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Author Topic: FD-CAN-BUS: busy without beeing connected to bus (STM32G431)  (Read 944 times)

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Online eTobeyTopic starter

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FD-CAN-BUS: busy without beeing connected to bus (STM32G431)
« on: December 05, 2023, 07:34:02 pm »
Hi,

i got stuck on the FDCAN on the G431. Trying to get messages and interrupt. Neither works. Strange state.

I had made sure, that there is a signal and everything is activated that is needed (what i think/found). And then i just disconnected the bus, and still the state is busy.
The output is:
RxId: 0 RxLevel: 0 Status: 2

One bit is exactly 2us.

I guess its something with the init? There is not really anythin else running.
« Last Edit: December 05, 2023, 07:39:33 pm by eTobey »
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Offline Dave

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Re: FD-CAN-BUS: busy without beeing connected to bus (STM32G431)
« Reply #1 on: December 06, 2023, 01:19:29 pm »
Show us how your CAN transceiver is connected to the MCU.
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Online eTobeyTopic starter

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Re: FD-CAN-BUS: busy without beeing connected to bus (STM32G431)
« Reply #2 on: December 07, 2023, 01:13:38 am »
Never mind...
HAL_FDCAN_Start sets the state as busy, and leaves with a HAL_OK.

Busy is the new ready...

I got to drop this HAL ASAP.
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