dac.lst

C51编程

C51 COMPILER V7.05   DAC                                                                   08/28/2005 16:58:27 PAGE 1   


C51 COMPILER V7.05, COMPILATION OF MODULE DAC
OBJECT MODULE PLACED IN dac.OBJ
COMPILER INVOKED BY: C:\SiLabs\MCU\IDEfiles\C51\BIN\C51.exe dac.c DB OE

stmt level    source

   1          #include "c8051f020.h"
   2          //-----------------------------------------------------------------------------
   3          sfr16 DP = 0x82; // data pointer
   4          sfr16 TMR3RL = 0x92; // Timer3 reload value
   5          sfr16 TMR3 = 0x94; // Timer3 counter
   6          sfr16 ADC0 = 0xbe; // ADC0 data
   7          sfr16 ADC0GT = 0xc4; // ADC0 greater than window
   8          sfr16 ADC0LT = 0xc6; // ADC0 less than window
   9          sfr16 RCAP2 = 0xca; // Timer2 capture/reload
  10          sfr16 T2 = 0xcc; // Timer2
  11          sfr16 RCAP4 = 0xe4; // Timer4 capture/reload
  12          sfr16 T4 = 0xf4; // Timer4
  13          sfr16 DAC0 = 0xd2; // DAC0 data
  14          sfr16 DAC1 = 0xd5; // DAC1 data
  15          //-----------------------------------------------------------------------------
  16          // Function PROTOTYPES
  17          //-----------------------------------------------------------------------------
  18          void main (void);
  19          void SYSCLK_Init (void);
  20          void PORT_Init (void);
  21          void UART0_Init (void);
  22          void Timer4_Init (int counts);
  23          void Timer4_ISR (void);
  24          long pow(int x, int y);
  25          void Print_Command_List(void);
  26          void Sine(void);
  27          void Square(void);
  28          void Triangle(void);
  29          void Saw(void);
  30          void Off(void);
  31          void Help(void);
  32          void Error(void);
  33          //-----------------------------------------------------------------------------
  34          // Global CONSTANTS
  35          //-----------------------------------------------------------------------------
  36          #define SYSCLK 22118400 // SYSCLK frequency in Hz
  37          #define BAUDRATE 9600 // Baud rate of UART in bps
  38          #define SAMPLE_RATE_DAC 80000L // DAC sampling rate in Hz
  39          #define PHASE_PRECISION 65536 // range of phase accumulator
  40          #define command_length 2 // command length is 2 characters
  41          #define command_size 3 // command size is 3 bytes
  42          typedef struct Command_Table_Type { // when a command is entered, it is
  43          char command[command_size]; // compared to the command field of
  44          void (*function_ptr)(void); // of the table. If there is a match
  45          }Command_Table_Type; // then the the function located at
  46          // function_ptr will be executed
  47          typedef enum Waveform { // the different possible output
  48          SQUARE, // waveforms
  49          SINE,
  50          TRIANGLE,
  51          SAW,
  52          OFF
  53          }Waveform;
  54          typedef union lng { // access a long variable as two
  55          long Long; // 16-bit integer values
C51 COMPILER V7.05   DAC                                                                   08/28/2005 16:58:27 PAGE 2   

