I was expecting a command to read until a linefeed or some other terminator character within the timeout time. What information am I missing in the PyUSB tutorial.Īm I using the wrong PyUSB commands/parameters or is it about missing additional drivers or is it about the hardware, either Win10 or the device hardware? Thank you for hints on how to find out what's going wrong.īy the way, what is the second value in dev.read(0x81,7)? Number of bytes to read? Well, usually I don't know how many bytes the device will send. Apparently, it is not and I get a timeout error (see below). But only if the device is already in SCPI-mode. However, when sending :SDSLSCPI# the monitor of the oscilloscope reproduceably will freeze and it will restart. Apparently, the USB-driver (libusb-win32 v1.2.6.0) is installed correctly since the device is found and I get some response from print(dev) (see below).įrom this I can see that the output endpoint address is 0x3 and the input endpoint address is 0x81Īccording to the Oscilloscope manual, I'm supposed to send :SDSLSCPI# to the device to set it into SCPI-mode and should get the reponse ':SCPION'.
So, I'm trying to read from a USB-device (oscilloscope) using PyUSB under Win10.
This is an updated and shortened question.Ĭommunicating with a USB-device should be easy via PyUSB.
0 kommentar(er)
