Re: [Xenomai-help] [Socketcan-users] RT - Socketcan

[Wolfgang Grandegger <wg@domain.hid>]

Hi Breno,

first I moved this thread to the Xenomai-Help ML, because it's off-topic
on the Socket-CAN ML. Only questions related to the Socket-CAN API or
Linux Socket-CAN implementation should be send there.

Wolfgang Grandegger wrote:
> Breno wrote:
>> Wolfgang Grandegger wrote:
> [...deletions...]
> 
>>>>>> Wolfgang, that's seems to work perfectly. I got another simple(very
>>>>>> simple) question. Follow the commands:
>>>>>> *
>>>>>> sh-3.00# ./rtcanrecv rtcan1 &
>>>>>>
>>>>>> *[1] 950
>>>>>> *sh-3.00# ./rtcanrecv rtcan1 &*
>>>>>> *sh-3.00# ./rtcansend rtcan0 -i123 A B C D E F G H*
>>>>>>
>>>>>> #0: (2) <0x07b> [8] 00 00 00 00 00 00 00
>>>>>>
>>>>>> So, I received correctly the ID message the length but the data is 00.
>>>>>> Is there any configuration missing?
>>>>>>     
>>>>>>         
>>>>> You have to specify the message bytes correctly.
>>>>>
>>>>> ./rtcansend rtcan0 -i0x123 0xA 0xB 0xC 0xD 0xE 0xF
>>>>>
>>>>> should work better.
>>>>>
>>>>> Wolfgang.
>>>>>   
>>>>>       
>>>> Wolfgang, that's weird! I did your suggestion and I got:
>>>>
>>>> *sh-3.00# ./rtcansend rtcan0 -i0x123 0xA 0xB 0xC 0xD 0xE 0xF*
>>>> #0: (2) <0x123> [6] 00 00 00 0d 0e 0f
>>>>
>>>> It seems losing some packages, isn't it?
>>>>     
>>> Wired, could you try:
>>>
>>> ./rtcansend -v -i0x123 rtcan0 0xA 0xB 0xC 0xD 0xE 0xF
>>> ./rtcansend -v -i0x123 rtcan0 1 2 3 4 5 6 7 8
>>>
>>> Wolfgang.
>>>
>>>   
>> Hi Wolfgang, I got the messages below with verbose enable as you 
>> suggested me.*
>>
>> sh-3.00# ./rtcansend rtcan0 -v -i0x123 0xA 0xB 0xC 0xD 0xE 0xF 0xG*
>> interface rtcan0
>> s=1, ifr_name=rtcan0
>> <0x123> [7] 0a 0b 0c 0d 0e 0f 00
>> Cleaning up...
>> #1: (2) <0x123> [7] 00 00 00 0d 0e 0f 00
>> *sh-3.00# ./rtcansend rtcan0 -v -i0x123 0xA 0xB 0xC 0xD 0xE 0xF 0xG*
>> interface rtcan0
>> s=1, ifr_name=rtcan0
>> <0x123> [7] 0a 0b 0c 0d 0e 0f 00
>> Cleaning up...
>> #2: (2) <0x123> [7] 00 00 00 0d 0e 0f 00
> 
> The last "00" is OK because 0xG is not a valid hexadecimal number...
> 
>> *sh-3.00# ./rtcansend rtcan0 -v -i0x123 1 2 3 4 5 6 7 8            *
>> interface rtcan0
>> s=1, ifr_name=rtcan0
>> <0x123> [8] 01 02 03 04 05 06 07 08
>> Cleaning up...
>> #4: (2) <0x123> [8] 00 00 00 04 05 06 07 08
>>
>> When you say wired, means I think that it could be a connection problem?
> 
> ... but the first 3 are wired and I'm really puzzled why that happens. I
> have to try myself. I do not believe that it's a connection problem. Do
> you have a CAN Bus analyzer?

How have you built rtcansend and rtcanrecv? Please use the binaries made
and installed by "make install".

Wolfgang.