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EEPROM experiments

This commit is contained in:
Daniele Viganò 2020-06-02 00:58:01 +02:00
parent 9e39d4c7d2
commit 64def2a70e
Signed by: dani
GPG Key ID: DB49AFC03C40EE02
2 changed files with 117 additions and 0 deletions

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/***
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() {
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
readConfig(); //Run the next test.
}
struct config {
byte mac[6];
byte remoteAddr[4];
char serial[4];
int remotePort;
char name[128];
};
void printAddr(byte addr[], int size, Stream *stream) {
for (int thisByte = 0; thisByte < size; thisByte++) {
// print the value of each byte of the IP address:
stream->print(addr[thisByte], HEX);
if (thisByte < size - 1) {
stream->print(".");
}
}
}
void readConfig() {
int eeAddress = 0; //Move address to the next byte after float 'f'.
config customVar; //Variable to store custom object read from EEPROM.
EEPROM.get(eeAddress, customVar);
Serial.println("Read custom object from EEPROM: ");
printAddr(customVar.mac, sizeof(customVar.mac), &Serial);
Serial.println();
printAddr(customVar.remoteAddr, sizeof(customVar.remoteAddr), &Serial);
Serial.println();
Serial.println(customVar.remotePort);
Serial.println(customVar.serial);
Serial.println(customVar.name);
}
void loop() {
/* Empty loop */
}

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/***
eeprom_put example.
This shows how to use the EEPROM.put() method.
Also, this sketch will pre-set the EEPROM data for the
example sketch eeprom_get.
Note, unlike the single byte version EEPROM.write(),
the put method will use update semantics. As in a byte
will only be written to the EEPROM if the data is actually
different.
Written by Christopher Andrews 2015
Released under MIT licence.
***/
#include <EEPROM.h>
struct config {
byte mac[6];
byte remoteAddr[4];
char serial[4];
int remotePort;
char name[128];
};
void setup() {
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
int eeAddress = 0; //Location we want the data to be put.
/** Put is designed for use with custom structures also. **/
//Data to store.
config customVar = {
{ 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED },
{ 192, 168, 10, 123 },
"abcd",
80,
"sensor.server.domain"
};
EEPROM.put(eeAddress, customVar);
Serial.print("Written custom data type! \n\nView the example sketch eeprom_get to see how you can retrieve the values!");
}
void loop() {
/* Empty loop */
}