Re: [Xenomai-core] Analogy: cmd_bits

[Alexis Berlemont <alexis.berlemont@domain.hid>]

Hi,

Stefan Schaal wrote:
> I tried the new cmd_bits function today to use commands to write to a DIO device on my NI6259 board (thanks a lot, Alexis, for starting this!). Unfortunately, cmd_bits terminates with an error:
> 
> root@domain.hid> ./cmd_bits -v -s 2 0xffffffff 0xffffffff
> cmd_bits: device analogy0 opened (fd=0)
> cmd_bits: basic descriptor retrieved
> 	 subdevices count = 14
> 	 read subdevice index = 0
> 	 write subdevice index = 1
> cmd_bits: complex descriptor retrieved
> cmd_bits: selected subdevice index = 2
> cmd_bits: command successfully sent
> cmd_bits: a4l_write failed (err=-2) (count=0)       
> (I added a counter in the while loop in cmd_bits.c, and the error occurs immediately after the while loop is entered, i.e., count=0)
> 
> root@domain.hid> dmesg
> [63462.716029] Analogy: a4l_write: idle subdevice

I noticed this bug. I am working on it. This test program disclosed an
annoying bug which needs some time to fix: a4l_async_write() returned
"idle subdevice" because the subdevice index is wrongly retrieved.

> 
> Any thoughts what may cause this error?
> 
> Best wishes,
> 
> -Stefan

-- 
Alexis.