eeprom.h
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1 
23 /* Define to prevent recursive inclusion -------------------------------------*/
24 #ifndef __EEPROM_H
25 #define __EEPROM_H
26 
27 /* Includes ------------------------------------------------------------------*/
28 #include "stm32f4xx.h"
29 
30 /* Exported constants --------------------------------------------------------*/
31 /* Define the size of the sectors to be used */
32 #define PAGE_SIZE (uint32_t)0x4000 /* Page size = 16KByte */
33 
34 /* Device voltage range supposed to be [2.7V to 3.6V], the operation will
35  be done by word */
36 #define VOLTAGE_RANGE (uint8_t)VoltageRange_3
37 
38 /* EEPROM start address in Flash */
39 #define EEPROM_START_ADDRESS ((uint32_t)0x08004000) /* EEPROM emulation start address:
40  from sector1 : after 16KByte of used
41  Flash memory */
42 
43 /* Pages 0 and 1 base and end addresses */
44 #define PAGE0_BASE_ADDRESS ((uint32_t)(EEPROM_START_ADDRESS + 0x0000))
45 #define PAGE0_END_ADDRESS ((uint32_t)(EEPROM_START_ADDRESS + (PAGE_SIZE - 1)))
46 #define PAGE0_ID FLASH_Sector_1
47 
48 #define PAGE1_BASE_ADDRESS ((uint32_t)(EEPROM_START_ADDRESS + 0x4000))
49 #define PAGE1_END_ADDRESS ((uint32_t)(EEPROM_START_ADDRESS + (2 * PAGE_SIZE - 1)))
50 #define PAGE1_ID FLASH_Sector_2
51 
52 /* Used Flash pages for EEPROM emulation */
53 #define PAGE0 ((uint16_t)0x0000)
54 #define PAGE1 ((uint16_t)0x0001)
55 
56 /* No valid page define */
57 #define NO_VALID_PAGE ((uint16_t)0x00AB)
58 
59 /* Page status definitions */
60 #define ERASED ((uint16_t)0xFFFF) /* Page is empty */
61 #define RECEIVE_DATA ((uint16_t)0xEEEE) /* Page is marked to receive data */
62 #define VALID_PAGE ((uint16_t)0x0000) /* Page containing valid data */
63 
64 /* Valid pages in read and write defines */
65 #define READ_FROM_VALID_PAGE ((uint8_t)0x00)
66 #define WRITE_IN_VALID_PAGE ((uint8_t)0x01)
67 
68 /* Page full define */
69 #define PAGE_FULL ((uint8_t)0x80)
70 
71 /* Variables' number */
72 #define NB_OF_VAR ((uint8_t)160)
73 
74 /* Exported types ------------------------------------------------------------*/
75 /* Exported macro ------------------------------------------------------------*/
76 /* Exported functions ------------------------------------------------------- */
77 uint16_t EE_Init(void);
78 uint16_t EE_ReadVariable(uint16_t VirtAddress, uint16_t* Data);
79 uint16_t EE_WriteVariable(uint16_t VirtAddress, uint16_t Data);
80 
81 #endif /* __EEPROM_H */
82 
83 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
uint16_t EE_WriteVariable(uint16_t VirtAddress, uint16_t Data)
Writes/upadtes variable data in EEPROM.
Definition: eeprom.c:328
uint16_t EE_Init(void)
Restore the pages to a known good state in case of page's status corruption after a power loss...
Definition: eeprom.c:54
uint16_t EE_ReadVariable(uint16_t VirtAddress, uint16_t *Data)
Returns the last stored variable data, if found, which correspond to the passed virtual address...
Definition: eeprom.c:269