查看(SKU: RB-05L021)四位七段數(shù)碼管的源代碼

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==產(chǎn)品概述==
此產(chǎn)品由一個12管腳的4位7段共陽極數(shù)碼管和一個控制芯片TM1637構(gòu)成。該模塊采用沉金工藝，外觀更加美觀，同時采用防插反接口，操作更加安全，插口一邊有大寫字母I表示該模塊采用IIC協(xié)議通信，另一邊是數(shù)碼管的圖標(biāo)標(biāo)志。此產(chǎn)品可以應(yīng)用在時間顯示，跑表顯示以及其他需要顯示數(shù)字的設(shè)備上。
==規(guī)格參數(shù)==
# 工作電壓 ： +5v
# 尺寸大小：45mm x 25mm
# 重量大?。?g
# 通信協(xié)議：IIC
==接口定義==
* SCL：IIC時鐘信號引腳
* SDA：IIC數(shù)據(jù)信號引腳
* -：電源地
* +：電源正極

==使用方法==
===連接示意圖===
[[文件:RB-05L021.png|700px|縮略圖|居中]]
SCK引腳接到控制器的A5口, SDA引腳接到控制器的A4口。+和-分別接到電源的+5V和GND。
===例子程序===
<pre style='color:blue'>
#include <TimerOne.h>
#include "TM1637.h"
#define ON 1
#define OFF 0
int8_t TimeDisp[] = {0x00,0x00,0x00,0x00};
unsigned char ClockPoint = 1;
unsigned char Update;
unsigned char halfsecond = 0;
unsigned char second;
unsigned char minute = 0;
unsigned char hour = 12;
#define CLK A5//pins definitions for TM1637 and can be changed to other ports    
#define DIO A4
TM1637 tm1637(CLK,DIO);
void setup()
{
  tm1637.set();
  tm1637.init();
  Timer1.initialize(500000);//timing for 500ms
  Timer1.attachInterrupt(TimingISR);//declare the interrupt serve routine:TimingISR  
}
void loop()
{
  if(Update == ON)
  {
    TimeUpdate();
    tm1637.display(TimeDisp);
  }
  
}
void TimingISR()
{
  halfsecond ++;
  Update = ON;
  if(halfsecond == 2){
    second ++;
    if(second == 60)
    {
      minute ++;
      if(minute == 60)
      {
        hour ++;
        if(hour == 24)hour = 0;
        minute = 0;
      }
      second = 0;
    }
    halfsecond = 0;  
  }
 // Serial.println(second);
  ClockPoint = (~ClockPoint) & 0x01;
}
void TimeUpdate(void)
{
  if(ClockPoint)tm1637.point(POINT_ON);
  else tm1637.point(POINT_OFF); 
  TimeDisp[0] = hour / 10;
  TimeDisp[1] = hour % 10;
  TimeDisp[2] = minute / 10;
  TimeDisp[3] = minute % 10;
  Update = OFF;
}</pre>

===程序效果===
注意程序中包含的頭文件需要下載，程序下載進(jìn)去之后就可以正常顯示時鐘了。
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==產(chǎn)品相關(guān)推薦==
[[文件:erweimaled.png|230px|無框|右]]
===產(chǎn)品購買地址===
[http://lifestyle201.com/goods-139.html 四位七段數(shù)碼管 ]<br/>

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===相關(guān)問題解答===
===相關(guān)學(xué)習(xí)資料===
[http://www.makerspace.cn/forum.php?mod=viewthread&tid=5510&highlight=%E6%9D%A1%E5%BD%A2 Arduino 條形LED模塊測評]<br/>
[http://http://www.makerspace.cn/forum.php?mod=forumdisplay&fid=77 奧松機(jī)器人技術(shù)論壇]<br/>