Re: [Xenomai-core] Analogy DIO speed

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

Hi,

Stefan Schaal wrote:
> Hi Alexis,
> 
> On Feb 18, 2010, at 14:34, Alexis Berlemont wrote:
> 
>> I have some problems with
>>> implementing commands on my NI6259 so far.
>> Could you remind me what was the problem ?
> 
> See the print-outs below for the problem we have.
> 
> Thanks so much for looking into this!
> 
> -Stefan
> 
> 
> 
> 
> Using the cmd_write() function that you provide in analogy, we get the following problem:
> 
I am currently trying to fix this bug, which is not that easy. I just
have one question (that I remember I have already asked you in some way,
but I just want to be sure):
Does this bug occur the very first time you launched cmd_write (I mean
after a reboot) ?

> root@domain.hid# ./cmd_write -v
> cmd_write: device analogy0 opened (fd=0)
> cmd_write: basic descriptor retrieved
> 	 subdevices count = 14
> 	 read subdevice index = 0
> 	 write subdevice index = 1
> cmd_write: complex descriptor retrieved
> cmd_write: channel 0
> 	 ranges count = 3
> 	 range's size = 16 (bits)
> cmd_write: channel 1
> 	 ranges count = 3
> 	 range's size = 16 (bits)
> cmd_write: scan size = 4
> cmd_write: size to write  = 400
> cmd_write: command successfully sent
> cmd_write: triggering failed (ret=-32)
> 
> root@domain.hid# dmesg -c
> [133345.213865] Analogy: analogy_ni_pcimio: ni_mio_common: interrupt: b_status=0002 m1_status=80a80000
> [133345.332719] Analogy: analogy_ni_pcimio: ni_ao_wait_for_dma_load: timed out waiting for dma load<3>Analogy: a4l_do_special_insn: execution of the instruction failed (err=-32)
> 
> 
> Another problem we have is with the --mmap option:
> 
> root@domain.hid# ./cmd_write -v --mmap
> cmd_write: device analogy0 opened (fd=0)
> cmd_write: basic descriptor retrieved
> 	 subdevices count = 14
> 	 read subdevice index = 0
> 	 write subdevice index = 1
> cmd_write: complex descriptor retrieved
> cmd_write: channel 0
> 	 ranges count = 3
> 	 range's size = 16 (bits)
> cmd_write: channel 1
> 	 ranges count = 3
> 	 range's size = 16 (bits)
> cmd_write: scan size = 4
> cmd_write: size to write  = 400
> cmd_write: buffer size = 65536 bytes
> cmd_write: a4l_mmap() failed (ret=-22)
> 
> 
> root@domain.hid# dmesg -c
> [133408.942998] Analogy: a4l_ioctl_mmap: mmap not allowed on this subdevice
> 
> 

Alexis.