Variable im nichtflüchtigen Speicher

/**************************************************************************

  ucFlashRead

**************************************************************************/

unsigned char ucFlashRead (unsigned int addr)

{

   bit EA_SAVE = EA;                   // Preserve EA

   char code * data pread;             // FLASH read pointer

   unsigned char byte;

   WDT_RESET;

   EA = 0;                             // Disable interrupts

   pread = (char code *) addr;

   byte = *pread;                      // Read the byte

   EA = EA_SAVE;                       // Restore interrupts

   return byte;

}

/**************************************************************************

  vFlashWrite 

**************************************************************************/

void vFlashWrite (unsigned int addr, char byte)

{

   bit EA_SAVE = EA;                   // Preserve EA

   char xdata * data pwrite;           // FLASH write pointer

   WDT_RESET;

   EA = 0;                             // Disable interrupts

   VDM0CN = 0xA0;                      // Enable VDD monitor and high threshold

   RSTSRC = 0x02;                      // Enable VDD monitor as a reset source

   pwrite = (char xdata *) addr;

   FLKEY  = 0xA5;                      // Key Sequence 1

   FLKEY  = 0xF1;                      // Key Sequence 2

   PSCTL |= 0x01;                      // PSWE = 1 which enables writes

   VDM0CN = 0xA0;                      // Enable VDD monitor and high threshold

   RSTSRC = 0x02;                      // Enable VDD monitor as a reset source

   *pwrite = byte;                     // Write the byte

   PSCTL &= ~0x01;                     // PSWE = 0 which disable writes

   EA = EA_SAVE;                       // Restore interrupts

}

/**************************************************************************

  vFlashPageErase

**************************************************************************/

void vFlashPageErase (unsigned int addr)

{

   bit EA_SAVE = EA;                   // Preserve EA

   char xdata * data pwrite;           // FLASH write pointer

   WDT_RESET;

   EA = 0;                             // Disable interrupts

   VDM0CN = 0xA0;                      // Enable VDD monitor and high threshold

   RSTSRC = 0x02;                      // Enable VDD monitor as a reset source

   pwrite = (char xdata *) addr;

   FLKEY  = 0xA5;                      // Key Sequence 1

   FLKEY  = 0xF1;                      // Key Sequence 2

   PSCTL |= 0x03;                      // PSWE = 1; PSEE = 1

   VDM0CN = 0xA0;                      // Enable VDD monitor and high threshold

   RSTSRC = 0x02;                      // Enable VDD monitor as a reset source

   *pwrite = 0;                        // Initiate page erase

   PSCTL &= ~0x03;                     // PSWE = 0; PSEE = 0

   EA = EA_SAVE;                       // Restore interrupts

}