Andrew Klimenyuk / eeprom_flash

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Dependents:   STM32F103C8T6_WIFI_Heating_system

Fork of eeprom_flash by Chau Vo

eeprom_flash.cpp@2:a37f58f78b2b, 2018-09-17 (annotated)

Committer:
andrewklmn
Date:
Mon Sep 17 20:15:21 2018 +0000
Revision:
2:a37f58f78b2b
Parent:
0:ea2bec485611
Child:
3:35953bc8607a
epprom_flash updated

Who changed what in which revision?

UserRevisionLine numberNew contents of line
olympux 0:ea2bec485611 1 #include "mbed.h"
olympux 0:ea2bec485611 2 #include "eeprom_flash.h"
olympux 0:ea2bec485611 3
olympux 0:ea2bec485611 4 /*
olympux 0:ea2bec485611 5 * Debug option
olympux 0:ea2bec485611 6 */
olympux 0:ea2bec485611 7 #if 0
olympux 0:ea2bec485611 8 //Enable debug
olympux 0:ea2bec485611 9 #include <cstdio>
olympux 0:ea2bec485611 10 #define DBG(x, ...) std::printf("[eeprom: DBG]"x"\r\n", ##__VA_ARGS__);
olympux 0:ea2bec485611 11 #define WARN(x, ...) std::printf("[eeprom: WARN]"x"\r\n", ##__VA_ARGS__);
olympux 0:ea2bec485611 12 #define ERR(x, ...) std::printf("[eeprom: ERR]"x"\r\n", ##__VA_ARGS__);
olympux 0:ea2bec485611 13 #else
olympux 0:ea2bec485611 14 //Disable debug
olympux 0:ea2bec485611 15 #define DBG(x, ...)
olympux 0:ea2bec485611 16 #define WARN(x, ...)
olympux 0:ea2bec485611 17 #define ERR(x, ...)
olympux 0:ea2bec485611 18 #endif
olympux 0:ea2bec485611 19
andrewklmn 2:a37f58f78b2b 20 FLASH_EraseInitTypeDef eraseInit = {
andrewklmn 2:a37f58f78b2b 21 FLASH_TYPEERASE_PAGES, /*!< Pages erase only (Mass erase is disabled)*/
andrewklmn 2:a37f58f78b2b 22 0, /*!< Select banks to erase when Mass erase is enabled.*/
andrewklmn 2:a37f58f78b2b 23 EEPROM_START_ADDRESS, /*!< Initial FLASH page address to erase when mass erase is disabled
andrewklmn 2:a37f58f78b2b 24 This parameter must be a number between Min_Data = 0x08000000 and Max_Data = FLASH_BANKx_END
andrewklmn 2:a37f58f78b2b 25 (x = 1 or 2 depending on devices)*/
andrewklmn 2:a37f58f78b2b 26 1 /*!< Number of pagess to be erased.
andrewklmn 2:a37f58f78b2b 27 This parameter must be a value between Min_Data = 1 and Max_Data = (max number of pages - value of initial page)*/
andrewklmn 2:a37f58f78b2b 28 };
andrewklmn 2:a37f58f78b2b 29
andrewklmn 2:a37f58f78b2b 30 uint32_t pageError;
andrewklmn 2:a37f58f78b2b 31
andrewklmn 2:a37f58f78b2b 32
olympux 0:ea2bec485611 33 /*
olympux 0:ea2bec485611 34 * Must call this first to enable writing
olympux 0:ea2bec485611 35 */
olympux 0:ea2bec485611 36 void enableEEPROMWriting() {
olympux 0:ea2bec485611 37 HAL_StatusTypeDef status = HAL_FLASH_Unlock();
andrewklmn 2:a37f58f78b2b 38 //FLASH_PageErase(EEPROM_START_ADDRESS); // required to re-write
andrewklmn 2:a37f58f78b2b 39 //CLEAR_BIT(FLASH->CR, FLASH_CR_PER); // Bug fix: bit PER has been set in Flash_PageErase(), must clear it here
andrewklmn 2:a37f58f78b2b 40 HAL_FLASHEx_Erase(&eraseInit, &pageError);
olympux 0:ea2bec485611 41 }
olympux 0:ea2bec485611 42
olympux 0:ea2bec485611 43 void disableEEPROMWriting() {
olympux 0:ea2bec485611 44 HAL_FLASH_Lock();
olympux 0:ea2bec485611 45 }
olympux 0:ea2bec485611 46
olympux 0:ea2bec485611 47 /*
olympux 0:ea2bec485611 48 * Writing functions
olympux 0:ea2bec485611 49 * Must call enableEEPROMWriting() first
olympux 0:ea2bec485611 50 */
olympux 0:ea2bec485611 51 HAL_StatusTypeDef writeEEPROMHalfWord(uint32_t address, uint16_t data) {
olympux 0:ea2bec485611 52 HAL_StatusTypeDef status;
olympux 0:ea2bec485611 53 address = address + EEPROM_START_ADDRESS;
olympux 0:ea2bec485611 54
olympux 0:ea2bec485611 55 status = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, address, data);
olympux 0:ea2bec485611 56
olympux 0:ea2bec485611 57 return status;
olympux 0:ea2bec485611 58 }
olympux 0:ea2bec485611 59
olympux 0:ea2bec485611 60 HAL_StatusTypeDef writeEEPROMWord(uint32_t address, uint32_t data) {
olympux 0:ea2bec485611 61 HAL_StatusTypeDef status;
olympux 0:ea2bec485611 62 address = address + EEPROM_START_ADDRESS;
olympux 0:ea2bec485611 63
olympux 0:ea2bec485611 64 status = HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, address, data);
olympux 0:ea2bec485611 65
olympux 0:ea2bec485611 66 return status;
olympux 0:ea2bec485611 67 }
olympux 0:ea2bec485611 68
olympux 0:ea2bec485611 69 /*
olympux 0:ea2bec485611 70 * Reading functions
olympux 0:ea2bec485611 71 */
olympux 0:ea2bec485611 72 uint16_t readEEPROMHalfWord(uint32_t address) {
olympux 0:ea2bec485611 73 uint16_t val = 0;
olympux 0:ea2bec485611 74 address = address + EEPROM_START_ADDRESS;
olympux 0:ea2bec485611 75 val = *(__IO uint16_t*)address;
olympux 0:ea2bec485611 76
olympux 0:ea2bec485611 77 return val;
olympux 0:ea2bec485611 78 }
olympux 0:ea2bec485611 79
olympux 0:ea2bec485611 80 uint32_t readEEPROMWord(uint32_t address) {
olympux 0:ea2bec485611 81 uint32_t val = 0;
olympux 0:ea2bec485611 82 address = address + EEPROM_START_ADDRESS;
olympux 0:ea2bec485611 83 val = *(__IO uint32_t*)address;
olympux 0:ea2bec485611 84
olympux 0:ea2bec485611 85 return val;
olympux 0:ea2bec485611 86 }