【求助】flash写入屏蔽中断的问题
msp430在操作flash时一般都需要先屏蔽中断，确保flash的写入过程不被打断，现在俺有个不明白的问题是，如果将flash操作的函数放到某个中断服务函数里，是不是就不需要做这个处理了，俺的理解是msp430在进入某个中断服务函数后会自动屏蔽其他的中断，这样就相当于保证了flash写入过程的持续性。不知道俺理解的对不对。比如放到下面的中断函数中，是不是FlashErase和FlashModifyInt函数中就不需要增加_DINT()操作了。#pragma vector=PORT1_VECTOR
__interrupt void Port1()
{
//以下为参考处理程序，不使用的端口应当删除其对于中断源的判断。
if((P1IFG&BIT5) ==BIT5)
{
//处理P1IN.5中断
P1IFG &= ~BIT5; //清除中断标志
//以下填充用户代码
if(FactoryModeFlag==0)
{
CorrectIndex = 0;
FlashErase(SegD); //when entry factory mode,erase SegC;
LEDBlink(50);
LEDBlink(50);
FactoryModeFlag = 1; //entry factory mode
P1IES &= ~BIT5; //change Pin1.5 interrupt trigger mode to rising edge
}
else
{
FlashModifyInt(SegD,0x02,CorrectIndex);
LEDBlink(5);
LEDBlink(5);
LEDBlink(5);
LEDBlink(5);
FactoryModeFlag = 0; //exit factory mode
P1IES |= BIT5; //change Pin1.5 interrupt trigger mode to falling edge
}
}
LPM3_EXIT; //退出中断后退出低功耗模式。若退出中断后要保留低功耗模式，将本句屏蔽
}
下面是俺参照资料连抄带改搞了个flash操作的函数：
/*
* FlashOperation.h
*
*Created on: 2013-9-16
* Author: zhanghaibo1
*/
#ifndef FLASHOPERATION_H_
#define FLASHOPERATION_H_
/*************************************
* msp430G2553 has 4 data segments, there are
* 64 bytes in every data segment. there are
* 256 byte in all
* D:0x1000--------0x003F
* C:0x1040--------0x107F
* B:0x1080--------0x10BF
* A:0x10C0--------0x10FF
****************************************/
#define SegA 0x010C0
#define SegB 0x01080
#define SegC 0x01040
#define SegD 0x01000
#define SegSize 64
void FlashInit(void) //flash初始化
{
FCTL2 = FWKEY + FSSEL_2 + FN1; //选择SMCLK作为时钟源，二分频
}
void FlashCheckBusy(void) //flash检测忙
{
while(BUSY == (FCTL3 & BUSY)); //检测是否忙
}
void FlashErase(int SegX) //flash段擦除
{
_DINT();
FlashCheckBusy(); //check flash is busy or not
FCTL3 = FWKEY; //lock=0 means unlock
FCTL1 = FWKEY + ERASE; //enable segment erase
*((int *)SegX) = 0x00; //erase segment--write null
FlashCheckBusy(); //flash is busy?
FCTL3 = FWKEY | LOCK; //Lock
return;
}
void FlashWriteChar(unsigned int addr,char wdata) //falsh写字节
{
_DINT(); //disable sum interrupt
FlashCheckBusy(); //check if flash is busy
FCTL3 = FWKEY; //Unlock
FCTL1 = FWKEY + WRT; //Enable write
*((unsigned char *)addr) = wdata; //write wdata to address of addr
FCTL1 = FWKEY; //disable write
FCTL3 = FWKEY + LOCK; //lock
return;
}
char FlashReadChar(unsigned int addr) //flash读字节
{
char rdata;
rdata = *(char*)addr; //read content of address addr
return rdata;
}
void FlashWriteWord(unsigned addr,unsigned int wdata) //flash写字
{
_DINT(); //disable sum interrupt
FlashCheckBusy(); //if flash is busy, then wait
FCTL3 = FWKEY; //unlock
FCTL1 = FWKEY + WRT; //enable write
*((unsigned int *)addr) = wdata; //write wdata to addr
FCTL1 = FWKEY; //disable write
FCTL3 = FWKEY + LOCK; //lock
}
void FlashWriteInt(unsigned addr,int wdata) //flash write signed int
{
_DINT(); //disable sum interrupt
FlashCheckBusy(); //if flash is busy, then wait
FCTL3 = FWKEY; //unlock
FCTL1 = FWKEY + WRT; //enable write
*((unsigned int *)addr) = wdata; //write wdata to addr
FCTL1 = FWKEY; //disable write
FCTL3 = FWKEY + LOCK; //lock
}
unsigned int FlashReadWord(unsigned addr) //flash读字
{
unsigned int rdata;
rdata = *(unsigned int *)addr; //read content of addr
return rdata;
}
int FlashReadInt(unsigned addr) //flash read signed int
{
int rdata;
rdata = *(int *)addr;
return rdata;
}
void FlashModifyChar(unsigned int SegX,char AddrNum,char wdata) //flash修改字节
{
char i, TempArray;
for(i=0;i<SegSize;i++)
{
TempArray = *(unsigned int *)(SegX + i);
}
TempArray = wdata; //write wdata to one item in the array
FlashErase(SegX); //erase segment
FCTL3 = FWKEY; //unlock
FCTL1 = FWKEY + WRT; //prepare write
for(i=0;i<SegSize;i++)
{
*(unsigned int *)(SegX + i) = TempArray;
}
FCTL1 = FWKEY; //disable write
FCTL3 = FWKEY + LOCK; //lock
}
//read address = AddrNum*2 + SegX; eg:if AddrNum=0x02 then real address = 1004
void FlashModifyInt(unsigned int SegX,char AddrNum,int wdata) //flash修改int,zhb add this function 2013-10-09
{
char i;
int TempArray;
for(i=0;i<(SegSize/2);i++)
{
TempArray = *(unsigned int *)(SegX + i*2);
}
TempArray = wdata; //write wdata to one item in the array
FlashErase(SegX); //erase segment
FCTL3 = FWKEY; //unlock
FCTL1 = FWKEY + WRT; //prepare write
for(i=0;i<SegSize/2;i++)
{
*(unsigned int *)(SegX + i*2) = TempArray;
}
FCTL1 = FWKEY; //disable write
FCTL3 = FWKEY + LOCK; //lock
_EINT(); //Enable interrupt
}
void FlashBurstWrite(unsigned int SegX,int *pStr) //flash批量写
{
int i;
FlashErase(SegX); //erase segment
FCTL3 = FWKEY; //unlock
FCTL1 = FWKEY + WRT; //enable write
for(i=0;i<2*sizeof(pStr);i++)
{
*(unsigned char *)(SegX + i) = *(pStr + i);
}
FCTL1 = FWKEY; //disable write
FCTL3 = FWKEY + LOCK; //lock
}
#endif /* FLASHOPERATION_H_ */
先谢谢各位了。 不想看代码，430进入中断服务函数后自动关总中断，所以如果是是在中断服务函数内调用写flash函数，就不需要再关总中断了 dalarang 发表于 2014-1-14 16:31
不想看代码，430进入中断服务函数后自动关总中断，所以如果是是在中断服务函数内调用写flash函数，就不需要 ...
谢谢啊，贴代码目的不是让帮忙排错，是给比我还初级的人参考（代码俺在launchpad上调试过了的）。
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