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robert
Joined: 10 Aug 2006
Posts: 9
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| 18F4550 USB development kit crashes PC |
 Posted: Fri Sep 01, 2006 5:58 am |
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Hi,
Can any one help, I am tryng USB for the first time and have the USB development kit for the PIC18F4550. I have programmed a simple example from the manual (ex7.c) that just checks for enumeration.
| Code: |
#include <18F4550.h>
#FUSES HSPLL //High Speed Crystal/Resonator with PLL enabled
#FUSES NOWDT //Watch Dog Timer
#FUSES NOPROTECT //Code not protected from reading
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NODEBUG //No Debug mode for ICD
#fuses USBDIV //clock frequency configuration for USB
#fuses PLL5
#fuses CPUDIV1
#fuses VREGEN //USB voltage regulator enabled
# use delay(clock=48000000)
#ignore_warnings NONE // report all warnings
#define LED1 PIN_A5
#define LED2 PIN_B4
#define LED3 PIN_B5
#define BUTTON PIN_A4
#define LED_ON output_low
#define LED_OFF output_high
#define USB_EPI_TX_ENABLE USB_ENABLE_INTERRUPT
#define USB_EP1_TX_SIZE 8
#define USB_EPI_RX_ENABLE USB_ENABLE_INTERRUPT
#define USB_EP1_RX_SIZE 8
# include <pic18_usb.h> // Microchip 18Fxx5x hardware layer for usb.c
# include <usb_desc_hid.h> // USB Configuration and Device descriptors for this UBS device
# include <usb.c> // handles usb setup tokens and get descriptor reports
void main()
{
LED_ON(LED1);
LED_OFF(LED2);
LED_OFF(LED3);
usb_init();
while(TRUE)
{
if (usb_enumerated())
LED_ON(LED3);
else
LED_OFF(LED3);
}
}
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When I plug the USB device into the PC I get someting like:
New Hardware detected
Human Interface Device
Then the PC creashes with a restart. On restart the PC reports a catastrophic failure had occured and when I report to MS it comes back with the reason being "unknown driver". Same on two other PC's
OS: WINXP PRO
The LED3 lights so the crash comes after enumeration.
Thanks for any help |
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Darren Rook
Joined: 06 Sep 2003
Posts: 287
Location: Milwaukee, WI
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| Posted: Sat Sep 02, 2006 8:43 am |
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Does example 8 crash the PC?
_________________
I came, I saw, I compiled. |
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robert
Joined: 10 Aug 2006
Posts: 9
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| Posted: Mon Sep 04, 2006 3:02 am |
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Thanks Darren,
I have just picked this up from someone thats left (the only expert we had in the company). I have found a test program he had made and it does not crash the pc. It looks that it is based on example 8 so it would seem that ex7 is a duff'n. Thats a pity as it doesnt give confidence to someone who does'nt really know what they are doing. |
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