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authorThibaut VIARD <thibaut.viard@atmel.com>2011-06-21 00:20:43 +0200
committerThibaut VIARD <thibaut.viard@atmel.com>2011-06-21 00:20:43 +0200
commit0887b98f627500271b5ad8b3c4f6c7b90bc227ee (patch)
treeef8626954567ba22e392c68c8f3606416b07b5b5 /libraries/SD/examples/DumpFile
parent90c487402cefadb6a2aab907ab07075cbb759e34 (diff)
Moving all AVR specific libraries to hardware/avr
Diffstat (limited to 'libraries/SD/examples/DumpFile')
-rw-r--r--libraries/SD/examples/DumpFile/DumpFile.pde64
1 files changed, 64 insertions, 0 deletions
diff --git a/libraries/SD/examples/DumpFile/DumpFile.pde b/libraries/SD/examples/DumpFile/DumpFile.pde
new file mode 100644
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--- /dev/null
+++ b/libraries/SD/examples/DumpFile/DumpFile.pde
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+/*
+ SD card file dump
+
+ This example shows how to read a file from the SD card using the
+ SD library and send it over the serial port.
+
+ The circuit:
+ * SD card attached to SPI bus as follows:
+ ** MOSI - pin 11
+ ** MISO - pin 12
+ ** CLK - pin 13
+ ** CS - pin 4
+
+ created 22 December 2010
+
+ This example code is in the public domain.
+
+ */
+
+#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()
+{
+ 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(10, 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.");
+
+ // open the file. note that only one file can be open at a time,
+ // so you have to close this one before opening another.
+ File dataFile = SD.open("datalog.txt");
+
+ // if the file is available, write to it:
+ if (dataFile) {
+ while (dataFile.available()) {
+ Serial.write(dataFile.read());
+ }
+ dataFile.close();
+ }
+ // if the file isn't open, pop up an error:
+ else {
+ Serial.println("error opening datalog.txt");
+ }
+}
+
+void loop()
+{
+}
+