      compactFlashIdentify();
      compactFlashReadBuffer(20, 20);
      for(i = 0; i < 20; i++)
      {
         serialSendChar(compactFlashBuffer[i]);
      }
      serialSendString("\13\10Firmware revision: ");
      compactFlashIdentify();
      compactFlashReadBuffer(26, 8);
      for(i = 0; i < 8; i++)
      {
         serialSendChar(compactFlashBuffer[i]);
      }
      serialSendString("\13\10Model number: ");
      compactFlashIdentify();
      compactFlashReadBuffer(54, 20);
      for(i = 0; i < 40; i++)
      {
         serialSendChar(compactFlashBuffer[i]);
      }

        // CompactFLASH write test     
      serialSendString("\13\10Writing block...");
      compactFlashBuffer[0] = 'H';
      compactFlashBuffer[1] = 'e';
      compactFlashBuffer[2] = 'l';
      compactFlashBuffer[3] = 'l';
      compactFlashBuffer[4] = 'o';
      compactFlashBuffer[5] = ' ';
      compactFlashBuffer[6] = 'W';
      compactFlashBuffer[7] = 'o';
      compactFlashBuffer[8] = 'r';
      compactFlashBuffer[9] = 'l';
      compactFlashBuffer[10] = 'd';
      compactFlashBuffer[11] = '!';
      compactFlashWriteBlock(0, 0, 0);
      compactFlashWriteBuffer(0, 12);
      compactFlashFillBuffer();
      compactFlashClearBuffer();

      // CompactFLASH read test
      serialSendString("\13\10Reading block: ");
      compactFlashReadBlock(0, 0, 0);
      compactFlashReadBuffer(0, 12);
      for(i = 0; i < 12; i++)
      {
         serialSendChar(compactFlashBuffer[i]);
      }

        // just test if it really works!              
      serialSendString("\13\10Write 20 chars:");
      for(i = 0; i < 20; i++)
      {
         compactFlashBuffer[i] = serialReceiveChar();
         serialSendChar(compactFlashBuffer[i]);
      }
      serialSendString("\13\10Writing to CompactFLASH...");
      compactFlashWriteBlock(0, 0, 1);
      compactFlashWriteBuffer(0, 20);
      compactFlashFillBuffer();
      compactFlashClearBuffer();
      serialSendString("\13\10Reading from CompactFLASH...\13\10");
      compactFlashReadBlock(0, 0, 1);
      compactFlashReadBuffer(0, 20);
      for(i = 0; i < 20; i++)
      {
         serialSendChar(compactFlashBuffer[i]);
      }
      serialSendString("\13\10");

      while(compactFlashPresent());
   }
}