adc.lst

宏晶单片机的AD演示程序

C51 COMPILER V8.02   ADC                                                                   07/05/2010 14:30:22 PAGE 1   


C51 COMPILER V8.02, COMPILATION OF MODULE ADC
OBJECT MODULE PLACED IN ADC.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE ADC.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          /*------------------------------------------------------------------*/
   2          /* --- STC MCU International Limited -------------------------------*/
   3          /* --- STC 1T Series MCU A/D Conversion Demo -----------------------*/
   4          /* --- Mobile: [phone] -------------------------------------*/
   5          /* --- Fax: [phone] ----------------------------------------*/
   6          /* --- Tel: [phone] ----------------------------------------*/
   7          /* --- Web: www.STCMCU.com -----------------------------------------*/
   8          /* If you want to use the program or the program referenced in the  */
   9          /* article, please specify in which data and procedures from STC    */
  10          /*------------------------------------------------------------------*/
  11          
  12          #include "reg51.h"
  13          #include "intrins.h"
  14          
  15          #define FOSC    18432000L
  16          #define BAUD    9600
  17          
  18          typedef unsigned char BYTE;
  19          typedef unsigned int WORD;
  20          
  21          /*Declare SFR associated with the ADC */
  22          sfr ADC_CONTR   =   0xBC;           //ADC control register
  23          sfr ADC_RES     =   0xBD;           //ADC high 8-bit result register
  24          sfr ADC_LOW2    =   0xBE;           //ADC low 2-bit result register
  25          sfr P1ASF       =   0x9D;           //P1 secondary function control register
  26          
  27          /*Define ADC operation const for ADC_CONTR*/
  28          #define ADC_POWER   0x80            //ADC power control bit
  29          #define ADC_FLAG    0x10            //ADC complete flag
  30          #define ADC_START   0x08            //ADC start control bit
  31          #define ADC_SPEEDLL 0x00            //420 clocks
  32          #define ADC_SPEEDL  0x20            //280 clocks
  33          #define ADC_SPEEDH  0x40            //140 clocks
  34          #define ADC_SPEEDHH 0x60            //70 clocks
  35          
  36          void InitUart();
  37          void InitADC();
  38          void SendData(BYTE dat);
  39          BYTE GetADCResult(BYTE ch);
  40          void Delay(WORD n);
  41          void ShowResult(BYTE ch);
  42          
  43          void main()
  44          {
  45   1          InitUart();                     //Init UART, use to show ADC result
  46   1          InitADC();                      //Init ADC sfr
  47   1          while (1)
  48   1          {
  49   2              ShowResult(0);              //Show Channel0
  50   2              ShowResult(1);              //Show Channel1
  51   2              ShowResult(2);              //Show Channel2
  52   2              ShowResult(3);              //Show Channel3
  53   2              ShowResult(4);              //Show Channel4
  54   2              ShowResult(5);              //Show Channel5
  55   2              ShowResult(6);              //Show Channel6
C51 COMPILER V8.02   ADC                                                                   07/05/2010 14:30:22 PAGE 2   

  56   2              ShowResult(7);              //Show Channel7
  57   2          }
  58   1      }
  59          
  60          /*----------------------------
  61          Send ADC result to UART
  62          ----------------------------*/
  63          void ShowResult(BYTE ch)
  64          {
  65   1          SendData(ch);                   //Show Channel NO.
  66   1          SendData(GetADCResult(ch));     //Show ADC high 8-bit result
  67   1      
  68   1      //if you want show 10-bit result, uncomment next line
  69   1      //    SendData(ADC_LOW2);             //Show ADC low 2-bit result
  70   1      }
  71          
  72          /*----------------------------
  73          Get ADC result
  74          ----------------------------*/
  75          BYTE GetADCResult(BYTE ch)
  76          {
  77   1          ADC_CONTR = ADC_POWER | ADC_SPEEDLL | ch | ADC_START;
  78   1          _nop_();                        //Must wait before inquiry
  79   1          _nop_();
  80   1          _nop_();
  81   1          _nop_();
  82   1          while (!(ADC_CONTR & ADC_FLAG));//Wait complete flag
  83   1          ADC_CONTR &= ~ADC_FLAG;         //Close ADC
  84   1      
  85   1          return ADC_RES;                 //Return ADC result
  86   1      }
  87          
  88          /*----------------------------
  89          Initial UART
  90          ----------------------------*/
  91          void InitUart()
  92          {
  93   1          SCON = 0x5a;                    //8 bit data ,no parity bit
  94   1          TMOD = 0x20;                    //T1 as 8-bit auto reload
  95   1          TH1 = TL1 = -(FOSC/12/32/BAUD); //Set Uart baudrate
  96   1          TR1 = 1;                        //T1 start running
  97   1      }
  98          
  99          /*----------------------------
 100          Initial ADC sfr
 101          ----------------------------*/
 102          void InitADC()
 103          {
 104   1          P1ASF = 0xff;                   //Open 8 channels ADC function
 105   1          ADC_RES = 0;                    //Clear previous result
 106   1          ADC_CONTR = ADC_POWER | ADC_SPEEDLL;
 107   1          Delay(2);                       //ADC power-on and delay
 108   1      }
 109          
 110          /*----------------------------
 111          Send one byte data to PC
 112          Input: dat (UART data)
 113          Output:-
 114          ----------------------------*/
 115          void SendData(BYTE dat)
 116          {
 117   1          while (!TI);                    //Wait for the previous data is sent
C51 COMPILER V8.02   ADC                                                                   07/05/2010 14:30:22 PAGE 3   

 118   1          TI = 0;                         //Clear TI flag
 119   1          SBUF = dat;                     //Send current data
 120   1      }
 121          
 122          /*----------------------------
 123          Software delay function
 124          ----------------------------*/
 125          void Delay(WORD n)
 126          {
 127   1          WORD x;
 128   1      
 129   1          while (n--)
 130   1          {
 131   2              x = 5000;
 132   2              while (x--);
 133   2          }
 134   1      }
 135          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    146    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       1
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)