Hello all.
So I have some working c code for a temperature Temper1v1.1 usb temperature
sensor I recently bought: http://pastie.org/3354037
But I want to port this to using pure python via pyusb.
Based on the working c code I came up with the following:
------------
import usb.core
dev = usb.core.find(idVendor=0x0c45,idProduct=0x7401)
if dev.is_kernel_driver_active(0):
dev.detach_kernel_driver(0)
dev.detach_kernel_driver(1)
dev.set_configuration()
request = ''.join([chr(x) for x in
[0x01,0x80,0x33,0x01,0x00,0x00,0x00,0x00]])
dev.ctrl_transfer(0x21,9,0x200,0x1,request,8)
ret = dev.read(0x82,8,0)
print(ret)
------------
However, this fails with the following Traceback
------------
Traceback (most recent call last):
File
"/home/lrvick/.virtualenvs/temper1/lib/python3.2/site-packages/usb/core.py",
line 177, in get_endpoint_type
return self._ep_type_map[key]
KeyError: (130, 0, 0)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "temper1.py", line 15, in <module>
ret = dev.read(0x82,8,0)
File
"/home/lrvick/.virtualenvs/temper1/lib/python3.2/site-packages/usb/core.py",
line 629, in read
fn = fn_map[self._ctx.get_endpoint_type(self, endpoint, intf)]
File
"/home/lrvick/.virtualenvs/temper1/lib/python3.2/site-packages/usb/core.py",
line 180, in get_endpoint_type
etype = util.endpoint_type(e.bmAttributes)
AttributeError: 'NoneType' object has no attribute 'bmAttributes'
------------
Clearly I am doing something wrong but I have no idea what to try next.
Any ideas?
--
Lance R. Vick
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