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Add EEPROM emulation from AN2594. Fix emulated EEPROM size on large parts.
author Daniel O'Connor <darius@dons.net.au>
date Mon, 22 Apr 2013 23:17:40 +0930
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75:85f16813c730 76:f1c9a51e368a
1 /**
2 ******************************************************************************
3 * @file EEPROM_Emulation/inc/eeprom.h
4 * @author MCD Application Team
5 * @version V3.1.0
6 * @date 07/27/2009
7 * @brief This file contains all the functions prototypes for the EEPROM
8 * emulation firmware library.
9 ******************************************************************************
10 * @copy
11 *
12 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
13 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
14 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
15 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
16 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
17 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
18 *
19 * <h2><center>&copy; COPYRIGHT 2009 STMicroelectronics</center></h2>
20 */
21
22 /* Define to prevent recursive inclusion -------------------------------------*/
23 #ifndef __EEPROM_H
24 #define __EEPROM_H
25
26 /* Includes ------------------------------------------------------------------*/
27 #include "stm32f10x.h"
28
29 /* Exported constants --------------------------------------------------------*/
30 /* Define the STM32F10Xxx Flash page size depending on the used STM32 device */
31 #if defined (STM32F10X_LD) || defined (STM32F10X_MD)
32 #define PAGE_SIZE (uint16_t)0x400 /* Page size = 1KByte */
33 #elif defined (STM32F10X_HD) || defined (STM32F10X_CL)
34 #define PAGE_SIZE (uint16_t)0x800 /* Page size = 2KByte */
35 #endif
36
37 /* EEPROM start address in Flash */
38 extern uint32_t _seemul;
39 #define EEPROM_START_ADDRESS ((uint32_t)&_seemul) /* start of emulated EEPROM def'd in linker-script */
40
41 /* Pages 0 and 1 base and end addresses */
42 #define PAGE0_BASE_ADDRESS ((uint32_t)(EEPROM_START_ADDRESS + 0x000))
43 #define PAGE0_END_ADDRESS ((uint32_t)(EEPROM_START_ADDRESS + (PAGE_SIZE - 1)))
44
45 #define PAGE1_BASE_ADDRESS ((uint32_t)(EEPROM_START_ADDRESS + PAGE_SIZE))
46 #define PAGE1_END_ADDRESS ((uint32_t)(EEPROM_START_ADDRESS + (2 * PAGE_SIZE - 1)))
47
48 /* Used Flash pages for EEPROM emulation */
49 #define PAGE0 ((uint16_t)0x0000)
50 #define PAGE1 ((uint16_t)0x0001)
51
52 /* No valid page define */
53 #define NO_VALID_PAGE ((uint16_t)0x00AB)
54
55 /* Page status definitions */
56 #define ERASED ((uint16_t)0xFFFF) /* PAGE is empty */
57 #define RECEIVE_DATA ((uint16_t)0xEEEE) /* PAGE is marked to receive data */
58 #define VALID_PAGE ((uint16_t)0x0000) /* PAGE containing valid data */
59
60 /* Valid pages in read and write defines */
61 #define READ_FROM_VALID_PAGE ((uint8_t)0x00)
62 #define WRITE_IN_VALID_PAGE ((uint8_t)0x01)
63
64 /* Page full define */
65 #define PAGE_FULL ((uint8_t)0x80)
66
67 /* Variables' number */
68 #define NumbOfVar ((uint8_t)0x03)
69
70 /* Exported types ------------------------------------------------------------*/
71 /* Exported macro ------------------------------------------------------------*/
72 /* Exported functions ------------------------------------------------------- */
73 uint16_t EE_Init(void);
74 uint16_t EE_ReadVariable(uint16_t VirtAddress, uint16_t* Data);
75 uint16_t EE_WriteVariable(uint16_t VirtAddress, uint16_t Data);
76 FLASH_Status EE_Format(void);
77 void EE_Cmd(int argc, char **argv);
78
79 #endif /* __EEPROM_H */
80
81 /******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/