eeeck/the-waterinator
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Increase EEPROM lifespan by avoiding overwrites on addresses that

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contain identical values
This commit is contained in:
Erick
2025-10-01 15:34:11 +02:00
parent c60493810c
commit f4e690cf3c
2 changed files with 8 additions and 7 deletions
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firmware/atmega/include/eeprom.h
+2 -1
View File
@@ -4,7 +4,8 @@
#include <stdint.h> #include <stdint.h>
#include <avr/io.h> #include <avr/io.h>
#include <avr/interrupt.h> #include <avr/interrupt.h>
#include "config.h"
uint8_t eepromRead(uint8_t address); uint8_t eepromRead(uint8_t address);
void eepromWrite(uint8_t address, uint8_t data); void eepromWrite(uint8_t address, uint8_t data);
#endif
firmware/atmega/source/eeprom.c
+6 -6
View File
@@ -1,7 +1,6 @@
#include <stdint.h> #include <stdint.h>
#include <avr/io.h> #include <avr/io.h>
#include <avr/interrupt.h> #include <avr/interrupt.h>
#include "config.h"
uint8_t eepromRead(uint8_t address) { uint8_t eepromRead(uint8_t address) {
// wait for previous write // wait for previous write
@@ -16,10 +15,11 @@ void eepromWrite(uint8_t address, uint8_t data) {
// wait for previous write // wait for previous write
while (EECR & (1 << EEPE)); while (EECR & (1 << EEPE));
//write to address if (eepromRead(address) != data) {
EEAR = address; EEAR = address;
EEDR = data; EEDR = data;
EECR |= (1 << EEMPE); EECR |= (1 << EEMPE);
EECR |= (1 << EEPE); EECR |= (1 << EEPE);
}
} }