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USB Example Code Compile Error

 
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mbro131



Joined: 22 May 2006
Posts: 9

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interrupt warnings
PostPosted: Mon May 22, 2006 8:45 pm     Reply with quote

Ahh thats better. Should I be concerned about the 'Interrupts disabled during call to prevent re-entrancy' warnings?

Does this basically mean that the compiler disables interupts until these routines are finished? and if so should I be doing this explicitly?

Matt
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon May 22, 2006 10:05 pm     Reply with quote

The usb_token_reset() function is called by:
usb_isr_rst()
usb_detach()
usb_attach()

The usb_task() function calls usb_attach(). This call is made outside
of an interrupt service routine.

The usb_isr() function calls usb_isr_rst(). This call is made from
within the #int_usb interrupt service routine.

There is only one instance of the usb_token_reset() function and it
is not re-entrant. Therefore, the compiler automatically inserts code
at compile-time to disable interrupts while usb_token_reset() is
executing.
mbro131



Joined: 22 May 2006
Posts: 9

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PostPosted: Mon May 22, 2006 10:08 pm     Reply with quote

Thankyou for clearing that up for me, much appreciated

Matt
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