STC单片机串口输出ADXL335角度值

STC单片机串口输出ADXL335角度值：

 //*****************************************************
 //名称：单片机串口输出ADXL335角度值
 //使用单片机：stc12c5a60s2
 //供电：电压5v
 //晶振：11.0592m
 //X轴->(ADC0)P1.0
 //Y轴->(ADC1)P1.1
 //Z轴->(ADC1)P1.2
 //用pc串口助手显示时，选择字符显示
 //参考宏晶网址例程
 //*****************************************************
 #include "reg51.h"
 #include "intrins.h"
 #include  <math.h>    //Keil library
 #include  <stdio.h>   //Keil library

 //#define FOSC    18432000L
 #define FOSC    11059200L  //晶振11.0592M
 #define BAUD    9600

 typedef unsigned char BYTE;
 typedef unsigned int WORD;

 #define   uchar unsigned char
 #define   uint unsigned int    

 /*Declare SFR associated with the ADC */
 sfr AUXR1       =   0XA2;
 sfr ADC_CONTR   =   0xBC;           //ADC control register
 sfr ADC_RES     =   0xBD;           //ADC high 8-bit result register
 sfr ADC_RESL    =   0xBE;
 sfr ADC_LOW2    =   0xBE;           //ADC low 2-bit result register
 sfr P1ASF       =   0x9D;           //P1 secondary function control register

 /*Define ADC operation const for ADC_CONTR*/
 #define ADC_POWER   0x80            //ADC power control bit
 #define ADC_FLAG    0x10            //ADC complete flag
 #define ADC_START   0x08            //ADC start control bit
 #define ADC_SPEEDLL 0x00            //420 clocks
 #define ADC_SPEEDL  0x20            //280 clocks
 #define ADC_SPEEDH  0x40            //140 clocks
 #define ADC_SPEEDHH 0x60            //70 clocks

 void InitUart();
 void InitADC();
 void SendData(BYTE dat);
 int GetADCResult(BYTE ch);
 void Delay(WORD n);
 uchar ge,shi,bai,qian,wan;           //显示变量

 void conversion(uint temp_data)
 {
     wan=temp_data/+0x30 ;
     temp_data=temp_data%;   //取余运算
     qian=temp_data/+0x30 ;
     temp_data=temp_data%;    //取余运算
     bai=temp_data/+0x30   ;
     temp_data=temp_data%;     //取余运算
     shi=temp_data/+0x30    ;
     temp_data=temp_data%;      //取余运算
     ge=temp_data+0x30;
 }

 /*----------------------------
 Get ADC result
 ----------------------------*/
 int GetADCResult(BYTE ch)
 {   int AD10bitResult;
     ADC_CONTR = ADC_POWER | ADC_SPEEDLL | ch | ADC_START;
     _nop_();                        //Must wait before inquiry
     _nop_();
     _nop_();
     _nop_();
     while (!(ADC_CONTR & ADC_FLAG));//Wait complete flag
     ADC_CONTR &= ~ADC_FLAG;         //Close ADC

     AD10bitResult=ADC_RES;
     AD10bitResult<<=;
     AD10bitResult|=ADC_RESL;
     return AD10bitResult;                  //Return 10BIT ADC result
 }
 /*----------------------------
 Initial UART
 ----------------------------*/
 void InitUart()
 {
     SCON = 0x5a;                    //8 bit data ,no parity bit
     TMOD = 0x20;                    //T1 as 8-bit auto reload
     TH1 = TL1 = -(FOSC///BAUD); //Set Uart baudrate
     TR1 = ;                        //T1 start running
 }

 /*----------------------------
 Initial ADC sfr
 ----------------------------*/
 void InitADC()
 {
     P1ASF = 0xff;                   //Open 8 channels ADC function

     AUXR1=AUXR1|0X04;              //ad值左对齐
     ADC_RES = ;                    //Clear previous result
     ADC_CONTR = ADC_POWER | ADC_SPEEDLL;
     Delay();                       //ADC power-on and delay
 }

 /*----------------------------
 Send one byte data to PC
 Input: dat (UART data)
 Output:-
 ----------------------------*/
 void SendData(BYTE dat)
 {
     while (!TI);                    //Wait for the previous data is sent
     TI = ;                         //Clear TI flag
     SBUF = dat;                     //Send current data
 }

 /*----------------------------
 Software delay function
 ----------------------------*/
 void Delay(WORD n)
 {
     WORD x;

     while (n--)
     {
         x = ;
         while (x--);
     }
 }

 //******************************************************************************

 void main()
 {   int x,y,z;
     float Q,T,K,Roll,Pitch;
     InitUart();                     //Init UART, use to show ADC result
     InitADC();                      //Init ADC sfr
     while ()
     {
         x=GetADCResult();
         y=GetADCResult();
         z=GetADCResult();
         // 0-5v 对应 0-1024
         // 3.3v/2  = 1.65v（0g时候值）
         // 1.65v ->= 338   (AD值即0X0152)
         x-=0X0152; //
         y-=0X0152;
         z-=0X0152;
     Q=x;
     T=y;
     K=z;
     Q=-Q;
     Roll=(float)(((atan2(K,Q)*)/3.14159265)+);
     Pitch=(float)(((atan2(K,T)*)/3.14159265)+);
     conversion(Roll);    //横滚角0-360度
   //conversion(Pitch); //俯仰角0-360度
     SendData(bai);
     SendData(shi);
     SendData(ge);

     SendData(0x0d);
     SendData(0x0a);//换行，回车

     Delay();
     }
 }