13_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

#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

#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

#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

#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;

}

}

}

}

运行效果