LED点阵屏

介绍

显示原理

原理图

74HC595

C51的sfr,sbit

选择列来显示矩阵LED

main.c

#include <REGX52.H>
#inlcude "Delay.h"

sbit mRCLK=P3^5; //RCLK
sbit mSRCLK=P3^6; //SRCLK
sbit mSER=P3^4; //SER


void _74HC595_WriteByte(unsigned char Byte)
{
	unsigned char i;
	mSRCLK=0;
	mRCLK=0;
	for(i=0;i<8;i++)
	{
		mSER=Byte&(0x80>>i); //sbit非0置1
		mSRCLK=1;
		mSRCLK=0;
	}
	mRCLK=1;
}

void MatrixLED_ShowColumn(unsigned char Column, Data)
{
	_74HC595_WriteByte(Data);
	P0=~(0x80>>Column);
}

void main()
{
	MatrixLED_ShowColumn(7,0xF0);
	while(1)
	{
		
	}
}

运行效果

矩阵LED显示笑脸

main.c

#include <REGX52.H>
#include "Delay.h"

sbit mRCLK=P3^5; //RCLK
sbit mSRCLK=P3^6; //SRCLK
sbit mSER=P3^4; //SER

#define MATRIX_LED_PORT P0

/**
  * @brief 74HC595写入一个字节
  * @param 要写入的字节
  * @retval 无
  */
void _74HC595_WriteByte(unsigned char Byte)
{
	unsigned char i;
	mSRCLK=0;
	mRCLK=0;
	for(i=0;i<8;i++)
	{
		mSER=Byte&(0x80>>i); //sbit非0置1
		mSRCLK=1;
		mSRCLK=0;
	}
	mRCLK=1;
}

/**
  * @brief LED点阵屏显示一列数据
  * @param Column 要选择的列, 范围: 0~7, 0在最左边
* @param Data 选择列显示的数据, 高位在上, 1为亮,0为灭
  * @retval 无
  */
void MatrixLED_ShowColumn(unsigned char Column, Data)
{
	_74HC595_WriteByte(Data);
	MATRIX_LED_PORT=~(0x80>>Column);
	Delay(1);
	MATRIX_LED_PORT=0xFF;
}

void main()
{
	while(1)
	{
		MatrixLED_ShowColumn(0,0x3C);
		MatrixLED_ShowColumn(1,0x42);
		MatrixLED_ShowColumn(2,0xA9);
		MatrixLED_ShowColumn(3,0x85);
		MatrixLED_ShowColumn(4,0x85);
		MatrixLED_ShowColumn(5,0xA9);
		MatrixLED_ShowColumn(6,0x42);
		MatrixLED_ShowColumn(7,0x3C);
	}
}

运行效果

矩阵LED显示流动字幕

MatrixLED.c

#include <REGX52.H>
#include "Delay.h"

sbit mRCLK=P3^5; //RCLK
sbit mSRCLK=P3^6; //SRCLK
sbit mSER=P3^4; //SER

#define MATRIX_LED_PORT P0

/**
  * @brief 74HC595写入一个字节
  * @param 要写入的字节
  * @retval 无
  */
void _74HC595_WriteByte(unsigned char Byte)
{
	unsigned char i;
	mSRCLK=0;
	mRCLK=0;
	for(i=0;i<8;i++)
	{
		mSER=Byte&(0x80>>i); //sbit非0置1
		mSRCLK=1;
		mSRCLK=0;
	}
	mRCLK=1;
}

/**
  * @brief LED点阵屏显示一列数据
  * @param Column 要选择的列, 范围: 0~7, 0在最左边
* @param Data 选择列显示的数据, 高位在上, 1为亮,0为灭
  * @retval 无
  */
void MatrixLED_ShowColumn(unsigned char Column, Data)
{
	_74HC595_WriteByte(Data);
	MATRIX_LED_PORT=~(0x80>>Column);
	Delay(1);
	MATRIX_LED_PORT=0xFF;
}

MatrixLED.h

#ifndef __MATRIX_LED_H__
#define __MATRIX_LED_H__

void _74HC595_WriteByte(unsigned char Byte);
void MatrixLED_ShowColumn(unsigned char Column, Data);

#endif

main.c

#include <REGX52.H>
#include "MatrixLED.h"

unsigned char code Animation[]={ //放入Flash不占用内存,但是只读
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0xFF,0x08,0x08,0xFF,0x00,0x0E,0x15,0x15,0x0D,0x00,0xFE,0x01,0x02,0x00,0xFE,0x01,
0x02,0x00,0x0E,0x11,0x11,0x0E,0x00,0x7D,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

void main()
{
	unsigned char i,Offset=0,Count=0;
	while(1)
	{
		for(i=0;i<8;i++)
		{
			MatrixLED_ShowColumn(i,Animation[i+Offset]);
		}
		Count++;
		if(Count>10)
		{
			Count=0;
			Offset++;
			if(Offset>32)
			{
				Offset=0;
			}
		}
	}
}