关于 usb作为虚拟com口和 PC通信

reynold522

关于 usb作为虚拟com口和 PC通信 [复制链接]

hello,

i have similar problem, i get some data  from sensor and stored  in DSP C5505, and i want output these data throught usb to PC, and usb  as a virtual com port, i modify only the device descriptor and configuration descriptor, Pc can recognise the usb in a right way, but can not treat as a com port. the code below is the changed descriptor from TI CSL .

i want to ask that do i need a data interface inside this configuration descriptor, and i tried a lot of place inside and also change the cooperate endpoint  and correspond transaction code in CSL, but the PC can not recognise it anymore. so i wana know that which things i need to set and program for the purpose of communicating with PC through usb as a virtual com port .

Thanks

Uint16    deviceDesc[9] = {0x0112, 0x0200, 0x0002, 0x4000, 0x0451,
                            0x9010, 0x0000, 0x0201, 0x0103};  

  cfgDesc[60] = {0x09,0x02,0x3C,0x00,0x01,0x01,0x00,0xA0,0x00,      
configuration descriptor                                 
0x09,0x04,0x00,0x00,0x06,0x02,0x02,0x00,0x00,           interface descriptor
0x07,0x05,0x81,0x02,0x40,0x00,0x00,                              endpoint descritpor number 1  in     
0x07,0x05,0x01,0x02,0x40,0x00,0x00,                              endpoint descritpor number 1  out   
0x07,0x05,0x82,0x02,0x40,0x00,0x00,                             endpoint descritpor number 2  in   
0x07,0x05,0x02,0x02,0x40,0x00,0x00                              endpoint descritpor number 2  out

0x07,0x05,0x83,0x02,0x40,0x00,0x00,                               endpoint descritpor number 3  in   
0x07,0x05,0x03,0x02,0x40,0x00,0x00,};    endpoint descritpor number 3  out