resetcounter.bak

TI 集成高性能24位A/D转换器的8052 核心单片机MSC1210 DATA区的FLASH读写代码。

#include <stdio.h>
#include <reg1210.h>
#include "rom1210.h"

// define the page we want to modify
#define PAGE_START	0x0400
#define PAGE_SIZE	0x80

// define a pointer to this page
char xdata * pFlashPage;

// define a RAM area as a buffer to hold one page
char xdata Buffer[PAGE_SIZE];

int main()
{
	char Result;
	unsigned char i;

	pFlashPage = (char xdata * ) PAGE_START;

	// before writing the flash, we have to initialize
	// the usec and msec SFRs because the flash programming 
	// routines rely on these SFRs
	USEC  = 12-1;	// assume a 12 MHz clock
	MSEC = 12000-1;

	// copy the page from FLASH to RAM
	for(i=0;i<PAGE_SIZE;i++)
		Buffer[i] = *pFlashPage++;
	// increment the counter
	Buffer[0] += 1;

	// now erase the page
	page_erase(PAGE_START, 0xff, DATA_FLASH);

	Result = 0;
	// and write the modified contents back into flash
	for(i=0;i<PAGE_SIZE;i++)
		Result |= write_flash_chk (PAGE_START+i, Buffer[i], DATA_FLASH);

	// synchronize baud rate
	autobaud();
	printf("Writing flash returned %d\n", (int)Result);

	// re-read the counter
	pFlashPage = (char xdata *) PAGE_START;
	printf("Reset counter is now %d\n", (int)(*pFlashPage));
}