IMX6Q SABRE AUTO CAN Module not working as expected on Linux 3.14

shyamjithkv — Tue, 09 Aug 2016 06:13:50 GMT

I am trying to use the CAN module 1 (CAN1)on an IMX6Q SABRE AUTO Board. The following are the list of commands I use to configure CAN1.

< ip link set can1 type can bitrate 250000 sample-point 0.875 loopback off listen-only off triple-sampling on >

< ifconfig can1 up >

1. After I configure CAN1 up, I do not see an idle high voltage on the CAN1 DB9 Connector pins(Pin2/Pin7). Why is this so?

2. After I press the SW1 (CAN wake-up switch) for a short while, the Pins 2 and 7 go idle high showing default CAN idle state. Can this be handled via any processor pins without using a switch press for the same ?

3. After i have an IDLE state on the CANH and CANL pins, i tried connecting a can sniffer hardware straight to the CAN1 DB9 connector, but i couldn't see Tx,RX from or to IMX6 CAN1. Is there anything I am missing here ?

I am using the following commands to send and receive,

< cansend can1 123#DEADBEEF >

< candump can1 any,0:0,#FFFFFFFF >

4. Regarding the termination resistance, i think the SABRE AUTO board uses a 60 ohm termination.My sniffer has a 120 Ohm termination inside. Shouldn't this be compatible as i dont have any long wires between the sniffer connector and the IMX6 CAN connector ?

Any help is appreciated.

Re: IMX6Q SABRE AUTO CAN Module not working as expected on Linux 3.14

igorpadykov — Thu, 11 Aug 2016 00:45:58 GMT

Hi shyamjith

flexcan testing general steps are described in

All Boards FlexCAN

for i.MX6 recommended to use imx-test package, folder /test/can

www.nxp.com/lgfiles/NMG/MAD/YOCTO/imx-test-5.3.tar.gz

Best regards

igor

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topic ​IMX6Q SABRE AUTO ​ CAN Module not working as expected​ on Linux 3.14 in i.MX Processors

​IMX6Q SABRE AUTO ​ CAN Module not working as expected​ on Linux 3.14

Re: ​IMX6Q SABRE AUTO ​ CAN Module not working as expected​ on Linux 3.14

topic IMX6Q SABRE AUTO CAN Module not working as expected on Linux 3.14 in i.MX Processors

IMX6Q SABRE AUTO CAN Module not working as expected on Linux 3.14

Re: IMX6Q SABRE AUTO CAN Module not working as expected on Linux 3.14