Differences

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--- en:python-usbtmc:readme [2013/08/08 00:20] – alex
+++ en:python-usbtmc:readme [2013/12/17 07:22] (current) – alex
@@ Line 4: / Line 4: @@
 Python USBTMC provides a pure Python USBTMC driver for controlling instruments over USB.
+===== Requirements =====
+  * Python 2 or Python 3
+  * PyUSB
 ===== Installation =====
@@ Line 33: / Line 38: @@
 KERNEL=="usbtmc[0-9]*",   MODE="0660", GROUP="usbtmc"
 </code>
+===== Windows setup =====
+To use Python USBTMC in Windows, PyUSB and libusb are required.  They can be downloaded from:
+  * http://sourceforge.net/projects/pyusb/
+  * http://www.libusb.org/wiki/libusb-win32
+An INF file will also need to be created in order to use devices with libusb. Without a properly set up INF file, Python USBTMC will not be able to locate the device.  There are instructions on the libusb page for how to generate the INF file.
 ===== Usage examples =====
@@ Line 41: / Line 55: @@
 import usbtmc
 instr =  usbtmc.Instrument(2391, 5973)
+print(instr.ask("*IDN?"))
+# returns 'AGILENT TECHNOLOGIES,MSO7104A,MY********,06.16.0001'
+</code>
+When multiple instruments are connected they can be identified by serial number:
+<code python>
+import usbtmc
+instr =  usbtmc.Instrument(2391, 5973, 'MY********')
+print(instr.ask("*IDN?"))
+# returns 'AGILENT TECHNOLOGIES,MSO7104A,MY********,06.16.0001'
+</code>
+It is also possible to connect with VISA resource strings like so:
+<code python>
+import usbtmc
+instr =  usbtmc.Instrument("USB::0x0957::0x1755::INSTR")
+print(instr.ask("*IDN?"))
+# returns 'AGILENT TECHNOLOGIES,MSO7104A,MY********,06.16.0001'
+</code>
+and:
+<code python>
+import usbtmc
+instr =  usbtmc.Instrument("USB::0x0957::0x1755::MY********::INSTR")
 print(instr.ask("*IDN?"))
 # returns 'AGILENT TECHNOLOGIES,MSO7104A,MY********,06.16.0001'