gnupic: [gnupic] PICDEM FS USB CDC demo under Linux
Subject:
[gnupic] PICDEM FS USB CDC demo under Linux
From:
Chen Xiao Fan ####@####.####
Date:
14 Aug 2005 15:15:35 +0100
Message-Id: <3B8AEFFADD3DD4118F8100508BACEC2C07F77454@spex>
I am trying to get the CDC demo working under Linux.
It is recognized as ttyACM0 (CDC_ACM device). However communication
program seems not really successful using minicom/cutecom/gtkterm.
It seems that I can only writing to the virtual com port but not
read from the com port. Hot plugging also cause timeout problem.
I am working with the default Microchip CDC firmware and under
Windows, hypertiminal or other application works without a problem.
Python with pyserial also works under Windows.
Has anybody made it work already? Any suggestion to make it work?
I've tried a simple libusb program but set_configuration failed.
Regards,
Xiaofan
---------------------------------------
This is part of the output from dmesg:
usb 2-4: USB disconnect, address 5
ohci_hcd 0000:00:02.1: wakeup
usb 2-4: new full speed USB device using ohci_hcd and address 6
drivers/usb/class/cdc-acm.c: This device cannot do calls on its own. It is
no modem.
cdc_acm 2-4:1.0: ttyACM0: USB ACM device
-----------------------------------------------------
This is the detail decription from lsusb -v.
Bus 002 Device 013: ID 04d8:000a Microchip Technology, Inc.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 2 Communications
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x04d8 Microchip Technology, Inc.
idProduct 0x000a
bcdDevice 0.00
iManufacturer 1
iProduct 2
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 67
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 2 Abstract (modem)
bInterfaceProtocol 1 AT-commands (v.25ter)
iInterface 0
CDC Header:
bcdCDC 1.10
CDC ACM:
bmCapabilities 0x02
line coding and serial state
CDC Union:
bMasterInterface 0
bSlaveInterface 1
CDC Call Management:
bmCapabilities 0x00
bDataInterface 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 2
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10 Data
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
