CAN

Function Description

Init bus n extframe True/False mode x baudrate TX RX

• Initializes the CAN bus, configures whether it is in extended frame mode, the working mode (normal mode, loopback mode, etc.), and sets the baud rate.

Get state of the controller

• Gets the state of the CAN controller.

If any message waiting on the FIFO

• Checks if there are unread messages in the FIFO.

Send Message with id x

• Sends a message and specifies the ID of the data frame. The ID length is 1 byte. The input data type must be list or tuple, and the data frame's data length is required to be 8 bytes.

Receive message

• Receives data.

Set filter bank x mode x message

• Sets a filter bank.

Clear filter

• Clears the filter bank.

Clear TX queue

• Clears the transmission queue.

Clear RX queue

• Clears the reception queue.

Restart

• Restarts the CAN bus.

Deinit

• Stops the CAN bus.

Usage Method

Test case: Use two M5Core devices, connect the CAN UNIT to PORT C on each (if you need to use a different port, please change the pin configuration in the initialization program), and run the following program on each device. Press button A to send a data frame.

• Example program M5F file download