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flexcan_interrupt_transfer_low_level

flexcan_interrupt_transfer_low_level#

Overview#

The flexcan_interrupt_transfer_low_level example shows how to use FlexCAN driver in non-blocking interrupt way using low-level hardware APIs:

This example is similar to flexcan_interrupt_transfer but uses low-level hardware APIs instead of the transfer layer:

  • Does NOT use flexcan_handle_t or FLEXCAN_TransferCreateHandle()

  • Does NOT use FLEXCAN_TransferSendNonBlocking() / FLEXCAN_TransferReceiveNonBlocking()

  • Uses direct hardware APIs: FLEXCAN_WriteTxMb(), FLEXCAN_ReadRxMb(), FLEXCAN_GetMbStatusFlags(), FLEXCAN_ClearMbStatusFlags()

  • ISR directly handles interrupts without transfer layer callback mechanism

In this example, two FlexCAN instances on a single board communicate with each other:

  • FlexCAN_RX is configured as receiver

  • FlexCAN_TX is configured as transmitter

  • When user presses any key in the terminal, FlexCAN_TX sends a CAN message to FlexCAN_RX

  • FlexCAN_RX receives the message and prints the content to the terminal

  • The data byte is incremented for each transmission

This design demonstrates one-way communication between two FlexCAN peripherals on the same board using low-level interrupt-driven APIs.

Supported Boards#

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