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想做一个按键控制sd卡存储的装置,但是在loop里运行这部分代码之后感觉loop结束了,不运行这部分代码就可以正常循环,求大佬解答!
if(digitalRead(6) == LOW) {
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.print("Initializing SD card...");
if (!SD.begin(4)) {
Serial.println("initialization failed!");
}
Serial.println("initialization done.");
myFile = SD.open("test.txt", FILE_WRITE);
// if the file opened okay, write to it:
if (myFile) {
Serial.print("Writing to test.txt...");
lcd.clear();
lcd.setCursor(0,0); //设置显示指针
lcd.print("Writing to test.txt...");
myFile.println("Height = ");
myFile.println(Len_mm, DEC);
myFile.println(" mm");
myFile.println("Weight = ");
myFile.println(Weight);
myFile.println(" g");
// close the file:
myFile.close();
Serial.println("done.");
lcd.clear();
lcd.setCursor(0,0); //设置显示指针
lcd.print("done. ");
delay(1000);
}
else {
// if the file didn't open, print an error:
Serial.println("error opening test.txt");
}
} |
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