RM48L730: Flash ECC Calculation

Hi Ratid,

The Code Composer Studio (windows, or Linux) and Uniflash have built-in algorithm to calculate ECC and program the ECC value into the flash ECC region. We have another tool called nowECC for generating ECC, but it only is for windows.

Hi,

when using the flash API f021 to generate ECC for RM48L730, I get these values  :

My binary is programmed at address 0x8000 so ECC are located at 0xF0401000, 

are those Ecc correct ? I don't understand why I get the same ECCs for each successive 128bits ? 

regards,

Hello Ratid,

No, they are not correct ECC for the data and address on the left side. The 64-bit data + address gets 1 byte ECC data.

1. 0x00008000, ECC is 0x43
2. 0x00008008, ECC is 0x11
....
8. 0x00008038, ECC is 0x9F

Hi QJ,

Thank you for reply!

I am using the function "Fapi_issueProgrammingCommand" from flash API 021 :

		Fapi_issueProgrammingCommand((uint32_t *)dst,
									 (uint8_t *)src,
									 (uint32_t) bytes,
									 0,
									 0,
									 Fapi_AutoEccGeneration);

but I got wrong result as you mentionned in your previous reply,

The flash API write twice the same ECC (even if it is wrong)  to two locations as shown here :

Calculated ECC for data at address 0x20000 is the same (0x92) as the one for address 0x20010 which is not yet programmed !

I don't understand why the flash API write wrong things to ECC flash area,

any help would be appreciated,

Thank you

Hello,

The flash ECC is located at 0xF0040000. The ECC of the data at 0x20000 is located at 0xF0044000.

Hi,

As mentionned in datasheet SPNS176C of RM48L730 in page 76, the flash data ecc are located in 0xF040_0000 :

regards,

Sorry, I made a mistake. Will check

Hello,

The ECC for 0xEA00206F (at 0x20000), 0xEA00743E (at 0x20004) is 0x92. The ECC for 0xFFFFFFFF at 0x20008 and 0x2000C is 0xF3.

Is the flash erased and programmed (application code starting at 0x20000) successfully?

Hello,

Yes the memory is erase and programmed without any problem, I check the return values and always equal to "eFLASH_STATUS_OK"

in my example here, I just programmed the first 64 bytes to make sure that the Flash API is not working well...

0x20000 contains data 0xEA00206FEA00743E , the ECC should be equal to 0x62, but I get 0x92. the other  shown addresses are not programmed 

0x92 is correct for cortex-R4 LE. How do you get your display attached in your post?

I am using the memory watch window of Eclipse.

I get the same result when I make direct access of ECC location in my code.

Hi Ratid,

Can you please write more data (several double-words) to flash starting at 0x20000? I want to know how the ECC data is arranged in your MCU memory.

I programmed a file to 0x20000 sector, and checked the ECC, the ECC is correct.

Hi,

This is the example provided in my first post :

6 words of 64bytes writen starting at address 0x8000

Hello,

At 0x00008000, the ECC is 0xA7; same as yours
At 0x00008008, the ECC is 0xE1; same
At 0x00008020, the ECC is 0x5C same
At 0x00008028, the ECC is 0x6D same
At 0x00008030, the ECC is 0x09 different from yours (F2)
...
The ECC for those data and address are correct. But I don't know why the ECC for 0x00008008/0x00008010/0x00008018 and their data are not correct (which are listed in your ECC window).

Hi,

still looking for a solution for my issue.

Yes some ECC are correct 

this is my initilization function of FAPI021 :

--------------------------------------------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------------------------------------------

Is it the correct way to initialize the flash API ?

Hello,

Please try the flash erase/program functions in TI bootloader to see if the ECC is calculated and written correctly.

6204.bl_flash.c

4555.bl_flash.h

1057.bl_config.h

You can call flash erase/program functions in your beginning of main():

data[32]=....

Fapi_BlockErase( 1, 0x180000, 32);

Fapi_BlockProgram( 1, 0x180000, &data[0], 32);

0702.flash_defines.h

Hi !

I used attached files in previous reply, and I still get uncorrect ECC:

the only thing I changed is the main frequency :

#define SYS_CLK_FREQ            40            //MHz

insteed of 

#define SYS_CLK_FREQ            160           //MHz

Here is the result :

Hello,

I generated the ECC with F021Flash API and programmed to flash. They are correct:

This is the code I used:

uint32_t Success[] = {0xea0004bd, 0x00000000,
0x00000000, 0x00000000,
0x00000000, 0x00000000,
0x00000000, 0x00000000,
0x4605b538, 0x2d06460c,
0x2d08d005, 0x2d0ed003,
0x2005bf18, 0x2010d108,
0xfa34f000, 0x60044803};

status = Fapi_BlockErase(0, 0x08000, 0x2000);

status = Fapi_BlockProgram( 0, 0x8000, (unsigned long)&Success, 64);

If you don't erase the flash before programming it, please erase it first. 

Hi, 

Thank you again for your reply !

I used your main program and I still get some wrong ECC:

Here is my source files :

6332.dev.zip

Hello Ratid,

Did you make any changes to the function of Fapi_BlockProgram(...)?

I di not make any change in this function,
I used the file you sent me previously (bl_flash.c)

See thread "CCS/TMS570LC4357: Fapi EEPROM programing"

Hello Ratid,

Can you post your project including the linker cmd file and out file? Thanks

Hi,

I used the project bellow and I get the same wrong Ecc:

(project already compiled, the out file is in "flashEccIssue\Debug__TI\flashEccIssue.out" 

2727.flashEccIssue.zip

best regards,

Hello Ratid,

This is test result using your out file:

The ECC is correct.