单片机的flash断电数据保护程序（已经过试验）

1、/*/ / 本程序实现断电数据保护功能，断电可以保存128个数据（仅适用A区），也可以保存256个数据（使用A区和B区）/ /*#include #define uchar unsigned char #define uint unsigned intunsigned int value0; unsigned int value1;unsigned int *Flash_ptr; void write_SegA (unsigned int value0,unsigned int value1);void copy_A2B (void);unsigned int i;void delay() f

2、or(i=0;i50000;i+);void main(void) WDTCTL = WDTPW + WDTHOLD; / 关闭看门狗 Ini_Lcd(); /*flash的程序*/ FCTL2 = FWKEY + FSSEL0 + FN0; / 时钟分频，使flash的时钟频率在257K-476K value0 =0; value1 =0; Flash_ptr = (unsigned int *) 0x1080; / 设置A区的起始地址 for (i=0; i128; i+) value0=*Flash_ptr ; / 从flash当中读出数据value0，value1 value1=*(F

3、lash_ptr+1) ; /*/ while(1) value0+; value1+; write_SegA(value0,value1); /向flash当中写入数据 /写入主程序，value作为一个变量使用 /*向flash中写入数据*void write_SegA (unsigned int value0, unsigned int value1) unsigned int i; Flash_ptr = (unsigned int *) 0x1080; / 设置指针的起始地址，A区的起始地址是0x1080 FCTL1 = FWKEY + ERASE; / 擦除独立段 FCTL3 = F

4、WKEY; / 允许写入 *Flash_ptr = 1; / 设置为单字节写入模式 FCTL1 = FWKEY + WRT; / Set WRT bit for write operation for (i=0; i128; i+) / 连续写入128个数据 *Flash_ptr = value0; / 写数据 value0和 value1到flash当中 *(Flash_ptr+1) = value1; FCTL1 = FWKEY; / 保护flash FCTL3 = FWKEY + LOCK;/*从A区读取的数据赋值给B区(_)注意可以向一个区中先写入数据，再读取数据)*void copy_A2B (void) char *Flash_ptrA; char *Flash_ptrB; unsigned int i; Flash_ptrA = (char *) 0x1080; Flash_ptrB = (char *) 0x1000; FCTL1 = FWKEY + ERASE; FCTL3 = FWKEY; *Flash_ptrB = 0; FCTL1 = FWKEY + WRT; for (i=0; i1