Andrew Klimenyuk / eeprom_flash

eeprom_flash

Dependents:   STM32F103C8T6_WIFI_Heating_system

Fork of eeprom_flash by Chau Vo

eeprom_flash.cpp@4:404dd375323c, 2018-09-18 (annotated)

Committer:
andrewklmn
Date:
Tue Sep 18 20:47:20 2018 +0000
Revision:
4:404dd375323c
Parent:
3:35953bc8607a 
change page address to 63k

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
andrewklmn 3:35953bc8607a 4 void _FLASH_PageErase(uint32_t PageAddress)
andrewklmn 3:35953bc8607a 5 {
andrewklmn 3:35953bc8607a 6 /* Proceed to erase the page */
andrewklmn 3:35953bc8607a 7 SET_BIT(FLASH->CR, FLASH_CR_PER);
andrewklmn 3:35953bc8607a 8 while (FLASH->SR & FLASH_SR_BSY);
andrewklmn 3:35953bc8607a 9 WRITE_REG(FLASH->AR, PageAddress);
andrewklmn 3:35953bc8607a 10 SET_BIT(FLASH->CR, FLASH_CR_STRT);
andrewklmn 3:35953bc8607a 11 while (FLASH->SR & FLASH_SR_BSY);
andrewklmn 3:35953bc8607a 12 CLEAR_BIT(FLASH->CR, FLASH_CR_PER);
andrewklmn 3:35953bc8607a 13 }
andrewklmn 2:a37f58f78b2b 14
olympux 0:ea2bec485611 15 /*
olympux 0:ea2bec485611 16 * Must call this first to enable writing
olympux 0:ea2bec485611 17 */
olympux 0:ea2bec485611 18 void enableEEPROMWriting() {
andrewklmn 3:35953bc8607a 19 HAL_FLASH_Unlock();
andrewklmn 3:35953bc8607a 20 _FLASH_PageErase(EEPROM_START_ADDRESS);
olympux 0:ea2bec485611 21 }
olympux 0:ea2bec485611 22
olympux 0:ea2bec485611 23 void disableEEPROMWriting() {
olympux 0:ea2bec485611 24 HAL_FLASH_Lock();
olympux 0:ea2bec485611 25 }
olympux 0:ea2bec485611 26
olympux 0:ea2bec485611 27 /*
olympux 0:ea2bec485611 28 * Writing functions
olympux 0:ea2bec485611 29 * Must call enableEEPROMWriting() first
olympux 0:ea2bec485611 30 */
olympux 0:ea2bec485611 31 HAL_StatusTypeDef writeEEPROMHalfWord(uint32_t address, uint16_t data) {
olympux 0:ea2bec485611 32 HAL_StatusTypeDef status;
olympux 0:ea2bec485611 33 address = address + EEPROM_START_ADDRESS;
olympux 0:ea2bec485611 34 status = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, address, data);
olympux 0:ea2bec485611 35 return status;
olympux 0:ea2bec485611 36 }
olympux 0:ea2bec485611 37
olympux 0:ea2bec485611 38 HAL_StatusTypeDef writeEEPROMWord(uint32_t address, uint32_t data) {
olympux 0:ea2bec485611 39 HAL_StatusTypeDef status;
olympux 0:ea2bec485611 40 address = address + EEPROM_START_ADDRESS;
olympux 0:ea2bec485611 41 status = HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, address, data);
olympux 0:ea2bec485611 42 return status;
olympux 0:ea2bec485611 43 }
olympux 0:ea2bec485611 44
olympux 0:ea2bec485611 45 /*
olympux 0:ea2bec485611 46 * Reading functions
olympux 0:ea2bec485611 47 */
olympux 0:ea2bec485611 48 uint16_t readEEPROMHalfWord(uint32_t address) {
olympux 0:ea2bec485611 49 uint16_t val = 0;
olympux 0:ea2bec485611 50 address = address + EEPROM_START_ADDRESS;
olympux 0:ea2bec485611 51 val = *(__IO uint16_t*)address;
olympux 0:ea2bec485611 52 return val;
olympux 0:ea2bec485611 53 }
olympux 0:ea2bec485611 54
olympux 0:ea2bec485611 55 uint32_t readEEPROMWord(uint32_t address) {
olympux 0:ea2bec485611 56 uint32_t val = 0;
olympux 0:ea2bec485611 57 address = address + EEPROM_START_ADDRESS;
olympux 0:ea2bec485611 58 val = *(__IO uint32_t*)address;
olympux 0:ea2bec485611 59 return val;
olympux 0:ea2bec485611 60 }