  56          int Int[2];
  57          } lng;
  58          //-----------------------------------------------------------------------------
  59          // Global Variables
  60          //-----------------------------------------------------------------------------
  61          unsigned long frequency = 1000; // frequency of output in Hz,
  62          // defaults to 1000 Hz
  63          unsigned int phase_add = 1000 * PHASE_PRECISION / SAMPLE_RATE_DAC;
  64          unsigned int amplitude = 100 * 655; // 655 is a scaling factor
  65          // see the Timer 4 ISR
  66          Waveform output_waveform = OFF;
  67          char input_str[16]= "";
  68          #define num_commands 6
  69          Command_Table_Type code function_table[num_commands + 1] = {
  70          {"SQ", Square},
  71          {"SI", Sine},
  72          {"TR", Triangle},
  73          {"SA", Saw},
  74          {"OF", Off},
  75          {"??", Help},
  76          {"", Error}
  77          };
  78          // a full cycle, 16-bit, 2’s complement sine wave lookup table
  79          int code SINE_TABLE[256] = {
  80          0x0000, 0x0324, 0x0647, 0x096a, 0x0c8b, 0x0fab, 0x12c8, 0x15e2,
  81          0x18f8, 0x1c0b, 0x1f19, 0x2223, 0x2528, 0x2826, 0x2b1f, 0x2e11,
  82          0x30fb, 0x33de, 0x36ba, 0x398c, 0x3c56, 0x3f17, 0x41ce, 0x447a,
  83          0x471c, 0x49b4, 0x4c3f, 0x4ebf, 0x5133, 0x539b, 0x55f5, 0x5842,
  84          0x5a82, 0x5cb4, 0x5ed7, 0x60ec, 0x62f2, 0x64e8, 0x66cf, 0x68a6,
  85          0x6a6d, 0x6c24, 0x6dca, 0x6f5f, 0x70e2, 0x7255, 0x73b5, 0x7504,
  86          0x7641, 0x776c, 0x7884, 0x798a, 0x7a7d, 0x7b5d, 0x7c29, 0x7ce3,
  87          0x7d8a, 0x7e1d, 0x7e9d, 0x7f09, 0x7f62, 0x7fa7, 0x7fd8, 0x7ff6,
  88          0x7fff, 0x7ff6, 0x7fd8, 0x7fa7, 0x7f62, 0x7f09, 0x7e9d, 0x7e1d,
  89          0x7d8a, 0x7ce3, 0x7c29, 0x7b5d, 0x7a7d, 0x798a, 0x7884, 0x776c,
  90          0x7641, 0x7504, 0x73b5, 0x7255, 0x70e2, 0x6f5f, 0x6dca, 0x6c24,
  91          0x6a6d, 0x68a6, 0x66cf, 0x64e8, 0x62f2, 0x60ec, 0x5ed7, 0x5cb4,
  92          0x5a82, 0x5842, 0x55f5, 0x539b, 0x5133, 0x4ebf, 0x4c3f, 0x49b4,
  93          0x471c, 0x447a, 0x41ce, 0x3f17, 0x3c56, 0x398c, 0x36ba, 0x33de,
  94          0x30fb, 0x2e11, 0x2b1f, 0x2826, 0x2528, 0x2223, 0x1f19, 0x1c0b,
  95          0x18f8, 0x15e2, 0x12c8, 0x0fab, 0x0c8b, 0x096a, 0x0647, 0x0324,
  96          0x0000, 0xfcdc, 0xf9b9, 0xf696, 0xf375, 0xf055, 0xed38, 0xea1e,
  97          0xe708, 0xe3f5, 0xe0e7, 0xdddd, 0xdad8, 0xd7da, 0xd4e1, 0xd1ef,
  98          0xcf05, 0xcc22, 0xc946, 0xc674, 0xc3aa, 0xc0e9, 0xbe32, 0xbb86,
  99          0xb8e4, 0xb64c, 0xb3c1, 0xb141, 0xaecd, 0xac65, 0xaa0b, 0xa7be,
 100          0xa57e, 0xa34c, 0xa129, 0x9f14, 0x9d0e, 0x9b18, 0x9931, 0x975a,
 101          0x9593, 0x93dc, 0x9236, 0x90a1, 0x8f1e, 0x8dab, 0x8c4b, 0x8afc,
 102          0x89bf, 0x8894, 0x877c, 0x8676, 0x8583, 0x84a3, 0x83d7, 0x831d,
 103          0x8276, 0x81e3, 0x8163, 0x80f7, 0x809e, 0x8059, 0x8028, 0x800a,
 104          0x8000, 0x800a, 0x8028, 0x8059, 0x809e, 0x80f7, 0x8163, 0x81e3,
 105          0x8276, 0x831d, 0x83d7, 0x84a3, 0x8583, 0x8676, 0x877c, 0x8894,
 106          0x89bf, 0x8afc, 0x8c4b, 0x8dab, 0x8f1e, 0x90a1, 0x9236, 0x93dc,
 107          0x9593, 0x975a, 0x9931, 0x9b18, 0x9d0e, 0x9f14, 0xa129, 0xa34c,
 108          0xa57e, 0xa7be, 0xaa0b, 0xac65, 0xaecd, 0xb141, 0xb3c1, 0xb64c,
 109          0xb8e4, 0xbb86, 0xbe32, 0xc0e9, 0xc3aa, 0xc674, 0xc946, 0xcc22,
 110          0xcf05, 0xd1ef, 0xd4e1, 0xd7da, 0xdad8, 0xdddd, 0xe0e7, 0xe3f5,
 111          0xe708, 0xea1e, 0xed38, 0xf055, 0xf375, 0xf696, 0xf9b9, 0xfcdc,
 112          };
 113          code char string0[] = "\n\n*** OUTPUT IS NOW A ";
 114          code char string1[] = "\n\n----------------------------------\n\n";
 115          //-----------------------------------------------------------------------------
 116          // MAIN Routine
 117          //-----------------------------------------------------------------------------
C51 COMPILER V7.05   DAC                                                                   08/28/2005 16:58:27 PAGE 3   

