topic Re: CAN to LIN conversion in i.MX Processors

CAN to LIN conversion

pankajrana — Thu, 17 Jul 2014 05:07:34 GMT

hi,

Working with iMx6-solo is it possible to use LIN Bus interface.?

Is it possible to use the LIN bus interface through the CAN interface available in the processor? or any other possibilities ?

Thanks.

Regards,

Pankaj Rana

Re: CAN to LIN conversion

Pavel — Thu, 17 Jul 2014 10:38:45 GMT

You can use UART controller for LIN communication. The LIN protocol is UART base protocol.

See the following pages

(http://rtime.felk.cvut.cz/can/sllin-rtlws14-paper.pdf)

(http://www.mikroe.com/downloads/get/1507/lin_manual_v100.pdf)

(http://en.wikipedia.org/wiki/Local_Interconnect_Network).

Find also the LINOVERVIEWPRESENT.ppt document from Freescale in internet.

Re: CAN to LIN conversion

pankajrana — Thu, 17 Jul 2014 11:09:12 GMT

Hi Pavel,

Thanks for your reply.

Using the UART interface of iMX6-SOLO for LIN ?

LIN BUS supports 16 slaves , but whereas UART interacts with one device only. So won't this affect the working ? Also the slave addresses will come into account .

I came across some of the RS232-LIN convertors but in the implementation circuit they have used MCUs that support LIN protocol. In iMX6 processors I have not seen any provision for LIN , so I am little worried on it.!

-Pankaj Rana

Re: CAN to LIN conversion

Pavel — Fri, 18 Jul 2014 04:01:37 GMT

LIN transceiver supports using a few slaves on the LIN bus.

You software should supports 16 slaves. Your software should support LIN Frames. LIN frames provides support 16 slaves. See LIN specification.

Re: CAN to LIN conversion

fatalfeel — Fri, 28 Jul 2017 12:14:10 GMT

linux-lin/sllin at master · trainman419/linux-lin · GitHub

and full resource of sllin
https://rtime.felk.cvut.cz/can/lin-bus/

Sllin is TTY discipline enabling you to create LIN Master (and partially LIN Slave) out of your computer.
Hardware needed is Hardware UART embedded into the computer + simple voltage level LIN converter.

Re: CAN to LIN conversion

fatalfeel — Fri, 11 Aug 2017 05:52:17 GMT

sllin.c copy to kernel_imx/drivers/net/can

in Kconfig

### begin: issue ###
config CAN_SLLIN
   tristate "Serial / UART serial CAN Adaptors (sllin)"
   ---help---
      slLIN is TTY line discipline implemented for Linux operating
      system that handles the interchange of LIN messages between
      the underlying UART driver and the CAN bus subsystem.
### end: issue ###

in Makefile add

obj-$(CONFIG_CAN_SLLIN) += sllin.o

in Default config

/kernel_imx/arch/arm/configs/mx6dq_XXXXX_android_defconfig

### begin: issue ###
CONFIG_CAN_SLLIN=y
### end: issue ###

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

success use and need mark some lines and let it compile pass
https://github.com/karelzak/util-linux/blob/master/sys-utils/ldattach.c

in Android.mk
include $(CLEAR_VARS)

LOCAL_SRC_FILES := ldattach.c
LOCAL_MODULE := ldattach
LOCAL_MODULE_TAGS := optional
LOCAL_C_INCLUDES := $(LOCAL_PATH)/include/
LOCAL_CFLAGS := $(PRIVATE_LOCAL_CFLAGS) -DHAVE_NANOSLEEP

include $(BUILD_EXECUTABLE)

Re: CAN to LIN conversion

fatalfeel — Fri, 11 Aug 2017 06:04:04 GMT

File sharing and storage made simple

put it in myandroid/external to build

Re: CAN to LIN conversion

fatalfeel — Mon, 14 Aug 2017 02:14:23 GMT

if use slcan_attach and modify it to sllin_attach

Terminal one
root@matrix_io:/ # sllin_attach -w /dev/ttymxc2
[ 1011.794896] sllin: sllin_open() invoked
[ 1011.795496] sllin: Configured as MASTER
[ 1011.796026] sllin: Baudrate set to 19200
attached tty /dev/ttymxc2 to netdevice sllin0
Press any key to detach /dev/ttymxc2 ...
//now do not press anykey

Terminal Two:

adb shell

find . -print | grep -i 'sllin0'

./sys/devices/virtual/net/sllin0
./sys/devices/virtual/net/sllin0/mtu
./sys/devices/virtual/net/sllin0/type
./sys/devices/virtual/net/sllin0/phys_port_name
./sys/devices/virtual/net/sllin0/netdev_group
./sys/devices/virtual/net/sllin0/flags

//success too

Re: CAN to LIN conversion

fatalfeel — Wed, 16 Aug 2017 04:09:44 GMT

UART to LinBUS

RS232 to Lin Bus

Programming Guide: Uart to LinBus

source download:
http://www.mediafire.com/file/klyz9gf8eytj999/sllincanutils.tar.gz

Re: CAN to LIN conversion

fatalfeel — Mon, 28 Aug 2017 05:30:37 GMT

if you use canutils u need roll back to fit sllin

GitHub - linux-can/can-utils: Linux-CAN / SocketCAN user space applications

version

Author: Oliver Hartkopp <socketcan@hartkopp.net> 2012-07-22 19:06:06
Committer: Oliver Hartkopp <socketcan@hartkopp.net> 2012-07-22 19:06:06

Re: CAN to LIN conversion

fatalfeel — Wed, 30 Aug 2017 02:10:38 GMT

new source download

Programming Guide: Uart to LinBus

here is blogger and modify iplink reopen crash bug

can-utils use

version

Author: Oliver Hartkopp <socketcan@hartkopp.net> 2012-07-22 19:06:06
Committer: Oliver Hartkopp <socketcan@hartkopp.net> 2012-07-22 19:06:06

can pass param to swicth master slave and baud rate