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/* Copyright 2019 Nick Brassel (tzarc)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <string.h>
#include "eeprom_driver.h"
uint8_t eeprom_read_byte(const uint8_t *addr) {
uint8_t ret;
eeprom_read_block(&ret, addr, 1);
return ret;
}
uint16_t eeprom_read_word(const uint16_t *addr) {
uint16_t ret;
eeprom_read_block(&ret, addr, 2);
return ret;
}
uint32_t eeprom_read_dword(const uint32_t *addr) {
uint32_t ret;
eeprom_read_block(&ret, addr, 4);
return ret;
}
void eeprom_write_byte(uint8_t *addr, uint8_t value) { eeprom_write_block(&value, addr, 1); }
void eeprom_write_word(uint16_t *addr, uint16_t value) { eeprom_write_block(&value, addr, 2); }
void eeprom_write_dword(uint32_t *addr, uint32_t value) { eeprom_write_block(&value, addr, 4); }
void eeprom_update_block(const void *buf, void *addr, size_t len) {
uint8_t read_buf[len];
eeprom_read_block(read_buf, addr, len);
if (memcmp(buf, read_buf, len) != 0) {
eeprom_write_block(buf, addr, len);
}
}
void eeprom_update_byte(uint8_t *addr, uint8_t value) {
uint8_t orig = eeprom_read_byte(addr);
if (orig != value) {
eeprom_write_byte(addr, value);
}
}
void eeprom_update_word(uint16_t *addr, uint16_t value) {
uint16_t orig = eeprom_read_word(addr);
if (orig != value) {
eeprom_write_word(addr, value);
}
}
void eeprom_update_dword(uint32_t *addr, uint32_t value) {
uint32_t orig = eeprom_read_dword(addr);
if (orig != value) {
eeprom_write_dword(addr, value);
}
}
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