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