usb connect - need help

[terval]

any one can help me on :

i need usb connectivity to pc (pic18f2550 or pic18f4550) to everything ,port(x), i2c, serial ,adc ?

any idea or soft.

Best regards to all.

[8K51]

Hi

If you don't want to developp your own firmware UBW board is an answer :

http://greta.dhs.org/UBW/

Regards

[FlvAnm]

Perhaps this link (http://www.alanmacek.com/usb/) - USB and PIC Microprocessors 16C745 and 18F2455 could be usefull.
it's quite old, but interesting.

Best Regards,
FLV

[microled]

If you check the picbasic forum you will find all the answers you need, plus quite a few more!!

[frasenci]

@terval

All suggestions given already are ok but maybe you get confused analyzing already made examples that are more complicated than needed.
I would say , try to keep it always as simple as the proyect at hands permits.

1.- First establish a clean link between PIC and Pc , that you can accomplish easy with CDC ( USb Serial )  or HID ( Both supported by MS Visual  on Pc and BASIC for PIC )

2.- Develop an communication code to talk between both platforms wich includes the commands and type of info you want to share.

3.- Write the code to handle the messages on both sides based on 2.-

For example , one message coming from Pc to PIC could be the string "AAAC01XXX" where AAA = Flag to announce message start , C01 = Command for PIC to sample analog port 1 , XXX = Flag to indicate termination off message. To this , PIC could answer with another message "AAAV010985XXX" . In this mesage , AAA and XXX can have the same meaning as before and V010985 will indicate V01 = value of variable 01 , 0985 = value 985

On Pc side it will be easy to manage the polling of serial port with function OnCom() ( prescence of data on com port ).
On PIC side it can be more tricky but you will soon find a way to poll the port with needed timing and let the code handle the messages from there on.

Hope this simple description helps you as a very basic startpoint
For CDC and HID see examples in Proteus,Proton and PBPro

Greetings
 

[terval]

Hi frasenci

Now i understand much more about, using your information,and it seem´s not so dificult,this protocol looks an easy way to work.

regards

[aj49m]

Certainly class CDC is easier for working with transfer data usb, Programming PC Simplifies

[drovik]

www.microchip.com or Proteus 7.2 (samples CDC, HID, GeneralUSB with temperature sensor for 18F4550)

[bogdantk]

Hello
The easy way is to coonect via the serial port and an FT245R adapter to USB
Check http://www.ftdichip.com/Products/FT245R.htm
you will find the driver also it will map the usb to a com port very easy to use

[micro_2000]

Hi.. The FT232R also easy to used as USB to serial converter too.
Need not additional external component.