STC51单片机TM1637数码管显示驱动程序

/*
Coder : Farman
Date  : 2018-01-02
参考了厂家的TM1637数据手册，在此表示感谢。
*/
 
 
#include <STC89C5XRC.h>  //包含52单片机头文件
#include "Delay.h"
 
 
sbit I2C_SCL = P2^1;   //定义模拟IIC总线的时钟线
sbit I2C_SDA = P2^0;   //定义模拟IIC总线的数据线
 
#define TM1637_BRIGHTNESS 7 // 0 - 7

void I2C_delay()
{
    nop_();
}
 
 
void I2C_start()
{   
    I2C_SCL = 1; 
    I2C_SDA = 1;
 
 
    I2C_delay();
 
 
    I2C_SDA = 0; // 时钟线设置为常态，低电平。
}
 
 
/*
I2C 总线写1个字节
不包含应答位的检测
*/
void I2C_write_byte(char byte_to_write)
{
    unsigned char i;
 
 
    for(i=0; i<8; i++)
    {
        I2C_SCL = 0;
 
        I2C_SDA = byte_to_write & 0x01;
        I2C_delay();
 
        I2C_SCL = 1;
        I2C_delay();
 
 
        I2C_SCL = 0;
        I2C_delay();
 
 
        byte_to_write >>= 1;
    }
 
    return; 
}
 
 
void I2C_check_ack()
{
    // I2C 检查应答位，实际未检查，只发送了应答位时钟，认为TM1637工作正常
 
 
    I2C_SCL = 0;
    I2C_delay();//在第八个时钟下降沿之后延时5us，开始判断ACK 信号
 
    while(I2C_SDA)
    {
        ;
    }
 
 
    I2C_SCL = 1;
    I2C_delay();
 
 
    I2C_SCL=0;
}
 
 
void I2C_send_ack()
{
    I2C_SDA = 0;
    I2C_delay();
 
 
    I2C_SCL = 1;
    I2C_delay();
 
 
    I2C_SCL = 0;
    I2C_delay();
 
 
    I2C_SDA = 1;
    I2C_delay();
}
 
 
void I2C_stop()
{
    I2C_SCL = 0;
    I2C_delay();
 
 
    I2C_SDA = 0;
    I2C_delay(); 
 
 
    I2C_SCL = 1;
    I2C_delay();
 
 
    I2C_SDA = 1;
}
 
 
///
//
// TM1637模块操作函数
//
//
 
 
void TM1637_write_command_byte(unsigned char command)
{
    I2C_start();
    I2C_write_byte(command);
    I2C_check_ack();
    I2C_stop();
}
 
 
 
 
// bright : 0 - 7
void TM1637_display_switch_and_bright(bit enable_display, unsigned char bright)
{
    TM1637_write_command_byte(0x80 + (enable_display ? 0x08 : 0x00) + bright);
}
 
 
 
 
void TM1637_write_display_bytes(unsigned char first_addr, 
                                unsigned char bytes_to_write[],
                                unsigned char num_of_bytes)
{
    unsigned char i;
 
 
    I2C_start();
    I2C_write_byte(0x40);
    I2C_check_ack();
    I2C_stop();
 
 
    I2C_start();
    I2C_write_byte(0xC0 + first_addr);
    I2C_check_ack();
 
 
    for(i=0; i<num_of_bytes; i++)
    {
        I2C_write_byte(bytes_to_write[i]);
        I2C_check_ack();
    } 
 
 
    I2C_stop();
}
 
 
 
 
// addr: 0 - 5
void TM1637_write_display_byte(unsigned char addr, unsigned char segments)
{
    I2C_start();
    I2C_write_byte(0x40 + addr);
    I2C_check_ack();
    I2C_stop();
 
 
    I2C_start();
    I2C_write_byte(0xC0 + addr);
    I2C_check_ack();
 
 
    I2C_write_byte(segments);
    I2C_check_ack();
 
 
    I2C_stop();
}
 
 
 
 
code unsigned char TM1637_SEG_TAB[] = 
{
     0x3F // 00111111 0
    ,0x06 // 00000110 1
    ,0x5B // 01011011 2
    ,0x4F // 01001111 3
    ,0x66 // 01100110 4
    ,0x6d // 01101101 5
    ,0x7d // 01111101 6
    ,0x07 // 00000111 7
    ,0x7F // 01111111 8
    ,0x6F // 01101111 9
    ,0x77 // 01110111 A
    ,0x7C // 01111100 b
    ,0x39 // 00111001 C
    ,0x5E // 01011110 d
    ,0x79 // 01111001 E 
    ,0x71 // 01110001 F 
};
 
 
void TM1637_show_digit(unsigned char pos, unsigned char digit, bit with_dot)
{
    TM1637_write_display_byte(pos, TM1637_SEG_TAB[digit] | (with_dot ? 0x20 : 0x00));
}
 
 
 
 
void TM1637_init()
{
    unsigned char i;
 
 
    TM1637_display_switch_and_bright(1, TM1637_BRIGHTNESS);
 
 
    for(i=0; i<6; i++)
    {
        TM1637_write_display_byte(i, 0xFF);
    }
 
 
    Delay200ms();
 
 
    for(i=0; i<6; i++)
    {
        TM1637_write_display_byte(i, 0x00);
    }
 
 
    Delay200ms();
 
 
    for(i=0; i<6; i++)
    {
        TM1637_write_display_byte(i, 0xFF);
    }
 
 
    Delay200ms();
 
 
    for(i=0; i<6; i++)
    {
        TM1637_write_display_byte(i, 0x00);
    }
 
 
    Delay200ms(); 
}
 
 
void TM1637()
{
    unsigned char seg;
    unsigned char i, j;
 
 
    TM1637_init();
 
 
    while(1)
    {
        for(i=0; i<16; i++)
        {
            for(j=0; j<6; j++)
            {
                TM1637_show_digit(j, i, 0);
            }
 
 
            Delay1s();
        }
    }
 
}

来源：https://blog.csdn.net/farmanlinuxer/article/details/79008078

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