util.h

来自「LCD using AVR controller」· C头文件 代码 · 共 61 行

/*	Util.h
*
*	Useful utilities.
*
*	Also includes app-specific config info (since all library
*	files include this file).
*
*	#define one of the following values to select the
*	appropriate code based on your microcontroller (uC)
*	clock speed. Most of the library classes require this.
*
*	define       uC clk
*	----------   ------
*	CLOCK_8M      8 MHz
*	CLOCK_16M    16 MHz
*
*	Revisions:
*		07-13-06	included in LCDSample project
*		07-05-06	version 1 in master library
*
*	Written by Cathy Saxton
*	[e-mail]
*/

#pragma once

typedef unsigned char uchar;
typedef unsigned int uint;
typedef unsigned long ulong;
typedef unsigned short ushort;

enum
{
	fFalse = 0,
	fTrue = 1
};

#define Abs(x) (((x) < 0) ? (-(x)) : (x))
#define DIM(a) (sizeof(a) / sizeof(a[0]))

/* macros to set and clear bits in registers */
#define SetBit(sfr, bit) ((sfr) |= (1 << (bit)))
#define ClearBit(sfr, bit) ((sfr) &= ~(1 << (bit)))


/* include the app-specific configuration information */
#include "Config.h"

/* check for microcontroller clock speed definition */
#if !defined(CLOCK_8M) && !defined(CLOCK_16M)
#error "no CLOCK_* definition (see Util.h)"
#endif

/* check for microcontroller definition (this define is set by -mmcu=
   argument to compiler) */
#if !defined(__AVR_ATmega8__) && !defined(__AVR_ATmega16__) \
	&& !defined(__AVR_ATmega32__)&& !defined(__AVR_ATmega644__) \
	&& !defined(__AVR_ATmega128__)
#error "unrecognized microcontroller (see Util.h)"
#endif