IIC_TMP102.zip_tmp102_tmp102 程序_tmp102读取温度

//************************************************************************ //Build Date:2014-07-16 //Editor:ZhaoYi //************************************************************************ #include "cc430F5137.h" #include "TMP102.h" void Delay_1u( void) { asm("nop"); } void Bus_IIC_Start(void) //IIC总线起始信号 { /**起始信号：SCL为1时SDA产生下降沿**/ WriteSCL1(); Delay_1u(); WriteSDA1(); Delay_1u(); WriteSDA0(); Delay_1u(); WriteSCL0(); Delay_1u(); } void Bus_IIC_Stop(void) //IIC总线停止信号 { /**停止信号：SCL为1时SDA产生上升沿**/ WriteSDA0(); Delay_1u(); WriteSCL1(); Delay_1u(); WriteSDA1(); Delay_1u(); } void Bus_IIC_Ack(void) //IIC总线应答信号 { UINT8 i=0; WriteSDA1(); WriteSCL1(); Delay_1u(); ReadSDA(); while( (BIT3&P1IN)&&(i<255) ) i++; WriteSCL0(); Delay_1u(); } void Bus_IIC_WriteByte( UINT8 iic_byte ) //IIC总线写入一个字节 { for(UINT8 i=0;i<8;i++) { if( (iic_byte<<i)&0x80 ) //发送1 { WriteSDA1(); WriteSCL1(); //一定要在SCL为1的条件下发送数据：保证数据的有效性 Delay_1u(); WriteSCL0(); Delay_1u(); } else //发送0 { WriteSDA0(); WriteSCL1(); //一定要在SCL为1的条件下发送数据：保证数据的有效性 Delay_1u(); WriteSCL0(); Delay_1u(); } } } UINT8 Bus_IIC_ReadByte(void) //IIC总线读出一个字节 { UINT8 b=0; WriteSDA1(); for(UINT8 i=0;i<8;i++) { WriteSCL0(); Delay_1u(); WriteSCL1(); Delay_1u(); ReadSDA(); if( BIT3&P1IN ) { b=b<<1; b++; } else b=b<<1; } WriteSCL0(); return b; } void TMP102_Start(void) //启动温度采样 { Bus_IIC_Start(); Bus_IIC_WriteByte( TMP102_IIC_ADDRESS ); Bus_IIC_Ack(); Bus_IIC_WriteByte( 0x01 ); //Write Pointer Register Byte to select Configuration Register(TMP102.pdf,P5) Bus_IIC_Ack(); Bus_IIC_WriteByte( 0xE1 ); //Configuration Register Byte1:Start a single conversion,12-bit resolution Bus_IIC_Ack(); Bus_IIC_WriteByte( 0xA0 ); //Configuration Register Byte2:Conversion Rate:4Hz,Normal Mode:12-bit data format Bus_IIC_Ack(); Bus_IIC_Stop(); } void TMP102_ShutDown(void) //关断温度采样 { Bus_IIC_Start(); Bus_IIC_WriteByte( TMP102_IIC_ADDRESS ); Bus_IIC_Ack(); Bus_IIC_WriteByte( 0x01 ); //Write Pointer Register Byte to select Configuration Register(TMP102.pdf,P5) Bus_IIC_Ack(); Bus_IIC_WriteByte( 0x61 ); //Configuration Register Byte1:shut down all device to reduce current consumption Bus_IIC_Ack(); Bus_IIC_WriteByte( 0xA0 ); //Configuration Register Byte2:nonsense Bus_IIC_Ack(); Bus_IIC_Stop(); } INT16 TMP102_Capture_Read(void) //读温度采样结果 { INT16 value; UINT8 os_value; UINT16 temper; Bus_IIC_Start(); Bus_IIC_WriteByte( TMP102_IIC_ADDRESS ); Bus_IIC_Ack(); Bus_IIC_WriteByte( 0x01 ); //Write Pointer Register Byte to select Configuration Register(TMP102.pdf,P5) Bus_IIC_Ack(); Bus_IIC_Stop(); Bus_IIC_Start(); Bus_IIC_WriteByte( TMP102_IIC_ADDRESS+1 ); //1 Read 0 Write,Read Configuration Register Bus_IIC_Ack(); os_value = Bus_IIC_ReadByte(); //Read Configuration Register Byte1 WriteSDA0(); WriteSCL1(); Delay_1u(); WriteSCL0(); Delay_1u(); Bus_IIC_ReadByte(); //Read Configuration Register Byte2 WriteSDA0(); WriteSCL1(); Delay_1u(); WriteSCL0(); Delay_1u(); Bus_IIC_Stop(); if( (os_value&0x80)!=0 ) //Read Configuration Register Byte1_OS-bit to determine whether the conversion is ended,1 ended 0 not ended { Bus_IIC_Start(); Bus_IIC_WriteByte( TMP102_IIC_ADDRESS ); Bus_IIC_Ack(); Bus_IIC_WriteByte( 0x00 ); //Write Pointer Register Byte to select Temperature Register(TMP102.pdf,P5) Bus_IIC_Ack(); Bus_IIC_Stop(); Bus_IIC_Start(); Bus_IIC_WriteByte( TMP102_IIC_ADDRESS+1 ); //Read Temperature Register Bus_IIC_Ack(); temper = Bus_IIC_ReadByte(); //读高字节温度值 WriteSDA0(); WriteSCL1(); Delay_1u(); WriteSCL0(); Delay_1u(); temper <<= 8; temper |= Bus_IIC_ReadByte(); //读高字节温度值 WriteSDA0(); WriteSCL1(); Delay_1u(); WriteSCL0(); Delay_1u(); Bus_IIC_Stop(); temper >>= 4; if( temper<0x0800 ) //正温度，则直接读数 value = (INT16)temper; else value = (INT16)(0xF000|temper); //负温度，加符号位 return value; } else return FALSE; }