About JPatr.3

JPatr.3 · 2023-04-24

Many times, using serial communication at 115299 baud, when I jump from the bootloader to the application, although I receive a positive response, the application does not start (never reaches the main of the app).I am using a STM32H755IIT and I have...

JPatr.3 · 2022-08-18

Hello,I am facing a problem for the first time with one device while doing something that has worked perfectly on several (dozens) before of the same model (STM32H755IIT6).I am updating the firmware of the device with a custom update tool that has cl...

JPatr.3 · 2022-04-19

Hello,I am trying to communicate with the bootloader by serial.Most of the times it works nice but sometimes it fails as I fail to enter the bootloader.To give a context, in order to enter the bootloader I set the rts of my FTDI high (this will set t...

JPatr.3 · 2023-05-03

Hello @Imen DAHMEN thank you for your response. I have checked and the stack pointer directly after a reset, for e.g., is 0x24041B28. This is far from the end of the RAM (which should be 0x24080000), so I don't think this is the issue...

JPatr.3 · 2022-08-24

Solved: The only difference on the protocol was that the stm32CubeProgrammer waits 4 seconds after receiving the positive response from the erase, while the tool would start requesting the write right again. Added this 4s and the problem went away. S...

JPatr.3 · 2022-04-19

Thank you for your quick answer, I will try your hints!The version of the bootloader is the 3.1 and the model a STM32H755IIT6.Update: I already had the communication with the bootloader set to 8-bit EVEN but only 1 stop bit. Changed it to 2 STOP Bits...

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Positive response on jump from bootloader to application, but application is not started

How do I get a positive response from the bldr write memory command if it then the data is not properly written at the memory location? And this only happens in one out of dozen devices of the same model.!

No response from bootloader after entering

Re: Positive response on jump from bootloader to application, but application is not started

Re: How do I get a positive response from the bldr write memory command if it then the data is not properly written at the memory location? And this only happens in one out of dozen devices of the same model.!

Re: No response from bootloader after entering