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1 | ------------------------------------------------------------------------------- | |
2 | README.devices | |
3 | ------------------------------------------------------------------------------- | |
4 | ||
5 | This README contains various notes for users of libsigrok (or frontends | |
6 | that are based on libsigrok) about device- and/or driver-specific issues. | |
7 | ||
8 | ||
9 | Firmware | |
10 | -------- | |
11 | ||
12 | Some devices supported by libsigrok need a firmware to be uploaded every time | |
13 | the device is connected to the PC (usually via USB), before it can be used. | |
14 | ||
15 | The default location where libsigrok expects the firmware files is: | |
16 | ||
17 | $prefix/share/sigrok-firmware | |
18 | ||
19 | ($prefix is usually /usr/local or /usr, depending on your ./configure options) | |
20 | ||
21 | For further information see the section below and also: | |
22 | ||
23 | http://sigrok.org/wiki/Firmware | |
24 | ||
25 | ||
26 | Per-driver firmware requirements | |
27 | -------------------------------- | |
28 | ||
29 | The following drivers/devices require a firmware upload upon connection: | |
30 | ||
31 | - asix-sigma: The ASIX SIGMA and SIGMA2 require various firmware files, | |
32 | depending on the settings used. These files are available from our | |
33 | 'sigrok-firmware' repository/project under a license which allows us | |
34 | to redistribute them. | |
35 | ||
36 | - fx2lafw: Logic analyzers based on the Cypress FX2(LP) chip need the | |
37 | firmware files from the 'sigrok-firmware-fx2lafw' repository/project. | |
38 | The firmware is written from scratch and licensed under the GPLv2+. | |
39 | ||
40 | - hantek-dso: The Hantek DSO-2090 (and other supported models of the same | |
41 | series of Hantek PC oscilloscopes) need firmware files. | |
42 | These can be extracted from the vendor's Windows drivers using a tool | |
43 | from our 'sigrok-util' repository/project. | |
44 | ||
45 | The following drivers/devices do not need any firmware upload: | |
46 | ||
47 | - agilent-dmm | |
48 | - alsa | |
49 | - brymen-dmm | |
50 | - chronovu-la8 | |
51 | - colead-slm | |
52 | - demo | |
53 | - fluke-dmm | |
54 | - lascar-el-usb | |
55 | - mic-985xx | |
56 | - openbench-logic-sniffer | |
57 | - rigol-ds1xx2 | |
58 | - serial-dmm | |
59 | - tondaj-sl-814 | |
60 | - uni-t-dmm | |
61 | - victor-dmm | |
62 | - zeroplus-logic-cube | |
63 | ||
64 | ||
65 | Specifying serial ports | |
66 | ----------------------- | |
67 | ||
68 | Many devices supported by libsigrok use serial port based cables (real RS232 | |
69 | or USB-to-serial ones) to connect to a PC. | |
70 | ||
71 | For all these devices, you need to specify the serial port they are connected | |
72 | to (e.g. using the 'conn' option in sigrok-cli). It is not possible to scan | |
73 | for such devices without specifying a serial port. | |
74 | ||
75 | Example: | |
76 | ||
77 | $ sigrok-cli --driver <somedriver>:conn=/dev/ttyUSB0 ... | |
78 | ||
79 | The following drivers/devices require a serial port specification: | |
80 | ||
81 | - agilent-dmm | |
82 | - brymen-dmm | |
83 | - colead-slm | |
84 | - fluke-dmm | |
85 | - mic-985xx | |
86 | - openbench-logic-sniffer | |
87 | - serial-dmm | |
88 | - tondaj-sl-814 | |
89 | ||
90 | The following drivers/devices do not require a serial port specification: | |
91 | ||
92 | - alsa | |
93 | - asix-sigma | |
94 | - chronovu-la8 | |
95 | - demo | |
96 | - fx2lafw | |
97 | - hantek-dso | |
98 | - lascar-el-usb | |
99 | - rigol-ds1xx2 | |
100 | - uni-t-dmm | |
101 | - victor-dmm | |
102 | - zeroplus-logic-cube | |
