Projects/AVRISP-MKII/Lib/Timeout.S

   1 #include <avr/io.h>
   2 #include "V2Protocol.h"
   3
   4 .global TIMER0_COMPA_vect
   5 TIMER0_COMPA_vect:
   6         sei
   7         push    r24
   8         in      r24, 0x3f
   9         push    r24
  10
  11         in      r24, TimeoutMSRemaining
  12         and     r24, r24
  13         breq    Epilogue
  14         subi    r24, 0x01
  15         out     TimeoutMSRemaining, r24
  16
  17 Epilogue:
  18         pop     r24
  19         out     0x3f, r24
  20         pop     r24
  21         reti
  22
  23