CAN Bus doesn't work in normal mode between two MCUs

mr_vineet · ‎2024-04-11

Hello,
Hope you all doing well..!!

I am using two microcontrollers i.e., for transmitting data I have to use STM32F407VET6 and for receiving I have to use STM32F407VGT6 also I have to connect MCP2551 CAN Transceiver. I am transmitting data from one board and receiving data from another board through CAN Bus Protocol Communication.

However, the data is not transmitted and received. I have properly checked the hardware connections and terminated the bus at both ends with 120-ohm resistors.

IDE: STM32CubeIDE

Which step should I follow for communication between boards?

Thank You in advance!!

SofLit · ‎2024-04-25

Hello,

With an oscilloscope or with a logic analyser, you need to check the availability of CAN frame on CAN_TX pin of the transmitter and on CAN_RX pin on the receiver.

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mr_vineet · ‎2024-04-26

I had to check with the logic analyser it's showing can_error.

SofLit · ‎2024-04-26

can_error? How?

Could you please share the analyser CAN frames screenshots of CAN_TX of the transmitter and CAN_RX of the receiver?

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