103 | ||
104 | ||
105 | Permissions of serial port based devices | |
106 | ---------------------------------------- | |
107 | ||
108 | When using devices supported by libsigrok that use serial port based cables | |
109 | (real RS232 or USB-to-serial ones) to connect to a PC, you need to ensure | |
110 | that the user running the libsigrok frontend has (read/write) permissions to | |
111 | access the serial port device (e.g. /dev/ttyS0, /dev/ttyUSB0, and so on). | |
112 | ||
113 | You can use 'chmod' to apply permissions as you see fit, and/or 'chown' to | |
114 | change the owner of the serial port device to a certain user or group. | |
115 | ||
116 | For USB-to-serial based devices, we recommended using our udev rules file | |
117 | (see below for details). | |
118 | ||
119 | ||
120 | Permissions for USB devices (udev rules file) | |
121 | --------------------------------------------- | |
122 | ||
123 | When using USB-based devices supported by libsigrok, the user running the | |
124 | libsigrok frontend (e.g. sigrok-cli) has to have (read/write) permissions | |
125 | for the respective USB device. | |
126 | ||
127 | On Linux, this is accomplished using either 'chmod' (not recommended) or | |
128 | using the udev rules file shipped with libsigrok (recommended). | |
129 | ||
130 | The file is available in contrib/z60_libsigrok.rules. It contains entries | |
131 | for all libsigrok-supported (USB-based) devices and changes their group | |
132 | to 'plugdev' and the permissions to '664'. | |
133 | ||
134 | When using a libsigrok package from your favorite Linux distribution, the | |
135 | packager will have already taken care of properly installing the udev file | |
136 | in the correct (distro-specific) place, and you don't have to do anything. | |
137 | The packager might also have adapted 'plugdev' and '664' as needed. | |
138 | ||
139 | If you're building from source, you need to copy the file to the place | |
140 | where your distro expects such files. This is beyond the scope of this README, | |
141 | but generally the location could be e.g. /etc/udev/rules.d, or maybe | |
142 | /lib/udev/rules.d, or something else. Afterwards you might have to restart | |
143 | udev, e.g. via '/etc/init.d/udev restart' or similar, and you'll have to | |
144 | re-attach your device via USB. | |
145 | ||
146 | Please consult the udev docs of your distro for details. | |
147 | ||
148 | ||
149 | Cypress FX2 based devices | |
150 | ------------------------- | |
151 | ||
152 | Devices using the Cypress FX2(LP) chip without any specific USB VID/PID will | |
153 | be enumerated with VID/PID 04b4:8613 (the default for "unconfigured FX2"). | |
154 | These are usually "FX2 eval boards" (that can also be used as LAs, though). | |
155 | ||
156 | On Linux, the 'usbtest' driver will usually grab such devices, and they will | |
157 | thus not be usable by libsigrok (and frontends). | |
158 | ||
159 | You can fix this by running 'rmmod usbtest' as root before using the device. | |
160 | ||
161 | ||
162 | UNI-T DMM (and rebranded models) cables | |
163 | --------------------------------------- | |
164 | ||
165 | UNI-T multimeters (and rebranded devices, e.g. some Voltcraft models) can | |
166 | ship with different PC connectivity cables: | |
167 | ||
168 | - UT-D04 (USB/HID cable with Hoitek HE2325U chip, USB VID/PID 04fa:2490) | |
169 | - UT-D04 (USB/HID cable with WCH CH9325 chip, USB VID/PID 1a86:e008) | |
170 | - UT-D02 (RS232 cable) | |
171 | ||
172 | The above cables are all physically compatible (same IR connector shape) | |
173 | with all/most currently known UNI-T multimeters. For example, you can | |
