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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 | ||
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45 | The following drivers/devices do not need any firmware upload: |
46 | ||
47 | - agilent-dmm | |
48 | - alsa | |
49 | - brymen-dmm | |
45bb47a7 | 50 | - cem-dt-885x |
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51 | - chronovu-la8 |
52 | - colead-slm | |
53 | - demo | |
54 | - fluke-dmm | |
45bb47a7 | 55 | - ikalogic-scanalogic2 |
c77ed446 | 56 | - lascar-el-usb |
7ab89f48 | 57 | - link-mso19 |
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58 | - mic-985xx |
59 | - openbench-logic-sniffer | |
60 | - rigol-ds1xx2 | |
61 | - serial-dmm | |
62 | - tondaj-sl-814 | |
63 | - uni-t-dmm | |
64 | - victor-dmm | |
65 | - zeroplus-logic-cube | |
66 | ||
67 | ||
68 | Specifying serial ports | |
69 | ----------------------- | |
70 | ||
71 | Many devices supported by libsigrok use serial port based cables (real RS232 | |
72 | or USB-to-serial ones) to connect to a PC. | |
73 | ||
74 | For all these devices, you need to specify the serial port they are connected | |
75 | to (e.g. using the 'conn' option in sigrok-cli). It is not possible to scan | |
76 | for such devices without specifying a serial port. | |
77 | ||
78 | Example: | |
79 | ||
80 | $ sigrok-cli --driver <somedriver>:conn=/dev/ttyUSB0 ... | |
81 | ||
82 | The following drivers/devices require a serial port specification: | |
83 | ||
84 | - agilent-dmm | |
85 | - brymen-dmm | |
45bb47a7 | 86 | - cem-dt-885x |
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87 | - colead-slm |
88 | - fluke-dmm | |
7ab89f48 | 89 | - link-mso19 |
c77ed446 | 90 | - mic-985xx |
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91 | - openbench-logic-sniffer |
92 | - serial-dmm | |
93 | - tondaj-sl-814 | |
94 | ||
95 | The following drivers/devices do not require a serial port specification: | |
96 | ||
97 | - alsa | |
98 | - asix-sigma | |
99 | - chronovu-la8 | |
100 | - demo | |
101 | - fx2lafw | |
102 | - hantek-dso | |
45bb47a7 | 103 | - ikalogic-scanalogic2 |
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104 | - lascar-el-usb |
105 | - rigol-ds1xx2 | |
106 | - uni-t-dmm | |
107 | - victor-dmm | |
108 | - zeroplus-logic-cube | |
109 | ||
110 | ||
111 | Permissions of serial port based devices | |
112 | ---------------------------------------- | |
113 | ||
114 | When using devices supported by libsigrok that use serial port based cables | |
115 | (real RS232 or USB-to-serial ones) to connect to a PC, you need to ensure | |
116 | that the user running the libsigrok frontend has (read/write) permissions to | |
117 | access the serial port device (e.g. /dev/ttyS0, /dev/ttyUSB0, and so on). | |
118 | ||
119 | You can use 'chmod' to apply permissions as you see fit, and/or 'chown' to | |
120 | change the owner of the serial port device to a certain user or group. | |
121 | ||
122 | For USB-to-serial based devices, we recommended using our udev rules file | |
123 | (see below for details). | |
124 | ||
125 | ||
126 | Permissions for USB devices (udev rules file) | |
127 | --------------------------------------------- | |
128 | ||
129 | When using USB-based devices supported by libsigrok, the user running the | |
130 | libsigrok frontend (e.g. sigrok-cli) has to have (read/write) permissions | |
131 | for the respective USB device. | |
132 | ||
133 | On Linux, this is accomplished using either 'chmod' (not recommended) or | |
134 | using the udev rules file shipped with libsigrok (recommended). | |
135 | ||
136 | The file is available in contrib/z60_libsigrok.rules. It contains entries | |
137 | for all libsigrok-supported (USB-based) devices and changes their group | |
138 | to 'plugdev' and the permissions to '664'. | |
139 | ||
140 | When using a libsigrok package from your favorite Linux distribution, the | |
141 | packager will have already taken care of properly installing the udev file | |
142 | in the correct (distro-specific) place, and you don't have to do anything. | |
143 | The packager might also have adapted 'plugdev' and '664' as needed. | |
144 | ||
145 | If you're building from source, you need to copy the file to the place | |
146 | where your distro expects such files. This is beyond the scope of this README, | |
147 | but generally the location could be e.g. /etc/udev/rules.d, or maybe | |
148 | /lib/udev/rules.d, or something else. Afterwards you might have to restart | |
149 | udev, e.g. via '/etc/init.d/udev restart' or similar, and you'll have to | |
150 | re-attach your device via USB. | |
151 | ||
152 | Please consult the udev docs of your distro for details. | |
