arduino正弦波算法
时间: 2023-10-10 16:13:21 浏览: 136
Arduino正弦波算法是一种用于生成正弦波的算法,可以实现在Arduino控制器上生成正弦波信号。一般来说,这种算法使用一个计数器变量,以及一个数组来存储正弦波的离散值。在Arduino控制器中,可以使用analogWrite()函数将计算出的正弦信号输出到数字引脚,从而控制外部设备的行为。
以下是一个简单的Arduino正弦波算法:
```c++
const int sinTable[256] = {
128,131,134,137,140,143,146,149,152,155,158,162,165,168,171,174,
176,179,182,185,188,191,193,196,199,201,204,206,209,211,213,216,
218,220,222,224,226,228,230,231,233,234,236,237,238,239,240,241,
242,243,243,244,245,245,246,246,247,247,247,247,247,247,247,246,
246,245,245,244,243,243,242,241,240,239,238,237,236,234,233,231,
230,228,226,224,222,220,218,216,213,211,209,206,204,201,199,196,
193,191,188,185,182,179,176,174,171,168,165,162,158,155,152,149,
146,143,140,137,134,131,128,125,122,119,116,113,110,107,104,101,
98,94,91,88,85,82,79,76,74,71,68,65,62,59,56,54,51,49,46,44,42,39,
37,35,33,31,29,27,25,24,22,21,19,18,17,16,15,14,13,12,11,10,9,8,7,
6,6,5,5,4,4,3,3,3,3,3,3,3,4,4,5,5,6,6,7,8,9,10,11,12,13,14,15,16,17,
18,19,21,22,24,25,27,29,31,33,35,37,39,42,44,46,49,51,54,56,59,62,
65,68,71,74,76,79,82,85,88,91,94,98,101,104,107,110,113,116,119,122,
125
};
int sinIndex = 0;
const int sinMax = 255;
void setup() {
// set up the output pin
pinMode(9, OUTPUT);
}
void loop() {
// calculate the next value of the sine wave
int sinValue = sinTable[sinIndex];
// output the sine wave to the PWM pin
analogWrite(9, sinValue);
// increment the index for the next cycle
sinIndex++;
if (sinIndex > sinMax) {
sinIndex = 0;
}
// delay for a short period of time
delay(10);
}
```
在这个算法中,我们定义了一个名为sinTable的数组,其中包含了正弦波的离散值。在setup()函数中,我们将数字引脚9设置为输出模式。在loop()函数中,我们使用sinIndex变量来迭代sinTable数组,以便生成正弦波。我们使用analogWrite()函数将计算出的正弦波值输出到数字引脚9上,并且使用delay()函数在每个周期之间添加短暂延迟。这个算法可以生成一个简单的正弦波,可以通过调整sinTable数组来调整正弦波的频率和振幅。
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