174 | use either of the UT-D04 USB/HID cables or the UT-D02 RS232 cable with | |
175 | the UNI-T UT61D multimeter. | |
176 | ||
177 | When using the UT-D02 RS232 cable with any of the supported UNI-T DMMs, | |
178 | you have to use the respective driver with a '-ser' drivername suffix | |
179 | (internally all of these models are handled by the 'serial-dmm' driver). | |
180 | ||
181 | You also need to specify the serial port via the 'conn' option, e.g. | |
182 | /dev/ttyUSB0 (attached via a USB-to-serial cable) or /dev/ttyS0 (actual | |
183 | RS232 port) on Linux (see above). | |
184 | ||
185 | Finally, the user running the frontend (e.g. sigrok-cli) also needs | |
186 | permissions to access the respective serial port (see above). | |
187 | ||
188 | Examples (sigrok-cli): | |
189 | ||
190 | $ sigrok-cli --driver uni-t-ut61e-ser:conn=/dev/ttyUSB0 ... | |
191 | $ sigrok-cli --driver voltcraft-vc820-ser:conn=/dev/ttyS0 ... | |
192 | ||
193 | When using any of the UT-D04 USB/HID cables you have to use the respective | |
194 | driver _without_ the '-ser' drivername suffix (internally all of these models | |
195 | are handled by the 'uni-t-dmm' driver). | |
196 | ||
197 | Since the UT-D04 cables are USB based (but don't use a USB-to-serial chip) | |
198 | there is no need to specify a serial port via 'conn', of course. | |
199 | However, the user running the frontend does also need to have permissions | |
200 | to access the respective USB device (see above). | |
201 | ||
202 | Examples (sigrok-cli): | |
203 | ||
204 | $ sigrok-cli --driver uni-t-ut61e ... | |
205 | $ sigrok-cli --driver voltcraft-vc820 ... | |
206 | ||
207 | ||
208 | UNI-T UT-D04 cable issue on Linux | |
209 | --------------------------------- | |
210 | ||
211 | The UNI-T UT-D04 cable with Hoitek HE2325U (or WCH CH9325) chip seems to have | |
212 | a very specific problem on Linux. Apparently it requires to be put into | |
213 | suspend (and woken up again) before it is usable. This seems to be a | |
214 | Linux-only issue, Windows is not affected by this since apparently the | |
215 | Windows kernel does this for every USB device, always. | |
216 | ||
217 | Thus, if you want to use any of the UNI-T DMMs with this specific cable, | |
218 | you'll have to run the following script (as root) once, every time you attach | |
219 | the cable via USB. The script was written by Ralf Burger. | |
220 | ||
221 | See also: http://erste.de/UT61/index.html | |
222 | ||
223 | #!/bin/bash | |
224 | for dat in /sys/bus/usb/devices/*; do | |
225 | if test -e $dat/manufacturer; then | |
226 | grep "WCH.CN" $dat/manufacturer > /dev/null && echo auto > ${dat}/power/level && echo 0 > ${dat}/power/autosuspend | |
227 | fi | |
228 | done | |
229 | ||
230 | ||
231 | Enabling multimeter / data logger measurement output | |
232 | ---------------------------------------------------- | |
233 | ||
234 | Some multimeters or data loggers will not start outputting measurement data | |
235 | unless a certain action has been performed by the user beforehand. This is | |
236 | usually mentioned in the vendor manual of the respective device, but here's | |
237 | a short list for convenience: | |
238 | ||
239 | - Digitek DT4000ZC: Briefly press the "RS232" button. | |
240 | - PCE PCE-DM32: Briefly press the "RS232" button. | |
241 | - RadioShack 22-812: Press and hold "SELECT" and "RANGE" together. | |
242 | - TekPower TP4000ZC: Briefly press the "RS232" button. | |
243 | - UNI-T UT61D: Press the "REL/RS232/USB" button for roughly 1 second. | |
244 | - V&A VA18B: Keep the "Hz/DUTY" key pressed while powering on the device. | |
