Nucleo L432KC bootloader via UART failed

Yu LU · ‎2017-04-25

Posted on April 25, 2017 at 10:23

Hi, I met a problem using bootloader on pc to wirte program into STM32L432KC via UART.

Here is the process I did :

1,I connect D1/Tx and D0/RX(PA9 and PA10 of STM32L432KC) to CH340 USB to UART board, 5V Vin and GND. USB to PC.

2, I connect 5V to pin 31 of STM32L432KC:PH3\BOOT0 , reset the ic, then pull

PH3\BOOT0 = 0V.

The LED do not blinky, which means the stm32L432KC is in boot mode.

3, I opened Flash Loader Demonstrator boot loader, chose the COM port , click next:

THen next:

The software can not read Flash Mapping, nor the target name.Can not do anything with this.

Checked in ST link Utility, no Read out protection.

So I do not know what is the problem ? Software or hardware ? Nucleo board or CH430 ?

Thank you!

Yu

Tesla DeLorean · ‎2017-04-25

Posted on April 25, 2017 at 17:25

Connect to a terminal supporting input/output of hex bytes (like RealTerm) and walk the device through the loader's protocol. The protocol is described in some of the manuals.

Set port to 9600 8E1 (Even parity is important), make sure no other pins the System Loader is expecting signals on have transitions.

Send an 0x7F byte to the loader, see if you get the 0x79 response. Then try other commands listed for the loader.

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View solution in original post

Imen.D · ‎2017-04-25

Posted on April 25, 2017 at 17:23

Hi

,

You find attached a newer version of the FlashLoader supporting STM32L4x3xx devices (256K and 128K)

Please try it and keep me informed if it is working as expected or you faced any issue using it.

Thanks

Imen

________________

Attachments :

STMFlashLoader Demo_V2.9.0RC4.zip : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006Hyhj&d=%2Fa%2F0X0000000bBA%2FOwhW8njIgYp.cft_XKTa5ohyecIITYJ55oS3CxPQF2E&asPdf=false

When your question is answered, please close this topic by clicking "Accept as Solution".
Thanks
Imen

Tesla DeLorean · ‎2017-04-25

Posted on April 25, 2017 at 17:25

Connect to a terminal supporting input/output of hex bytes (like RealTerm) and walk the device through the loader's protocol. The protocol is described in some of the manuals.

Set port to 9600 8E1 (Even parity is important), make sure no other pins the System Loader is expecting signals on have transitions.

Send an 0x7F byte to the loader, see if you get the 0x79 response. Then try other commands listed for the loader.

Tips, Buy me a coffee, or three.. PayPal Venmo
Up vote any posts that you find helpful, it shows what's working..

Yu LU · ‎2017-04-26

Posted on April 26, 2017 at 10:25

Hi Imen D,

Thank you so much! It works! So I think you may update the software published in your site.:)

THank you!!!

Best regards,

Yu

Yu LU · ‎2017-04-26

Posted on April 26, 2017 at 10:27

Hi Clive One,

Thank you for your sugguestion! In fact I need a simple non-program way to accelerate my project. I tried your say , it works. THank you!

Yu