153 | ||
154 | ||
155 | Cypress FX2 based devices | |
156 | ------------------------- | |
157 | ||
158 | Devices using the Cypress FX2(LP) chip without any specific USB VID/PID will | |
159 | be enumerated with VID/PID 04b4:8613 (the default for "unconfigured FX2"). | |
160 | These are usually "FX2 eval boards" (that can also be used as LAs, though). | |
161 | ||
162 | On Linux, the 'usbtest' driver will usually grab such devices, and they will | |
163 | thus not be usable by libsigrok (and frontends). | |
164 | ||
165 | You can fix this by running 'rmmod usbtest' as root before using the device. | |
166 | ||
167 | ||
168 | UNI-T DMM (and rebranded models) cables | |
169 | --------------------------------------- | |
170 | ||
171 | UNI-T multimeters (and rebranded devices, e.g. some Voltcraft models) can | |
172 | ship with different PC connectivity cables: | |
173 | ||
174 | - UT-D04 (USB/HID cable with Hoitek HE2325U chip, USB VID/PID 04fa:2490) | |
175 | - UT-D04 (USB/HID cable with WCH CH9325 chip, USB VID/PID 1a86:e008) | |
176 | - UT-D02 (RS232 cable) | |
177 | ||
178 | The above cables are all physically compatible (same IR connector shape) | |
179 | with all/most currently known UNI-T multimeters. For example, you can | |
180 | use either of the UT-D04 USB/HID cables or the UT-D02 RS232 cable with | |
181 | the UNI-T UT61D multimeter. | |
182 | ||
183 | When using the UT-D02 RS232 cable with any of the supported UNI-T DMMs, | |
184 | you have to use the respective driver with a '-ser' drivername suffix | |
185 | (internally all of these models are handled by the 'serial-dmm' driver). | |
186 | ||
187 | You also need to specify the serial port via the 'conn' option, e.g. | |
188 | /dev/ttyUSB0 (attached via a USB-to-serial cable) or /dev/ttyS0 (actual | |
189 | RS232 port) on Linux (see above). | |
190 | ||
191 | Finally, the user running the frontend (e.g. sigrok-cli) also needs | |
192 | permissions to access the respective serial port (see above). | |
193 | ||
194 | Examples (sigrok-cli): | |
195 | ||
196 | $ sigrok-cli --driver uni-t-ut61e-ser:conn=/dev/ttyUSB0 ... | |
197 | $ sigrok-cli --driver voltcraft-vc820-ser:conn=/dev/ttyS0 ... | |
198 | ||
199 | When using any of the UT-D04 USB/HID cables you have to use the respective | |
200 | driver _without_ the '-ser' drivername suffix (internally all of these models | |
201 | are handled by the 'uni-t-dmm' driver). | |
202 | ||
203 | Since the UT-D04 cables are USB based (but don't use a USB-to-serial chip) | |
204 | there is no need to specify a serial port via 'conn', of course. | |
205 | However, the user running the frontend does also need to have permissions | |
206 | to access the respective USB device (see above). | |
207 | ||
208 | Examples (sigrok-cli): | |
209 | ||
210 | $ sigrok-cli --driver uni-t-ut61e ... | |
211 | $ sigrok-cli --driver voltcraft-vc820 ... | |
212 | ||
213 | ||
214 | UNI-T UT-D04 cable issue on Linux | |
215 | --------------------------------- | |
216 | ||
217 | The UNI-T UT-D04 cable with Hoitek HE2325U (or WCH CH9325) chip seems to have | |
8d3764aa | 218 | a very specific problem on Linux. Apparently it requires to be put into |
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219 | suspend (and woken up again) before it is usable. This seems to be a |
220 | Linux-only issue, Windows is not affected by this since apparently the | |
221 | Windows kernel does this for every USB device, always. | |
222 | ||
223 | Thus, if you want to use any of the UNI-T DMMs with this specific cable, | |
224 | you'll have to run the following script (as root) once, every time you attach | |
225 | the cable via USB. The script was written by Ralf Burger. | |
226 | ||
227 | See also: http://erste.de/UT61/index.html | |
228 | ||
229 | #!/bin/bash | |
230 | for dat in /sys/bus/usb/devices/*; do | |
231 | if test -e $dat/manufacturer; then | |
232 | grep "WCH.CN" $dat/manufacturer > /dev/null && echo auto > ${dat}/power/level && echo 0 > ${dat}/power/autosuspend | |
233 | fi | |
234 | done | |
235 | ||
236 | ||
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237 | Enabling multimeter / data logger measurement output |
238 | ---------------------------------------------------- | |
239 | ||
240 | Some multimeters or data loggers will not start outputting measurement data | |
241 | unless a certain action has been performed by the user beforehand. This is | |
242 | usually mentioned in the vendor manual of the respective device, but here's | |
243 | a short list for convenience: | |
244 | ||
245 | - Digitek DT4000ZC: Briefly press the "RS232" button. | |
246 | - PCE PCE-DM32: Briefly press the "RS232" button. | |
