AM263P4: MCAN configuration

Hello Maxim,

In the SFEC field inside the Standard Message ID Filter Element Field Descriptions chapter, I believe the terminology "Set priority" is equivalent to generating the referenced pulse filter event.

1/2) This is dependent on the value configured in the SFEC Field as described by the table. I don't believe Set Priority and Store in RX Buffer is a valid option, only FIFO[0:1].

3) These are the MCAN_FE (Filter Event) Interrupt Router options and can be routed to DMA_XBAR to generate DMA request. I will also loop in the SW expert here to provide any additional feedback regarding configuration requirements here.

Best Regards,

Zackary Fleenor

Hello Zackary,

about store in Rx Buffer and generation of pulse at filter event (DMA request)

in Acceptance Filtering chapter written 

but i cant find this configuration in the SFEC field in Standard Message ID Filter Element .

also please let me know about the priority if its for DMA or for interrupt request,

as i understand set priority is configuration that sets HPM[8] bit to '1' in the MCAN_IR register.

Thank you,

Maxim

Hello Maxim,
Can you confirm if your exact requirement is to store the incoming message in the Rx buffer and generate ICLK pulse at the event?

Best regards,
Aswathi

Hello Aswathi

I am in FW design stage , so i want to understand what are my possibilities.

can i  store the incoming message in the Rx buffer and generate ICLK pulse at the event

and  store other  incoming message in the Rx FIFO0/1 and generate ICLK pulse at the event in other filter element ?

Hi Maxim, 
Apologies for the delay. I have looped in another developer who is currently working on MCAN with DMA. He might be able to provide insights into this.

Best regards,
Aswathi

Hi Aswathi,

Still waiting for answer.

Hi Maxim,

If your incoming messages are stored in RXFIFO then you need to generate ICLK pulse for that specific filter element.

Hi Akash,

How do I configure the MCAN to generate this pulse?

Hi maxim,

Allow me some time. I will get back to you on this.

Hi,

Managed to generate a DMA trigger (filter event pulse) when using a dedicated Rx buffer!

as I understand from the AM263Px user manual & MCAN user manual (BOSCH), filter event pulse can be generated only if using a dedicated Rx buffer, need to understand if there is any algorithm to clear the new data flag (not by the HOST CPU) register (NDAT1/NDAT2) when using DMA ?

Hi,

No there is no other algorithm to clear the new data flag. We need to use new data flag register (NDAT1/NDAT2) only.