Pkj：Created page with "{{Language|第二十七课--Microduino 8*8点阵静态显示}} {| style="width: 800px;" |- | ==Objective== The tutorial will teach you use two 74HC595 to control 8** lattice a..."

2014-03-17T11:38:15Z

Created page with "{{Language|第二十七课--Microduino 8*8点阵静态显示}} {| style="width: 800px;" |- | ==Objective== The tutorial will teach you use two 74HC595 to control 8** lattice a..."

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{{Language|第二十七课--Microduino 8*8点阵静态显示}}
{| style="width: 800px;"
|-
|
==Objective==
The tutorial will teach you use two 74HC595 to control 8** lattice and display a static smiling faces.
==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 introduction：'''
8*8 lattice LED is made of 64 light-emitting diodes, differenet type has different definition of the pin. This example uses the LD-1088BS 8*8 lattice LED, the pins are defined as follows:
[[File:第二十七课-Microduino 8_8点阵引脚定义.jpg|600px|center|thumb]]

==Schematice==
[[File:第二十七课-Microduino 8_8点阵静态显示原理图.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">

//Pin connects to 74HC595的ST_CP
int latchPin = 8;
//Pin connects to 74HC595的SH_CP
int clockPin = 12;
////Pin connects to 74HC595的DS
int dataPin = 11;

void setup() {
//Set barud roate 9600
Serial.begin(9600);
//Set the latchpin as output
pinMode(latchPin, OUTPUT);

}

void loop() {
//Smile for 8x8 Matrix LED
digitalWrite(latchPin, 0);
shiftOut(dataPin, clockPin, B01111111); //col
shiftOut(dataPin, clockPin, B00111100); //row
digitalWrite(latchPin, 1);

digitalWrite(latchPin, 0);
shiftOut(dataPin, clockPin, B10111111); //col
shiftOut(dataPin, clockPin, B01000010); //row
digitalWrite(latchPin, 1);

digitalWrite(latchPin, 0);
shiftOut(dataPin, clockPin, B11011111); //col
shiftOut(dataPin, clockPin, B10100101); //row
digitalWrite(latchPin, 1);

digitalWrite(latchPin, 0);
shiftOut(dataPin, clockPin, B11101111); //col
shiftOut(dataPin, clockPin, B10000001); //row
digitalWrite(latchPin, 1);

digitalWrite(latchPin, 0);
shiftOut(dataPin, clockPin, B11110111); //col
shiftOut(dataPin, clockPin, B10100101); //row
digitalWrite(latchPin, 1);

digitalWrite(latchPin, 0);
shiftOut(dataPin, clockPin, B11111011); //col
shiftOut(dataPin, clockPin, B10011001); //row
digitalWrite(latchPin, 1);

digitalWrite(latchPin, 0);
shiftOut(dataPin, clockPin, B11111101); //col)
shiftOut(dataPin, clockPin, B01000010); //row
digitalWrite(latchPin, 1);

digitalWrite(latchPin, 0);
shiftOut(dataPin, clockPin, B11111110); //col
shiftOut(dataPin, clockPin, B00111100); //row
digitalWrite(latchPin, 1);

}

void shiftOut(int myDataPin, int myClockPin, byte myDataOut) {

//initialization
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 myDataOutï¿½
//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>

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

Step 2：Set up circuit, as follows:
[[File:第二十七课-Microduino 8_8点阵静态显示连接图.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==

8*8 lattice LED will diaplya a smiling face.

==Video==

Lesson 27--Microduino 8*8 Lattice Static Display - 版本历史

Pkj：Created page with "{{Language|第二十七课--Microduino 8*8点阵静态显示}} {| style="width: 800px;" |- | ==Objective== The tutorial will teach you use two 74HC595 to control 8** lattice a..."