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