7279.lst

这是一个ha7279键盘显示的C语言源程序

C51 COMPILER V7.06   7279                                                                  01/24/2005 10:04:57 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE 7279
OBJECT MODULE PLACED IN 7279.OBJ
COMPILER INVOKED BY: c:\KEIL\C51\BIN\C51.exe 7279.c DB OE

stmt level    source

   1          #include "c8051f020.h"                
   2          #include <intrins.h>
   3          
   4          sbit    HD7279_DAT=P1^7;
   5          sbit    HD7279_CLK=P1^6;
   6          
   7          #define NOSELECT7279    P5 |= 0x80              //SPICS4(P57)=1
   8          #define SELECT7279      P5 &= ~(0x80)   //SPICS4(P57)=0;
   9          #define Set7279DAT      HD7279_DAT=1
  10          #define Clr7279DAT      HD7279_DAT=0
  11          #define Set7279CLK      HD7279_CLK=1
  12          #define Clr7279CLK      HD7279_CLK=0
  13           
  14          void SYSCLK_Init (void);             //初始化时钟
  15          void Delay1us(unsigned char T);
  16          void Delay1ms(unsigned char T);
  17          void Delay1s(unsigned char T);
  18          void Timer0_Init (void);             //初始化定时器
  19          void PORT_Init (void);               //初始化IO口
  20          void SPI0_Init (void);               //初始化SPI0
  21          void Send7279Byte(unsigned char ch);
  22          void Test7279(bit LoopFlag);
  23          
  24          
  25          void main (void) 
  26          {
  27   1              WDTCN = 0xde;
  28   1              WDTCN = 0xad;           //关看门狗
  29   1              SYSCLK_Init ();         //初始化时钟
  30   1              Timer0_Init();                  //初始化定时器
  31   1              PORT_Init ();           //初始化IO口
  32   1      //      SPI0_Init ();           //初始化SPI0
  33   1              CPT1CN |= 0x80;                 //使能比较器1
  34   1          REF0CN = 0x03;              //使能片内参考电压
  35   1              EA=1;                                   //开中断
  36   1              Test7279(1);
  37   1      }
  38          
  39          
  40          void SYSCLK_Init (void)  
  41          {
  42   1         int i;                              // delay counter
  43   1         OSCXCN = 0x67;                      // start external oscillator with
  44   1                                             // 18.432MHz crystal
  45   1         for (i=0; i < 256; i++) ;           // Wait for osc. to start up
  46   1         //while (!(OSCXCN & 0x80)) ;        // Wait for crystal osc. to settle
  47   1         OSCICN = 0x88;                      // select external oscillator as SYSCLK
  48   1                                             // source and enable missing clock
  49   1                                             // detector
  50   1      //      OSCICN = 0x07;   //interal 16MHZ
  51   1      }
  52          
  53                                     
  54          void PORT_Init (void)                  // 初始化IO口
  55          {   
C51 COMPILER V7.06   7279                                                                  01/24/2005 10:04:57 PAGE 2   

