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SD: remove any reference to pinMode(10, OUTPUT) in the examples

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correct SS pin setup is already handled by SPI subsystem.
this should prevent future issues like #2868

current implementation assures that:
* pin10 is OUTPUT HIGH if SPI.begin() is called and the pin was unconfigured
* pin10 state is not modified if pinMode(10, OUTPUT) is called before SPI.begin()
* pin10 is INPUT HI-Z if nor pinMode(10, OUTPUT) nor SPI.begin() are called
This commit is contained in:
Martino Facchin
2015-04-13 17:33:01 +02:00
parent ae6a5d887d
commit a57d390499
6 changed files with 0 additions and 35 deletions
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7
libraries/SD/examples/DumpFile/DumpFile.ino
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@ -23,10 +23,6 @@
#include <SPI.h>
#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 = 4;
void setup()
@ -39,9 +35,6 @@ void setup()
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(10, OUTPUT);
// see if the card is present and can be initialized:
if (!SD.begin(chipSelect)) {