Flash problem

[yvonperr]

Posted on October 30, 2006 at 13:52

Flash problem

[yvonperr]

Posted on October 30, 2006 at 10:30

Hi

I am running the IAR IDE and I am trying to program 3 Words to flash B0F7. I am running from lower banks of B0. At address 0x030000 I have defined a table where 3 words must be written over at a latter time. However the rest of the table must remain intact so I cannot erase the sector. The 3 words are set to 0xFF when the program is written to Flash. I do disable the write protection of B0F7 prior to the writes. The peculiar thing is that if I step through the code the 3 words are programmed fine, but if I am running nothing gets programmed.

Help !

[kleshov]

Posted on October 30, 2006 at 11:29

Can you post your code here? One thing that can be happening is that you are not waiting for the program operation to finish.

Regards,

- mike

[yvonperr]

Posted on October 30, 2006 at 11:33

Hi Mike

Here is an extract of my code:

I have tried WordWrite located both in RAM and Flash.

__ramfunc void FLASH_MYWordWrite(u32 XtargetAdd, u32 Xdata)

{

// FLASH_WaitForLastTask();

// set the Word Programming bit 'WPG' in the CR0 Reg

FLASHR->CR0 |= FLASH_WPG_Mask;

// Load the destination address in AR

FLASHR->AR = XtargetAdd;

// Load DATA to be programmed in DR0

FLASHR->DR0 = Xdata;

// Set the Write Mode Start bit 'WMS' in the CR0 Reg to Start Write Operation

FLASHR->CR0 |= FLASH_WMS_Mask;

// Wait until the write operation is completed

// FLASH_WaitForLastTask();

}

unsigned char USB_Set_SerialNo( char *buf )

{

unsigned char success = 0;

long address = 0x0030064;

char tmp[20];

int i, j, pos;

long data1;

if ( (strncmp( ''Set_SerialNo'', buf, 12)) == 0 )

{

success = 1;

if ( strlen( buf ) != 20 )

return( 2 );

/* Disable the FLASH protection on Bank 0 sector 7 */

FLASH_WritePrConfig (FLASH_B0F7,DISABLE);

pos = 13;

for ( j=0; j

{

i=0;

tmp[i++] = buf[pos++];

tmp[i++] = 0;

tmp[i++] = buf[pos++];

tmp[i++] = 0;

memcpy( &data1, tmp, 4 );

FLASH_WaitForLastTask();

FLASH_MYWordWrite (address, data1) ;

FLASH_WaitForLastTask();

address +=4 ;

}

FLASH_WritePrConfig (FLASH_B0F7,ENABLE) ;

}

return( success );

}

[kleshov]

Posted on October 30, 2006 at 12:03

The code looks right. Just one question: is FLASH_WaitForLastTask() declared as __ramfunc?

- mike

[yvonperr]

Posted on October 30, 2006 at 12:07

Hi Mike

No the FLASH_WaitForLastTask() is not define in RAM. However I will try it right now.

Yvon

[yvonperr]

Posted on October 30, 2006 at 12:24

Hi Mike

Locating FLASH_WaitForLastTask() in Ram made no difference.

Yvon

[yvonperr]

Posted on October 30, 2006 at 12:41

Hi Mike

By Locating both FLASH_WaitForLastTask() and FLASH_WordWrite() in RAM and using Bank 1 Sector 1 everything works properly. It still does not explain why I can't use Bank 0 Sector 7. And yes I am using an STR711FR2.

Thanks

Yvon

[kleshov]

Posted on October 30, 2006 at 13:31

You should call FLASH_WaitForLastTask() from within FLASH_MYWordWrite(), otherwise the CPU steps out of the RAM function into a ROM function, the code of which is invalid during flash programming. Just uncomment FLASH_WaitForLastTask() at the last line of FLASH_MYWordWrite().

- mike

[yvonperr]

Posted on October 30, 2006 at 13:52

Hi Mike

I did that and it now appear to work also in Bank0 Sector7.

Thanks

Yvon