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-rw-r--r--libraries/SD/examples/ReadWrite/ReadWrite.ino8
1 files changed, 7 insertions, 1 deletions
diff --git a/libraries/SD/examples/ReadWrite/ReadWrite.ino b/libraries/SD/examples/ReadWrite/ReadWrite.ino
index 9957218..5805fc8 100644
--- a/libraries/SD/examples/ReadWrite/ReadWrite.ino
+++ b/libraries/SD/examples/ReadWrite/ReadWrite.ino
@@ -11,7 +11,7 @@
created Nov 2010
by David A. Mellis
- updated 2 Dec 2010
+ modified 9 Apr 2012
by Tom Igoe
This example code is in the public domain.
@@ -24,7 +24,13 @@ 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 Leonardo only
+ }
+
+
Serial.print("Initializing SD card...");
// On the Ethernet Shield, CS is pin 4. It's set as an output by default.
// Note that even if it's not used as the CS pin, the hardware SS pin