GP2Y0E03夏普红外测距传感器简单使用

夏普红外测距传感器规格书引脚如下

一共七个引脚，如果要改地址的话还需要用到第八个引脚（当时改地址试了半天，仔细一看数据手册还有第八个引脚），第八个引脚Vpp如下图所示

和GP2Y0E03通讯是用IIC协议，数据手册上具体协议格式如下

笔者使用STM32F103系列单片机IIC通讯代码如下

void GP2_SDA_Mode(GPIOMode_TypeDef  sdagpio_mode)
{GPIO_InitTypeDef GPIO_InitStructure;GPIO_InitStructure.GPIO_Pin =GPIO_Pin_10; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;GPIO_InitStructure.GPIO_Mode = sdagpio_mode;GPIO_Init(GPIOB, &GPIO_InitStructure);
} 
void delay_us_us(u16 time)
{    u16 i=0;  while(time--){i=10;  while(i--) ;    }
}
void GP2_IIC_Start(void)
{GP2_IIC_SCL=0;GP2_SDA_Mode(GPIO_Mode_Out_OD);	GP2_IIC_SDA=1;	  	  GP2_IIC_SCL=1;delay_us_us(4);GP2_IIC_SDA=0;delay_us_us(4);GP2_IIC_SCL=0;
}void GP2_IIC_Stop(void)
{GP2_IIC_SCL=0;GP2_SDA_Mode(GPIO_Mode_Out_OD);	GP2_IIC_SCL=0;GP2_IIC_SDA=0;GP2_IIC_SCL=1; delay_us_us(4);GP2_IIC_SDA=1;delay_us_us(4);	GP2_IIC_SCL=0;	
}
uint8_t GP2_IIC_Wait_Ack(void)
{uint8_t ucErrTime=0;GP2_SDA_Mode(GPIO_Mode_IN_FLOATING);	   delay_us_us(4);	   GP2_IIC_SCL=1;delay_us_us(4);	while(GP2_READ_SDA){ucErrTime++;if(ucErrTime>250){GP2_IIC_Stop();return 1;}}GP2_IIC_SCL=0;//Ê±ÖÓÊä³ö0 	   return 0;  
}
void GP2_IIC_Ack(void)
{GP2_IIC_SCL=0;GP2_SDA_Mode(GPIO_Mode_Out_OD);	GP2_IIC_SDA=0;delay_us_us(4);GP2_IIC_SCL=1;delay_us_us(4);GP2_IIC_SCL=0;
}
void GP2_IIC_NAck(void){GP2_IIC_SCL=0;GP2_SDA_Mode(GPIO_Mode_Out_OD);	GP2_IIC_SDA=1;delay_us_us(4);GP2_IIC_SCL=1;delay_us_us(4);GP2_IIC_SCL=0;
}
void GP2_IIC_Send_Byte(uint8_t txd){                        uint8_t t;   GP2_SDA_Mode(GPIO_Mode_Out_OD);	 	    GP2_IIC_SCL=0;for(t=0;t<8;t++){              if(txd&0x80)GP2_IIC_SDA=1;			else GP2_IIC_SDA=0;				txd<<=1; 	  delay_us_us(4);  GP2_IIC_SCL=1;delay_us_us(4); GP2_IIC_SCL=0;	delay_us_us(4);}	 
} 
uint8_t GP2_IIC_Read_Byte(void){unsigned char i,receive=0;GP2_SDA_Mode(GPIO_Mode_IN_FLOATING);	        delay_us_us(4);for(i=0;i<8;i++ ){receive<<=1;		GP2_IIC_SCL=1;delay_us_us(4);if(GP2_READ_SDA)receive |= 0x01; delay_us_us(4); //1GP2_IIC_SCL=0; delay_us_us(4); //1}	return receive;
}
uint8_t GP2_IIC_Write_1Byte(uint8_t SlaveAddress,uint8_t REG_Address,uint8_t REG_data)
{GP2_IIC_Start();GP2_IIC_Send_Byte(SlaveAddress);if(GP2_IIC_Wait_Ack()){GP2_IIC_Stop();//ÊÍ·Å×ÜÏßreturn 1;//Ã»Ó¦´ðÔòÍË³ö}GP2_IIC_Send_Byte(REG_Address);GP2_IIC_Wait_Ack();	delay_us_us(5);GP2_IIC_Send_Byte(REG_data);GP2_IIC_Wait_Ack();	GP2_IIC_Stop();return 0;
}
uint8_t GP2_IIC_Read_1Byte(uint8_t SlaveAddress, uint8_t REG_Address)
{uint8_t REG_data; GP2_IIC_Start();GP2_IIC_Send_Byte(SlaveAddress);if(GP2_IIC_Wait_Ack()){GP2_IIC_Stop();//ÊÍ·Å×ÜÏßreturn 1;//Ã»Ó¦´ðÔòÍË³ö}		GP2_IIC_Send_Byte(REG_Address);GP2_IIC_Wait_Ack();GP2_IIC_Stop();//ÊÍ·Å×ÜÏßdelay_us_us(5);GP2_IIC_Start(); GP2_IIC_Send_Byte(SlaveAddress|0x01);GP2_IIC_Wait_Ack();REG_data = GP2_IIC_Read_Byte();GP2_IIC_Stop();return REG_data;
}uint8_t GP2_I2C_Read_nByte(uint8_t SlaveAddress, uint8_t REG_Address, uint8_t *buf, uint16_t len)
{GP2_IIC_Start();GP2_IIC_Send_Byte(SlaveAddress);if(GP2_IIC_Wait_Ack()) {GP2_IIC_Stop();//ÊÍ·Å×ÜÏßreturn 1;//Ã»Ó¦´ðÔòÍË³ö}GP2_IIC_Send_Byte(REG_Address);GP2_IIC_Wait_Ack();GP2_IIC_Stop();//ÊÍ·Å×ÜÏßdelay_us_us(5);GP2_IIC_Start(); GP2_IIC_Send_Byte(SlaveAddress|0x01);GP2_IIC_Wait_Ack();while(len){*buf = GP2_IIC_Read_Byte();if(1 == len){GP2_IIC_NAck();}else{GP2_IIC_Ack();}buf++;len--;}GP2_IIC_Stop();return STATUS_OK;
}
uint8_t GP2_I2C_Write_nByte(uint8_t SlaveAddress, uint8_t REG_Address, uint8_t *buf, uint16_t len)
{GP2_IIC_Start();GP2_IIC_Send_Byte(SlaveAddress);if(GP2_IIC_Wait_Ack()) {GP2_IIC_Stop();return 1;}GP2_IIC_Send_Byte(REG_Address);GP2_IIC_Wait_Ack();while(len--){GP2_IIC_Send_Byte(*buf++);GP2_IIC_Wait_Ack();}GP2_IIC_Stop();return STATUS_OK;
}

PS:使用时请注意镜面反射的影响，如果不改地址使用多个传感器模块，需控制使能脚依次读取数据