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Emulate eeprom

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This commit is contained in:
Fred Sundvik 2017-06-16 22:01:21 +03:00
parent f646f00b93
commit d29906cb64
4 changed files with 105 additions and 0 deletions
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4
tmk_core/common.mk
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@ -31,6 +31,10 @@ ifeq ($(PLATFORM),CHIBIOS)
TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/eeprom.c
endif
ifeq ($(PLATFORM),TEST)
TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/eeprom.c
endif
# Option modules

2
tmk_core/common/eeprom.h
View file

@ -4,6 +4,8 @@
#if defined(__AVR__)
#include <avr/eeprom.h>
#else
#include <stdint.h>
uint8_t eeprom_read_byte (const uint8_t *__p);
uint16_t eeprom_read_word (const uint16_t *__p);
uint32_t eeprom_read_dword (const uint32_t *__p);

98
tmk_core/common/test/eeprom.c Normal file
View file

@ -0,0 +1,98 @@
/* 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"
#define EEPROM_SIZE 32
static uint8_t buffer[EEPROM_SIZE];
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, uint32_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, uint32_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, uint32_t len) {
uint8_t *p = (uint8_t *)addr;
const uint8_t *src = (const uint8_t *)buf;
while (len--) {
eeprom_write_byte(p++, *src++);
}
}