TM1638数码管电路原理图如下：
单片机源程序如下:
- #include <REGX51.H>
- #include <tm1638.h>
- unsigned char num[8]; //各个数码管显示的值
- int main(void)
- {
- unsigned char i;
- init_TM1638(); //初始化TM1638
- for(i=0;i<8;i++)
- Write_DATA(i<<1,tab[0]); //初始化寄存器
-
- while(1)
- {
- i=Read_key(); //读按键值
- if(i<8)
- {
- num[i]++;
- while(Read_key()==i); //等待按键释放
- if(num[i]>15)
- num[i]=0;
- Write_DATA(i*2,tab[num[i]]);
- Write_allLED(1<<i);
- }
- }
- }
arduino源程序：
- #define DATA_COMMAND 0X40
- #define DISP_COMMAND 0x80
- #define ADDR_COMMAND 0XC0
- //TM1638模块引脚定义
- int DIO = 2;
- int CLK = 1;
- int STB = 0; //这里定义了那三个脚
- //共阴数码管显示代码
- unsigned char tab[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,
- 0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71};
- unsigned char num[8]; //各个数码管显示的值
- void setup ()
- {
- pinMode(STB,OUTPUT);
- pinMode(CLK,OUTPUT);
- pinMode(DIO,OUTPUT); //让三个脚都是输出状态
- }
- void loop()
- {
- unsigned char i;
- init_TM1638(); //初始化TM1638
- for(i=0;i<8;i++)
- Write_DATA(i<<1,tab[0]); //初始化寄存器
- while(1)
- {
- i=Read_key(); //读按键值
- if(i<8)
- {
- num[i]++;
- while(i==Read_key()); //等待按键释放
- if(num[i]>15)
- num[i]=0;
- Write_DATA(i*2,tab[num[i]]);
- Write_allLED(1<<i);
- }
- }
- }
- void TM1638_Write(unsigned char DATA) //写数据函数
- {
- unsigned char i;
- pinMode(DIO,OUTPUT);
- for(i=0;i<8;i++)
- {
- digitalWrite(CLK,LOW);
- if(DATA&0X01)
- digitalWrite(DIO,HIGH);
- else
- digitalWrite(DIO,LOW);
- DATA>>=1;
- digitalWrite(CLK,HIGH);
- }
- }
- unsigned char TM1638_Read(void) //读数据函数
- {
- unsigned char i;
- unsigned char temp=0;;
- pinMode(DIO,INPUT);//设置为输入
- for(i=0;i<8;i++)
- {
- temp>>=1;
- digitalWrite(CLK,LOW);
- if(digitalRead(DIO)==HIGH)
- temp|=0x80;
- digitalWrite(CLK,HIGH);
-
- }
- return temp;
- }
- void Write_COM(unsigned char cmd) //发送命令字
- {
- digitalWrite(STB,LOW);
- TM1638_Write(cmd);
- digitalWrite(STB,HIGH);
- }
- unsigned char Read_key(void)
- {
- unsigned char c[4],i,key_value=0;
- digitalWrite(STB,LOW);
- TM1638_Write(0x42); //读键扫数据 命令
- for(i=0;i<4;i++)
- {
- c[i]=TM1638_Read();
- }
- digitalWrite(STB,HIGH); //4个字节数据合成一个字节
- for(i=0;i<4;i++)
- {
- key_value|=c[i]<<i;
- }
- for(i=0;i<8;i++)
- {
- if((0x01<<i)==key_value)
- break;
- }
- return i;
- }
- void Write_DATA(unsigned char add,unsigned char DATA) //指定地址写入数据
- {
- Write_COM(0x44);
- digitalWrite(STB,LOW);
- TM1638_Write(0xc0|add);
- TM1638_Write(DATA);
- digitalWrite(STB,HIGH);
- }
- void Write_allLED(unsigned char LED_flag) //控制全部LED函数，LED_flag表示各个LED状态
- {
- unsigned char i;
- for(i=0;i<8;i++)
- {
- if(LED_flag&(1<<i))
- Write_DATA(2*i+1,1);
- else
- Write_DATA(2*i+1,0);
- }
- }
- //TM1638初始化函数
- void init_TM1638(void)
- {
- unsigned char i;
- Write_COM(0x8b); //亮度 (0x88-0x8f)8级亮度可调
- Write_COM(0x40); //采用地址自动加1
- digitalWrite(STB,LOW); //
- TM1638_Write(0xc0); //设置起始地址
- for(i=0;i<16;i++) //传送16个字节的数据
- TM1638_Write(0x00);
- digitalWrite(STB,HIGH);
- }
所有资料51hei提供下载:
TM1638 按键数码管LED显示模块（8位数码管LED按键) 显示模块.zip
(961.32 KB, 下载次数: 199)
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