Flash loader with another mcu

[Yunus ARI]

Hi Everyone,

I want to do e flash loader device that can be load binary to mcu via Swdio pin. Is any one can give advice about this? Maybe stlink hardware can be use or any STM32-Disco board can be use I don't know.

I just want to create something like this. Because, I have many of device in field and some time I need to do firmware update. My devices don't have any bootloader option. Because of that I have to update devices manuel with STlink. Field personnel that do this firmware update can't find computer always. So if I can create a device that can be take power from my device and can be load new firmware that has inside it will be useful.

I'm open to any advice for development.

[Tesla DeLorean · Accepted solution]

Search "STM32 Stand-alone Programmer", or STM ISP

Perhaps look at OpenOCD, CMSIS-DAP, BIack Magic Probe type implementations.

Another method used is NRST, BOOT0, USARTx implementation using the ROM based System Loader and USART protocol (AN-2606, AN-3155 ?)

[Yunus ARI]

Thankyou for search advice. I will look on it.

In my case unfortunately USART non an option. Because any of my devices in field didn't have USRT connection on it.

[Tesla DeLorean]

Yeah, field updates and FOTA are generally things to think about and implement BEFORE deployment.

If you have standard JTAG/SWD headers then Stand-Alone Programmers (Button Boxes) would be an option, although having access to those for a technician seems more convoluted than being able to connect an RS232 cable to a laptop.

For systems with large code/data payloads the use of USB Flash sticks, MicroSD cards, or QSPI Dongle device might be easier to deploy and faster.

[Tesla DeLorean]

Thematically similar https://community.st.com/s/question/0D53W000019CzkZSAS/programming-secondary-chip-using-swd-interface

[Yunus ARI]

Thankyou for all. I ordered a Stand-alone Programmer. Fist I will try it if its work for me.