我正在尝试读取和写入SD卡的数据，但在代码的开头我错误卡失败或没有呈现 . 我更改了为Arduino Uno编写的示例代码中的引脚，但仍然给出了相同的错误.I我正在使用Arduino Mega 2560.How我可以解决这个问题吗？我的代码在这里：
#include <SD.h>
// On the Ethernet Shield, CS is pin 4. Note that even if it's not
// used as the CS pin, the hardware CS pin (10 on most Arduino boards,
// 53 on the Mega) must be left as an output or the SD library
// functions will not work.
const int chipSelect = 53;
void setup()
{
Serial.begin(9600);
Serial.print("Initializing SD card...");
// make sure that the default chip select pin is set to
// output, even if you don't use it:
pinMode(53, OUTPUT);
// see if the card is present and can be initialized:
if (!SD.begin(chipSelect)) {
Serial.println("Card failed, or not present");
// don't do anything more:
return;
}
Serial.println("card initialized.");
}
void loop()
{
}
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如果它很低，Wiznet芯片会破坏SPI总线 . (More details)