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来自「Freescale 系列单片机常用模块与综合系统设计」· 代码 · 共 47 行

/******************************************************************************
* Copyright (c) 2003, Motorola Inc.															*
* Motorola Confidential Proprietary															*
* --------------------------------------------------------------------------- *
* File name : 	   Accelerometer.h															*
* Project name: 	Low-Cost Accelerometer Evaluation Board							*
* --------------------------------------------------------------------------- *
*																										*
* Description : 	In this file, the Acceleromoter prototype functions are 		*
*						implemented. Also the global variables are declared.			*
******************************************************************************/

/* Global Variables */
extern Uchar near gu8TopAccValue;
extern bool  near gbResetTop;
extern bool  near gbOveraccState;
extern Uchar near gau8LcdFirstLine[];
extern Uchar near gu8AccSelect;
extern Uchar near gu8Wait5msCount;

/* Accelerometer-Adc correspondance */
#define MMA1220 					0x4A		
#define MMA1260 					0x4B


/* Status definition */
#define OK							TRUE
#define FAIL						FALSE

/* Min and Max values according to Accelerometers Electric Specs*/
#define MMA1220_MIN_DELTA		51		
#define MMA1220_MAX_DELTA		77		
#define MMA1260_MIN_DELTA		15		
#define MMA1260_MAX_DELTA		46		

/* Constants for the data conversion to Gs */
#define MMA1220_CONST			128
#define MMA1260_CONST			61		

/* Function Prototypes */
Uchar AccDataConvGs(Uchar);
void AccTest(Uchar);
bool AccDataFormat(Uchar);

/******************************************************************************
* End Accelerometer.h																			*
******************************************************************************/