原创 iar 8051 中实现对F530Aflash编程

重点是要产生movx指令

//-----------------------------------------------------------------------------
// FLASH_ByteWrite
//-----------------------------------------------------------------------------
//
// Return Value : None
// Parameters   :
//   1) FLADDR addr - address of the byte to write to
//                    valid range is 0x0000 to 0x3BFF for 16K Flash devices
//                    valid range is 0x0000 to 0x1FFF for  8K Flash devices
//   2) U8 byte - byte to write to Flash.
//
// This routine writes <byte> to the linear FLASH address <addr>.
//-----------------------------------------------------------------------------

void FLASH_ByteWrite (unsigned char __code *addr, U8 byte)
{
   unsigned char EA_SAVE = IE_bit.EA;                   // Preserve EA
   unsigned char __xdata *pwrite;             // FLASH write pointer

   IE_bit.EA = 0;

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

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

   pwrite = (unsigned char __xdata*)addr;

   FLKEY  = 0xA5;                      // Key Sequence 1
   FLKEY  = 0xF1;                      // Key Sequence 2
   PSCTL = 0x01;                      // PSWE = 1 which enables writes PSEE = 1

   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

    IE_bit.EA = EA_SAVE;                // Restore interrupts

}

//-----------------------------------------------------------------------------
// FLASH_PageErase
//-----------------------------------------------------------------------------
//
// Return Value : None
// Parameters   :
//   1) FLADDR addr - address of any byte in the page to erase
//                    valid range is 0x0000 to 0x39FF for 16K Flash devices
//                    valid range is 0x0000 to 0x1DFF for  8K Flash devices
//
// This routine erases the FLASH page containing the linear FLASH address
// <addr>.  Note that the page of Flash containing the Lock Byte cannot be
// erased from application code.
//-----------------------------------------------------------------------------

void FLASH_PageErase (unsigned char __code *addr)
{
    unsigned char EA_SAVE = IE_bit.EA;  // Preserve EA
    unsigned char __xdata *pwrite;             // FLASH write pointer

   
   IE_bit.EA = 0;                             // Disable interrupts

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

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

   pwrite = (unsigned 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

   IE_bit.EA = EA_SAVE;                       // Restore interrupts
}