- From: SA <n0td1scl0s3d_at_ntlworld.com>
- Date: Sun, 14 Aug 2005 16:01:13 +0100
I have made some progress with some of my questions (1) I still don't know how to do AO (2) Impedance changes re quire the use of a soldering iron (3) I don't understand how the DIO subsystem works (since the are no commands available) but it just works fine with comedi_dio_write and comedi_dio_read. If anyone knows how to make the AO work please let me know, cheers, SA On Sunday 14 Aug 2005 15:38, walt wrote: > I know almost nothing myself, but I am familiar with the sense of general > bafflement from when I first arrived here. > > Have you downloaded the comedi manual documentation & tried the comedi > function calls in chapter 7, for example, comedi_write_data, > comedi_dio_read, comedi_dio_write? > > I am not familiar with setting input impedance. The cards I use don't have > this capability. > > Walt > > On Sunday 14 August 2005 08:34, SA wrote: > > Dear List, > > > > Apologies for the newbie questions... > > > > I have successfully comiled and installed comedi for my pci-das4020/12 > > card using the patch that Frank suggested. Using this I have manage to > > successfully run the inpn demo which works fine. > > > > Could someone tell me how to: > > > > (1) use the analogue outputs? > > (2) set the input impedance? > > (3) can I use the DIOs even though there is no command support (the dio > > demo seems to run with dio -s 4)? > > > > If I run the info demo (output below) it tells me I have 10 subdevices > > with subdevice 0 being AI, 1 being AO and 4 being DIOs. This also tells > > me that I have a few commands for AI but no commands for AO or DIO. > > > > I am now thoughly confused - any advice gratefully received. > > > > Thanks, > > > > SA > > > > ----- info > > lspci -v > > ... > > 00:0c.0 Class ffff: Measurement Computing PCI-DAS4020/12 (rev 02) > > (prog-if ff) Subsystem: Measurement Computing: Unknown device 0000 > > Flags: bus master, medium devsel, latency 64, IRQ 177 > > Memory at f7a00000 (32-bit, non-prefetchable) [size=256] > > I/O ports at ec00 [size=256] > > Memory at f7900000 (32-bit, non-prefetchable) [size=4K] > > Memory at f7800000 (32-bit, non-prefetchable) [size=4K] > > Expansion ROM at f7700000 [disabled] [size=2K] > > ... > > > > info -f /dev/comedi0 > > overall info: > > version code: 0x000746 > > driver name: cb_pcidas64 > > board name: pci-das4020/12 > > number of subdevices: 10 > > subdevice 0: > > type: 1 (analog input) > > number of channels: 4 > > max data value: 4095 > > ranges: > > all chans: [-5,5] [-1,1] > > command: > > start: now|ext > > scan_begin: timer|other > > convert: now|timer > > scan_end: count > > stop: none|count|ext > > command fast 1chan: > > start: now 0 > > scan_begin: timer 0 > > convert: timer 0 > > scan_end: count 1 > > stop: count 2 > > subdevice 1: > > type: 2 (analog output) > > number of channels: 2 > > max data value: 4095 > > ranges: > > all chans: [-5,5] [-10,10] > > command: > > not supported > > subdevice 2: > > type: 0 (unused) > > subdevice 3: > > type: 0 (unused) > > subdevice 4: > > type: 5 (digital I/O) > > number of channels: 24 > > max data value: 1 > > ranges: > > all chans: [0,5] > > command: > > not supported > > subdevice 5: > > type: 0 (unused) > > subdevice 6: > > type: 9 (calibration) > > number of channels: 8 > > max data value: 4095 > > ranges: > > all chans: [0,1] > > command: > > not supported > > subdevice 7: > > type: 0 (unused) > > subdevice 8: > > type: 8 (memory) > > number of channels: 128 > > max data value: 65535 > > ranges: > > all chans: [0,1] > > command: > > not supported > > subdevice 9: > > type: 0 (unused) > > > > cat /proc/comedi > > comedi version 0.7.70 > > format string: "%2d: %-20s %-20s > > %4d",i,driver_name,board_name,n_subdevices 0: cb_pcidas64 > > pci-das4020/12 10 > > 1: 8255 8255 1 > > cb_pcidas64: > > cb_pcidas64 > > 8255: > > 8255 > > > > /sbin/lsmod > > Module Size Used by > > cb_pcidas64 32004 0 > > 8255 6016 1 cb_pcidas64 > > comedi_fc 3456 1 cb_pcidas64 > > comedi 31776 3 cb_pcidas64,8255,comedi_fc > > > > _______________________________________________ > > comedi mailing list > > comedi_at_comedi.org > > https://cvs.comedi.org/cgi-bin/mailman/listinfo/comedi > > _______________________________________________ > comedi mailing list > comedi_at_comedi.org > https://cvs.comedi.org/cgi-bin/mailman/listinfo/comedi
Received on 2005-08-14Z14:01:13