Lesson 30--Microduino 8*8 Lattice Animated Emoticon

Language	English

Objective This tutorial will teach you display a changeing smiling face based on the static one. Equipment Microduino-Core Microduino-FT232R Other hardware equipment Breadboard Jumper one box Breadboard one piece 8*8 lattice one 74HC595 Two USB cable one 8*8 lattice LED is：LD-1088BS, the following is its pin definition： Schematic Pin Table： Lattice ROW Lattice 16pin 74HC595 74HC595 1 13 15 Q0 2 3 1 Q1 3 4 2 Q2 4 10 3 Q3 5 6 4 Q4 6 11 5 Q5 7 15 6 Q6 8 16 7 Q7 Lattice COL Lattice 16pin 74HC595 74HC595 1 5 15 Q0 2 2 1 Q1 3 7 2 Q2 4 1 3 Q3 5 12 4 Q4 6 8 5 Q5 7 14 6 Q6 8 9 7 Q7 Program //Connect to 74HC595的ST_CP int latchPin = 8; //Connect to 74HC595的SH_CP int clockPin = 12; //Connect to 74HC595的DS int dataPin = 11; //Set the timer unsigned long time; //Hide line definition byte masks[8]={ B01111111,B10111111,B11011111,B11101111,B11110111,B11111011,B11111101,B11111110}; //Action definition for smiling face byte rows[2][8]={ { B00111100,B01000010,B10100101,B10000001,B10100101,B10011001,B01000010,B00111100 } , { B00111100,B01000010,B10100101,B10000001,B10111101,B10000001,B01000010,B00111100 } }; void setup() { //Baud rate 9600 Serial.begin(9600); //Set latchpin as output pinMode(latchPin, OUTPUT); } void loop() { //Action change for(int j=0;j<2;j++) { unsigned long startTime = millis(); for (unsigned long elapsed=0; elapsed < 1000; elapsed = millis() - startTime) {//Display 600ms for(int i=0;i<8;i++) { digitalWrite(latchPin, 0); shiftOut(dataPin, clockPin, masks[i]); //mask(col) shiftOut(dataPin, clockPin, rows[j][i]); //row digitalWrite(latchPin, 1); } } //time=0; } } void shiftOut(int myDataPin, int myClockPin, byte myDataOut) { // This shifts 8 bits out MSB first, //on the rising edge of the clock, //clock idles low //internal function setup int i=0; int pinState; pinMode(myClockPin, OUTPUT); pinMode(myDataPin, OUTPUT); //clear everything out just in case to //prepare shift register for bit shifting digitalWrite(myDataPin, 0); digitalWrite(myClockPin, 0); //for each bit in the byte myDataOut&#239;&#191;&#189; //NOTICE THAT WE ARE COUNTING DOWN in our for loop //This means that %00000001 or "1" will go through such //that it will be pin Q0 that lights. for (i=7; i>=0; i--) { digitalWrite(myClockPin, 0); //if the value passed to myDataOut and a bitmask result // true then... so if we are at i=6 and our value is // %11010100 it would the code compares it to %01000000 // and proceeds to set pinState to 1. if ( myDataOut & (1<<i) ) { pinState= 1; } else { pinState= 0; } //Sets the pin to HIGH or LOW depending on pinState digitalWrite(myDataPin, pinState); //register shifts bits on upstroke of clock pin digitalWrite(myClockPin, 1); //zero the data pin after shift to prevent bleed through digitalWrite(myDataPin, 0); } //stop shifting digitalWrite(myClockPin, 0); } Define two expression in rows[2][8]. Debug Step 1：Copy the code to IDE and compile it Step 2：Set up circuit, as follows： In order to protect the circuit, plus a 220Ω registor on the every connection line (total 8 lines) between one 74HC595 chip and 8*8 latteice LED. In our example, we don't use the registor, so the LED's brightnees is strong. If the lattice's quality is bad and easily broken. Step 3：Run program Result The expression will be changed on 8*8 8*8 lattice LED Video http://v.youku.com/v_show/id_XNjg2MDQ4ODQw.html