Objective Development Forums

Posted: **Fri Feb 22, 2013 2:16 am**

Hello,

as I am having some trouble by (probably) not calling usbPoll often enough (50ms max) I arrived at the following question:
Why is it not possible to call "usbPoll" from within a timer interrupt?

As christian said elsewhere:
"You can't call usbPoll() from a timer interrupt. You must call it from the main code."

Is this because they share some data they both use or are there other reasons?

Thanks!

Posted: **Tue Jun 25, 2013 3:38 pm**

I think v-usb just uses the interrupts for timing and the poll depends strictly on the function usbInterruptIsReady.

Code: Select all

while (   !usbInterruptIsReady() ) //when not ready you must poll
{
   usbPoll();
}
//pulling has stopped tiuem to send
usbSetInterrupt( reportBuffer, 8);

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