MLX90615和STC12C5604AD的SMBusPWM 通信

1 目的

该文档的主要目的是描述怎样实现单片机和红外温度计MLX90615的SMBus通信。代码是基于STC12C5604AD单片机的。实例给出了由C语言实现MLX90615读取物体温度，写入数据到MLX90615的功能。

2 C 代码

2.1 由MLX90615读取温度部分

实例给出了应用C语言来实现从MLX90615中读取物体温度的程序。为了使程序操作和运行简单起见，整个项目被分为几个子项目。在该文档中整个C程序分为主文件 （用来实现对物体温度的读取、改变SMBus地址、改变发射率参数功能）；子文件（具体描述SMBus通信的起始状态，终止状态，发送和接受数据）； 子文件（包含了利用SMBus通信由MLX90615读取数据，对MLX90615写入数据和PEC校验码计算的程序）；子文件（调用延迟函数）；子文件（将十进制转换为十六进制）；子文件（根据十六进制数值计算温度读数）；子文件（在数字LEDs上显示温度读数）。在主文件的头文件中引用相应的子文件.h文件，以将所有功能综合、链接起来。

2.2 STCSTCSCLSCLSCLSCLDATASCLSCLSCLSCLDATASTCSCLSCLSCLSCLSCLSCLSCLSCLSCLSCLSCLSCLSC

LSCLSCLSCLSCLSCLSCLSCLACKSCLSCLSCLSCLACKSTCSCLSCLCRCCRCCRCRAMSLASLASLASLASLASLACRCSLASLASLASLASTCSTCSTCSCLSCLSCL文件介绍

//----------------------------------------------------------------------------------------------------------------------------------------//

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//----------------------------------------------------------------------------------------------------------------------------------------// 头文件保护

//----------------------------------------------------------------------------------------------------------------------------------------// #ifndef SMBUS_CM_H #define SMBUS_CM_H

//----------------------------------------------------------------------------------------------------------------------------------------// 函数声明

//----------------------------------------------------------------------------------------------------------------------------------------// void start_bit(); void stop_bit();

void send_bit(unsigned char bit_out); unsigned char receive_bit(); unsigned char slave_ack();

void TX_byte(unsigned char TX_buffer); unsigned char RX_byte(unsigned char ack_nack);

#endif

//----------------------------------------------------------------------------------------------------------------------------------------//

//----------------------------------------------------------------------------------------------------------------------------------------//

//----------------------------------------------------------------------------------------------------------------------------------------// 头文件保护

//----------------------------------------------------------------------------------------------------------------------------------------// #ifndef SMBUS_OP_H #define SMBUS_OP_H

//----------------------------------------------------------------------------------------------------------------------------------------// 函数声明

//----------------------------------------------------------------------------------------------------------------------------------------// unsigned char PEC_cal(unsigned char pec[],int n);

unsigned long int MEM_READ(unsigned char slave_addR,unsigned char cmdR);

void EEPROM_WRITE(unsigned char slave_addW,unsigned char cmdW,unsigned char DataL,unsigned char DataH);

#endif

//----------------------------------------------------------------------------------------------------------------------------------------//

//----------------------------------------------------------------------------------------------------------------------------------------//

//----------------------------------------------------------------------------------------------------------------------------------------// 函数声明

//----------------------------------------------------------------------------------------------------------------------------------------// void Delay(unsigned int N);

//----------------------------------------------------------------------------------------------------------------------------------------//

//----------------------------------------------------------------------------------------------------------------------------------------//

//----------------------------------------------------------------------------------------------------------------------------------------// 函数声明

//----------------------------------------------------------------------------------------------------------------------------------------// unsigned int *dec2hex(float e);

//----------------------------------------------------------------------------------------------------------------------------------------//

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//----------------------------------------------------------------------------------------------------------------------------------------// 函数声明

//----------------------------------------------------------------------------------------------------------------------------------------// extern unsigned int *CALTEMP(unsigned long int TEMP);

//----------------------------------------------------------------------------------------------------------------------------------------//

//----------------------------------------------------------------------------------------------------------------------------------------//

//----------------------------------------------------------------------------------------------------------------------------------------// 函数声明

//----------------------------------------------------------------------------------------------------------------------------------------// extern void show(unsigned int mahh[],int number);

//----------------------------------------------------------------------------------------------------------------------------------------//

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