采用MAX7219四合一点阵模块模拟不同声音频率的图示 的代码
时间: 2023-06-14 18:07:24 浏览: 44
以下使用MAX7219四合一点阵模块模拟不同声音频率的示例代码,该代码使用Arduino编写:
```
#include <MD_Parola.h>
#include <MD_MAX72xx.h>
#include <SPI.h>
#define HARDWARE_TYPE MD_MAX72XX::GENERIC_HW
#define MAX_DEVICES 4
#define CLK_PIN 13
#define DATA_PIN 11
#define CS_PIN 10
MD_Parola P = MD_Parola(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);
void setup()
{
P.begin();
P.setIntensity(5);
P.displayText("Sound Frequency", PA_CENTER, 0, 0, PA_PRINT, PA_NO_EFFECT);
}
void loop()
{
int frequency = 200; // starting frequency
int delayTime = 500; // starting delay time
int maxFrequency = 2000; // maximum frequency
int minFrequency = 200; // minimum frequency
int maxDelay = 1000; // maximum delay time
int minDelay = 50; // minimum delay time
int currentDelay = delayTime;
int currentFrequency = frequency;
int i = 0;
while (true) {
// calculate the current delay and frequency based on the counter
currentDelay = map(i, 0, 100, maxDelay, minDelay);
currentFrequency = map(i, 0, 100, minFrequency, maxFrequency);
// update the display with the current frequency
P.displayText(String(currentFrequency) + "Hz", PA_CENTER, 0, 0, PA_PRINT, PA_NO_EFFECT);
// generate the sound by toggling the LED matrix
for (int j = 0; j < 8; j++) {
for (int k = 0; k < 8; k++) {
if ((j + k) % 2 == 0) {
P.setLed(j, k, true);
} else {
P.setLed(j, k, false);
}
}
}
// delay for the current delay time
delay(currentDelay);
// turn off the LED matrix to create a pause between sounds
for (int j = 0; j < 8; j++) {
for (int k = 0; k < 8; k++) {
P.setLed(j, k, false);
}
}
// delay for the current delay time
delay(currentDelay);
// increment the counter
i++;
if (i > 100) {
i = 0;
}
}
}
```
该代码使用MAX7219四合一点阵模块模拟不同声音频率,并在LED矩阵上显示当前频率。在循环中使用计数器来计算当前延迟时间和频率,并使用LED矩阵生成声音。每个声音都由一个短暂的闪烁和一个短暂的暂停组成,以便模拟不同的声音频率。