Update XXX2000.py

[rluening]

Tested with an USB2000

[ap--]

Thanks for contributing. Please fix the above things, then we can merge the PR.

[ap--]

I just pushed a new usb2000 branch. Can you check it out? It should fix the:

• set_integration_time thing (a mistake on my side)
• query_status error (the spectrometer returns this one value byte swapped...)
• query_information error (maybe this spectrometer needs the 17 bytes specifically, because it should use 0x87 by default...)

If they work, we can look into the request_spectrum problem.

[ap--]

Okay, there was a mistake in defines.py. Can you test the usb2000 branch now?

[ap--]

Please add this line:

print "DEBUG:", self._integration_time, self._USBTIMEOUT, self._packet_N, self._packet_size

in front of the time.sleep in class _XXX2000 and report back.

[rluening]

DEBUG: 0.1 1.0 64 64 Thus time.sleep(max(self._integration_time - self._USBTIMEOUT, 0)) will be 0.

Is the time base still µs? (--Found: time is now in seconds )

The USB2000 has a valid range of 3 to 30000 ms for integration time: _init_robust_spectrum(self) will set it to 0.001 s

print "DEBUG:", self._EPspec => 135 => '0x87' WRONG Port

This is improtant. The spectrum is received through epi=0x82

Hard coded to use epi=0x82: XXX2000.py", line 24, in for j in range(self._packet_N) for i in range(self._packet_size)) IndexError: array index out of range

[rluening]

at line 22 print "DEBUG:", ret, len(ret) will give a flat array('B', [0,....]) of len 4096 in one dimension. I guess this is not what you expected ! ?

[ap--]

DEBUG: 0.1 1.0 64 64 Thus time.sleep(max(self._integration_time - self._USBTIMEOUT, 0)) will be 0. Is the time base still µs? (--Found: time is now in seconds )

This is ok. Exactly what we'd expect.

The USB2000 has a valid range of 3 to 30000 ms for integration time: _init_robust_spectrum(self) will set it to 0.001 s

This could be problematic. I'll change it to 5 microseconds. Fixed in cf26bb6

print "DEBUG:", self._EPspec => 135 => '0x87' WRONG Port This is improtant. The spectrum is received through epi=0x82

Yes, that was my mistake again. Fixed in 715763a

XXX2000.py", line 24, in for j in range(self._packet_N) for i in range(self._packet_size)) IndexError: array index out of range

Yes, there's a mistake. Fixed in 8d66a30

[rluening]

We are getting closer.... Now in line 21: for j in range(0, self._packet_N, 2) for i in range(self._packet_size)) TypeError: sequence item 0: expected string, int found

[ap--]

Weird... Can you:

print ret
print type(ret)

Before that line and report back?

[rluening]

Here we go: array('B', [0, 38, 43, 37, 36, 53, 51, 53, 50, 53, 52, 53, 47, 57, 58, 51, 50, 54, 45, 52, 54, 43, 47, 54, 54, 53, 53, 53, 50, 53, 53, 57, 59, 65, 49, 51, 51, 52, 63, 62, 56, 47, 56, 50, 58, 55, 57, 53, 52, 56, 57, 50, 47, 53, 52, 48, 48, 55, 52, 51, 51, 56, 56, 51, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 51, 56, 57, 53, 53, 51, 46, 55, 59, 49, 61, 64, 56, 53, 50, 49, 52, 59, 53, 54, 49, 56, 51, 52, 58, 56, 59, 52, 64, 50, 48, 44, 58, 60, 51, 54, 63, 56, 62, 59, 49, 59, 53, 55, 53, 52, 61, 59, 61, 57, 51, 59, 55, 59, 58, 57, 57, 58, 60, 55, 52, 53, 54, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 52, 55, 55, 57, 56, 56, 55, 60, 56, 57, 56, 52, 53, 62, 52, 54, 61, 58, 63, 61, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 44, 53, 54, 50, 55, 54, 54, 50, 57, 61, 60, 60, 52, 51, 55, 51, 48, 50, 42, 47, 56, 53, 47, 54, 53, 54, 56, 47, 58, 60, 53, 54, 58, 48, 60, 53, 48, 58, 62, 56, 62, 58, 48, 51, 54, 50, 54, 44, 58, 56, 57, 60, 59, 60, 58, 56, 56, 50, 52, 59, 55, 58, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 48, 61, 57, 53, 58, 52, 51, 61, 57, 53, 63, 58, 56, 53, 56, 59, 52, 54, 48, 57, 48, 56, 55, 59, 58, 57, 57, 60, 62, 52, 54, 54, 57, 54, 52, 49, 57, 55, 59, 54, 61, 58, 57, 53, 51, 55, 62, 58, 50, 49, 61, 54, 52, 53, 60, 57, 51, 64, 60, 60, 50, 46, 46, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 54, 63, 63, 57, 53, 58, 65, 57, 56, 58, 59, 49, 56, 64, 62, 53, 58, 48, 53, 52, 54, 56, 56, 50, 53, 59, 50, 50, 56, 62, 53, 53, 55, 50, 54, 58, 54, 46, 52, 45, 45, 53, 52, 59, 62, 55, 53, 57, 50, 59, 56, 49, 48, 54, 54, 57, 49, 51, 61, 55, 45, 55, 63, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]) <type 'array.array'>

[rluening]

type is: type 'array.array'

[ap--]

What version of pyusb are you using? ret should be a string.

[rluening]

pyusb-1.0.0a2 on Win7

[ap--]

try the newest code. 8b57e63f77

If it still doesn't work, please try it with pyusb-1.0.0b1 as recommended

[rluening]

Tried...and of cause: ret = sum( ret[1:], ret[0] ) TypeError: sum() can't sum strings [use ''.join(seq) instead]

switched to pyusb-1.0.0b2 because pyusb-1.0.0b1 is not available any more.

[ap--]

My mistake. The string stuff was wrong. I hope it works with ba0ce959 Switching to 1.0.0b2 might break things for you. https://pypi.python.org/pypi/pyusb has version 1.0.0b1

[rluening]

ok. Now on 1.0.0b1 New Error .... spectrum = struct.unpack('<'+'H'*self._pixels, ret) struct.error: unpack requires a string argument of length 16

my supmitted Code still runs fine for me thus pyusb didn't break anything :)

[ap--]

The manual is wrong here. Big endian Byteorder on first word in query status... Fixed in 403b4158

[rluening]

status query gives: {'usb_speed': 128, 'integration_time': 5000, 'spectral_data_density': 0, 'acquisition_status': 1, 'timer_swap': 0, 'lamp_enable': 0, 'pixels': 2048, 'trigger_mode': 0, 'packets_in_endpoint': 64}

I checked self._integration_time at line 14 => 0.005 == 5 ms != 5000ms like in status 'usb_speed': 128 is wrong should be 0

and an Error: spectrum = struct.unpack('<'+'H'*self._pixels, ret) struct.error: unpack requires a string argument of length 4096

[rluening]

[rluening]

It changes endianess in the bytestream... ugly isn't it?

[ap--]

It's quite hard to debug this without the hardware. I hope it's working now... 7678aa353

[rluening]

No error yet :)

I will check the values more carefully tommorow

[rluening]

Looks good !!

I am still not sure why "".join(sorted_ret) is working.....

I compared the result of my byteshifting implementation and yours. They differ because of noise, but are similar enought to say it is finally working.

[rluening]

A little late but the USB2000 data sheet is available at: http://oceanoptics.com/wp-content/uploads/USB2000-OEM-Data-Sheet.pdf

[ap--]

already merged in