245 | - Victor 70C: Press the "REL/RS232" button for roughly 1 second. | |
246 | - Victor 86C: Press the "REL/RS232" button for roughly 1 second. | |
247 | ||
248 | ||
249 | ALSA driver | |
250 | ----------- | |
251 | ||
252 | The 'alsa' driver can be used to sample analog data using a PC's soundcard. | |
253 | I.e. the sound card can act as a simple oscilloscope (with some limitations) | |
254 | using commercial or DIY "sound card scope probe" cables. | |
255 | ||
256 | Since ALSA is a Linux-specific sound system, this driver will inherently | |
257 | only compile and work on Linux. | |
258 | ||
259 | We might write additional drivers to make a similar functionality available | |
260 | on other OSes at some point. | |
261 | ||
262 | ||
263 | ChronoVu LA8 USB VID/PIDs | |
264 | ------------------------- | |
265 | ||
266 | The ChronoVu LA8 logic analyzer is available in two revisions. Previously, | |
267 | the LA8 shipped with a USB VID/PID of 0403:6001, which is the standard ID | |
268 | for FTDI FT232 USB chips. | |
269 | ||
270 | Since this made it hard to distinguish the LA8 from any other device | |
271 | with this FTDI chip connected to the PC, the vendor later shipped the | |
272 | LA8 with a USB VID/PID of 0403:8867. | |
273 | ||
274 | The 'chronovu-la8' driver in libsigrok supports both VID/PID pairs and | |
275 | automatically finds devices with either VID/PID pair. However, currently | |
276 | the driver will assume any device with VID/PID 0403:6001 is a ChronoVu LA8. | |
277 | ||
278 | ||
279 | OLS | |
280 | --- | |
281 | ||
282 | The Dangerous Prototypes Openbench Logic Sniffer (OLS) logic analyzer is | |
283 | supported by the 'ols' driver in libsigrok. This driver assumes a somewhat | |
284 | recent firmware has been flashed onto the OLS (it doesn't need a firmware | |
285 | upload every time it's attached via USB, since the firmware is stored in the | |
286 | device permanently). | |
287 | ||
288 | The most recent firmware version that is tested is 3.07. | |
289 | ||
290 | If you use any older firmware and your OLS is not found or is not working | |
291 | properly, please upgrade to at least this firmware version. Check the | |
292 | Dangerous Prototypes wiki for firmware upgrade instructions: | |
293 | ||
294 | http://dangerousprototypes.com/docs/Logic_Sniffer_upgrade_procedure | |
295 | ||
296 | Also, you need to specify a serial port for the OLS in the frontends, e.g. | |
297 | using the 'conn' option in sigrok-cli, and you also need to have the | |
298 | permissions to access the serial port (see above). | |
299 | ||
300 | Example: | |
301 | ||
302 | $ sigrok-cli --driver ols:conn=/dev/ttyACM0 ... | |
303 | ||
304 | ||
305 | Rigol DS1xx2 oscilloscopes | |
306 | -------------------------- | |
307 | ||
308 | The 'rigol-ds1xx2' driver (for the Rigol DS1052E and some other, similar DSOs) | |
309 | currently uses the Linux usbtmc kernel driver. This means it can currently | |
310 | only be built and used on Linux (i.e., it's non-portable). | |
311 | ||
312 | The use of a kernel module also means it is dependent on the kernel version | |
313 | used, as well as on whether this specific module is available in the kernel. | |
314 | Additionally, the usbtmc kernel module has been known to have various bugs | |
315 | in some versions. These are some (but not all) drawbacks of using a kernel | |
316 | module as opposed to a libusb-based driver that works in user-space. | |
317 | ||
318 | We plan to change the driver to use the 'librevisa' user-space shared | |
319 | library (which uses libusb) soon, which will fix all these issues and make | |
320 | the driver portable at the same time. | |
321 |