Internal flash problem with memory mapping

[pchignon]

Posted on September 15, 2005 at 11:57

Internal flash problem with memory mapping

[pchignon]

Posted on September 15, 2005 at 07:16

Hi,

I noticed that the following code :

/* TEST FLASH INTERNE */

long *p=(long*) 0x000C0000UL;

long i=*p;

AsystTrace(''MAIN:1\r\n'');

FLASH_Init();

AsystTrace(''MAIN:2\r\n'');

FLASH_WritePrConfig(FLASH_B1F0, DISABLE);

AsystTrace(''MAIN:3\r\n'');

FLASH_SectorErase(FLASH_B1F0);

AsystTrace(''MAIN:4\r\n'');

FLASH_WordWrite(0x000C0000, i+1);

AsystTrace(''MAIN:5\r\n'');

i=*p;

correctly works when the function is execute in sector 0x000xxxxx But failed when map in 0x400xxxxx. The only thing change in my project is the linker option. I use winIDEA IDE with IAR compiler. If I found enough time, I will try with IAR only with a simpler projet.

But now, I don't find any good reason for my bug.

Is somebody has an idea?

Thanks,

[pchignon]

Posted on September 15, 2005 at 08:49

Sorry, but my problem is not so simple.

You are right, I am mistaken. But the problem is still there.

But I have a question.

Is there something to be careful when the program jump from 0x00000000 to 0x40000000. And then, change the bootcr register to map ram at 0x00000000

Thanks,

[pchignon]

Posted on September 15, 2005 at 10:57

Yes,

This is what I did.

I don't know why but during flash erase, the undefined handler is call, when I am executing code at 0x400xxxxx.

I also try to program from RAM but the problem is still there.

I think it is a problem with my linker. I don't understand exactly the meaning of the scater file but IAR use a .xlc file with the same kind of options.

[pchignon]

Posted on September 15, 2005 at 11:57

Yes,

Thank you for your interest.

I think there is still something else.