mirror of
https://github.com/brmlab/edubrm.git
synced 2025-06-08 21:03:59 +02:00
60 lines
2.2 KiB
Python
60 lines
2.2 KiB
Python
import usb
|
|
|
|
class Device:
|
|
|
|
VENDORID = 0x1fc9
|
|
PRODUCTID = 0x1337
|
|
INSIZE = 64
|
|
OUTSIZE = 64
|
|
|
|
def __init__(self):
|
|
usbdev = usb.core.find(idVendor = self.VENDORID, idProduct = self.PRODUCTID)
|
|
if usbdev == None:
|
|
raise Exception('EduBRM device not found')
|
|
try:
|
|
usbdev.detach_kernel_driver(0)
|
|
except:
|
|
pass
|
|
usbdev.set_configuration()
|
|
self.epo = usb.util.find_descriptor(usbdev.get_interface_altsetting(),
|
|
custom_match = lambda e: \
|
|
usb.util.endpoint_direction(e.bEndpointAddress) == usb.util.ENDPOINT_OUT)
|
|
self.epi = usb.util.find_descriptor(usbdev.get_interface_altsetting(),
|
|
custom_match = lambda e: \
|
|
usb.util.endpoint_direction(e.bEndpointAddress) == usb.util.ENDPOINT_IN)
|
|
|
|
# sets pwm (which=1,2), (duty=16bit)
|
|
def pwm(self, which, duty):
|
|
duty = 65535 - duty
|
|
self.epo.write('p' + chr(which) + chr(duty & 0xff) + chr(duty >> 8))
|
|
|
|
# sets ddswave (wave=square,sine,saw1,saw2)
|
|
def ddswave(self, wavetype):
|
|
self.epo.write('d' + chr(wavetype))
|
|
|
|
# sets ddsfreq (freq=32bit)
|
|
def ddsfreq(self, freq):
|
|
self.epo.write('D' + chr(freq & 0xff) + chr((freq >> 8) & 0xff) + chr((freq >> 16) & 0xff) + chr(freq >> 24))
|
|
|
|
# set opamp (which=1,2), (chan=1..6), (gain=1, 2, 4, 5, 8, 10, 16, 32)
|
|
def opamp(self, which, chan, gain):
|
|
self.epo.write('m' + chr(which) + chr(chan) + chr(gain))
|
|
|
|
# set all switches (states=6bit)
|
|
def switches(self, states):
|
|
self.epo.write('s' + chr(states))
|
|
|
|
# set pins state (states=3bit) (1 = input, 0 = output)
|
|
def setpins(self, states):
|
|
self.epo.write('P' + chr(states))
|
|
|
|
# set output (which=1,2,3), (state=0,1)
|
|
def setout(self, which, state):
|
|
self.epo.write('o' + chr(which<<1 + state))
|
|
|
|
def read(self):
|
|
# 6x AD (16 bits) + 3 x I
|
|
i = self.epi.read(self.INSIZE)
|
|
return (i[0] + i[1]<<8, i[2] + i[3]<<8, i[4] + i[5]<<8,
|
|
i[6] + i[7]<<8, i[9] + i[9]<<8, i[10] + i[11]<<8,
|
|
i[12] & 0x01, (i[12] & 0x02) >> 1, (i[12] & 0x04) >> 2)
|