STM32L4R9 factory programming

[Makarand]

Hello,

I have a custom PCB that uses an STM32L4R9 controller and runs two applications. One is a bootloader and other is the actual app. The files are called boot.hex and app.hex.

The boards are made via a vendor and programmed with these files during ICT. We use ST Link programmer and SWD connection to program the devices.

I use the ST Link V2 Utility CLI to do this.

A batch file is made that runs all the commands that program the option bytes, erase chip, and programs the above files.

The problem I am facing is, the batch file fails to execute the first time. It fails after the option bytes step. The second time however, it always executes and programs the applications successfully.

I did wonder whether this is because the Read Out protection for STM32L4R is set to 1 from the factory? But again, I tried to revert the option bytes to factory after which I cannot read the flash memory again before setting it back to Level 0.

But if I connect a new and unprogrammed board to the ST Link V2 Utility it shows me all the memory content. I also saw that the reset value of the FLASH_OPTR register for the readout protection level is set to 0xAA.

 

However, datasheet also says that default value, I am assuming factory programmed is Level 1.

Here is my batch file. Version 1

Could anyone help me with what I am missing in these steps?

@Echo off
setlocal EnableDelayedExpansion

echo This file programs the bootloader and application to blink debug LEDs on PCBA
REM Cater for ST-Link installation on 64 and 32 bit machines
set EXE="%ProgramFiles(x86)%\STMicroelectronics\STM32 ST-LINK Utility\ST-LINK Utility\ST-LINK_CLI.exe"
if not defined ProgramFiles(x86) set EXE="%PROGRAMFILES%\STMicroelectronics\STM32 ST-LINK Utility\ST-LINK Utility\ST-LINK_CLI.exe"

echo Programming micro controller...
echo Erasing flash
%EXE% -c -ME
if %errorlevel% neq 0 goto error

echo Programming Option bytes
%EXE% -c -ob BOR_LEV=3 DBANK=1 -rOB
if %errorlevel% neq 0 goto error

echo Programming application...
%EXE% -c -P "app.hex" -V
if %errorlevel% neq 0 goto error

echo Programming bootloader...
%EXE% -c -P "boot.hex" -V
if %errorlevel% neq 0 goto error

goto ok

:error
echo An error occurred!
goto end

:ok
echo Completed successfully, recommend power cycling the UUT.

:end
REM Show status long enough to be read, then close
timeout /t 10

 

Another version I had tried was this: VERSION 2

 

@Echo off

REM Cater for ST-Link installation on 64 and 32 bit machines
set EXE="%ProgramFiles(x86)%\STMicroelectronics\STM32 ST-LINK Utility\ST-LINK Utility\ST-LINK_CLI.exe"
if not defined ProgramFiles(x86) set EXE="%PROGRAMFILES%\STMicroelectronics\STM32 ST-LINK Utility\ST-LINK Utility\ST-LINK_CLI.exe"

echo Erasing flash and setting option bytes...

%EXE% -ME -OB BOR_LEV=3 DBANK=1 -rOB -Q RDP=0xAA
if %errorlevel% neq 0 goto error

echo Programming bootloader application...
%EXE% -P "app.hex" -V -Q RDP=0xAA
if %errorlevel% neq 0 goto error

echo Programming base...
%EXE% -P "boot.hex" -V -Q RDP=0xAA
if %errorlevel% neq 0 goto error

goto ok

:error
echo An error occurred!
goto end

:ok
echo Completed successfully, recommend power cycling the UUT.

:end
REM Show status long enough to be read, then close
timeout /t 10

 

This also does not seem to work. 

 

A follow up question, after twice running the batch file and programming the boards, no matter what I do on the option bytes, I can always program the boards thereon. Is there a way for me to reset the micro to it's factory state so I can test updated batch files as I am now running about of boards to test. 

 

Thank you in advance for your help.

 

Makarand

[KDJEM.1]

Hello @Makarand;

it mentioned, in RM0432 User and read protection option bytes paragraph : Flash memory address: 0x1FFF 7800 (corresponding to OPTR option register) ST production value: 0xFFEF F8AA.  Therefore the RDP programmed by the fab is 0xAA meaning RDP level 0.

For FLASH_OPTR reset value, I will check internally.

CDM0061548 (This is an internal tracking number and is not accessible or usable by customers).  

 

Thank you for your contribution in STCommunity.

Kaouthar

 

[Andrew Neil]

---

@Makarand wrote:

I use the ST Link V2 Utility CLI to do this.

---

That's long been obsolete!

Have you looked at the STM32CubeProgrammer CLI ?

 

See also: Your Voice Matters : Help Us Improve STM32CubeProgrammer Usability & Error Messages

[Makarand]

Thank you very much both, for your replies. 

Yes, I have understood that the old utility is now obsolete and will start using the STM32CubeProgrammer CLI. Will update on the results. 

Unfortunately I do not have any unprogrammed boards left to try this out with. Is it possible to set the controller back into the state how it came from factory? I have tried setting option bits to look like a new controller but with that my old batch file also works so I am not sure whether the I have set the controller in the factory state.

 

Thank you in advance!

Makarand