Model-Based Design Toolbox (MBDT)中的主题 Re: CAN analyzer send CAN messages are different in MPC5744 example projects

CAN analyzer send CAN messages are different in MPC5744 example projects

chmjob90 — Thu, 21 Nov 2019 09:24:55 GMT

Hi,Daniel.

In the two examples given by"NXP Model-Based Design Toolbox for MPC5744 Example Projects/MPC574x MCU Targeted Simulink Models/Communitions/', can1 and can2 are.

Once the Board power on ,CAN1.slx will send CAN messages periodically. No matter after stop and restart the CAN analyzer,theCAN1.slx will send CAN messages normally .But，for CAN2.slx, I need to reset the MCU or power on the board again once i stop the the CAN analyzer . Is this normal ？
How i make sure the the board can send CAN messages normally whether i stop and restart the CAN analyzer？

Here are the two Models opened both opened in the Simulink:

Looking forward to your solution !
Thank you very much!

Re: CAN analyzer send CAN messages are different in MPC5744 example projects

Daniel_Popa — Thu, 21 Nov 2019 11:36:16 GMT

Hi chmjob90@163.com‌,

I think the second example stops working because is based on interrupts and since the CAN message can't be sent out the TX Complete interrupt is no longer cleared.

You might need to check the manual of the MPC chip - but most likely that is the cause.

Best regards,
Daniel

Re: CAN analyzer send CAN messages are different in MPC5744 example projects

chmjob90 — Thu, 21 Nov 2019 13:00:55 GMT

Thanks for your prompt reply！

You meant the CAN analyzer is stopped and CAN message failed to be sent out So TX complete interrupt is not cleared ? And then,even if i restart the CAN analyzer ,the model can not restart sending CAN message?

How can i make the interrupt to be cleared to ensure the board to send CAN message again?
Thanks for taking the time to explain the process！

Re: CAN analyzer send CAN messages are different in MPC5744 example projects

chmjob90 — Tue, 26 Nov 2019 14:49:25 GMT

Hi,Daniel

I have been looking forward to your answer for several days. Could you spare some precious time to help me solve the following problems: How to modify the model attached to send multiple CAN messages and keep sending CAN messages without reset the CAN analyzer after the CAN analyzer is stopped and started again?

Up to now ,even though i added another CAN message (different ID) in the model ,the CAN analyzer only sent one ID CAN message. The CAN analyzer will stop sending CAN messages after stopped and started .

dumitru-daniel.popa 撰写:
Hi hm Chen,

I think the second example stops working because is based on interrupts and since the CAN message can't be sent out the TX Complete interrupt is no longer cleared.
You might need to check the manual of the MPC chip - but most likely that is the cause.

Best regards,
Daniel

# keep sending multiple messages after stop and start CAN analyzer