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/*
* This software is experimental and a work in progress.
* Under no circumstances should these files be used in relation to any critical system(s).
* Use of these files is at your own risk.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* This files are free to use from http://engsta.com/stm32-flash-memory-eeprom-emulator/ by
* Artur F.
*
* Modifications for QMK and STM32F303 by Yiancar
*
* This library assumes 8-bit data locations. To add a new MCU, please provide the flash
* page size and the total flash size in Kb. The number of available pages must be a multiple
* of 2. Only half of the pages account for the total EEPROM size.
* This library also assumes that the pages are not used by the firmware.
*/
#ifndef __EEPROM_H
#define __EEPROM_H
#include "ch.h"
#include "hal.h"
#include "flash_stm32.h"
// HACK ALERT. This definition may not match your processor
// To Do. Work out correct value for EEPROM_PAGE_SIZE on the STM32F103CT6 etc
#if defined(EEPROM_EMU_STM32F303xC)
# define MCU_STM32F303CC
#elif defined(EEPROM_EMU_STM32F103xB)
# define MCU_STM32F103RB
#elif defined(EEPROM_EMU_STM32F072xB)
# define MCU_STM32F072CB
#else
# error "not implemented."
#endif
#ifndef EEPROM_PAGE_SIZE
# if defined(MCU_STM32F103RB)
# define FEE_PAGE_SIZE (uint16_t)0x400 // Page size = 1KByte
# define FEE_DENSITY_PAGES 2 // How many pages are used
# elif defined(MCU_STM32F103ZE) || defined(MCU_STM32F103RE) || defined(MCU_STM32F103RD) || defined(MCU_STM32F303CC) || defined(MCU_STM32F072CB)
# define FEE_PAGE_SIZE (uint16_t)0x800 // Page size = 2KByte
# define FEE_DENSITY_PAGES 4 // How many pages are used
# else
# error "No MCU type specified. Add something like -DMCU_STM32F103RB to your compiler arguments (probably in a Makefile)."
# endif
#endif
#ifndef EEPROM_START_ADDRESS
# if defined(MCU_STM32F103RB) || defined(MCU_STM32F072CB)
# define FEE_MCU_FLASH_SIZE 128 // Size in Kb
# elif defined(MCU_STM32F103ZE) || defined(MCU_STM32F103RE)
# define FEE_MCU_FLASH_SIZE 512 // Size in Kb
# elif defined(MCU_STM32F103RD)
# define FEE_MCU_FLASH_SIZE 384 // Size in Kb
# elif defined(MCU_STM32F303CC)
# define FEE_MCU_FLASH_SIZE 256 // Size in Kb
# else
# error "No MCU type specified. Add something like -DMCU_STM32F103RB to your compiler arguments (probably in a Makefile)."
# endif
#endif
// DONT CHANGE
// Choose location for the first EEPROM Page address on the top of flash
#define FEE_PAGE_BASE_ADDRESS ((uint32_t)(0x8000000 + FEE_MCU_FLASH_SIZE * 1024 - FEE_DENSITY_PAGES * FEE_PAGE_SIZE))
#define FEE_DENSITY_BYTES ((FEE_PAGE_SIZE / 2) * FEE_DENSITY_PAGES - 1)
#define FEE_LAST_PAGE_ADDRESS (FEE_PAGE_BASE_ADDRESS + (FEE_PAGE_SIZE * FEE_DENSITY_PAGES))
#define FEE_EMPTY_WORD ((uint16_t)0xFFFF)
#define FEE_ADDR_OFFSET(Address) (Address * 2) // 1Byte per Word will be saved to preserve Flash
// Use this function to initialize the functionality
uint16_t EEPROM_Init(void);
void EEPROM_Erase(void);
uint16_t EEPROM_WriteDataByte(uint16_t Address, uint8_t DataByte);
uint8_t EEPROM_ReadDataByte(uint16_t Address);
#endif /* __EEPROM_H */
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