the objective of this particular project was to transmit data frames from stm32h750dbk(discovery kit) to stm32g491re(nucleo)
it is debugging and creating live expression for both of the data types in receiving and transmit end of board i have not connected any transceiver between them because it has inbuilt fdcan ports
i am attaching both the codes for g4 and h7
the picture of hardware and the live expression result when debugged separately
1 ACCEPTED SOLUTION
Accepted Solutions
Hello,
1- You have two issues in the RCC config with H750 Disco board:
1-1. You need to use HSE with the external crystal oscilator (25MHz) instead of HSI for CAN communication.
1-2. With a crystal oscillator you need to set Bypass configuration in the RCC.
In final you need this config:
2- Another issue in the GPIO config on H7:
You set PB9 as CAN_Tx:
while in the schematics, FDCAN1_Tx should be PH13:
That's why every time I ask to check the hardware.
I've modified some parameters in your ioc files and in your projects. I've attached a zip file containing both projects.
As you can see G4 is receiving the CAN messages in live:
Migrate to CubeIDE V1.18.0/CubeMx 6.14.0.
If you didn't succeed with the modified projects, I'm pretty sure it's an issue in your HW. Therefore I will close the thread after a period of time.
Hope that helps.
Hello,
Thank your for sharing the image because it raises a big issue.
You are using CAN in a bad hardware configuration.
From the disco board there is a CAN-FD transceiver (CAN_H/CAN_L) that you connected directly to FDCAN_Tx and FDCAN_Rx in the NUCLEO board!
You need to add a transceiver to the NUCLEO board to establish a CAN bus between two CAN nodes like the following:
You can also refer to this article and the related Github hotspot.
IS the connection right now
1- Do you mean the data are transmitted were not received? By whom? which is transmitting and which is receiving?
2- The CAN module:
1)H7 is transmitting and G4 is receiving
2)can transciever module used is NXP TJA1050
Sorry I didn't notice this issue:
@revvathi wrote:
IS the connection right now
You don't need a transceiver for the DISCO board side. It has already a transceiver on board:
Also, refer to the figure I previously shared.
If you are not familiar with CAN bus need to have more information about it.
