clock.c

用mega8模拟usb做下载线（AVR）

/*
  clock.c - part of USBasp

  Autor..........: Thomas Fischl <[e-mail]> 
  Description....: Provides functions for timing/waiting
  Licence........: Free under certain conditions. See Documentation.
  Creation Date..: 2005-02-23
  Last change....: 2005-04-20
*/

#include <inttypes.h>
#include <avr/io.h>
#include "clock.h"

/* wait time * 320 us */
void clockWait(uint8_t time) {
  
  uint8_t i;
  for (i = 0; i < time; i++) {
    uint8_t starttime = TIMERVALUE;
    while ((uint8_t) (TIMERVALUE - starttime) < CLOCK_T_320us) {}	
  }
}