topic Re: S32K344 Evaluation Board FlexCan Example running in S32K

S32K344 Evaluation Board FlexCan Example running

dsantxez — Tue, 21 Sep 2021 15:08:30 GMT

I am trying to run the Flexcan example with the evaluation board. The program compiles and runs as it should, however, never apears in the CAN interface.

I have added the IO configuration code line and checked that the CAN configuration is not in loopback mode and that the FlexCAN0 pins are the ones stated in the Evaluation Board PDF

S32K3X4EVB-Q257_HW-UM.pdf

I have checked the CAN_L and CAN_H lines and 120Ohms are there, enough to get CAN communication with a short cable. The configuration of the EVAL board is at 500kbps and CanAnalyzer is setup to 500kbps as well.

Anyone could give me a hint to what is missing?

Re: S32K344 Evaluation Board FlexCan Example running

PetrS — Tue, 21 Sep 2021 20:26:47 GMT

Hi,

there is secure transceiver TJA1153 connected to the MCU on the board. When no configuration is stored in non-volatile memory of the TJA1153, it does not allow the MCU to communicate with the CAN bus. It awaits configuration. Depending on the STB_N level the configuration needs to be sent via the bus from remote or via pin TXD.
STB_N=L, then configuration must come from local host via the TXD pin
STB_N=H, then configuration must come from remote node via the CAN bus
I will sent you simple example showing basic transceiver init.

BR, Petr

Re: S32K344 Evaluation Board FlexCan Example running

JoDo — Wed, 22 Sep 2021 09:24:55 GMT

Re: S32K344 Evaluation Board FlexCan Example running

dsantxez — Wed, 22 Sep 2021 14:38:23 GMT

Hi,

I have tried to convert the plain setup example in plain to Flex API. I send this the messages that appear in the example and control de pin that enables setup mode, but with no success.

Could you check to see what I am doing wrong?

Thank you in advance,

Denis

Re: S32K344 Evaluation Board FlexCan Example running

PetrS — Thu, 23 Sep 2021 11:41:17 GMT

Hi,

you are controling wrong pin for STB_N and prepare payload incorrectly.
See attached main.c for changes.

BR, Petr

Re: S32K344 Evaluation Board FlexCan Example running

JoDo — Fri, 24 Sep 2021 10:37:15 GMT

Hello,

I tried to use an external transceiver for CAN0 and wanted to use other pins than PTA6/7 Rx/Tx. So I selected PTF21/20 Rx/Tx and genereated new code,but when I run the program there is no response to them. I checked the pin connection by using it as GPIO and blink test.

When I use PTA6/7, I can see the message with an oscilloscope and my external transceiver also sends the correct message.

Is there any other configuration that should be done?

Re: S32K344 Evaluation Board FlexCan Example running

PetrS — Mon, 27 Sep 2021 06:34:26 GMT

Hi,

did you set respective IMCR register for RX pin as well? That is IMCR[0]=5.

To test proper pin setting for FlexCAN, connect TX and RX pin together without transceiver and send a message. You should see message transmitted still.

BR, Petr

Re: S32K344 Evaluation Board FlexCan Example running

fxn — Thu, 30 Jun 2022 09:24:54 GMT

Hi All,

I try your code but "CAN" still can't work, I can't measure the wave in can_tx.

Could you email sample code with IDE setting to me? Thanks a lot!

my email: jeff09051006@hotmail.com

Re: S32K344 Evaluation Board FlexCan Example running

fxn — Fri, 01 Jul 2022 00:14:02 GMT

Hi Sir,

I attach my project for you easy checking. Thanks.

Re: S32K344 Evaluation Board FlexCan Example running

Eason_L — Mon, 02 Oct 2023 08:37:43 GMT

Hi,

I have the same problem, but changing PTA7 to PTB1. Do you have the solution?

Re: S32K344 Evaluation Board FlexCan Example running

ToHoangLinh — Wed, 11 Oct 2023 15:04:07 GMT

Hi @PetrS , I tried your code solution for CAN Transceiver on S32K3X4 EVB T172 board.

It has an issue:

works - nonwork - works - nonwork - works - nonwork ......

Each time we reload the ELF file, the code becomes non-work (CAN0 not sync, bus off), but if we load again that ELF file, it works (and repeatedly)

We are not sure how to handle it for end-users. Can you please check?

Re: S32K344 Evaluation Board FlexCan Example running

Eason_L — Thu, 12 Oct 2023 01:22:54 GMT

Hi,
Connect TX and RX pin together solves the proplem, thanks.

Re: S32K344 Evaluation Board FlexCan Example running

JonAnder_Amante — Fri, 24 Nov 2023 08:08:36 GMT

Hi Sir,

I am trying to run the Flexcan programme but I have different errors in the board MR-CANHUBK344, I want send information from Can_0 and receive to Can_1. Firstly, when I realize the debugging I can`t receive the information in the array of rxdata. I checked the program with the mode of loopback and it`s correct but when I debug the program in normal mode I had problems. I have the same main as you and I think that the configuration of pins are well. About pins configuration I have configurated PTA6 as CAN0_rx, PTA7 as CAN0_tx, PTA22 as CAN1_rx and PTA23 as CAN1_tx. I send you mi program because I dont`t know what is my error.

Thank you for all,

Re: S32K344 Evaluation Board FlexCan Example running

anakha — Wed, 03 Jan 2024 14:25:58 GMT

What do you mean connect Rx and Tx together (connect to each other physically?) and how could it work at that way?

Re: S32K344 Evaluation Board FlexCan Example running

Salomi — Mon, 25 Mar 2024 09:43:39 GMT

Hi , Could you please help me to configure the IMCR register in S32 Studio IDE ?