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USB on 18F46J50

 
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guenter



Joined: 01 Jun 2011
Posts: 6

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USB on 18F46J50
PostPosted: Sun Nov 06, 2011 2:38 pm     Reply with quote
Hello Forum,

i want to setup an 18F46J50 for USB. The external crystal is 8 MHz. The PC shows only an unknown Device.

Code:
#include <18F46J50.h>
#fuses NOWDT
#FUSES HSPLL
#fuses PLL2
#fuses CPUDIV6   
#use delay(clock=8MHz)

#define PIN_USB_SENSE PIN_C6
#define HW_INIT() setup_oscillator(OSC_PLL_ON); delay_ms(50)
Ttelmah



Joined: 11 Mar 2010
Posts: 19327

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PostPosted: Sun Nov 06, 2011 3:47 pm     Reply with quote
What supply are you running the chip off?. How are you powering Vusb?. Note1, Figure 29.1 in the data sheet.

Best Wishes
guenter



Joined: 01 Jun 2011
Posts: 6

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PostPosted: Sun Nov 06, 2011 3:52 pm     Reply with quote
Hello I got it!
Code:

#include <18F46J50.h>
#fuses NOWDT
#FUSES HSPLL
#fuses PLL2
#fuses NOCPUDIV 
#use delay(clock=48MHz)

#define PIN_USB_SENSE PIN_C6
#define HW_INIT() setup_oscillator(OSC_PLL_ON); delay_ms(50)
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