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| | ==设备== | | ==设备== |
| − | *'''[[Microduino-Core]]''' | + | *'''[[Microduino-Core/zh]]''' |
| − | *'''[[Microduino-FT232R]]''' | + | *'''[[Microduino-USBTTL/zh]]''' |
| | *其他硬件设备 | | *其他硬件设备 |
| | **面包板跳线 一盒 | | **面包板跳线 一盒 |
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| | ==原理图== | | ==原理图== |
| − | [[File:第二十七课-Microduino 8*8点阵静态显示原理图.jpg|600px|center|thumb]] | + | [[File:第二十七课-Microduino 8_8点阵静态显示原理图.jpg|600px|center|thumb]] |
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| | | 8 || 9 || 7 || Q7 | | | 8 || 9 || 7 || Q7 |
| | |} | | |} |
| − |
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| | | | |
| | ==程序== | | ==程序== |
| − | <source lang="cpp">
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| − |
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| − |
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| − | //Pin 连接到 74HC595的ST_CP
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| − | int latchPin = 8;
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| − | //Pin 连接到 74HC595的SH_CP
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| − | int clockPin = 12;
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| − | ////Pin 连接到 74HC595的DS
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| − | int dataPin = 11;
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| − |
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| − |
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| − |
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| − | void setup() {
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| − | //波特率为9600，用于调试
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| − | Serial.begin(9600);
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| − | //设置 latchpin 为 output
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| − | pinMode(latchPin, OUTPUT);
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| − |
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| − | }
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| − |
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| − | void loop() {
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| − | //Smile for 8x8 Matrix LED
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| − | digitalWrite(latchPin, 0);
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| − | shiftOut(dataPin, clockPin, B01111111); //掩盖的列(col)
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| − | shiftOut(dataPin, clockPin, B00111100); //行row
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| − | digitalWrite(latchPin, 1);
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| − |
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| − | digitalWrite(latchPin, 0);
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| − | shiftOut(dataPin, clockPin, B10111111); //掩盖的列(col)
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| − | shiftOut(dataPin, clockPin, B01000010); //行row
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| − | digitalWrite(latchPin, 1);
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| − |
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| − | digitalWrite(latchPin, 0);
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| − | shiftOut(dataPin, clockPin, B11011111); //掩盖的列(col)
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| − | shiftOut(dataPin, clockPin, B10100101); //行row
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| − | digitalWrite(latchPin, 1);
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| − |
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| − | digitalWrite(latchPin, 0);
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| − | shiftOut(dataPin, clockPin, B11101111); //掩盖的列(col)
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| − | shiftOut(dataPin, clockPin, B10000001); //行row
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| − | digitalWrite(latchPin, 1);
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| − |
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| − | digitalWrite(latchPin, 0);
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| − | shiftOut(dataPin, clockPin, B11110111); //掩盖的列(col)
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| − | shiftOut(dataPin, clockPin, B10100101); //行row
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| − | digitalWrite(latchPin, 1);
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| − |
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| − | digitalWrite(latchPin, 0);
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| − | shiftOut(dataPin, clockPin, B11111011); //掩盖的列(col)
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| − | shiftOut(dataPin, clockPin, B10011001); //行row
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| − | digitalWrite(latchPin, 1);
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| − |
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| − | digitalWrite(latchPin, 0);
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| − | shiftOut(dataPin, clockPin, B11111101); //掩盖的列(col)
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| − | shiftOut(dataPin, clockPin, B01000010); //行row
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| − | digitalWrite(latchPin, 1);
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| − |
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| − | digitalWrite(latchPin, 0);
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| − | shiftOut(dataPin, clockPin, B11111110); //掩盖的列(col)
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| − | shiftOut(dataPin, clockPin, B00111100); //行row
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| − | digitalWrite(latchPin, 1);
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| − |
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| − |
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| − | }
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| − |
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| − | void shiftOut(int myDataPin, int myClockPin, byte myDataOut) {
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| − |
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| − | //初始化设置
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| − | int i=0;
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| − | int pinState;
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| − | pinMode(myClockPin, OUTPUT);
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| − | pinMode(myDataPin, OUTPUT);
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| − |
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| − | //clear everything out just in case to
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| − | //prepare shift register for bit shifting
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| − | digitalWrite(myDataPin, 0);
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| − | digitalWrite(myClockPin, 0);
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| − |
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| − | //for each bit in the byte myDataOut�
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| − | //NOTICE THAT WE ARE COUNTING DOWN in our for loop
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| − | //This means that %00000001 or "1" will go through such
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| − | //that it will be pin Q0 that lights.
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| − | for (i=7; i>=0; i--) {
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| − | digitalWrite(myClockPin, 0);
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| − |
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| − | //if the value passed to myDataOut and a bitmask result
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| − | // true then... so if we are at i=6 and our value is
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| − | // %11010100 it would the code compares it to %01000000
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| − | // and proceeds to set pinState to 1.
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| − | if ( myDataOut & (1<<i) ) {
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| − | pinState= 1;
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| − | }
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| − | else {
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| − | pinState= 0;
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| − | }
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| − |
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| − | //Sets the pin to HIGH or LOW depending on pinState
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| − | digitalWrite(myDataPin, pinState);
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| − | //register shifts bits on upstroke of clock pin
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| − | digitalWrite(myClockPin, 1);
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| − | //zero the data pin after shift to prevent bleed through
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| − | digitalWrite(myDataPin, 0);
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| − | }
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| − |
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| − | //stop shifting
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| − | digitalWrite(myClockPin, 0);
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| − | }
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| − |
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| | | | |
| − | </source>
| + | [https://github.com/Microduino/Microduino_Tutorials/tree/master/Microduino_Advanced/Microduino8_8static Microduino8_8static] |
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| | ==调试== | | ==调试== |
| 第185行： |
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| | 步骤二：电路连接如下图： | | 步骤二：电路连接如下图： |
| − | [[File:第二十七课-Microduino 8*8点阵静态显示连接图.jpg|600px|center|thumb]] | + | [[File:第二十七课-Microduino 8_8点阵静态显示连接图.jpg|600px|center|thumb]] |
| | 为了更好的保护电路，可以在其中一个74HC595芯片连接8*8点阵之间的八条线中各加一个220欧姆电阻，本例中没有加入电阻所以LED特别亮，如果点阵的质量不好的话很容易坏掉。 | | 为了更好的保护电路，可以在其中一个74HC595芯片连接8*8点阵之间的八条线中各加一个220欧姆电阻，本例中没有加入电阻所以LED特别亮，如果点阵的质量不好的话很容易坏掉。 |
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