SMT32F407VGT6 / CAN issue

[JACK00]

主控板 （SMT32F407VGT6）与同服板 （STM32F407VGT6） 之间的CAN通讯，环境温度低于-10度，通讯不正常，环境温度高过-10度！

[mƎALLEm]

Hello @JACK00 ,

In next time, could you please describe your issue in English as other community members can help you?

Translation:

"The CAN communication between the main control board (SMT32F407VGT6) and the server board (STM32F407VGT6), the ambient temperature is lower than -10 degrees, the communication is abnormal, and the ambient temperature is higher than -10 degrees!"

Not sure the question is clear. Could you please elaborate more?

[JACK00]

The CAN communication between the main control board (SMT32F407VGT6) and the same server board (STM32F407VGT6) shows that the ambient temperature is below -10 degrees, the communication is abnormal, and the ambient temperature is above -10 degrees! Immediately returning to normal, may I ask what the reason is? Confirm that the CAN communication interface hardware chip meets the requirements!

[mƎALLEm]

What is your clock source? HSI or HSE?

[Tesla DeLorean]

Dupe  https://community.st.com/t5/stm32-mcus-products/smt32f407vgt6/td-p/624102