“检测颜色的RGB”的版本间的差异
第10行: | 第10行: | ||
*[[mCookie-Core]] | *[[mCookie-Core]] | ||
*[[mCookie-Battery]] | *[[mCookie-Battery]] | ||
− | *[[mCookie-Hub/zh]] | + | *[[mCookie-Hub/zh|mCookie-Hub]] |
*一张TF卡/MicroSD卡 | *一张TF卡/MicroSD卡 | ||
<br> | <br> |
2018年5月16日 (三) 09:57的版本
检测颜色的RGB示例
所需硬件
电路搭建 将Battery、Core、MCookie_SD堆叠在一起,并插入SD卡,通过MicroUSB数据线接入电脑。
代码 #include <SPI.h>
#include <SD.h>
File myFile;
void setup() {
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.print("Initializing SD card...");
// Microduino SD module: pin 7
if (!SD.begin(D7)) {
Serial.println("initialization failed!");
return;
}
Serial.println("initialization done.");
// open the file. note that only one file can be open at a time,
// so you have to close this one before opening another.
myFile = SD.open("test.txt", FILE_WRITE);
// if the file opened okay, write to it:
if (myFile) {
Serial.print("Writing to test.txt...");
myFile.println("testing 1, 2, 3.");
// close the file:
myFile.close();
Serial.println("done.");
} else {
// if the file didn't open, print an error:
Serial.println("error opening test.txt");
}
// re-open the file for reading:
myFile = SD.open("test.txt");
if (myFile) {
Serial.println("test.txt:");
// read from the file until there's nothing else in it:
while (myFile.available()) {
Serial.write(myFile.read());
}
// close the file:
myFile.close();
} else {
// if the file didn't open, print an error:
Serial.println("error opening test.txt");
}
}
void loop() {
// nothing happens after setup
}
若想真正确认SD卡中的内容,可以使用读卡器连接电脑,打开SD卡中的txt文件观察内容是否与程序一致
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