flashmemop.c

来自「移植UCOS于增强型５１单片机上」· C语言 代码 · 共 55 行

#include <msp430x14x.h>
#include "FlashMemOP.H"
#include "Globe.H"
#include <string.h>
//操作这些函数之前需要关闭看门狗

//擦除一个Flash段的函数
void EraFlashSeg(unsigned int Segment)
{
	//WatchDogStop();
	_DINT();
	
	FCTL2	= FWKEY+FSSEL_1+20;					//MClk/21
	FCTL3	= FWKEY+((FCTL3 & 0x00ff) & (~LOCK));
	FCTL1	= FWKEY+((FCTL1 & 0x00ff) | ERASE);
	*((char *)Segment)=0x00;	//启动擦除操作
	FCTL3	= FWKEY+((FCTL3 & 0x00ff) | (LOCK));
	
	_EINT();
	//WatchDogStart();
}

//使用下面的Flash写程序之前要将对应的Flash空间（段）擦除，因为Flash只能由1写成0
//往Flash 的SegAddress地址里面写入Size字节的数据，数据的首地址为DataAddress
bool WriteFlash(unsigned char * DataAddress,unsigned int SegAddress,unsigned int Size)
{
	unsigned int i;
	//WatchDogStop();
	_DINT();
	
	FCTL2	= FWKEY + FSSEL_1 + 20;					//MClk/21
	FCTL3	= FWKEY + ((FCTL3 & 0x00ff) & (~LOCK));
	FCTL1	= FWKEY + WRT;
	for(i=0;i<Size;i++)		//开始写入
	{
		while (FCTL3 & BUSY == BUSY);
		*((unsigned char *)(SegAddress + i)) = *(DataAddress + i);
	}
	FCTL1	= FWKEY;		//写完成清除WRT标志
	FCTL1	= FWKEY + LOCK;
	
	_EINT();
	//WatchDogStart();
	if(!memcmp((unsigned char *)SegAddress,DataAddress,Size))  //比较被写区域与数据区是否相同
	{
		return true;
	}
	else
	{
		return false;
	}
}