查看“数码管”的源代码

[[文件:数码管-01.png|350px|缩略图|右]]
== 概述 ==
4位7段LED数码管显示，可显示整形数字

== 技术参数 ==
* 工作电压：VCC 3.3-5V
* 接口方式：I2C接口
* 模块尺寸：24x46x7.5mm

== 引脚定义 ==
{| class="wikitable"
|-
| <small>VCC</small> || <small>电源</small>
|-
| <small>SDA</small> || <small>I2C数据</small>
|-
| <small>SCL</small> || <small>I2C时钟</small>
|-
| <small>GND</small> || <small>地</small>
|}

== 使用教程 ==
=== Arduino示例 ===
<pre style="color:blue">
//程序功能：数码管每秒显示8.8.8.8. 0.5S//
#include <Wire.h>
#include <TM1650.h>
#include <Arduino.h>
TM1650 d;
char line[] = {"8888"};
void setup()
{
  Wire.begin();        
  d.init();  //数码管初始化
  d.displayOff(); //关闭显示
  d.displayString(line);  //输入显示字符
  d.setBrightness(2);  //设定显示亮度
  for(int i=0; i<4; i++) d.setDot(i, true);  //显示小数点
  Serial.begin(9600);
}

void loop()
{
  d.displayOn();  //显示信息
  delay(500);
  d.displayOff(); //关闭显示  
  delay(500);
  Serial.print(1);
}
</pre>

=== MicroPython示例 ===
==== 连接示意图 ====
[[文件:数码管连接.jpg|800px|居中]]
<pre style="color:blue">
from microbit import *

_TubeTab = [
    0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 
    0x6F, 0x77, 0x7C, 0x39, 0x5E, 0x79, 0x71, 0x00, 0x40]

def tm1650Init():
  i2c.write(0x24, bytearray([0x01]))
def tm1650DisplayUint(x):
  charTemp = [0, 0, 0, 0]
  x = (x if x < 10000 else 9999)
  charTemp[3] = x%10
  charTemp[2] = (x//10)%10
  charTemp[1] = (x//100)%10
  charTemp[0] = (x//1000)%10
  if x < 1000:
    charTemp[0] = 0x10
    if x < 100:
      charTemp[1] = 0x10
      if x < 10:
        charTemp[2] = 0x10
  for i in range(0, 4):
    i2c.write(0x34+i, bytearray([_TubeTab[charTemp[i]]]))
def tm1650DisplayInt(x):
  x = round(x)
  if x >= 0:
    tm1650DisplayUint(x)
  else:
    temp = (x if x > -999 else -999)
    temp = abs(temp)
    tm1650DisplayUint(temp)
    if temp < 10:
      i2c.write(0x36, bytearray([_TubeTab[0x11]]))
    elif temp < 100:
      i2c.write(0x35, bytearray([_TubeTab[0x11]]))
    elif temp < 1000:
      i2c.write(0x34, bytearray([_TubeTab[0x11]]))

tm1650Init()

display.off()
while True:
    tm1650DisplayInt(7777)
    sleep(1000)
    tm1650DisplayInt(8888)
    sleep(1000)
    tm1650DisplayInt(9999)
    sleep(1000)
    tm1650DisplayInt(1111)
    sleep(1000)


</pre>

=== 图形化示例 ===