View source for Lesson 28--Microduino 8*8 Lattice Transverse Move Display

{{Language|第二十八课--Microduino 8*8点阵横向移动显示}}
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==Objective==
We have learned display a static smiling face, this lesson will teach you transverse 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：'''
[[File:第二十八课-8_8点阵引脚定义.jpg|600px|center|thumb]]

==Schematic==
[[File:第二十八课-Microduino8_8点阵横向移动原理图.jpg|600px|center|thumb]]


Pin Table:
{| class="wikitable"
|-
! 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
|}

{| class="wikitable"
|-
! 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==
<source lang="cpp">


//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 transverse moves
byte rows[4][8]={
  {
    B00111100,B01000010,B10100101,B10000001,B10100101,B10011001,B01000010,B00111100  }
  ,
  {
    B00011110,B00100001,B11010010,B11000000,B11010100,B11001100,B00100001,B00011110  }
  ,
  {
    B00001111,B10010000,B11101001,B01100000,B01101010,B01100110,B10010000,B00001111  }
  ,
   {
    B10000111,B01001000,B11110100,B00110000,B00110101,B00110011,B01001000,B10000111  }
};


void setup() {
  //Set baud rate 9600        
  Serial.begin(9600);
  //Set latchpin as output
  pinMode(latchPin, OUTPUT);

}

void loop() {

  //Smiling face transverse moves
  for(int j=0;j<4;j++) {
    unsigned long startTime = millis();
    for (unsigned long elapsed=0; elapsed < 1000; elapsed = millis() - startTime) {//Dispaly 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);
}

</source>

Define the four transverse move actions in array "byte rows[4][8]"

==Debug==
Step 1: Copy the code to IDE and compile it

Step 2: Set up circuit: 
[[File:第二十八课-Microduino8_8点阵横向移动连接图.jpg|600px|center|thumb]]
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 transverse move.
==Video==