firmware/clock.h

   1 /*
   2   clock.h - part of USBasp
   3
   4   Autor..........: Thomas Fischl <tfischl@gmx.de>
   5   Description....: Provides functions for timing/waiting
   6   Licence........: Free under certain conditions. See Documentation.
   7   Creation Date..: 2005-02-23
   8   Last change....: 2006-11-16
   9 */
  10
  11 #ifndef __clock_h_included__
  12 #define __clock_h_included__
  13
  14 #define F_CPU           12000000L   /* 12MHz */
  15 #define TIMERVALUE      TCNT0
  16 #define CLOCK_T_320us   60
  17
  18 #ifdef __AVR_ATmega8__
  19 #define TCCR0B  TCCR0
  20 #endif
  21
  22 /* set prescaler to 64 */
  23 #define clockInit()  TCCR0B = (1 << CS01) | (1 << CS00);
  24
  25 /* wait time * 320 us */
  26 void clockWait(uint8_t time);
  27
  28 #endif /* __clock_h_included__ */