mydelay.h

我改写的在TFT上显示SD卡中BMP文件的程序

#ifndef F_CPU
/* prevent compiler error by supplying a default */
# warning "F_CPU defined 8000000UL"
# define F_CPU 8000000UL
#endif

#ifndef __DELAY_H__
#define __DELAY_H__


#include <avr/io.h>
#include <util/delay.h>






#ifdef __OPTIMIZE__
	#define DelayUs(delay)	_delay_us(delay)
	#define DelayMs(MS)	_delay_ms(MS)
#else

void DelayUs(unsigned int delay)
{	unsigned int i;
	for(i=0;i<delay/5;i++);

}

void DelayMs(unsigned int MS)
{
	unsigned int i;
	for(i=0;i<MS;i++)
		{
		for(i=0;i<F_CPU/(8000000UL)*361;i++);
		}
}
#endif

#endif