stm32/pyb_can: Add support for FD CAN rxcallbacks. #8206
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This commit enables the support for rxcallback on CAN FD interfaces. For FD CAN it is necessary to call HAL_FDCAN_ActivateNotification. This sets the ILS and ILE bits to enable the interrupt lines. For FD CAN, we clear the RX pending en RX overflow flags explicitly. Signed-off-by: Jan Staal <[email protected]>
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This PR appears to be a dupplicate of work done here #8057 The same runaway interrupt behaviour was encountered there and resovled by clearing of the interrupt flags. I'm proposing to close this PR in favor of #8057 |
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The rxcallback functionality was not yet working for FD CAN interfaces.
This commit enables the support for rxcallback on CAN FD interfaces.
For FD CAN it is necessary to call HAL_FDCAN_ActivateNotification.
This sets the ILS and ILE bits to enable the interrupt lines.
For FD CAN, we clear the RX pending en RX overflow flags explicitly.
At the core of this fix is calling the HAL_FDCAN_ActivateNotification method.
This in turn configures the ILS and ILE registers, see below.
__IO uint32_t ILS; /*!< FDCAN Interrupt Line Select register, Address offset: 0x058 */__IO uint32_t ILE; /*!< FDCAN Interrupt Line Enable register, Address offset: 0x05C */For the pending and overflow interrups it is needed to clear the flags explicitly.
This was not needed for the buffer full interrupt. I could not figure out why that is.
Code reviews are welcome, I have tested this code on H7 (FD CAN) and F4 (CAN) mcu's.