lm75.h

数字温度传感器LM75的使用与温度测量的C程序

/****************************************Copyright (c)**************************************************
**                               Guangzhou ZHIYUAN ELECTRONIC CO.,LTD.
**                                      Research centre
**                         http://www.zyinside.com, http://www.zlgmcu.com
**
**---------------------------------------File Info-----------------------------------------------------
** File name:			  lm75.c
** Latest modified Date:  2006-2-20
** Latest Version:		  1.0
** Descriptions:		  Provide I2C accessor Marco for read or write a byte data.
**                        and LM75 device class definition
**                        and function declaration 
**
**------------------------------------------------------------------------------------------------------
** Created by:			  Zhou Shuwu
** Created date:		  2006-2-20
** Version:				    1.0
** Descriptions:		  The original version
**
**------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
** Version:
** Descriptions:
**
********************************************************************************************************/
#ifndef __LM75_H__
#define __LM75_H__

#include <stddef.h>
#include <sys/termios.h>
#include "alt_types.h"
#include "oc_i2c_regs.h"

#include "sys/alt_dev.h"
#include "sys/alt_warning.h"
#include "os/alt_sem.h"

#ifdef __GLOBAL_DEF__
#define __EXT__   
#else
#define __EXT__ extern
#endif

#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */


/************************************************************************************
**          Registers in LM75 defined here                                       *
*************************************************************************************/ 

#define  LM75_ADDRESS       	0x90   //LM75 device address  

//Offset of the registers defined here
#define LM75_TEMP        		0x00	//Temperature Register.
#define LM75_CONFIG        		0x01	//Configuration Register.
#define LM75_THYST        		0x02	//Hysteresis Register.
#define LM75_TOS	       		0x03	//Over-temp Shutdown threshold Register.

#define  NO_INT                 0x00    //No interrupt event
#define  INT_EVENT              0x01    //interrupt event occur

/* LM75 device class definition       */
typedef struct
{
  alt_u32        base;          /* base address of open i2c core  */
  alt_u32        pio_base;      /* base address of PIO related to LM75_INT  */
  alt_u32        irq;           /* LM75_INT PIO interrupt number               */
  alt_u8         dev_addr;      /* device address of LM75     */
  alt_u8         int_flag;      /* interrupt flag,1:interrupt; 0: no interrupt*/
} LM75_dev;

/* This function is responsible for performing all the run time initialization
 * for a device instance
 */
__EXT__ int LM75_Init(LM75_dev* dev, alt_u32 i2c_freq);


__EXT__ int LM75_ReadReg(LM75_dev* dev, alt_u8 reg, alt_u8* content, alt_u16 num);


__EXT__ int LM75_WriteReg(LM75_dev* dev, alt_u8 reg, alt_u8* content, alt_u16 num);

extern void TemperatureInit(void);

extern int TempertureGet(alt_u8* temperBuf);
#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* __LM75_H__ */

/**********************end****************************************/