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USB descriptor for serial comm port

Thomas Trummer

Hello,

I'm using a c8051F321 and I want to have a simple communication interface to this µC over USB.
Therefore I thought that a virtual serial comm port will be the right solution.
I know that I have to define the rigth usb descriptors, but I didn't find anything which matchs my intention.

Can anybody tell me how I can create a simple program for serial communication between the c8051f321 and my PC over usb.

thankyou.

  • 0

    I posted a CDC example to SiLabs Forum.

    USB CDC (Communication Device Class) implementation for 'F32x and 'F34x
    www.cygnal.org/.../000945.html

    Tsuneo

  • 0 in reply to Chinzei Tsuneo

    Thanks for that, I will test it as soon as possible.

    Thomas

  • 0 in reply to Chinzei Tsuneo

    Hi Tsuneo Chinzei.

    The code you have posted works very well, but I have a problem with the "CDC_ACM.inf".
    My laptop has windows 7 x64, but this driver is for x86. Is there a x64 driver. Otherwise I have to work with a virtual pc what is a little bit laborious.

    Thomas

  • 0 in reply to Thomas Trummer

    Here is an INF file of CDC, tested both on Win7 x64 and x86
    http://www.keil.com/forum/17039/
    20-Jun-2010 21:26 GMT Posted by Tsuneo Chinzei

    Copy mcb2300-vcom.inf (Revised), and modify "Device List" and "String" section, as follows.

    ;------------------------------------------------------------------------------
;  Device list
;------------------------------------------------------------------------------

[DeviceList]
%DESCRIPTION%=MCB2300USB, USB¥VID_c251&PID_1705
%COMPOSITE%  =MCB2300USB, USB¥VID_FF28&PID_0001&MI_01
%MYDEV000%   =MCB2300USB, USB\VID_16C0&PID_06EA   ;;;; <---- add this line

[DeviceList.ntamd64]
%DESCRIPTION%=MCB2300USB, USB¥VID_c251&PID_1705
%COMPOSITE%  =MCB2300USB, USB¥VID_FF28&PID_0001&MI_01
%MYDEV000%   =MCB2300USB, USB\VID_16C0&PID_06EA   ;;;; <---- add this line

...
...
;------------------------------------------------------------------------------
;  String Definitions
;------------------------------------------------------------------------------

[Strings]
Keil       = "Keil - An ARM Company"
DRIVER.SVC = "MCB2300 USB VCom Driver"
DESCRIPTION= "MCB2300 USB VCom Port"
COMPOSITE  = "MCB2300 MSC-CDC COM Port"
MYDEV000 = "CDC ACM example device"       ;;;; <---- add this line

    Tsuneo