4x4矩阵按键控制流水灯
时间: 2023-09-16 13:13:09 浏览: 257
按键控制流水灯
好的,可以使用Arduino来实现这个功能,以下是示例代码:
```C++
int ledPins[4][4] = {
{2, 3, 4, 5},
{6, 7, 8, 9},
{10, 11, 12, 13},
{A0, A1, A2, A3}
};
int rowPins[4] = {A4, A5, 0, 1};
int colPins[4] = {4, 5, 6, 7};
int currentRow = 0;
unsigned long previousMillis = 0;
const long interval = 250;
void setup() {
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 4; j++) {
pinMode(ledPins[i][j], OUTPUT);
}
}
for (int i = 0; i < 4; i++) {
pinMode(rowPins[i], INPUT_PULLUP);
pinMode(colPins[i], OUTPUT);
}
}
void loop() {
unsigned long currentMillis = millis();
if (currentMillis - previousMillis >= interval) {
previousMillis = currentMillis;
digitalWrite(colPins[currentRow], LOW);
currentRow = (currentRow + 1) % 4;
digitalWrite(colPins[currentRow], HIGH);
}
for (int i = 0; i < 4; i++) {
if (digitalRead(rowPins[i]) == LOW) {
digitalWrite(ledPins[currentRow][i], HIGH);
} else {
digitalWrite(ledPins[currentRow][i], LOW);
}
}
}
```
这个代码使用了一个4x4的LED矩阵和4个行列扫描的按键。程序会每隔250毫秒切换到下一行,并且在当前行的列按键被按下时点亮对应的LED灯。你可以根据自己的需要修改代码中的LED和按键引脚,以及扫描间隔时间。
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