writing to flash databank 0

[ezanen9]

Posted on November 02, 2006 at 12:09

writing to flash databank 0

[ezanen9]

Posted on April 26, 2006 at 11:47

Hi all,

I want to write to flash databank 0 three(3) different integers values. I want to write these values at different times to the same bank in the flash but at different adresses.

There is a programming example in the ST library's.

/* Initialize the FLASH */

FLASH_Init () ;

/* Disable the FLASH protection on Bank 1 sector 0 */

FLASH_WritePrConfig (FLASH_B1F0,DISABLE) ;

/* Disable the FLASH protection on Bank 1 sector 0 */

FLASH_SectorErase (FLASH_B1F0) ;

/* Write 0x12345678 to Bank 1 sector 0 */

FLASH_WordWrite (0x000C0000,0x12345678) ;

/* Warning!! : The write protection can be enabled only on a permanent way */

/* Enable the FLASH protection on Bank 1 sector 0 */

/* FLASH_WritePrConfig (FLASH_B1F0,ENABLE) ; */

My questions are:

1. Do I always have to clear a flash bank prior to each writing to it?

2. If I wrote one value to the flash at for example adress 0x000C0000 is it still possible to write a second and a third value? Or do I have to write all the data to the flash at ones?

3.What meens the following in the example: ??

/* Warning!! : The write protection can be enabled only on a permanent way */

/* Enable the FLASH protection on Bank 1 sector 0 */

/* FLASH_WritePrConfig (FLASH_B1F0,ENABLE) ; */

Is it ever possible to write to the flash after the above has happend?

Hope somebody can help a little bit,

Jimmey

[ezanen9]

Posted on April 27, 2006 at 12:47

Thanks RISC,

It works perfectly.

I only have a problem writing float value's to the flash.

float fPort=0; //init

fPort = 22.64; // fill float with value

FLASH_WordWrite (0x000C0044,fPort); // write float to flash 0x400C0044 adress

When I read the float back from the flash the problem is that only 22(0x00000016) is written to the flash. The .64 missing.

I also saw this with my memory view via the JTAG port. What's my mistake?

Perhaps the float doesn't fit in the 32 bits space??

Regards,

Jimmey

[macke_a]

Posted on November 02, 2006 at 12:09

Hello !

I already have to use the programm example in the ST library which looks in the first thread of Jimmey. But this one dosn´t work by me....

I use the Keil µVision3 and a STR710FZ µControler.

Could somebody help me, from this problem ?

I think some adjustment parameters a wrong!

u32 Read_Data;

/* Initialize the FLASH */

FLASH_Init () ;

/* Disable temporarily the FLASH protection on Bank 1 sector 0 */

FLASH_WritePrConfig (FLASH_B1F0,DISABLE) ;

/* Erase Bank 1 sector 0 */

FLASH_SectorErase (FLASH_B1F0) ;

/* Write 0x12345678 to Bank 1 sector 0 */

FLASH_WordWrite (0x000C0000,0x12345678) ;

/* Read back the written data at address 0x400C0000*/

Read_Data = FLASH_WordRead(0x000C0000);

The Read_Data out gives me a wrong value back

Thank you...