  56   1         XBR0    = 0x07;                     // Enable SMBus, SPI0, and UART0
  57   1         XBR1    = 0x00;
  58   1         XBR2    = 0x44;                     // Enable crossbar and weak pull-ups
  59   1         //EMI0TC  = 0x21;
  60   1         //P74OUT  = 0xFF;                                      
  61   1         //P0MDOUT = 0x15;
  62   1         //P1MDOUT |= 0x3C;                                   //P1.2-P1.5推挽输出
  63   1         //P1 &= 0xc3;                                                //P1.2-P1.5=0
  64   1      }
  65          
  66          void SPI0_Init (void)                  //初始化SPI0
  67          {
  68   1         SPI0CFG = 0x07;                     // data sampled on 1st SCK rising edge
  69   1                                             // 8-bit data words
  70   1         SPI0CFG|=0xC0;                          //CKPOL =1;
  71   1      
  72   1         SPI0CN = 0x03;                      // Master mode; SPI enabled; flags
  73   1                                             // cleared
  74   1         SPI0CKR = SYSCLK/2/8000000-1;       // SPI clock <= 8MHz (limited by 
  75   1                                             // EEPROM spec.)
  76   1      }
  77          
  78          unsigned char Count1ms;
  79          void Timer0_Init (void)                //定时器0初始化,定时1ms
  80          {
  81   1              CKCON|=0x8;
  82   1              TMOD|=0x1;                         //定时器0方式1,16Bit
  83   1              Count1ms=10;
  84   1              TR0 = 0;                           // STOP Timer0
  85   1              TH0 = (-SYSCLK/1000) >> 8;         // set Timer0 to overflow in 1ms
  86   1              TL0 = -SYSCLK/1000;
  87   1              TR0 = 1;                               // START Timer0
  88   1              IE|= 0x2; 
  89   1      }
  90          
  91          void Timer0_ISR (void) interrupt 1     // 定时器0中断服务程序
  92          {
  93   1              TH0 = (-SYSCLK/1000) >> 8;  
  94   1              TL0 = -SYSCLK/1000;
  95   1              if (Count1ms) Count1ms--;
  96   1      }
  97          
  98          
  99          
 100          void Send7279Byte(unsigned char ch)
 101          {       
 102   1              char i;
 103   1              SELECT7279;             //置CS低电平 
 104   1              Delay1us(50);           //延时50μ
 105   1              
 106   1              for (i=0;i<8;i++)
 107   1              {       
 108   2                      if (ch&0x80)    //输出7位到HD7279A的DATA端 
 109   2                      {
 110   3                              Set7279DAT;
 111   3                      }
 112   2                      else
 113   2                      {
 114   3                              Clr7279DAT;
 115   3                      }
 116   2                      Set7279CLK;             //置CLK高电平 
 117   2                      ch=ch<<1;               //待发数据左移 
C51 COMPILER V7.06   7279                                                                  01/24/2005 10:04:57 PAGE 3   

 118   2                      Delay1us(8);    //延时8μ
 119   2                      Clr7279CLK;             //置CLK低电平 
 120   2                      Delay1us(8);    //延时50μ
 121   2              }
 122   1              Clr7279DAT;                     //发送完毕，DATA端置低，返回 
 123   1      }
 124          unsigned char Receive7279Byte(void)
 125          {
 126   1              unsigned char i,ch;
 127   1              ch=0;           
 128   1              Set7279DAT;                     //DATA端置为高电平，输入状态
 129   1              Delay1us(50);           //延时50μ
 130   1              for (i=0;i<8;i++)
 131   1              {
 132   2                      Set7279CLK;             //置CLK高电平
 133   2                      Delay1us(8);    //延时8μ
 134   2                      ch=ch<<1;               //接收数据左移1位
 135   2                      if (HD7279_DAT)
 136   2                              ch+=1;          //接收1位数据
 137   2                      Clr7279CLK;             //置CLK低电平
 138   2                      Delay1us(8);    //延时8μ
 139   2              }                   
 140   1              Clr7279DAT;                     //接收完毕，DATA端重新置成低电平(输出状态)
 141   1              return ch;
 142   1      }
 143                                  
 144          void FlashLED(unsigned char No)
 145          {
 146   1              char i;
 147   1              Send7279Byte(0x88);     //发闪烁指令 
 148   1              i=0x1;
 149   1              while (No)
 150   1              {
 151   2                      i=i<<1;
 152   2                      No--;
 153   2              }                                                                                                        
 154   1              Send7279Byte(~i);   //1闪烁
 155   1              NOSELECT7279;           //置CS高电平 
 156   1      }
 157          
 158          /*
 159          void BlankLED(unsigned char ch)
 160          {
 161                  Send7279Byte(0x98);     //发消隐指令 
 162                  Send7279Byte(ch);   //1-显示 0-消隐