247 | - RadioShack 22-812: Press and hold "SELECT" and "RANGE" together. | |
248 | - TekPower TP4000ZC: Briefly press the "RS232" button. | |
249 | - UNI-T UT61D: Press the "REL/RS232/USB" button for roughly 1 second. | |
250 | - V&A VA18B: Keep the "Hz/DUTY" key pressed while powering on the device. | |
251 | - Victor 70C: Press the "REL/RS232" button for roughly 1 second. | |
252 | - Victor 86C: Press the "REL/RS232" button for roughly 1 second. | |
45bb47a7 | 253 | - Voltcraft VC-830: Press the "REL/PC" button for roughly 2 seconds. |
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254 | |
255 | ||
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256 | ALSA driver |
257 | ----------- | |
258 | ||
259 | The 'alsa' driver can be used to sample analog data using a PC's soundcard. | |
260 | I.e. the sound card can act as a simple oscilloscope (with some limitations) | |
261 | using commercial or DIY "sound card scope probe" cables. | |
262 | ||
263 | Since ALSA is a Linux-specific sound system, this driver will inherently | |
264 | only compile and work on Linux. | |
265 | ||
266 | We might write additional drivers to make a similar functionality available | |
267 | on other OSes at some point. | |
268 | ||
269 | ||
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270 | Link Instruments MSO-19 |
271 | ----------------------- | |
272 | ||
273 | The driver for the Link Instruments MSO-19 mixed-signal oscilloscope (MSO) | |
274 | is currently using libudev (which is a library for the Linux-specific udev | |
275 | system). Thus, this driver can currently only compile and work on Linux. | |
276 | ||
277 | We plan to fix this though, so that it'll work on all other OSes, too. | |
278 | ||
279 | ||
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280 | ChronoVu LA8 USB VID/PIDs |
281 | ------------------------- | |
282 | ||
283 | The ChronoVu LA8 logic analyzer is available in two revisions. Previously, | |
284 | the LA8 shipped with a USB VID/PID of 0403:6001, which is the standard ID | |
285 | for FTDI FT232 USB chips. | |
286 | ||
287 | Since this made it hard to distinguish the LA8 from any other device | |
288 | with this FTDI chip connected to the PC, the vendor later shipped the | |
289 | LA8 with a USB VID/PID of 0403:8867. | |
290 | ||
291 | The 'chronovu-la8' driver in libsigrok supports both VID/PID pairs and | |
292 | automatically finds devices with either VID/PID pair. However, currently | |
293 | the driver will assume any device with VID/PID 0403:6001 is a ChronoVu LA8. | |
294 | ||
295 | ||
296 | OLS | |
297 | --- | |
298 | ||
299 | The Dangerous Prototypes Openbench Logic Sniffer (OLS) logic analyzer is | |
300 | supported by the 'ols' driver in libsigrok. This driver assumes a somewhat | |
301 | recent firmware has been flashed onto the OLS (it doesn't need a firmware | |
302 | upload every time it's attached via USB, since the firmware is stored in the | |
303 | device permanently). | |
304 | ||
305 | The most recent firmware version that is tested is 3.07. | |
306 | ||
307 | If you use any older firmware and your OLS is not found or is not working | |
308 | properly, please upgrade to at least this firmware version. Check the | |
309 | Dangerous Prototypes wiki for firmware upgrade instructions: | |
310 | ||
311 | http://dangerousprototypes.com/docs/Logic_Sniffer_upgrade_procedure | |
312 | ||
313 | Also, you need to specify a serial port for the OLS in the frontends, e.g. | |
314 | using the 'conn' option in sigrok-cli, and you also need to have the | |
315 | permissions to access the serial port (see above). | |
316 | ||
317 | Example: | |
318 | ||
319 | $ sigrok-cli --driver ols:conn=/dev/ttyACM0 ... | |
320 | ||
321 | ||
322 | Rigol DS1xx2 oscilloscopes | |
323 | -------------------------- | |
324 | ||
325 | The 'rigol-ds1xx2' driver (for the Rigol DS1052E and some other, similar DSOs) | |
326 | currently uses the Linux usbtmc kernel driver. This means it can currently | |
327 | only be built and used on Linux (i.e., it's non-portable). | |
328 | ||
329 | The use of a kernel module also means it is dependent on the kernel version | |
330 | used, as well as on whether this specific module is available in the kernel. | |
331 | Additionally, the usbtmc kernel module has been known to have various bugs | |
332 | in some versions. These are some (but not all) drawbacks of using a kernel | |
333 | module as opposed to a libusb-based driver that works in user-space. | |
334 | ||
335 | We plan to change the driver to use the 'librevisa' user-space shared | |
336 | library (which uses libusb) soon, which will fix all these issues and make | |
337 | the driver portable at the same time. | |
338 |