Page 1 of 1
Serial Driver issue on STM32H743ZI2
Posted: Thu Jan 14, 2021 2:39 pm
by nas_mc
Hello everybody, im new to Chibios and OS in general. we are starting a new Project on STM32H743ZI2 Dev Board and im encountering an issue with the Demo included with ChibiStudio. The Serial Driver transmittion isnt working correctly. Since this Demo should be working out of the box, i thought might ask for help since it could be an unknown bug. Im able to receive characters on the Terminal, but it seems that some characters are being skipped. Also i did change the Baudrate to 38400. Did someone Encounter this Problem before? The Version of ChibiOs is 20.3.x. i guess its the latest stable version. an image of the problem is in the attachment.
- chibios_issue.PNG (7.58 KiB) Viewed 5664 times
Re: Serial Driver issue on STM32H743ZI2
Posted: Thu Jan 14, 2021 2:49 pm
by Giovanni
Hi,
Which cut is on your board? the demo is for old cuts, those limited to 400MHz, it could be incompatible with the most recent one. Look into the Makefile.
Giovanni
Re: Serial Driver issue on STM32H743ZI2
Posted: Thu Jan 14, 2021 3:07 pm
by nas_mc
Hi Giovanni Thanks for your fast reply.
do you mean Rev by cut? well its Rev V. and makefile (-DSTM32_ENFORCE_H7_REV_V) and folder name specifies that the demo is for Rev V or am i missing something ?
Nas
Re: Serial Driver issue on STM32H743ZI2
Posted: Thu Jan 14, 2021 4:28 pm
by Giovanni
Hi,
Yes, I mean the revision.
Anyway, the code has received changes because differences in the various revisions.
The latest version is 20.3.2, I think you have an older one because the demo is named RT-STM32H743ZI_REV_XY-NUCLEO144 now and the macro is:
UDEFS = -DSTM32_ENFORCE_H7_REV_XY # Remove for non revision X or Y devices.
Giovanni
Re: Serial Driver issue on STM32H743ZI2
Posted: Thu Jan 14, 2021 5:28 pm
by nas_mc
Hello again,
you were right i didnt have the latest version, so i downloaded the v20.3.2 but the problem unfortunatly presists (i deleted the enforce from makefile). im wondering if im the only one who is facing this problem.
Re: Serial Driver issue on STM32H743ZI2
Posted: Thu Jan 14, 2021 5:33 pm
by Giovanni
The demo is working, it is just that you are reading corrupted data, the reason could not be in the SW but related to your setup. Could you try some other terminal emulator for reading the serial port? also try to update the ST-Link formware, it is possible that ST-Link and MCU are not agreeing on exact baud rate for some reason.
Tomorrow I will give it a try here.
Giovanni
Re: Serial Driver issue on STM32H743ZI2
Posted: Thu Jan 14, 2021 9:49 pm
by nas_mc
Thank you Giovanni for the hint, i had the ST Link already updated with the latest firmware, however it was with the wrong MCO setting. now i set it HSI/2 8MHz (Default) and its working and i can see the character stream.
I really appreciate your help.