Hello,
Hope you are well. I am having trouble communicating with my device using
read and write. My code is able to recognize the device as well as get
attributes of the device. However, when I write to device using
dev.write(endpoint = 2, message = 'OR'), there is no change in the
device. Here is the output of the device attributes. Is there anything I am
missing with the write methods? The specific commands for the device are
indicated by 2 ASCII letters (in the example above, 'OR'). Please let me
know if there is anything I can do to modify my write command. Thank you so
much.
DEVICE ID 0403:6001 on Bus 020 Address 020 =================
bLength : 0x12 (18 bytes)
bDescriptorType : 0x1 Device
bcdUSB : 0x200 USB 2.0
bDeviceClass : 0x0 Specified at interface
bDeviceSubClass : 0x0
bDeviceProtocol : 0x0
bMaxPacketSize0 : 0x8 (8 bytes)
idVendor : 0x0403
idProduct : 0x6001
bcdDevice : 0x600 Device 6.0
iManufacturer : 0x1 FTDI
iProduct : 0x2 USB-RS422 Cable
iSerialNumber : 0x3 FTWY19P5
bNumConfigurations : 0x1
CONFIGURATION 1: 500 mA ==================================
bLength : 0x9 (9 bytes)
bDescriptorType : 0x2 Configuration
wTotalLength : 0x20 (32 bytes)
bNumInterfaces : 0x1
bConfigurationValue : 0x1
iConfiguration : 0x0
bmAttributes : 0x80 Bus Powered
bMaxPower : 0xfa (500 mA)
INTERFACE 0: Vendor Specific ===========================
bLength : 0x9 (9 bytes)
bDescriptorType : 0x4 Interface
bInterfaceNumber : 0x0
bAlternateSetting : 0x0
bNumEndpoints : 0x2
bInterfaceClass : 0xff Vendor Specific
bInterfaceSubClass : 0xff
bInterfaceProtocol : 0xff
iInterface : 0x2 USB-RS422 Cable
ENDPOINT 0x81: Bulk IN ===============================
bLength : 0x7 (7 bytes)
bDescriptorType : 0x5 Endpoint
bEndpointAddress : 0x81 IN
bmAttributes : 0x2 Bulk
wMaxPacketSize : 0x40 (64 bytes)
bInterval : 0x0
ENDPOINT 0x2: Bulk OUT ===============================
bLength : 0x7 (7 bytes)
bDescriptorType : 0x5 Endpoint
bEndpointAddress : 0x2 OUT
bmAttributes : 0x2 Bulk
wMaxPacketSize : 0x40 (64 bytes)
bInterval : 0x0
Sasha Yousefi
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