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SofLit
ST Employee
since ‎2018-07-23
‎2024-07-24

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STM32 in dual CAN configuration: bxCAN Filter bank explanation and relation with CAN2 Start Bank parameter

2024-07-22
Introduction STM32 MCUs users may face an issue with CAN message reception mainly when the CAN2 instance is used. This issue may appear even if the hardware setup is correct, and CAN bit time and filters are configured correctly. If the value of Sta...

CAN reception issues: Reasons and general troubleshooting

2024-07-15
Introduction CAN bus is a robust protocol to transmit/receive data. It can be very sensitive to any issue that could lead to communication errors or even halt communication. STM32 users need to have a basic knowledge of the CAN bus (protocol + hardwa...

Can I use a CAN2.0A/CAN2.0B transceiver to transmit CANFD frames with an FDCAN peripheral on STM32?

2024-07-01
No. This is only possible if the communication bitrate does not exceed 1 Mb/s. A CAN2.0A/B transceiver cannot pass through bitrates > 1 Mb/s and transmitting higher bitrates could lead to communication errors due to distortions in bits. Find below...

Can I use a CANFD transceiver to transmit CAN2.0A/CAN2.0B frames with a bxCAN peripheral on STM32?

2024-07-01
Yes, it is possible. The transceiver does not have the intelligence to differentiate between CANFD and CAN2.0A/B and filter the CAN frame accordingly. It is just an active component that transforms digital signals to differential signals. The most i...
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