Lesson 29--Microduino 8*8 Lattice Longitudinal Move Display

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Objective We have learned display a static smiling face, this lesson will teach you longitudinal move this smiling face. 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}; //Definition for smiling face longitudinal moves byte rows[4][8]={ { B00111100,B01000010,B10100101,B10000001,B10100101,B10011001,B01000010,B00111100 } , { B00111100,B00111100,B01000010,B10100101,B10000001,B10100101,B10011001,B01000010 } , { B01000010,B00111100,B00111100,B01000010,B10100101,B10000001,B10100101,B10011001 } , { B10011001,B01000010,B00111100,B00111100,B01000010,B10100101,B10000001,B10100101 } }; void setup() { //Set baud rate 9600 Serial.begin(9600); //Set latchpin as output pinMode(latchPin, OUTPUT); } void loop() { //Smiling face longitudinal moves for(int j=0;j<4;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 the four longitudinal move actions in array "byte rows[4][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 resistor on the every connection line (total 8 lines) between one 74HC595 chip and 8*8 lattice LED. In our example, we don't use the resistor, so the LED's brightness is strong. If the lattice's quality is bad and easily broken. Step 3：Run program Result On 8*8 lattice LED, the smiling face will longitudinal move. Video http://v.youku.com/v_show/id_XNjg2MDUwOTQ4.html