Hi all,
I wanted to enable the write protection option byte using I2C bootloader ( Bootloader given by stm32). This can be done using the stm32 debugger also. but in my case requirement is using I2C bootloader only.
MCU : STM32G0B1CET6
communication protocol: I2C
previously I have updated the user configuration option bytes using the same method(i2c bootloader). in which I have given the register address and the value. in that case, the option byte was updated as per the expectation.
For the write protection option byte, I tried multiple times with the same method and checked the write protection option byte using a debugger, but it is not updated(it remains as default).
below is the snapshot of the option byte register address. I am using the 0x1FFF7818 address to protect the first two pages.
1) Are there any additional steps I have to perform to enable the write protection?
2)does anyone have any idea how to do that?
If anyone has any ideas, please let me know. Applying this feature is a priority for us. and currently, we are blocked with this.
Thanks for your quick response,
>> Then consider other approaches...
My code running on MCU can do this updation. But that will not fulfill the actual requirement.
>> ..see if you can apply that knowledge vs the I2C method.
I have gone through the method UART/COM connectivity method.
the below snapshot shows the write protection command using the I2C system bootloader. Which can be achieved by three steps.
1) Send the write protection command (0x63 + 0x9C)
2) Send the number of sectors to be protected and checksum (0x01 + 0xFE).
3) Sector code and checksum.(0x01 + 0xFE)
I performed these three steps. I have received the ACK response from a device for the first two steps.
For the third step, I am not getting any response from the device.
Do you/anyone have any idea why the device is not responding for the last step? Am I missing anything?
Note: I am trying to write protect the first page of flash memory.
