mirror of
https://github.com/Keychron/qmk_firmware.git
synced 2024-12-25 18:48:05 +06:00
96 lines
2.9 KiB
C
96 lines
2.9 KiB
C
/* Copyright 2017 Fred Sundvik
|
|
*
|
|
* 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 "eeprom.h"
|
|
|
|
static uint8_t buffer[TOTAL_EEPROM_BYTE_COUNT];
|
|
|
|
uint8_t eeprom_read_byte(const uint8_t *addr) {
|
|
uintptr_t offset = (uintptr_t)addr;
|
|
return buffer[offset];
|
|
}
|
|
|
|
void eeprom_write_byte(uint8_t *addr, uint8_t value) {
|
|
uintptr_t offset = (uintptr_t)addr;
|
|
buffer[offset] = value;
|
|
}
|
|
|
|
uint16_t eeprom_read_word(const uint16_t *addr) {
|
|
const uint8_t *p = (const uint8_t *)addr;
|
|
return eeprom_read_byte(p) | (eeprom_read_byte(p + 1) << 8);
|
|
}
|
|
|
|
uint32_t eeprom_read_dword(const uint32_t *addr) {
|
|
const uint8_t *p = (const uint8_t *)addr;
|
|
return eeprom_read_byte(p) | (eeprom_read_byte(p + 1) << 8) | (eeprom_read_byte(p + 2) << 16) | (eeprom_read_byte(p + 3) << 24);
|
|
}
|
|
|
|
void eeprom_read_block(void *buf, const void *addr, size_t len) {
|
|
const uint8_t *p = (const uint8_t *)addr;
|
|
uint8_t * dest = (uint8_t *)buf;
|
|
while (len--) {
|
|
*dest++ = eeprom_read_byte(p++);
|
|
}
|
|
}
|
|
|
|
void eeprom_write_word(uint16_t *addr, uint16_t value) {
|
|
uint8_t *p = (uint8_t *)addr;
|
|
eeprom_write_byte(p++, value);
|
|
eeprom_write_byte(p, value >> 8);
|
|
}
|
|
|
|
void eeprom_write_dword(uint32_t *addr, uint32_t value) {
|
|
uint8_t *p = (uint8_t *)addr;
|
|
eeprom_write_byte(p++, value);
|
|
eeprom_write_byte(p++, value >> 8);
|
|
eeprom_write_byte(p++, value >> 16);
|
|
eeprom_write_byte(p, value >> 24);
|
|
}
|
|
|
|
void eeprom_write_block(const void *buf, void *addr, size_t len) {
|
|
uint8_t * p = (uint8_t *)addr;
|
|
const uint8_t *src = (const uint8_t *)buf;
|
|
while (len--) {
|
|
eeprom_write_byte(p++, *src++);
|
|
}
|
|
}
|
|
|
|
void eeprom_update_byte(uint8_t *addr, uint8_t value) {
|
|
eeprom_write_byte(addr, value);
|
|
}
|
|
|
|
void eeprom_update_word(uint16_t *addr, uint16_t value) {
|
|
uint8_t *p = (uint8_t *)addr;
|
|
eeprom_write_byte(p++, value);
|
|
eeprom_write_byte(p, value >> 8);
|
|
}
|
|
|
|
void eeprom_update_dword(uint32_t *addr, uint32_t value) {
|
|
uint8_t *p = (uint8_t *)addr;
|
|
eeprom_write_byte(p++, value);
|
|
eeprom_write_byte(p++, value >> 8);
|
|
eeprom_write_byte(p++, value >> 16);
|
|
eeprom_write_byte(p, value >> 24);
|
|
}
|
|
|
|
void eeprom_update_block(const void *buf, void *addr, size_t len) {
|
|
uint8_t * p = (uint8_t *)addr;
|
|
const uint8_t *src = (const uint8_t *)buf;
|
|
while (len--) {
|
|
eeprom_write_byte(p++, *src++);
|
|
}
|
|
}
|