利用单片机和TMS3450数字钟双阴极LED屏幕制作电子钟|创意DIY

单片机制作数字钟坛里示例很多，没必要发程序代码了，但是单片机驱动双阴极LED屏幕，我找了半天也没有找到，只得自己写了一个，现在分享出来，请大家指教。
TMS3450数字钟的LED屏幕同普通数码管区别很大，是双阴极LED屏幕，共四个数码管，还有冒号、上午、下午等标志，例如小时的两个数码管共用6-12脚，分钟的两个数码管共用13-19脚，采用双阴极动态扫描，上午、冒号由阴极K1负责，如下图所示，下面是驱动代码：

图片:108_1822464_581fad5043e122b.jpg

#include

sbit LED4B2K_K1_PIN = P3^6;
sbit LED4B2K_K2_PIN = P3^7;

#define LED4B2K_SetHourSeg(dat)   P1 = dat
#define LED4B2K_SetMinuteSeg(dat) P2 = dat
#define LED4B2K_EnableK1() { LED4B2K_K2_PIN = 0; LED4B2K_K1_PIN = 1; }
#define LED4B2K_EnableK2() { LED4B2K_K1_PIN = 0; LED4B2K_K2_PIN = 1; }

//小时高位为0时消隐显示，将原本显示数字0的小时高位共阴1的0x06和共阴2的0x0D码表都改为0
code unsigned char DispCode11[10] = {0x00,0x00,0x06,0x06,0x00,0x06,0x06,0x02,0x06,0x06}; //小时高位共阴1
code unsigned char DispCode12[10] = {0x00,0x09,0x07,0x0B,0x0B,0x0A,0x0E,0x09,0x0F,0x0B}; //小时高位共阴2
code unsigned char DispCode21[10] = {0x68,0x00,0x38,0x30,0x50,0x70,0x78,0x00,0x78,0x70}; //小时低位共阴1
code unsigned char DispCode22[10] = {0x70,0x30,0x50,0x70,0x30,0x60,0x60,0x70,0x70,0x70}; //小时低位共阴2
code unsigned char DispCode31[10] = {0x07,0x06,0x03,0x07,0x06,0x05,0x05,0x07,0x07,0x07}; //分钟高位共阴1
code unsigned char DispCode32[10] = {0x0D,0x00,0x0E,0x06,0x03,0x07,0x0F,0x00,0x0F,0x07}; //分钟高位共阴2
code unsigned char DispCode41[10] = {0x68,0x00,0x38,0x30,0x50,0x70,0x78,0x00,0x78,0x70}; //分钟低位共阴1
code unsigned char DispCode42[10] = {0x70,0x30,0x50,0x70,0x30,0x60,0x60,0x70,0x70,0x70}; //分钟低位共阴2

void Display(unsigned char hour, unsigned char minute, unsigned char isSecond, unsigned char isFirst)
{
  unsigned char hour1, hour2, minute1, minute2, seghour1, seghour2, segminute1, segminute2;

  hour1 = hour >> 4;
  hour2 = hour & 0x0F;
  minute1 = minute >> 4;
  minute2 = minute & 0x0F;

  seghour1 = DispCode11[hour1] | DispCode21[hour2];
  seghour2 = DispCode12[hour1] | DispCode22[hour2];
  segminute1 = DispCode31[minute1] | DispCode41[minute2];
  segminute2 = DispCode32[minute1] | DispCode42[minute2];
  if(isSecond) segminute1 |= 0x80;

  if(isFirst)
  {
    LED4B2K_SetHourSeg(seghour1);
    LED4B2K_SetMinuteSeg(segminute1);
    LED4B2K_EnableK1();
  }
  else
  {
    LED4B2K_SetHourSeg(seghour2);
    LED4B2K_SetMinuteSeg(segminute2);
    LED4B2K_EnableK2();
  }
}


#define Delay10ms() { unsigned int iDelay = 1250; while(--iDelay); }

void main(void)
{
  bit isFirst = 1, isSecond = 0;
  unsigned char hour = 0x12;
  unsigned char minute = 0x34;
  unsigned char count = 0;

  while(1)
  {
    if(++count == 50) //秒闪烁
    {
      count = 0;
      isSecond = !isSecond;
    }

    isFirst = !isFirst; //分别扫描K1和K2
    Display(hour, minute, isSecond, isFirst);
    Delay10ms();
  }
}

[ 此帖被mengfc在2015-03-10 11:52重新编辑 ]