Difference between revisions of "DESK-MX6UL-L/Peripherals/CAN"

From DAVE Developer's Wiki
Jump to: navigation, search
 
(8 intermediate revisions by 2 users not shown)
Line 1: Line 1:
−
[[File:TBD.png|thumb|center|200px|Work in progress]]
+
<section begin="History" />
−
 
 
−
<section begin=History/>
 
 
{| style="border-collapse:collapse; "
 
{| style="border-collapse:collapse; "
−
!colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History
+
! colspan="4" style="width:100%; text-align:left" ; border-bottom:solid 2px #ededed" |History
 
|-  
 
|-  
−
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Version
+
! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white" |Issue Date
−
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Issue Date
+
! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white" |Notes
−
!style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Notes
+
|-
 +
| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |{{oldid|14243|2021/07/20}}
 +
| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |First DESK-MX6UL-L release
 +
|-
 +
| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |{{oldid|16322|2022/03/16}}
 +
| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |DESK-MX6UL-L 3.0.0 release
 
|-
 
|-
−
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|1.0.0
+
! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#ededed; padding:5px; color:#000000" |2023/05/04
−
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|Apr 2021
+
! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#ededed; padding:5px; color:#000000" |DESK-MX6UL-L 4.0.0 release
−
|style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000"|First DESK release
+
 
 
|-
 
|-
 
|}
 
|}
−
<section end=History/>
+
<section end="History" />
−
<section begin=Body/>
+
<section begin="Body" />
  
 
==Peripheral CAN ==
 
==Peripheral CAN ==
 +
{{ImportantMessage|text=The CAN peripheral is not available on [[AXEL_ULite_SOM/AXEL_ULite_Evaluation_Kit | AXEL ULite EVK]]. This peripheral is available on the i.MX6UL standard product [[SBC_Lynx_SBC | SBCLynx]]}}
  
 
=== Device tree configuration ===
 
=== Device tree configuration ===
 
Here below an example of device tree configuration used on standard DAVE's kit for the [[AXEL ULite SOM]]:
 
Here below an example of device tree configuration used on standard DAVE's kit for the [[AXEL ULite SOM]]:
  
−
From <code>imx6ul-lynx-som0013-cb00XX.dts</code>:
+
From <code>imx6ul-lynx-som0013-cb002f.dts</code>:
  
 
<pre>
 
<pre>
Line 57: Line 61:
 
...
 
...
 
...
 
...
−
[    2.717142] flexcan 2090000.flexcan: 2090000.flexcan supply xceiver not found, using dummy regulator
+
[    3.047454] can: controller area network core
−
[    2.728107] flexcan 2090000.flexcan: device registered (reg_base=a099c000, irq=24)
+
[    3.057221] can: raw protocol
 +
[    3.069417] can: broadcast manager protocol
 +
[    3.073846] can: netlink gateway - max_hops=1
 
...
 
...
 
...
 
...
−
[    5.067979] can: controller area network core (rev 20170425 abi 9)
 
−
[    5.079006] can: raw protocol (rev 20170425)
 
−
[    5.083391] can: broadcast manager protocol (rev 20170425 t)
 
−
[    5.089108] can: netlink gateway (rev 20170425) max_hops=1
 
 
</pre>
 
</pre>
  
 
====Enable the interface and check status====
 
====Enable the interface and check status====
 
<pre class="workstation-terminal">
 
<pre class="workstation-terminal">
−
root@desk-mx6ul-axelulite:~# ip link set can0 type can bitrate 500000
+
root@desk-mx6ul-lynx:~# ip link set can0 type can bitrate 500000
−
root@desk-mx6ul-axelulite:~# ifconfig can0 up
+
root@desk-mx6ul-lynx:~# ifconfig can0 up
−
root@desk-mx6ul-axelulite:~# ifconfig can0
+
root@desk-mx6ul-lynx:~# ifconfig can0
−
can0     Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
+
can0: flags=193<UP,RUNNING,NOARP> mtu 16
−
          UP RUNNING NOARP MTU:16 Metric:1
+
        unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  txqueuelen 10 (UNSPEC)
−
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
+
        RX packets 0 bytes 0 (0.0 B)
−
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
+
        RX errors 0 dropped 0 overruns 0 frame 0
−
          collisions:0 txqueuelen:10
+
        TX packets 0 bytes 0 (0.0 B)
−
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
+
        TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
−
          Interrupt:24
+
        device interrupt 33
−
 
 
−
root@desk-mx6ul-axelulite:~#
 
 
</pre>
 
</pre>
  
 
==== Usage with [https://github.com/linux-can/can-utils can-utils] ====
 
==== Usage with [https://github.com/linux-can/can-utils can-utils] ====
−
 
−
''TBD: reference verso eventuali informazioni sul web''
 
  
 
