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USB driver does not load

 
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pasini



Joined: 12 Dec 2005
Posts: 50
Location: Curitiba - Brazil

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USB driver does not load
PostPosted: Wed May 31, 2006 5:36 pm     Reply with quote
Hi,
MPLAB 7.10 and CCS 3.325
I have a LOW-VOLTAGE PIC18LF4550 working at 3.3V and 16MHz.
I have a resistor connected to the USB 5V and pin RC6 to be the bus sense, and a 470nF capacitor at VUSB.

The problem is that when I connect the board to the computer USB nothing happens, WindowsXP does not recognize it. I do not hear the Windows beeping when USB device is connected.

I am trying to do a serial COM port to talk to the Hyperterminal, CDC (Communication Device Class) model, with the usbser.sys driver.
I find here at the forum a *.inf file with some descriptions that seams to be correct.

Is there something missing with my hardware ? And with the firmware ?

My code is:

Code:

#include <18F4550.h>
#device *=16
#device ADC=10
//configure a 16MHz crystal to operate at 48MHz
#fuses HS,NOWDT,NOPROTECT,NOLVP,NODEBUG, PLL4
#use delay(clock=16000000)

#include <defines.h>
#include <buzzer.h>
#include <lcd.h>
#include <pc.h>
   
#define __USB_PIC_PERIF__ 1
#define USB_CON_SENSE_PIN PIN_C6

#include <usb_cdc.h>

void main(void)
{   
      setup_psp(PSP_DISABLED);

   usb_init();
   while(!usb_cdc_connected());

   while(1)
    {   
   
      printf(usb_cdc_putc,"Test USB");
      delay_ms(500);

   }
}



Thanks in advance for any help,
Pasini
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed May 31, 2006 5:56 pm     Reply with quote
Quote:
#include <18F4550.h>
#device *=16
#device ADC=10
//configure a 16MHz crystal to operate at 48MHz
#fuses HS,NOWDT,NOPROTECT,NOLVP,NODEBUG, PLL4
#use delay(clock=16000000)

The CCS examples show the fuse as HSPLL, not HS.
Guest
PostPosted: Mon Sep 25, 2006 2:23 pm     Reply with quote
hi.pasini

COULD YOU TELL ME YOUR PROBLEM HAS BEEN SOLVED?
I MEET THE SAME PROBLEM TOO, IS IT POSSIBLE TO SHARE YOUR ANSWER?

Tks.
pasini



Joined: 12 Dec 2005
Posts: 50
Location: Curitiba - Brazil

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PostPosted: Mon Sep 25, 2006 7:12 pm     Reply with quote
Since the suggestion is only related to firmware, you should try to verify if it works by yourself Very Happy
But I reply that the change to HSPLL instead of HS, solved my problem.
Good luck
Pasini
Felipe
Guest
PostPosted: Tue Dec 26, 2006 3:06 pm     Reply with quote
Hi Pasini,

I realized you are from curitiba, so...

Voce poderia me enviar ou me explicar o seu hardware para esse projeto? Porque eu já fiz as correções no firmware e continuo com o mesmo problema: o windows XP não faz nada quando eu plugo o circuito.

felipekitamura@yahoo.com.br
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