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[SOLVED] Help in PIC18F4550 Bootloader (PC cant Detect the device)

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nsw1216

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Hello ALL,

I am trying to create a USB device which interface with the PC using PIC18F4550. After creating the PIC circuit, I test the circuit on the breadboard with the PIC is programmed with the "USB Device - HID - HID Bootloader - C18 - PIC18F4550" . I programmed the bootloader hex file into my PIC using the ALL-100 Universal Programmer.

However, my PC doesn't detect any device when i plugged in my USB device.

May I know is there any solutions or references regarding my problems can be referred in order to resolve my problems ?

Replies are greatly welcome and much appreciated.
Thank you very much.
 

hey, am facing the same problem, although i used the bootloader from Serial Bootloader AN1310 v1.04
after making few changes in configuration bits.
the circuit i built is this:



any suggestions?

---------- Post added at 19:37 ---------- Previous post was at 19:10 ----------
prash42135 said:
hey, am facing the same problem, although i used the bootloader from Serial Bootloader AN1310 v1.04
after making few changes in configuration bits.
Click to expand...

i am using a 20 MHz crystal.....
here are the changes i made:

 

Please check the other thread for the same issue, hope you 'll get an idea.
 

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