Re: [Xenomai-help] rtcanconfig rtcansend rtcanrecv

[Wolfgang Grandegger <wg@domain.hid>]

Charlton, John wrote:
> I added a kernel module to the xenomai ksrc/drivers/xenomai/can/sja1000.  It builds and installs with make modules_install for linux-2.6.27.7 and xenomai-2.4.6.1.  I am using OpenEmbedded on an i686 NANO-7240 single board computer.  I load the kernal modules and start for two TS_CAN1 CAN boards with the following commands:
> 
> insmod xeno_can_sja1000.ko
> insmod xeno_can_tscan1.ko io=0x100,0x120 irq=5,7
> rtcanconfig rtcan0 --baudrate=125000 start
> rtcanconfig rtcan1 --baudrate=125000 start
> 
> /proc/rtcan/rtcan0/info:
> Device     rtcan0
> Controller SJA1000
> Board      TSCAN1-Board
> Clock-Hz   8000000
> Baudrate   125000
> Bit-time   brp=4 prop_seg=0 phase_seg1=13 phase_seg2=2 sjw=1 sam=0
> Ctrl-Mode
> State      active
> TX-Counter 0
> RX-Counter 0
> Errors     0
> Refcount   0
> 
> /proc/rtcan/rtcan1/info:
> Device     rtcan1
> Controller SJA1000
> Board      TSCAN1-Board
> Clock-Hz   8000000
> Baudrate   125000
> Bit-time   brp=4 prop_seg=0 phase_seg1=13 phase_seg2=2 sjw=1 sam=0
> Ctrl-Mode
> State      active
> TX-Counter 0
> RX-Counter 0
> Errors     0
> Refcount   0
> 
> In one terminal I receive from rtcan0 as follows:
> rtcanrecv rtcan0 --verbose
> interface rtcan0
> s=0, ifr_name=rtcan0
> 
> In a second terminal I send to rtcan1 as follows:
> rtcansend rtcan1 --verbose --identifier=0x123 0xde 0xad
> interface rtcan1
> s=1, ifr_name=rtcan1
> <0x123> [2] de ad
> Cleaning up...
> 
> Nothing happens on the rtcanrecv side--it remains blocked.  If I send a second time the rtcansend side blocks after the s=1, ifr_name=rtcan1 is displayed.

This is a clear indication that the message did not get out to the wire.
What does "/proc/rtcan/rtcan[01}/info" display after you sent the
message? Also check "/proc/xenomai/irq" and use "rtcanrecv -e 0xffff" to
receive error messages as well.

Wolfgang.