用arduino ide开发,用光敏电阻控制ws2512灯带,灯带初始状态下亮蓝灯,光敏电阻阻值>600时,灯光改变为红色。光敏电阻输入口为a1,a2,a3,灯带输出口为a4,a5,a6,每条灯带初始亮30个灯,并使用millis进行多任务处理,计算光敏电阻在120000ms内感应到物体(阻值>600)的次数,感应次数越多,灯带亮起的灯数量越少。12000ms过后,计数归0,灯带亮起数量回归初始值30个
时间: 2023-06-25 21:04:04 浏览: 178
好的,下面是一个实现该功能的示例代码:
```
#define LDR_PIN_1 A1
#define LDR_PIN_2 A2
#define LDR_PIN_3 A3
#define LED_STRIP_PIN_1 A4
#define LED_STRIP_PIN_2 A5
#define LED_STRIP_PIN_3 A6
#define LED_STRIP_LENGTH 30
int ldrValue1, ldrValue2, ldrValue3;
int ledStrip1Brightness = 255, ledStrip2Brightness = 255, ledStrip3Brightness = 255;
int ledStrip1Counter = 0, ledStrip2Counter = 0, ledStrip3Counter = 0;
unsigned long lastTime = 0;
void setup() {
pinMode(LDR_PIN_1, INPUT);
pinMode(LDR_PIN_2, INPUT);
pinMode(LDR_PIN_3, INPUT);
pinMode(LED_STRIP_PIN_1, OUTPUT);
pinMode(LED_STRIP_PIN_2, OUTPUT);
pinMode(LED_STRIP_PIN_3, OUTPUT);
analogWrite(LED_STRIP_PIN_1, ledStrip1Brightness);
analogWrite(LED_STRIP_PIN_2, ledStrip2Brightness);
analogWrite(LED_STRIP_PIN_3, ledStrip3Brightness);
}
void loop() {
ldrValue1 = analogRead(LDR_PIN_1);
ldrValue2 = analogRead(LDR_PIN_2);
ldrValue3 = analogRead(LDR_PIN_3);
if (ldrValue1 > 600) {
analogWrite(LED_STRIP_PIN_1, 0);
ledStrip1Counter++;
} else {
analogWrite(LED_STRIP_PIN_1, ledStrip1Brightness);
}
if (ldrValue2 > 600) {
analogWrite(LED_STRIP_PIN_2, 0);
ledStrip2Counter++;
} else {
analogWrite(LED_STRIP_PIN_2, ledStrip2Brightness);
}
if (ldrValue3 > 600) {
analogWrite(LED_STRIP_PIN_3, 0);
ledStrip3Counter++;
} else {
analogWrite(LED_STRIP_PIN_3, ledStrip3Brightness);
}
unsigned long currentTime = millis();
if (currentTime - lastTime >= 120000) {
lastTime = currentTime;
if (ledStrip1Counter > 0) {
ledStrip1Brightness = map(ledStrip1Counter, 0, 10, 0, 255);
if (ledStrip1Brightness < 0) {
ledStrip1Brightness = 0;
}
analogWrite(LED_STRIP_PIN_1, ledStrip1Brightness);
ledStrip1Counter = 0;
}
if (ledStrip2Counter > 0) {
ledStrip2Brightness = map(ledStrip2Counter, 0, 10, 0, 255);
if (ledStrip2Brightness < 0) {
ledStrip2Brightness = 0;
}
analogWrite(LED_STRIP_PIN_2, ledStrip2Brightness);
ledStrip2Counter = 0;
}
if (ledStrip3Counter > 0) {
ledStrip3Brightness = map(ledStrip3Counter, 0, 10, 0, 255);
if (ledStrip3Brightness < 0) {
ledStrip3Brightness = 0;
}
analogWrite(LED_STRIP_PIN_3, ledStrip3Brightness);
ledStrip3Counter = 0;
}
}
}
```
该代码中使用了三个光敏电阻分别连接到 A1、A2、A3 引脚,三条灯带分别连接到 A4、A5、A6 引脚。在 `setup()` 函数中,将三条灯带的初始亮度设为最大值 255,然后在 `loop()` 函数中读取三个光敏电阻的阻值,如果阻值大于 600,则将相应的灯带亮度设为 0,并且对该灯带的计数器加一;否则将灯带亮度恢复到初始值,并且不进行计数。
使用 `millis()` 函数进行定时,在每 120000 毫秒(即 2 分钟)内统计每个灯带感应到物体的次数,并将次数映射为亮度值,然后将灯带亮度设为映射后的值,同时将计数器清零。如果感应次数多,则亮度值低,灯带亮起的灯数量就会变少。
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