STC89C52单片机+老王4位数码管AIP1637程序分享 -

#include <intrins.h>
#include <TM1637.H>
void main()
{
TM1637_init();
TM1637_show_digit(0, 1, 0);
TM1637_show_digit(1, 2, 1);
TM1637_show_digit(2, 3, 0);
TM1637_show_digit(3, 4, 0);
while(1)
{
}
}

复制代码

#include <TM1637.H>
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 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();
}
/**
* @brief 显示数据
* @param 地址值 addr: 0 - 5
* @param 数据
* @param
* @retval None
*/
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();
}
void TM1637_show_digit(unsigned char pos, unsigned char digit, bit with_dot)
{
TM1637_write_display_byte(pos, TM1637_SEG_TAB[digit] | (with_dot ? 0x80 : 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);
}
for(i=0; i<6; i++)
{
TM1637_write_display_byte(i, 0x00);
}
}

复制代码

#ifndef __TM1637_H__
#define __TM1637_H__
#include"reg52.h"
#include"intrins.h"
sbit I2C_SCL = P2^0; //定义模拟IIC总线的时钟线
sbit I2C_SDA = P2^1; //定义模拟IIC总线的数据线
#define TM1637_BRIGHTNESS 4 // 0 - 7 亮度
void TM1637_show_digit(unsigned char pos, unsigned char digit, bit with_dot);
void TM1637_init();
#endif

复制代码