i.MX ProcessorsのトピックRe: IMX6dual CAN interface

IMX6dual CAN interface

mariyapradeep — Thu, 08 Dec 2016 06:56:22 GMT

Hi,

I am using imx6 dual wandboard. I wanted to know how we can test the CAN interface. I added the flexcan support in dts and got the can0 interface listed on giving ifconfig. I gave the following commands :

canconfig can0 bitrate 125000
ifconfig can0 up

cansend can0 -i0x100 11 22 33 44

From " cat /proc/net/can/stats " I got the number of transmitted frames increasing.

Is it possible to see the frames transmitted from board 1 on board 2 ? how to connect two imx6 dual wandboard boards for testing the same?

Thanks in advance

Re: IMX6dual CAN interface

igorpadykov — Thu, 08 Dec 2016 07:52:27 GMT

Hi mariyapradeep

please check

All Boards FlexCAN

imx-test package (/can folder)
www.nxp.com/lgfiles/NMG/MAD/YOCTO/imx-test-5.4.tar.gz

connection example can be found on

https://community.nxp.com/docs/DOC-104151

Best regards
igor
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Re: IMX6dual CAN interface

mariyapradeep — Thu, 08 Dec 2016 12:24:41 GMT

Hi,

I connected the CAN_H to CAN_H & CAN_L to CAN_L of two imx6 dual wandboard boards via 60 ohms resistors each and followed the steps as in All boards FlexCAN but still had no frames recieved at board 2. Is there anything missing?

Thanks in advance

Re: IMX6dual CAN interface

igorpadykov — Fri, 09 Dec 2016 05:13:42 GMT

what do you mean by "via 60 ohms resistors" ?

This should be termination resistor. Could you check signals

with oscillloscope. Also could you test with nxp reference boards

Sabre AI, as only nxp reference boards supported here, for wandboard boards

one can post on

Wandboard - NXP i.MX6 ARM Cortex-A9 Community Development Board - FORUMS

It may be useful to look at i.MX6Q Sabre AI dts, pay attention to "can-en", "can-stby"

and associated with them can transceiver signals CAN_EN, CAN_STBY

linux-2.6-imx.git - Freescale i.MX Linux Tree

and Chapter 37 FlexCAN Driver attached Linux Manual

Best regards
igor