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Get rid of USB bmRequestType constants

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These constants were calculated on class loading, which didn't work
without pyusb. USB support is going to remain optional.
This commit is contained in:
Grigori Goronzy 2016-05-18 16:40:09 +02:00
parent fce2f01232
commit 979d7f513f
1 changed files with 4 additions and 8 deletions
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12
stcgal/protocols.py
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@ -1435,12 +1435,6 @@ class StcUsb15Protocol(Stc15Protocol):
"""PID of STC devices"""
USB_PID = 0x4312
"""Control transfer from host to device"""
USB_HOST2DEV = usb.util.CTRL_TYPE_VENDOR | usb.util.CTRL_RECIPIENT_DEVICE | usb.util.CTRL_OUT
"""Control transfer from device to host"""
USB_DEV2HOST = usb.util.CTRL_TYPE_VENDOR | usb.util.CTRL_RECIPIENT_DEVICE | usb.util.CTRL_IN
def __init__(self):
# XXX: this is really ugly!
Stc15Protocol.__init__(self, "", 0, 0, 0)
@ -1454,7 +1448,8 @@ class StcUsb15Protocol(Stc15Protocol):
def read_packet(self):
"""Read a packet from the MCU"""
packet = self.dev.ctrl_transfer(self.USB_DEV2HOST, 0, 0, 0, 132).tobytes()
dev2host = usb.util.CTRL_TYPE_VENDOR | usb.util.CTRL_RECIPIENT_DEVICE | usb.util.CTRL_IN
packet = self.dev.ctrl_transfer(dev2host, 0, 0, 0, 132).tobytes()
if len(packet) < 5 or packet[0] != 0x46 or packet[1] != 0xb9:
self.dump_packet(packet)
raise StcFramingException("incorrect frame start")
@ -1487,7 +1482,8 @@ class StcUsb15Protocol(Stc15Protocol):
i += 7
self.dump_packet(chunks, request, value, index, receive=False)
self.dev.ctrl_transfer(self.USB_HOST2DEV, request, value, index, chunks);
host2dev = usb.util.CTRL_TYPE_VENDOR | usb.util.CTRL_RECIPIENT_DEVICE | usb.util.CTRL_OUT
self.dev.ctrl_transfer(host2dev, request, value, index, chunks);
def connect(self, autoreset=False):
"""Connect to USB device and read info packet"""