blob: 662099990c50f3725947861219e2a9592477205c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
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 */ }
|
