RPI-595-IO-Expand Module(English)

Description

The "RPI-595-IO-Expand Module" uses four 74HC595 chips to expand IO ports up to 32.In this case ,this module can solve the problem in Raspberry Pi like enlightening LED matrix,driving the lattice screen ,or in any situation ,that IO port insufficient

Technical Details

Product Scale

schematic

Learn

how to use this 595-IO-Expand Module to enlighten our RGB-LED-Matrix Module RPI-RGB-LED-Matrix?

• just mount the LED Matrix module on 595-IO-Expand module like following picture
• install wiringPi library you can refer from this link http://wiringpi.com/download-and-install/
• After installing wiringPi, type the following code in the console to build a .c file

sudo vim.tiny RGB8x8.c

• Copy and paste the following demo code into RGB8x8.c

• Under the vim.tiny editor, type ":", then type "wq" and press "enter" to save the RGB8x8.c file and exit editor

• Complie it: gcc RGB8x8.c -lwiringPi -o RGB8x8

• Lastly, type sudo ./RGB8x8 -g 0 1,to load the executable file ,and in the matrix board you will find the green LED on line 0,row 1 is turned on as the following photo shows.

示例代码说明

#include "OLEDType_SSD1306.h"  //include driver file
#include "OLED_GFX.h"
#include "OLED_SSD1306.h"

OLED_SSD1306 display;                                                              // instantiation  OLED_SSD1306

const unsigned char rpi_2[128] = { /* 0X00,0X01,0X1A,0X00,0X20,0X00, */           //binary file of picture
0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X07,0XC1,0XF0,0X00,0X18,0X32,0X06,0X00,
0X10,0X0C,0X02,0X00,0X11,0X0C,0X02,0X00,0X10,0X4C,0X84,0X00,0X08,0X2D,0X04,0X00,
0X0C,0X1E,0X08,0X00,0X06,0X3F,0X10,0X00,0X03,0XE1,0XF0,0X00,0X04,0X40,0X18,0X00,
0X08,0XC0,0X88,0X00,0X09,0XFF,0XE4,0X00,0X0F,0X1C,0X34,0X00,0X1E,0X0C,0X1E,0X00,
0X24,0X0C,0X12,0X00,0X24,0X0C,0X01,0X00,0X24,0X0C,0X11,0X00,0X26,0X1E,0X19,0X00
0X2F,0XE1,0XFB,0X00,0X1B,0XC0,0XE6,0X00,0X10,0XC0,0XC6,0X00,0X10,0XC0,0X84,0X00,
0X08,0X40,0X84,0X00,0X08,0X73,0X0C,0X00,0X06,0X7F,0X98,0X00,0X01,0XC0,0XE0,0X00,
0X00,0XC0,0XC0,0X00,0X00,0X33,0X00,0X00,0X00,0X0C,0X00,0X00,0X00,0X00,0X00,0X00,
};

unsigned char rpi_3[128] = { /* 0X00,0X01,0X1A,0X00,0X20,0X00, */               //binary file of picture
0XFF,0XFF,0XFF,0XC0,0XFF,0XFF,0XFF,0XC0,0XF8,0X3E,0X0F,0XC0,0XE7,0XCD,0XF9,0XC0,
0XEF,0XFB,0XFD,0XC0,0XEE,0XF3,0XFD,0XC0,0XEF,0XB3,0X7B,0XC0,0XF7,0XD2,0XFB,0XC0,
0XFF,0XE1,0XFF,0XC0,0XFD,0XC0,0XEF,0XC0,0XFC,0X1E,0X0F,0XC0,0XFB,0XBF,0XE7,0XC0,
0XF7,0X3F,0X77,0XC0,0XF6,0X00,0X1B,0XC0,0XF0,0XE3,0XCB,0XC0,0XE1,0XF3,0XE1,0XC0,
0XDB,0XF7,0XFD,0XC0,0XDB,0XF3,0XFE,0XC0,0XDB,0XF3,0XEE,0XC0,0XD9,0XE1,0XE6,0XC0,
0XD0,0X1E,0X04,0XC0,0XE4,0X3F,0X19,0XC0,0XEF,0X3F,0X39,0XC0,0XFF,0XBF,0X7B,0XC0,
0XF7,0XBF,0X7B,0XC0,0XF7,0X8C,0XF3,0XC0,0XF9,0X80,0X67,0XC0,0XFE,0X3F,0X1F,0XC0,
0XFF,0X3F,0X3F,0XC0,0XFF,0XDC,0XFF,0XC0,0XFF,0XF3,0XFF,0XC0,0XFF,0XFF,0XFF,0XC0,
};

int main(int argc, char **argv)
{
    if ( !display.init(OLED_I2C_RESET,OLED_OLED_I2C_128x32) )       //initiate the I2C interface screen ,otherwise ,exit
        exit(EXIT_FAILURE);
    display.begin();                                                //start display
    display.clearDisplay();                                         //clear screen
    display.drawBitmap(0,0,rpi_2,32,32,1);                          //picture display location X:0,Y:0,picture file :RPI_2,picture high:32,picture with:32,font:black
    display.drawBitmap(96,0,rpi_2,32,32,1);                         //picture display location X:96,Y:0,picture file :RPI_2,picture high:32,picture with:32,font:black
    display.drawRect(0,0,128,32,0);                                 //display white
    display.setTextSize(1);                                         //set font size one
    display.setTextColor(WHITE);                                    //set font color white
    display.setCursor(29,0);                                        //set character display location X:29,:Y:0
    display.print("Hello World");                                   //set display content Hello World
    display.setCursor(29,16);                                       //set ddisplay location X:29,Y:16
    display.print("www.52pi.cn");                                   //set display ccontent www.52pi.cn
    display.display();                                              //start display
        usleep(10000);                                                  //delay

}

购买链接

附件

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