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Change AVRISP project's timeout to be interrupt based again, but make the interrupt itself interruptable and use a seperate assembly file to hand-optimize the ISR code.

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Removed the cast to uint16_t on the set baud rate in the USBtoSerial project, so that the higher >1M baud rates can be selected (thanks to Steffan).
This commit is contained in:
Dean Camera 2010-05-02 05:16:34 +00:00
parent 9a1560dc05
commit 3d28d53c3e
11 changed files with 66 additions and 117 deletions
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23
Projects/AVRISP-MKII/Lib/Timeout.S Normal file
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@ -0,0 +1,23 @@
#include <avr/io.h>
#include "V2Protocol.h"
.global TIMER0_COMPA_vect
TIMER0_COMPA_vect:
sei
push r24
in r24, 0x3f
push r24
in r24, TimeoutMSRemaining
and r24, r24
breq Epilogue
subi r24, 0x01
out TimeoutMSRemaining, r24
Epilogue:
pop r24
out 0x3f, r24
pop r24
reti