给出以arduino为基础的数字存储示波器代码
时间: 2024-03-23 10:39:08 浏览: 13
以下是一个基于Arduino的简单数字存储示波器代码:
```
#include <SD.h>
#include <SPI.h>
#include <TFT.h> //需要安装Adafruit_GFX和Adafruit_ILI9341库
const int chipSelect = 4; //SD卡芯片选择引脚
const int analogInPin = A0; //模拟输入引脚
const int screenW = 320; //屏幕宽度
const int screenH = 240; //屏幕高度
const int numSamples = 1000; //采样数量
const int sampleInterval = 10; //采样时间间隔,单位毫秒
const int xScale = 2; //x轴缩放比例
const int yScale = 4; //y轴缩放比例
const int yZero = screenH / 2; //y轴零点坐标
int samples[numSamples]; //存储采样值的数组
int sampleIndex = 0; //当前采样索引
TFT screen = TFT(9, 10, 8); //TFT屏幕
void setup() {
Serial.begin(9600);
pinMode(chipSelect, OUTPUT);
if (!SD.begin(chipSelect)) {
Serial.println("SD卡初始化失败!");
return;
}
Serial.println("SD卡初始化成功!");
screen.begin();
screen.fillScreen(TFT_BLACK);
}
void loop() {
int value = analogRead(analogInPin);
samples[sampleIndex] = value;
sampleIndex++;
if (sampleIndex >= numSamples) {
sampleIndex = 0;
drawWaveform();
saveWaveform();
}
delay(sampleInterval);
}
void drawWaveform() {
screen.fillScreen(TFT_BLACK);
int x = 0;
int y = yZero - samples[0] / yScale;
for (int i = 1; i < numSamples; i++) {
int newY = yZero - samples[i] / yScale;
screen.drawLine(x, y, x + xScale, newY, TFT_WHITE);
x += xScale;
y = newY;
}
screen.updateScreen();
}
void saveWaveform() {
File dataFile = SD.open("data.txt", FILE_WRITE);
if (dataFile) {
for (int i = 0; i < numSamples; i++) {
dataFile.print(samples[i]);
dataFile.print(",");
}
dataFile.println();
dataFile.close();
Serial.println("数据已写入SD卡!");
} else {
Serial.println("无法打开数据文件!");
}
}
```
该代码将模拟输入引脚的值读取到一个数组中,并定期将这些值绘制到TFT屏幕上,并将它们写入SD卡上的一个文本文件中。在需要时,可以将SD卡插入计算机,使用文本编辑器打开该文件,并将其导入示波器软件中。