My experiments with PIC18F4550 <> USB

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FvM

Joined: 22 Jan 2008
Posts: 5162
Helped: 767
Location: Bochum, Germany

11 Oct 2008 15:09 pic usb port

Also without an inf file, the "Found new hardware" dialog should pop-up (if the device isn't already known to you system). If nothing happens, you didn't connect the hardware correct or the PIC USB controller hasn't been activated ijn the software.

atferrari

Joined: 29 Jun 2004
Posts: 207
Helped: 3
Location: Buenos Aires - Argentina

12 Oct 2008 0:07 pic18f4550 eagle scheme

Start a new thread. Think of the people coming after you.

dzigibau

Joined: 23 Dec 2008
Posts: 1

23 Dec 2008 4:48 pic18f4550 usb projects

what hapens if i seapped signal pins d- and d+ on my usb cable
did i do something katastrofal for my pic or am i doing something wrong
i just cant seam to make my pic work
i have 3 of them and ider seam to not work
gave it a litle more placeing program buton on pin 38 and reset on pin 1
i just dont have idea what to do anymore ...........
help please!!!!!!!

rosmawati

Joined: 05 Jan 2009
Posts: 3

05 Jan 2009 3:28 pic usb project

hem very great job..thank you very much...you helped me a lot in troubleshooting my project which deals with PIC18F4550.
I successfully done as what you have said where I managed to install the driver.
For now, how can we know that it is well-functioning? I mean here, how can we know it sends and transmits data through that USB new configured port?

Thank you:|

programmer1981

Joined: 27 Jan 2009
Posts: 1

27 Jan 2009 10:47 usb pic18f4550

I did the schematic as you posted here but PICPgm doesn't detect it. Could you advice what to do? I just plugged it to the usb port, started PICPgm but it is not detected. I saw in your example that it's detected there, but my interface is not. Thanx

daviddlc

Joined: 11 Feb 2007
Posts: 196
Helped: 13

27 Jan 2009 18:48 pic18f2550 usb project

You need to upload the Microchip USB framework hex file, go to Microchip website and get the framework and install it on your pc, then look for any example file (hex)

Depending if you want your device to act like a HID or CDC, etc.

Added after 19 minutes:

Forgot to mention, if you use CDC you will need to install the custom driver, if you select to use HID there is no need to install any driver since it will use Windows driver.

I will suggest you to use HID since it works fine with XP and Vista

madusnk

Joined: 30 Jun 2008
Posts: 19

28 Jan 2009 4:59 firmware pic18f2550 usb

hi tanks for good working. did u use only the example project provided by microchip?
If so can u edit that code acording to the requrement?..can u help me doin this?
what about the PC side? is the microchip firmware support testing the program in pc?
pls help thanks in advance...

manish12

Joined: 21 Nov 2006
Posts: 1020
Helped: 31

28 Jan 2009 17:51 project pic18f4550 with usb

i also build my pic usb project , using flow code.

it is very simple to do so , even pc software is also avaliable for vb .

srinivasnaveen

Joined: 19 May 2009
Posts: 1

08 Jun 2009 9:44 pic18f2455 usb not recognized

great work .sir i'am working on data acquisition using pic18f.I want to store the value s in a text format on pc side which i'am unable to do it .
CAN U PLEASE HELP ME IN THIS REGARD.

Ankita Agarwal

Joined: 10 Jun 2009
Posts: 7

11 Jun 2009 11:03 18f4550 usb projects

i need a simple code to drive a host,USb and PIC18F2550.
how can i acknowledge that my data is transferred to host or not.

