【正文】 rature pensated humidity float t_C。 // t_C: Temperature [C] t_C=t* 40。 //calc. temperature from ticks to [C] rh_lin=C3*rh*rh + C2*rh + C1。 //calc. humidity from ticks to [%RH] rh_true=(t_C25)*(T1+T2*rh)+rh_lin。 //calc. temperature pensated humidity [%RH] if(rh_true100)rh_true=100。 //cut if the value is outside of if(rh_true)rh_true=。 //the physical possible range *p_temperature=t_C。 //return temperature [C] *p_humidity=rh_true。 //return humidity[%RH]}/*******************第二部分SHT10設置結束****************************************//*********************按鍵處理模塊************************************************/uint flag=65。//定義上限值,初始值設定為65 ，設置為全局變量uchar key。sbit ADDE=P1^3。 //+sbit SUBK=P1^4。 //void keyscan(){ ADDE=1。 SUBK=1。 key=ADDEamp。amp。SUBK。 if(key==0) { delay_n10us(100)。 if(key==0) { if(ADDE==0) { {if(flag100) { flag++。 } else { flag=0。 } } while(!ADDE)。 } if(SUBK==0) { if(flag0) { flag。 } else { flag=99。 } while(!SUBK)。 //鎖定狀態(tài) } } }}/********************************報警模塊*****************************************/sbit led=P1^7。 //指示燈sbit beep=P3^6。 //蜂鳴器/**********************************************************************************//***************************************主函數(shù)*************************************/void main(void){ value humi_val,temp_val。 uint shijishidu。 //實際濕度 unsigned char error,checksum。 uint wendu,shidu。 LCD_init()。 s_connectionreset()。 LCD_disp_str(8,2,T)。 LCD_disp_str(0,2,R)。/*****************************初始化溫度顯示區(qū)***********************************/ LCD_disp_str(0,1,shidu_H: %)。/*****************************初始化濕度顯示區(qū)***********************************/ LCD_disp_str(1,2, . %)。 delay_n10us(20000)。 // while(1) { error=0。 error+=s_measure((unsigned char*) amp。,amp。checksum,HUMI)。 //measure humidity error+=s_measure((unsigned char*) amp。,amp。checksum,TEMP)。 //measure temperature if(error!=0) { s_connectionreset()。 //in case of an error: connection reset } else { keyscan()。 LCD_disp_char(8,1,(flag/10)+39。039。)。 LCD_disp_char(9,1,(flag%10)+39。039。)。 =(float)。 //converts integer to float =(float)。 //converts integer to float calc_sht10(amp。,amp。)。 //calculate humidity, temperature wendu=10*。 LCD_disp_char(9,2,0x3a)。 LCD_disp_char(10,2,(wendu%1000)/100+39。039。)。 //顯示溫度十位 LCD_disp_char(11,2,(wendu%100)/10+39。039。)。 //顯示溫度個位 LCD_disp_char(12,2,0x2e)。 // LCD_disp_char(13,2,(wendu%10)+39。039。)。 //顯示溫度小數(shù)點后第一位 LCD_disp_char(14,2,0xdf)。 LCD_disp_char(15,2,0x43)。 shidu=10*。 LCD_disp_char(1,2,0x3a)。 LCD_disp_char(2,2,(shidu%1000)/100+39。039。)。 //顯示濕度十位 LCD_disp_char(3,2,(shidu%100)/10+39。039。)。 //顯示濕度個位 LCD_disp_char(5,2,(shidu%10)+39。039。)。 //顯示濕度小數(shù)點后第一位 /****************報警部分************************/ shijishidu=(shidu%1000)/10+(shidu%100)/10。 //實際的濕度值； if(flag=shijishidu) { led=0。beep=0。 } if(flagshijishidu) { led=1。beep=1。 } } //wait approx. to avoid heating up SHTxx delay_n10us(80000)。 // }}附錄四 外文文獻翻譯　　　　　　Temperature Sensor ICs Simplify Designs When you set out to select a temperature sensor, you are no longer limited to either an analog output or a digital output device. There is now a broad selection of sensor types, one of which should match your system39。s needs. Until recently, all the temperature sensors on the market provided analog outputs. Thermistors, RTDs, and thermocouples were followed by another analogoutput device, the silicon temperature sensor. In most applications, unfortunately, these analogoutput devices require a parator, an ADC, or an amplifier at their output to make them useful. Thus, when higher levels of integration became feasible, temperature sensors with digital interfaces became available. These ICs are sold in a variety of forms, from simple devices that signal when a specific temperature has been exceeded to those that report both remote and local temperatures while providing warnings at programmed temperature settings. The choice now isn39。t simply between analogoutput and digitaloutput sensors。 there is a broad range of sensor types from which to choose. Classes of Temperature SensorsFour temperaturesensor types are illustrated in Figure 1. An ideal analog sensor provides an output voltage that is a perfectly linear function of temperature (A). In the digital I/O class of sensor (B), temperature data in the form of multiple 1s and 0s are passed to the microcontroller, often via a serial bus. Along the same bus, data are sent to the temperature sensor from the microcontroller, usually to set the temperature limit at which the alert pin39。s digital output will trip. Alert interrupts the microcontroller when the temperature limit has been exceeded. This type of device can also provide fan control. Figure 1. Sensor and IC manufacturers currently offer four classes of temperature sensors.Analogplus sensors (C) are available with various types of digital outputs. The VOUT versus temperature curve is for an IC whose digital output switches when a specific temperature has been exceeded. In