<pre class="workstation-terminal">
 
<pre class="workstation-terminal">
−
root@desk-mx6ul-axelulite:~# ip link set can0 type can bitrate 500000 triple-sampling on
+
root@desk-mx6ul-lynx:~# ip link set can0 type can bitrate 500000 triple-sampling on loopback on
−
root@desk-mx6ul-axelulite:~# ifconfig can0 up
+
root@desk-mx6ul-lynx:~# ifconfig can0 up
−
root@desk-mx6ul-axelulite:~# cansend can0 128#1122334455667788
+
root@desk-mx6ul-lynx:~# candump can0 &
−
root@desk-mx6ul-axelulite:~# candump can0
+
[1] 291
−
  can0 128  [8] 11 22 33 44 55 66 77 88
+
interface = can0, family = 29, type = 3, proto = 1
−
root@desk-mx6ul-axelulite:~#
+
root@desk-mx6ul-lynx:~# cansend can0 -i 0x7ff 00 01 02 03 04 05 06 07
 +
interface = can0, family = 29, type = 3, proto = 1
 +
<0x7ff> [8] 00 01 02 03 04 05 06 07
 +
<0x7ff> [8] 00 01 02 03 04 05 06 07
 
</pre>
 
</pre>
  
Line 99: Line 100:
 
Each CAN port appears like a networking interface in the form <code>canX</code> where <b><i>X</i></b> is the port number.  
 
Each CAN port appears like a networking interface in the form <code>canX</code> where <b><i>X</i></b> is the port number.  
  
−
Information about programming the CAN socket interface is given in the kernel tree under ''Documentation/networking/can.txt''
+
Information about programming the CAN socket interface is given in the kernel tree under ''Documentation/networking/can.rst''
−
<section end=Body/>
+
<section end="Body" />
−
 
 
 
----
 
----
  
 
[[Category:AXEL ULite]]
 
[[Category:AXEL ULite]]

Latest revision as of 17:58, 11 January 2024

HOME SOMs SBCs ToloMEO Embedded Assistant Sale-tag.pngGET A QUOTE Customer-service.pngONLINE HELPDESK
Roadmap IoT Services ML/AI services Embedded Design Services
History
Issue Date Notes

2021/07/20

First DESK-MX6UL-L release

2022/03/16

DESK-MX6UL-L 3.0.0 release
2023/05/04 DESK-MX6UL-L 4.0.0 release


Peripheral CAN[edit | edit source]

200px-Emblem-important.svg.png

The CAN peripheral is not available on AXEL ULite EVK. This peripheral is available on the i.MX6UL standard product SBCLynx

Device tree configuration[edit | edit source]

Here below an example of device tree configuration used on standard DAVE's kit for the AXEL ULite SOM:

From imx6ul-lynx-som0013-cb002f.dts: 

&can1 {
    pinctrl-names = "default";
    pinctrl-0 = <&pinctrl_flexcan1>;
    status = "okay";
};

From imx6ul-lynx-som0013.dtsi: 

&iomuxc {
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_hog_gpios>;

        imx6ul-lynx {
...
...
            pinctrl_flexcan1: flexcan1grp{
                    fsl,pins = <
                            MX6UL_PAD_LCD_DATA09__FLEXCAN1_RX       0x1b020
                            MX6UL_PAD_LCD_DATA08__FLEXCAN1_TX       0x1b020
                    >;
            };
};

Accessing the peripheral[edit | edit source]

Linux messages at boot time[edit | edit source]

...
...
[    3.047454] can: controller area network core
[    3.057221] can: raw protocol
[    3.069417] can: broadcast manager protocol
[    3.073846] can: netlink gateway - max_hops=1
...
...

Enable the interface and check status[edit | edit source]

root@desk-mx6ul-lynx:~# ip link set can0 type can bitrate 500000
root@desk-mx6ul-lynx:~# ifconfig can0 up
root@desk-mx6ul-lynx:~# ifconfig can0
can0: flags=193<UP,RUNNING,NOARP>  mtu 16
        unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  txqueuelen 10  (UNSPEC)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 33

Usage with can-utils[edit | edit source]

root@desk-mx6ul-lynx:~# ip link set can0 type can bitrate 500000 triple-sampling on loopback on
root@desk-mx6ul-lynx:~# ifconfig can0 up
root@desk-mx6ul-lynx:~# candump can0 &
[1] 291
interface = can0, family = 29, type = 3, proto = 1
root@desk-mx6ul-lynx:~# cansend can0 -i 0x7ff 00 01 02 03 04 05 06 07 
interface = can0, family = 29, type = 3, proto = 1
<0x7ff> [8] 00 01 02 03 04 05 06 07 
<0x7ff> [8] 00 01 02 03 04 05 06 07

Additional information[edit | edit source]

Each CAN port appears like a networking interface in the form canX where X is the port number.

Information about programming the CAN socket interface is given in the kernel tree under Documentation/networking/can.rst

HOME SOMs SBCs ToloMEO Embedded Assistant Sale-tag.pngGET A QUOTE Customer-service.pngONLINE HELPDESK
Roadmap IoT Services ML/AI services Embedded Design Services
Retrieved from "https://wiki.dave.eu/index.php?title=DESK-MX6UL-L/Peripherals/CAN&oldid=19693"