Ankita Agarwal

Joined: 10 Jun 2009
Posts: 7

17 Jun 2009 11:25 microchip mchpfsusb

After my hardware is recognised by PC now i want to send the data to PC so how do I came to know that data is sent and how can I display it on PC so that i know that this data is sent...i hav done correct interfacing of USb with PIC18F2550. Please guide me through.Let say i want tos end "abc" through PIC to PC then how do i show that PC get "abc"...is there any need of textbox which will show?

storm1111

Joined: 20 Jul 2009
Posts: 2
Location: malaysia

25 Jul 2009 11:15 usb con pic 18f4550

where can i get the source code???

if i want connect the PIC18F4550 with PIC18F4331, which pins i need to connect to????

mengrongda

Joined: 31 Jul 2009
Posts: 1
Location: china

31 Jul 2009 12:22 picdemfsusb.hex fuse settings

:Dvery good

kaushikraja1986

Joined: 18 Aug 2009
Posts: 3
Location: kolkata

19 Aug 2009 16:37 how to use pic18f4550+usb

Sir,i have used the above said ckt. and code as supplied by the link in my project but the device was not recognized by the PC.My ckt. and hex file are same as given in the topic...Can some body please tell me whats the problem in my part

Janelda

Joined: 06 Jul 2009
Posts: 23
Location: Pretoria

06 Oct 2009 13:38 Re: My experiments with PIC18F4550 <> USB

good day,

I would like to know what it means if i am not getting 3.3V at the output of the Vusb? The regulator is on by default so there should be a reading of 3.3V, yet i am getting 0.45V about. Why would this be, and also, i setup the usb and then enabled it, but the computer does not pick it up at all. What does one need to program to get the computer to pick it up and recognise it, do i need drivers for this part, and if so, where can i get it. my computer did not want to load the ones spoken about on this page, what else can i do?

blueroomelectronics

Joined: 17 Sep 2006
Posts: 1681
Helped: 99
Location: Toronto, Canada

06 Oct 2009 20:03 My experiments with PIC18F4550 <> USB

Program the PICkit2 firmware into the 18F4550 and see if your PIC is working. You'll need a 20MHz crystal for that firmware to function.

yawijaya

Joined: 18 Aug 2009
Posts: 29
Location: New Freedom, PA-USA

09 Oct 2009 16:38 Re: My experiments with PIC18F4550 <> USB----HELP

Hi, i might be off the track in this reply, but i'm really confused right now. I have 2 PICDEM FS USB demo boards, and I download the recommended framework from microchip (v2.5) that contains various sample code. I tried one, and then compiled it using MPLAB IDE, no error, but when i uploaded it, and restart the board, my laptop won't recognize it(It says something like "USB device not recognized" on the pop up notice when i plug it in). I tried with many other sample projects, even Jan Axelson generic HID firmware that is claimed to have been tested on the board, but none worked. Is there anything i'm missing here?I'm a newbie in programming and especially USB, so this has been very overwhelming for me. Any advice is appreciated. Thanks!

maroot

Joined: 02 Nov 2009
Posts: 3
Location: thailand

02 Nov 2009 3:47 Re: My experiments with PIC18F4550 <> USB

After the assembling the scheme, I connected it to the USB of the PC without programming the PIC microprocessor.
The result was null- Windows does not indicated that something was connected to the USB port.

What's wrong with me.
.....
No PIC Programmer found! Check connection!
No PIC detected!

Help me,please

Jack// ani

Joined: 02 Dec 2004
Posts: 488
Helped: 25

03 Nov 2009 0:15 Re: pic18f4550 scheme

pic master wrote:

how are u???
can u send me the schematic of jdm programmer used to program the chip 18f4550???????
it is the same programmer of 16f877????????
thanks in advance

There are plenty of JDM programmer floating around, and yeah they are basically the same as 16f877.

maroot

Joined: 02 Nov 2009
Posts: 3
Location: thailand

04 Nov 2009 2:41 Re: My experiments with PIC18F4550 <> USB

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Jack// ani

Joined: 02 Dec 2004
Posts: 488
Helped: 25

04 Nov 2009 8:37 Re: My experiments with PIC18F4550 <> USB

maroot wrote:

Have you gone through the whole thread? It appears not!!

Anyways, if you closely the OP it will not be hard to figure out that you need to program the PIC in order to get in detected by Windows.

Hope this helps

maroot

Joined: 02 Nov 2009
Posts: 3
Location: thailand

09 Nov 2009 5:12 Re: My experiments with PIC18F4550 <> USB

when connect PIC18F4550 to the circuit in PCB first time Hardware detect then i found out its driver to config ... Later it cannot to found HW in my PC and in programmer stutus show that ERROR open usb driver

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