PIC32_CANbus cannot receive signal

cherrynana

PIC32_CANbus cannot receive signal [Copy link]

I am using PIC32MX1/2/5 Starter Kit, Harmony v2.06, and want to implement CAN receiving data.

I selected CANBUS in Harmony Configurator and set it up as shown below.

I think there seems to be no problem, and then send the CAN signal to the microcontroller, but call

When calling the function bool DRV_CAN0_ChannelMessageReceive(CAN_CHANNEL channelNum, int address, uint8_t DLC, uint8_t* message), no information is always received.

Setting a breakpoint at the CAN interrupt has not been activated.

There is already a 120 ohm resistor on the board. I used an oscilloscope to see a signal on the RX pin of the CAN Transceiver, which means there should be no problem with the hardware. The signal has been transmitted, but there is a problem with the microcontroller settings and it is not received.

However, I have tried changing various parameters in MHC, such as Filter, Mask, etc., but still no data is received.

I would like to ask experienced friends, is there anything I have set up incorrectly or somewhere else I can check?

Thank you all for your suggestions~~!

mzb2012

It is recommended to configure the CAN initialization function directly by yourself. According to the PDF document, configure

cherrynana

The problem has been solved. After setting all parameters, click Execute after click to calculate CAN configuration values in the above picture.