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| 第48行： |
第48行： |
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| | ==程序== | | ==程序== |
| − | <source lang="cpp">
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| − | | + | https://github.com/Microduino/Microduino_Tutorials/tree/master/Microduino_Advanced/Microduino2digitCountdown |
| − | byte digit0 = 10; //十位数Microduino pin
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| − | byte digit1 = 11; //个位数Microduino pin
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| − | byte dotPin = 2; //数码管小数点对应的pin
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| − | | |
| − | byte sevenSegmentPins[] = {2,3,4,5,6,7,8}; //A,B,C,D,E,F,G 对应的Microduino pin
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| − | byte sevenSegment[10][7] =
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| − | {
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| − | //a b c d e f g
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| − | { 0,0,0,0,0,0,1 }, // = 0
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| − | { 1,0,0,1,1,1,1 }, // = 1
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| − | { 0,0,1,0,0,1,0 }, // = 2
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| − | { 0,0,0,0,1,1,0 }, // = 3
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| − | { 1,0,0,1,1,0,0 }, // = 4
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| − | { 0,1,0,0,1,0,0 }, // = 5
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| − | { 0,1,0,0,0,0,0 }, // = 6
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| − | { 0,0,0,1,1,1,1 }, // = 7
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| − | { 0,0,0,0,0,0,0 }, // = 8
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| − | { 0,0,0,1,1,0,0 } // = 9
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| − | };
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| − | | |
| − | void setup()
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| − | {
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| − | //初始化全部亮起
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| − | pinMode(dotPin, OUTPUT); //pin 9
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| − | pinMode(digit0, OUTPUT); //pin 10
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| − | pinMode(digit1, OUTPUT); //pin 11
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| − | | |
| − | for(int i=0; i<7; i++)
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| − | {
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| − | pinMode(sevenSegmentPins[i], OUTPUT);
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| − | }
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| − | digitalWrite(dotPin, HIGH);
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| − | digitalWrite(digit0, HIGH);
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| − | digitalWrite(digit1, HIGH);
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| − | }
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| − | | |
| − | //显示数字
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| − | void segmentWrite(byte digit)
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| − | {
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| − | byte pin = 2;
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| − | for (byte i=0; i<7; ++i)
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| − | {
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| − | digitalWrite(pin, sevenSegment[digit][i]);
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| − | ++pin;
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| − | }
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| − | }
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| − | | |
| − | void loop()
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| − | {
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| − | | |
| − | for(int i=9;i>=0;i--) {//倒计时十位数
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| − | for(int j=9;j>=0;j--) {//倒计时个位数
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| − |
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| − | unsigned long startTime = millis();
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| − | for (unsigned long elapsed=0; elapsed < 600; elapsed = millis() - startTime) {//持续显示600ms
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| − | digitalWrite(digit0, LOW); //熄灭十位数码管
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| − | segmentWrite(j); //显示个位
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| − | delay(10); //10ms 延迟
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| − | digitalWrite(digit0, HIGH); //点亮十位数码管
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| − | digitalWrite(digit1, LOW); //熄灭个位数码管
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| − | segmentWrite(i); //显示十位
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| − | delay(10); //10ms 延迟
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| − | digitalWrite(digit1, HIGH); //点亮个位数码管
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| − | }
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| − |
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| − | }
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| − | }
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| − | | |
| − | }
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| − | | |
| − | </source>
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| | ==调试== | | ==调试== |
