S32K中的主题 Re: Request for interrupt based FlexCAN reception example code

Request for interrupt based FlexCAN reception example code

sachin922185 — Fri, 23 Sep 2022 12:17:56 GMT

Hello Team,

We are using s32k344evb-q172 evaluation board. We want to perform the interrupt based CAN reception but unfortunately there is no example code available for same.

Request you to please share the interrupt based FlexCAN reception example code.

Thanks & Regards,

Sachin N

@ndd922478

Re: Request for interrupt based FlexCAN reception example code

PetrS — Mon, 26 Sep 2022 11:25:47 GMT

Hi,

I placed some RTD based example on https://community.nxp.com/t5/S32K/FlexCAN-IP-example-not-running-in-normal-mode-on-S32K344-EVB/td-p/1520088
If you are using s32k344evb-q172 with TJA1043 you can skip transceiver init within code.
In the code a callback is used to indicate MB interrupt.
Hope it helps

BR, Petr

Re: Request for interrupt based FlexCAN reception example code

sachin922185 — Thu, 29 Sep 2022 10:23:54 GMT

Hello Petr,

Thanks for the reply.

I tried this example, but event is triggering once reception is completed from Mailbox to CPU.

Our use case is that there should be interrupt when message is just come into Mailbox.

Please guide on this, how we can achieve our use case?

Thanks & Regards,

Sachin N

Re: Request for interrupt based FlexCAN reception example code

PetrS — Mon, 03 Oct 2022 09:16:23 GMT

Hi,

if using RTD driver, this is done that way, using callbacks. If you have e.g baremetal code then generally, the MB flag in IFLAG register is set when message is received/transmitted without error. If also MB mask bit is set in the IMASK register and interrupts are enabled in the core, the MB interrupt is called.

BR, Petr