CAN MCAL

[MridulBajaj]

Hi,

I am trying to implement CAN communication using the AUTOSAR MCAL layer on the S32K144 MCU. I am able to transmit data successfully, but I am not able to receive any data.

I am using the polling method (not interrupts), and currently calling the following API periodically:

Can_MainFunction_Read();

• Is this API sufficient for receiving CAN messages in polling mode?

• Do I need to use any other API along with it to receive messages properly?

• Could you please share an example or reference code to implement CAN reception using AUTOSAR MCAL (polling mode) on S32K144?

[PetrS]

Hi,

yes, it is enough to call MainFunction_Read periodically. Upon reception you should get CanIf_RxIndication callback.
Refer e.g to RTD200 demo example, which is using polling mode for both TX and RX.

BR, Petr

[MridulBajaj]

When I try to debug my code, it’s not entering the Rx callback function. It gets stuck in the Can_Ipw_MainFunction_Read() function, where the Message Buffer (MB) state is not IDLE.
How can I resolve this issue?

[PetrS · Accepted solution]

Hi,

you can check within debugger if message is really received. Inspect used MB area, MB flag.
Also be sure no error is detected during reception, otherwise message is not moved-in and no MB flag will be set, check ECR/ESR1 registers.

BR, Petr

[MridulBajaj]

Thank you. I have figured out the solution.