【正文】 } if (adval == test) //比較前8位與后8位的值，如果不相同舍去。 _nop_()。 _nop_()。 if (DATO) test |= 0x80。 i 8。 else adval |= 0x00。 Clk = 0。 Clk = 1。i++ ) //讀取前8位的值 { _nop_()。 for( i = 0。 } Clk = 0。 Clk = 1。 DATI = 1。 _nop_()。 //通道1的第一位 _nop_()。 } else { Clk = 0。 Clk = 1。 DATI = 0。 _nop_()。 //通道0的第一位 _nop_()。 if ( CH == 0x00 ) //通道選擇 { Clk = 0。 Clk = 1。 CS = 0。 //初始化 DATI = 1。 test = 0x00。 //ADunsigned char adc0832(unsigned char CH) { unsigned char i,test,adval。 sbit DATO = P1^2。 sbit Clk = P1^1。 U8checkdata=U8checkdata_temp。 U8T_data_H=U8T_data_H_temp。 if(U8temp==U8checkdata_temp) { U8RH_data_H=U8RH_data_H_temp。 DATADH=1。 COM()。 COM()。 COM()。 COM()。 //數(shù)據(jù)接收狀態(tài) COM()。amp。 U8FLAG=2。amp。 //判斷從機是否有低電平響應信號 如不響應則跳出，響應則向下運行 if(!DATADH) //T ! { U8FLAG=2。 Delay_10usDH()。 Delay_10usDH()。 DATADH=1。 //0 }//rof}//濕度讀取子程序 void RH(void){ //主機拉低18ms DATADH=0。 //判斷數(shù)據(jù)位是0還是1 // 如果高電平高過預定0高電平值則數(shù)據(jù)位為 1 U8data=1。U8FLAG++)。 while((DATADH)amp。 if(DATADH)U8temp=1。 Delay_10usDH()。U8FLAG++)。 while((!DATADH)amp。i8。}//初始化 void COM(void){ uchar i。a0。b0。}//延時void Delay_10usDH(void){ uchar a,b。a0。b0。//延時void DelayDH(uint j){ uint a,b。uchar U8T_data_H_temp,U8T_data_L_temp,U8RH_data_H_temp,U8RH_data_L_temp,U8checkdata_temp。uchar U8temp。附錄C//IO口定義sbit DATADH = P2^7 。這種軟件代替硬件的控制技術也稱為微控制技術，是傳統(tǒng)控制技術的一次革命?！　【C上所述，單片機已成為計算機發(fā)展和應用的一個重要方面，單片機應用的重要意義還在于，它從根本上改變了傳統(tǒng)的控制系統(tǒng)設計思想和設計方法。有時候，我們還可以模擬人為使用中，可能發(fā)生的破壞情況。 如何測試單片機系統(tǒng)的可靠性。在每次程序復位時，通過判斷這些標志，可以判斷出不同的復位原因；還可以根據(jù)不同的標志直接跳到相應的程序。單片機干擾最常見的現(xiàn)象就是復位；至于程序跑飛，其實也可以用軟件陷阱和看門狗將程序拉回到復位狀態(tài)；所以單片機軟件抗干擾最重要的是處理好復位狀態(tài)。防止干擾最有效的方法是去除干擾源、隔斷干擾路徑，但往往很難做到，所以只能看單片機抗干擾能力夠不夠強了。所以如果對這些特性不了解，那么調試起來問題就會很多，反而導致執(zhí)行效率低于匯編語言。對于復雜而開發(fā)時間緊的項目時，可以采用C語言，但前提是要求你對該MCU系統(tǒng)的C語言和C編譯器非常熟悉，特別要注意該C編譯系統(tǒng)所能支持的數(shù)據(jù)類型和算法。在今后編程的時候，使用編譯效率最高的語句。如果使用C編程時，要達到最高的效率，最好熟悉所使用的C編譯器。 如何提高C語言編程代碼的效率。應用參數(shù)：這些應用參數(shù)常表現(xiàn)為一些單片機、功能單元的應用條件。物理參數(shù)：這些參數(shù)主要是系統(tǒng)的輸入?yún)?shù)，它包括激勵參數(shù)、采集處理中的運行參數(shù)和處理結束的結果參數(shù)。 如何減少程序中的bug。 單片機開發(fā)中的幾個基本技巧 在單片機應用開發(fā)中，代碼的使用效率問題、單片機抗干擾性和可靠性等問題仍困擾著許多研發(fā)者。 一、單片機的特點應用　　單片機的特點主要有：高集成度，體積小，高可靠性；控制功能強；低電壓，低功耗，便于生產便攜式產品；易擴展；優(yōu)異的性能價格比。本系統(tǒng)以單片機系統(tǒng)為核心，通過與智能傳感器相連，采集并存儲智能傳感器的測量數(shù)據(jù)，經(jīng)過分析處理將結果顯示于LCD液晶屏，從而實現(xiàn)了室內環(huán)境的監(jiān)測。 aging test。 also can jump directly to different signs corresponding program. This allows a continuous run, users will not notice when using procedures had to be reset again.4) How to test the reliability of microputer systems. When a single chip system design is pleted, microputer systems for different products have different test items and methods, but some must be tested: Test SCM software features perfection。 so SCM software, the most important interference handle reset state. General SCM will have some signs registers can be used to determine the reasons for reduction。s bug. Procedures for how to reduce the bug, should first consider the system operation should be considered out of range management parameters are as follows. Physical parameters: These parameters are the input parameters, which include incentive parameters, acquisition and processing of the operating parameters and processing parameters of the end result. Resource parameters: These parameters are system circuit, device, functional unit resources, such as memory, storage unit length, stack depth. Application parameters: these parameters Changbiaoxianwei Some SCM applications, functional unit of application conditions. Process parameters: the orderly operation of that system changes in the parameters.2) How to improve the efficiency of C language programming code. Microcontroller using C language programming is the development and application of microcontroller inevitable trend. If you use the C programming, to achieve maximum efficiency, the best familiar with the use of C piler. First to test after each C piler assembly language statements corresponding to the number of rows, so that efficiency can be very clear. When programming in the future, the most efficient use of piled statements. Various Cpilers are some differences in the efficiency of it will be different piler, excellent C pilers for embedded system code size and execution time than by just the same function written in assembly language 520% long Chengdu. For plex and tight project development time, you can use C language, but only ask you for the MCU system C language and C pilers are very familiar with, with particular attention to the C piler system can support data types and algorithms. Although the C language is the most mon form of highlevel language, but because of their different MCU C piler system manufacturers have some differences, especially in some special function module operation. So, do not know if these characteristics, then the problem would be a lot of debugging them, but lead to the implementation efficiency is lower than assembly language.3) How to solve the single chip interference issues. The most effective way to prevent interference is to remove the interference source, cut off the interference path, but often difficult to achieve, we can only enough antiinterference ability of the SCM strengthened. Hardware system to improve antijamming ability, interference with its flexible design software, saving hardware resources, reliability and more and more attention. The most mon phenomenon of SCM is the interference reduction。 Automotive electronics。 Commercial marketing facilities。 In the introduction of various instruments MCU to make intelligent instrumentation to improve the autom