 118          void main (void) {
 119   1      char i; // counting variable
 120   1      
 121   1      
 122   1      int printed_amplitude = 100; // a separate copy of amplitude because
 123   1      // temp_amplitude is written over
 124   1      void (*f)(void); // function pointer used to call the proper
 125   1      // function from the command table
 126   1      WDTCN = 0xde; // Disable watchdog timer
 127   1      WDTCN = 0xad;
 128   1      SYSCLK_Init ();
 129   1      PORT_Init ();
 130   1      // initializations for wave generation
 131   1      REF0CN = 0x03; // enable internal VREF generator
 132   1      DAC1CN = 0x97; // enable DAC1 in left-justified mode
 133   1      Timer4_Init(SYSCLK/SAMPLE_RATE_DAC);
 134   1      // using Timer4 as update scheduler
 135   1      // initialize T4 to update DAC1
 136   1      // after (SYSCLK cycles)/sample have
 137   1      // passed.
 138   1      
 139   1      
 140   1      EA = 1; // Enable global interrupts
 141   1      
 142   1      
 143   1      } // end main
*** WARNING C280 IN LINE 119 OF DAC.C: 'i': unreferenced local variable
*** WARNING C280 IN LINE 124 OF DAC.C: 'f': unreferenced local variable
 144          //-----------------------------------------------------------------------------
 145          // Init Routines
 146          //-----------------------------------------------------------------------------
 147          //-----------------------------------------------------------------------------
 148          // SYSCLK_Init
 149          //-----------------------------------------------------------------------------
 150          //
 151          // This routine initializes the system clock to use a 22.1184MHz crystal
 152          // as its clock source.
 153          //
 154          void SYSCLK_Init (void)
 155          {
 156   1      int i; // delay counter
 157   1      OSCXCN = 0x67; // start external oscillator with
 158   1      // 22.1184MHz crystal
 159   1      for (i=0; i < 256; i++) ; // Wait for osc. to start up
 160   1      while (!(OSCXCN & 0x80)) ; // Wait for crystal osc. to settle
 161   1      OSCICN = 0x88; // select external oscillator as SYSCLK
 162   1      // source and enable missing clock
 163   1      // detector
 164   1      }
 165          //-----------------------------------------------------------------------------
 166          // PORT_Init
 167          //-----------------------------------------------------------------------------
 168          //
 169          // Configure the Crossbar and GPIO ports
 170          //
 171          void PORT_Init (void)
 172          {
 173   1      XBR0 = 0x04; // Enable UART0
 174   1      XBR1 = 0x00;
 175   1      XBR2 = 0x40; // Enable crossbar and weak pull-up
 176   1      P0MDOUT |= 0x01; // Set TX0 pin to push-pull
 177   1      }
C51 COMPILER V7.05   DAC                                                                   08/28/2005 16:58:27 PAGE 4   

 178          //-----------------------------------------------------------------------------
 179          // Timer4_Init
 180          //-----------------------------------------------------------------------------
 181          // This routine initializes Timer4 in auto-reload mode to generate interrupts
 182          // at intervals specified in <counts>.
 183          //