float.h

来自「AVR系列被广泛应用的单片机MEGA8开发(原理图)及例程」· C头文件 代码 · 共 21 行

#ifndef __AVRCLASSIC_H
#define __AVRCLASSIC_H

#warning "This header file is NOT current. Please use io???v.h instead"

#include "avr_common.h"

/* Not all devices implement these registers.
 * Please refer to the Atmel device specifications
 *
 * BEWARE THAT THE BIT DEFINITIONS IS VALID ONLY FOR THE 4434/8535.
 * DOUBLE CHECK THE ATMEL DATA BOOK TO MAKE SURE THEY WORK FOR THE
 * DEVICES YOU ARE INTERESTED IN!!
 *
 */
/* IO Registers as memory mapped addresses
 */
#define SREG 	(*(volatile unsigned char *)0x5F)
	#define	SREG_GIE	0x80		/* Global Interrupt Enable. */
	#define	SREG_BCS	0x40		/* Bit Copy Storage. */
	#define	SREG_HCF	0x20		/*