topic Re: problems sending CAN messages from NXP S32k144 in S32K

problems sending CAN messages from NXP S32k144

pierpaolo_dini — Mon, 27 Apr 2020 20:18:01 GMT

Hi, everybody,
I'm using NXP S32k144 to communicate with an Arduino using can protocol.
So far I've used the can_pal example, and as for the reception of messages that Arduino sends to NXP no problem, in fact, I can print all the id on screen.
The problem is when I try to send some messages to Arduino from NXP.
I'm checking the data traffic with a peak device and in fact, I only see the messages I set on the Arduino board.

This is the code I used inside the infinite loop in the main :

I'd basically like to send a message with id 456 from NXP to Arduino.

I'm definitely doing something wrong with the code, but I don't understand what.
Thanks for the advice.

PS: what if I want to send more than one from the NXP board?

Regards.

Re: problems sending CAN messages from NXP S32k144

Robin_Shen — Wed, 29 Apr 2020 05:38:01 GMT

Hi Pierpaolo Dini ,

If you modify the #define TX_MSG_ID (0x456) in can_pal example.
Does the S32K144EVB able to transfer CAN message on CAN bus.(PCAN View can be used to observe the CAN bus)
Please first make sure it works.

Best Regards,

Robin

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Re: problems sending CAN messages from NXP S32k144

pierpaolo_dini — Wed, 29 Apr 2020 08:18:52 GMT

Hi Robin_Shen

first of all, thank you for answering.
I did as you suggested.
I noticed the following things: in the picture I sent you, the structure had the wrong fields, and now I've corrected it; then I noticed that in the while loop if I enter all the settings to send messages, the peak device doesn't see anything but the message sent by Arduino.
If instead in the while loop I insert only the call to the CAN_Send function then I see the following:

the message with id 0x120 is the one I'm sending with Arduino.
There seems to be a problem with the format of the message sent by NXP(?).

PS: How can I activate the PCAN-View?

Regards.

Re: problems sending CAN messages from NXP S32k144

pierpaolo_dini — Wed, 29 Apr 2020 11:11:01 GMT

Robin_Shen‌

ah ok, I saw right now what is a pcan-view.
I use busmaster with a pcan-usb, because is not my device and I have used as usual for me (practically pcan-view == busmaster).
sorry for the stupid question.

regretfully I still have a communication problem.

thanks for your support.

Re: problems sending CAN messages from NXP S32k144

Robin_Shen — Fri, 01 May 2020 01:49:46 GMT

I am not sure your Arduino and CAN analyzer configured the same protocol as NXP CAN PAL example.

Here you can check the CAN FD protocol configuration:

Re: problems sending CAN messages from NXP S32k144

Jeremy_He — Sun, 17 May 2020 14:39:45 GMT

Below are a few tips when using CAN on S32K144-EVB.

1. Be sure to use 12V adaptor power input instead of 5V MicroUSB cable. the CAN PHY UJA1169 is 12V powered.

2. if your code on S32K using can FD instead of traditional CAN, be sure the PCAN_VIEW enabled FD, too. Otherwise, PCAN_VIEW on PC won't receive the data. Instead, if CAN FD is enabled on PCAN_VIEW, a traditional CAN frame from the S32K can be received and showed on PCAN_view.

3. If no data received, I would suggest using an oscilloscope probe check whether data sent out through TX or can High and Low output pins.