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Fix for some strange behaviours during board reset

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This commit is contained in:
Cristian Maglie
2012-03-07 16:21:04 +01:00
parent d06710ebe5
commit 177746aa7f
1 changed files with 7 additions and 1 deletions
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6
hardware/arduino/cores/arduino/USBCore.cpp
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@ -637,6 +637,12 @@ void USB_::attach()
PLLCSR = 0x12; // Need 16 MHz xtal PLLCSR = 0x12; // Need 16 MHz xtal
while (!(PLLCSR & (1<<PLOCK))) // wait for lock pll while (!(PLLCSR & (1<<PLOCK))) // wait for lock pll
; ;
// Some tests on specific versions of macosx (10.7.3), reported some
// strange behaviuors when the board is reset using the serial
// port touch at 1200 bps. This delay fixes this behaviour.
delay(1);
USBCON = ((1<<USBE)|(1<<OTGPADE)); // start USB clock USBCON = ((1<<USBE)|(1<<OTGPADE)); // start USB clock
UDIEN = (1<<EORSTE)|(1<<SOFE); // Enable interrupts for EOR (End of Reset) and SOF (start of frame) UDIEN = (1<<EORSTE)|(1<<SOFE); // Enable interrupts for EOR (End of Reset) and SOF (start of frame)
UDCON = 0; // enable attach resistor UDCON = 0; // enable attach resistor