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Diffstat (limited to 'libraries/EEPROM/examples/eeprom_get')
-rw-r--r-- | libraries/EEPROM/examples/eeprom_get/eeprom_get.ino | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/libraries/EEPROM/examples/eeprom_get/eeprom_get.ino b/libraries/EEPROM/examples/eeprom_get/eeprom_get.ino new file mode 100644 index 0000000..6620999 --- /dev/null +++ b/libraries/EEPROM/examples/eeprom_get/eeprom_get.ino @@ -0,0 +1,66 @@ +/*** + eeprom_get example. + + This shows how to use the EEPROM.get() method. + + To pre-set the EEPROM data, run the example sketch eeprom_put. + This sketch will run without it, however, the values shown + will be shown from what ever is already on the EEPROM. + + This may cause the serial object to print out a large string + of garbage if there is no null character inside one of the strings + loaded. + + Written by Christopher Andrews 2015 + Released under MIT licence. +***/ + +#include <EEPROM.h> + +void setup(){ + + float f = 0.00f; //Variable to store data read from EEPROM. + int eeAddress = 0; //EEPROM address to start reading from + + Serial.begin( 9600 ); + while (!Serial) { + ; // wait for serial port to connect. Needed for Leonardo only + } + Serial.print( "Read float from EEPROM: " ); + + //Get the float data from the EEPROM at position 'eeAddress' + EEPROM.get( eeAddress, f ); + Serial.println( f, 3 ); //This may print 'ovf, nan' if the data inside the EEPROM is not a valid float. + + /*** + As get also returns a reference to 'f', you can use it inline. + E.g: Serial.print( EEPROM.get( eeAddress, f ) ); + ***/ + + /*** + Get can be used with custom structures too. + I have separated this into an extra function. + ***/ + + secondTest(); //Run the next test. +} + +struct MyObject{ + float field1; + byte field2; + char name[10]; +}; + +void secondTest(){ + int eeAddress = sizeof(float); //Move address to the next byte after float 'f'. + + MyObject customVar; //Variable to store custom object read from EEPROM. + EEPROM.get( eeAddress, customVar ); + + Serial.println( "Read custom object from EEPROM: " ); + Serial.println( customVar.field1 ); + Serial.println( customVar.field2 ); + Serial.println( customVar.name ); +} + +void loop(){ /* Empty loop */ }
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