topic imx6q-sd how to configurate can? in i.MX Processors

imx6q-sd how to configurate can?

zhenli — Fri, 20 May 2016 08:23:53 GMT

Hi,

BSP:linux 3.14

board:imx6q-sabresd

I add to imx6qdl-sabresd.dtsi :

&flexcan1{

pinctl-names ="default";

pinctrl-0 = <&pinctrl_flexcan1_1>;

status = "okay";

};

pinctrl_flexcan1_1:flexcan1grp-1{

fsl,pins = <

MX6QDL_PAD_GPIO_7__FLEXCAN1_TX 0x80000000

MX6QDL_PAD_GPIO_8__FLEXCAN1_RX 0x80000000

};

Then I got this:

root@imx6qsabresd:~# dmesg | grep can

[ 1.324931] ahci-imx 2200000.sata: SSS flag set, parallel bus scan disabled

[ 1.375581] 2090000.can supply xceiver not found, using dummy regulator

[ 1.381635] flexcan 2090000.can: device registered (reg_base=c0a88000, irq=142)

[ 4.441142] can: controller area network core (rev 20120528 abi 9)

[ 4.449269] can: raw protocol (rev 20120528)

[ 4.452243] can: broadcast manager protocol (rev 20120528 t)

[ 4.456630] can: netlink gateway (rev 20130117) max_hops=1

root@imx6qsabresd:~#

After that

root@imx6qsabresd:~# ip link set can0 up type can bitrate 125000

flexcan 2090000.can can0: writing ctrl=0x0e312005

root@imx6qsabresd:~# ifconfig can0 up

root@imx6qsabresd:~# ifconfig can0

can0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00

UP RUNNING NOARP MTU:16 Metric:1

RX packets:0 errors:0 dropped:0 overruns:0 frame:0

TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:10

RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

Interrupt:142

cansend can0 112#11223344

But nothing happen,I can not get anything by oscilloscope.

Am I wrong?How to slove it.

Thank you!

Re: imx6q-sd how to configurate can?

igorpadykov — Fri, 20 May 2016 10:35:07 GMT

Hi zhen

flexcan usage of SabreSD is described on

How to enable CAN bus on i.MX6Q SabreSD

Best regards

igor

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Re: imx6q-sd how to configurate can?

zhenli — Sat, 21 May 2016 07:58:40 GMT

Hi igorpadykov,

Thanks for your reply!

I had do as this PDF file,but it can not to use too!

I think my dts file is not correct!

So i got 2090000.can supply xceiver not found, using dummy regulator

Could you help me?

Thank you very much!

Re: imx6q-sd how to configurate can?

igorpadykov — Mon, 23 May 2016 00:35:23 GMT

you can ignore this message

~igor

Re: imx6q-sd how to configurate can?

zhenli — Mon, 23 May 2016 08:24:36 GMT

Thank you for your reply.

It's noting on my TX pin,I don't know what is wrong with my configuration.

Everything looks OK,but nothing happend after command "cansend 001#11223344"

Re: imx6q-sd how to configurate can?

zhenli — Mon, 23 May 2016 09:05:44 GMT

Hi,

I guess it's IO register value wrong.

fsl,pins = <

MX6QDL_PAD_GPIO_7__FLEXCAN1_TX 0x80000000

MX6QDL_PAD_GPIO_8__FLEXCAN1_RX 0x80000000

I tried to use 0x1f0b0 and 0x1b0b1,result not change.

Re: imx6q-sd how to configurate can?

amit251291 — Tue, 10 Apr 2018 09:35:53 GMT

Hi igorpadykov,

Im not able to open above link. Its showing me unauthorized error. Could you please help me to get the permission to use that link ? Or can you please share it as a pdf ?

Re: imx6q-sd how to configurate can?

amit251291 — Tue, 10 Apr 2018 09:36:54 GMT

Hi Zhen,

could you solve this issue ?
I am also facing the same issue here.