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FDCAN bit timings incorrectly calculated #6

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maxschommer opened this issue May 8, 2025 · 0 comments
Open

FDCAN bit timings incorrectly calculated #6

maxschommer opened this issue May 8, 2025 · 0 comments
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boot Bootloader bug Something isn't working mw MW-related issue or pull-request openbl Open Bootloader

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@maxschommer
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In the following section the FDCAN settings are laid out and a nominal and data rates of 500kbps and 2Mbps are calculated.

stm32-mw-openbl/Interfaces/Patterns/FDCAN/fdcan_interface.c

Line 54 in 7689c2d

fdcan_ker_ck | 20 MHz | 20 MHz

I plugged in those settings into CubeIDE for the H523, and got 250kpbs and 1Mbps calculated. I'm biased to trust the CubeIDE calculation because it agrees with the AN2606 Table 115 which lists FDCAN settings as 250kbps and 1Mbps.

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@ALABSTM ALABSTM added bug Something isn't working mw MW-related issue or pull-request labels May 9, 2025
@ALABSTM ALABSTM added openbl Open Bootloader boot Bootloader labels May 9, 2025
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boot Bootloader bug Something isn't working mw MW-related issue or pull-request openbl Open Bootloader
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@maxschommer @ALABSTM @KRASTM