查看“Lesson 29--Microduino 8*8 Lattice Longitudinal Move Display”的源代码

{{Language|第二十九课--Microduino 8*8点阵纵向移动显示}}
{| style="width: 800px;"
|-
|
==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：'''
[[File:第二十九课-8_8点阵引脚定义.jpg|600px|center|thumb]]

==Schematic==
[[File:第二十九课-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 !! Lattcie 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 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);
}


</source>

Define the four longitudinal move actions in arry "byte rows[4][8]"

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

Step 2：Set up circuit, as follows：
[[File:第二十九课-Microduino8_8点阵纵向移动连接图.jpg|600px|center|thumb]]
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==
On 8*8 lattice LED, the smiling face will longitudinal move.
==Video==
http://v.youku.com/v_show/id_XNjg2MDUwOTQ4.html