help connecting pic 18f4550 to PC

claudia.crespo · Joined: 19 Apr 2013 Posts: 3

Hi
I'm trying to connect a PIC18f4550 to my pc
at this point i've tried any sample code i've found on the internet and is not working Sad

so here i've attached my schematic design( on ares) and some programs i've tried to test and also some i've created
without any result
https://skydrive.live.com/redir?resid=8EFDA2B577C0E860%212318

i'm about to jump out of a window at this point i don't know what is wrong
thanks

Claudia

temtronic · Posted: Mon Dec 02, 2013 8:34 pm

Ok..I can't download your schematic but here's some hints.
If you're using RS232 to the PC ,you'll need a max232 or similar device between the PIC and PC but since it's the 4550 I'm thinking you're trying to use the USB peripheral.
If so,start by using the CCS supplied USB CDC example program located in the examples folder.I know it works with a PC with XP. You do have to get the hardware right...it's common to swap D+ and D- ,could be a wiring error.

You don't say what your problem is

1) have you got the PIC able to run the '1Hz flashing LED' program ? That will confirm some hardware, fuses,clock speed etc.
2) then try the 'hello world' program if using the UART.
3) use the CCS examples and report back what's happening.

hth
jay