Sonsivri

Hi,

I am looking for some tutorials/help on writing USB device driver for PIC18F4550 based board.

The tools I prefer is VB6, C#, VB.net

If someone knows the links would be helpfull for me

regards

xane

Look on http://www.microchip.com

http://www.create.ucsb.edu/~dano/CUI/
http://www.microchipc.com/sourcecode/

IMHO, writing your driver (in VB!) if you haven't any experience with writing drivers is senseless and too heavy. On http://www.microchip.com you will find nothing, look on microsoft -> MSDN -> DDK. But better way, use someone of microchip otr CCS drivers or libusb (open source USB driver)

Hi there, here you have articles that I´ve published on my webpage:

- PicWinUSB: PIC18F2550 USB Example with CCS, VC#, WinUSB, Win Vista & XP (x64 and x86 versions)
http://www.hobbypic.com/index.php?option=com_content&task=view&id=31&Itemid=1&lang=en

- PicUSB: PIC18F2550 USB Example with CCS, VC#, MCHPUSBAPI, Win XP & 98
http://www.hobbypic.com/index.php?option=com_content&task=view&id=14&Itemid=27&lang=en

- PicUSBNut: PIC18F2550 USB Example with CCS, VC#, MCHPUSBAPI, Win XP & 98
http://www.hobbypic.com/index.php?option=com_content&task=view&id=23&Itemid=27&lang=en

- PicUSB Stuff: PIC18F2550 USB Example with CCS, VC++, VB, Delphi, Labview and Linux, MCHPUSBAPI
http://www.hobbypic.com/index.php?option=com_content&task=view&id=24&Itemid=1&lang=en


Best regards

Hi I am not quite looking to write a driver (in vb or ..) from scratch, rather I am looking for generic (USB-Serial kind of) code/driver in which i can change PID/VID to identify my own device then use simple data transfer like serial port.

It's different :) In this case I really  recommend you libusb. http://libusb.sourceforge.net/. It's simple, cross-platform and stable universal driver

See this one

http://electronicfr.com/index.php/Microcontrollers-and-USB/Part-1-How-to-build-a-USB-device-with-a-PIC-18F4550-or-18F2550.html

Hi, after some "tries and errors" i used the following components to have a working USB-communication between a PIC18F4550 and my PC:
- MikroC for the PIC
- HIDLIBRARY.DLL from Mike Obrian
- Visual Studio 2005

i had to fight a little bit with the documentation... but in the end the following code did the trick:
- Exchange data with my USB device:

Private Sub ReadInternalADC()

        Dim InputData As HIDLibrary.HidDeviceData
        Dim i As Integer
        Dim OutputText As String
        Dim uInput As Integer


        '--> Enumerate the devices with the Vendor Id
        '--> and Product Id of the DDS Stuff
        HidDeviceList = HIDLibrary.HidDevices.Enumerate(&H1235, &H1)

        If HidDeviceList.Length > 0 Then

            HidDevice = HidDeviceList(0)

            '--> Check if connected...

            HidDevice.OpenDevice()

            Dim OutData As Byte()

            ReDim OutData(HidDevice.Capabilities.OutputReportByteLength - 1)


            '--> Send a report to Device (8888888 is command to PIC to answer with data..)

            OutData(1) = Asc("8")
            OutData(2) = Asc("8")
            OutData(3) = Asc("8")
            OutData(4) = Asc("8")
            OutData(5) = Asc("8")
            OutData(6) = Asc("8")
            OutData(7) = Asc("8")
            OutData(8) = Asc("8")

            HidDevice.Write(OutData)
            InputData = HidDevice.Read
            OutputText = ""

            For i = 1 To 5
                OutputText = OutputText + Chr(InputData.Data(i))
            Next

            uInput = Int((Val(OutputText) * 4.7 / 1.024) + 0.5)    ' convert Text answer (ADC) to Voltage

        End If

    End Sub

have fun!

can you share the complete code (schematic, mikroC source, hex and VC code )?

Thks

Ihave developped with toools easyhid ,delphi
if u want mail me i will give all 

best source known to me , downloads master's conference 2007 CD from this site and read tutorial in it

Yes, please share it over here, so anybody would be benefit !!! ... thanks for your kindness
my email ... [email protected].

Thanks mate.

Please also mail me your files. My email address: [email protected]

Thanks in advance!

Please also mail me your files. My email address:[email protected]
Thanks in advance!

Thanks in advance!

I could send you the Source code of the PDFSUSB.exe. It a good bootloader and aplication Software from Microchip.
It's written in C++ 6.0 from Borland!

Greetings

microchip forum the usb section contains a lot of usefull material

Posted on: February 15, 2008, 08:40:08 08:40 - Automerged

---

here is the link

http://forum.microchip.com/tt.aspx?forumid=102

xiaofan and DarioG are good contributors

I tried so much, but I could not manage to get my 18F2550 work properly.  :-\

... and what exactly tried??