rwflash.c

c8051f新华龙单片机开发运用程序

//============================================================================
//该程序执行片内FLASH的读写操作,将0-9十个数写入到起始地址为0X1000的FLASH空间中.

//-----------------------------------------------------------------------------
// Includes
//-----------------------------------------------------------------------------

#include <c8051f310.h>                 // SFR declarations
#include <intrins.h>
#include <stdio.h>

//-----------------------------------------------------------------------------
// 16-bit SFR Definitions for 'F31x
//-----------------------------------------------------------------------------

sfr16 DP       = 0x82;                 // data pointer
sfr16 TMR2RL   = 0xca;                 // Timer2 reload value
sfr16 TMR2     = 0xcc;                 // Timer2 counter
sfr16 TMR3     = 0x94;                 // Timer3 counter
sfr16 TMR3RL   = 0x92;                 // Timer3 reload value
sfr16 PCA0CP0  = 0xfb;                 // PCA0 Module 0 Capture/Compare
sfr16 PCA0CP1  = 0xe9;                 // PCA0 Module 1 Capture/Compare
sfr16 PCA0CP2  = 0xeb;                 // PCA0 Module 2 Capture/Compare
sfr16 PCA0CP3  = 0xed;                 // PCA0 Module 3 Capture/Compare
sfr16 PCA0CP4  = 0xfd;                 // PCA0 Module 4 Capture/Compare
sfr16 PCA0     = 0xf9;                 // PCA0 counter


//-----------------------------------------------------------------------------
// MAIN Routine
//-----------------------------------------------------------------------------
void main (void) {
  unsigned char xdata *pwrite;          // pointer to FLASH used for writes
                                        // NOTE: this pointer must be located
                                        // in <data> or <idata> space!
  unsigned char code *pread;            // pointer to FLASH used for reads
  char EA_save;                         // saves the current state of the
                                        // interrupt enable bit.
                                        // test string

  unsigned char code test_string[] = "01234567890!";
  RSTSRC |= 0x02;                       // enable the VDD monitor
                                        // Disable Watchdog timer
  PCA0MD &= ~0x40;                      // WDTE = 0 (clear watchdog timer
                                        // enable)
                                        // erase the FLASH page at 0x1000
  EA_save = EA;
  EA = 0;                               // disable interrupts (precautionary)
                                        // initialize write/erase pointer
  pwrite = (unsigned char xdata *) 0x1000;
  PSCTL = 0x03;                         // MOVX writes erase FLASH page
  FLKEY = 0xA5;                         // FLASH lock and key sequence 1
  FLKEY = 0xF1;                         // FLASH lock and key sequence 2
  *pwrite = 0;                          // initiate page erase
  PSCTL = 0;                            // MOVX writes target XRAM
  EA = EA_save;                         // re-enable interrupts
                                        // copy a string to FLASH memory at address 0x1000
                                        // initialize FLASH read pointer
  pread = (unsigned char code *) test_string;
  EA_save = EA;
  EA = 0;                               // disable interrupts (precautionary)
  pwrite = 0x1000;                      // initialize FLASH write pointer
  PSCTL = 0x01;                         // MOVX writes target FLASH memory
  while (*pread != '\0') {              // copy until NULL is detected
  FLKEY = 0xA5;                         // FLASH lock and key sequence 1
  FLKEY = 0xF1;                         // FLASH lock and key sequence 2
  *pwrite = *pread;                     // copy byte
  pread++;                              // advance pointers
  pwrite++;
  }
  FLKEY = 0xA5;                         // FLASH lock and key sequence 1
  FLKEY = 0xF1;                         // FLASH lock and key sequence 2
  *pwrite = '\0';                       // NULL-terminate string
  PSCTL = 0x00;                         // MOVX writes target XRAM
  EA = EA_save;                         // re-enable interrupts  
                                                                															 
  																 
																                                                                                                                                      
while (1) {                             // spin forever

  }
}