Patrice HAESAERT / Mbed 2 deprecated Tir_V40

Chrono

Dependencies:   mbed SDFileSystem

eeprom_flash.cpp@4:f5cff5165941, 2020-04-06 (annotated)

Committer:
pathae
Date:
Mon Apr 06 15:24:07 2020 +0000
Revision:
4:f5cff5165941
Parent:
3:46c0511e25af 
eeprom_flash

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"
pathae 2:68c9ff91504c 3 Serial pc(USBTX, USBRX); //Initalise PC serial comms
pathae 2:68c9ff91504c 4 DigitalOut myled(LED1);
olympux 0:ea2bec485611 5 /*
olympux 0:ea2bec485611 6 * Must call this first to enable writing
olympux 0:ea2bec485611 7 */
olympux 0:ea2bec485611 8 void enableEEPROMWriting() {
olympux 0:ea2bec485611 9 HAL_StatusTypeDef status = HAL_FLASH_Unlock();
olympux 0:ea2bec485611 10 FLASH_PageErase(EEPROM_START_ADDRESS); // required to re-write
pathae 2:68c9ff91504c 11 CLEAR_BIT(FLASH->CR, FLASH_CR_PER); // Bug fix: bit PER has been set in Flash_PageErase(), must clear it here
olympux 0:ea2bec485611 12 }
olympux 0:ea2bec485611 13
olympux 0:ea2bec485611 14 void disableEEPROMWriting() {
olympux 0:ea2bec485611 15 HAL_FLASH_Lock();
olympux 0:ea2bec485611 16 }
olympux 0:ea2bec485611 17
olympux 0:ea2bec485611 18 /*
pathae 4:f5cff5165941 19 * Writing function
olympux 0:ea2bec485611 20 * Must call enableEEPROMWriting() first
olympux 0:ea2bec485611 21 */
olympux 0:ea2bec485611 22 HAL_StatusTypeDef writeEEPROMHalfWord(uint32_t address, uint16_t data) {
olympux 0:ea2bec485611 23 HAL_StatusTypeDef status;
olympux 0:ea2bec485611 24 address = address + EEPROM_START_ADDRESS;
olympux 0:ea2bec485611 25 status = HAL_FLASH_Program(FLASH_TYPEPROGRAM_HALFWORD, address, data);
olympux 0:ea2bec485611 26 return status;
olympux 0:ea2bec485611 27 }
olympux 0:ea2bec485611 28
olympux 0:ea2bec485611 29 /*
olympux 0:ea2bec485611 30 * Reading functions
olympux 0:ea2bec485611 31 */
olympux 0:ea2bec485611 32 uint16_t readEEPROMHalfWord(uint32_t address) {
olympux 0:ea2bec485611 33 uint16_t val = 0;
olympux 0:ea2bec485611 34 address = address + EEPROM_START_ADDRESS;
olympux 0:ea2bec485611 35 val = *(__IO uint16_t*)address;
pathae 2:68c9ff91504c 36 return val;
olympux 0:ea2bec485611 37 }
olympux 0:ea2bec485611 38
pathae 2:68c9ff91504c 39 //Programme de test
pathae 2:68c9ff91504c 40
pathae 2:68c9ff91504c 41 int main() {
pathae 2:68c9ff91504c 42 int adresse = 0x00;
pathae 2:68c9ff91504c 43 char donnee1 = 11;
pathae 2:68c9ff91504c 44 char donnee2 = 22;
pathae 2:68c9ff91504c 45 char donnee3 = 33;
pathae 2:68c9ff91504c 46 int lecture;
pathae 2:68c9ff91504c 47 pc.baud(9600);
pathae 2:68c9ff91504c 48
pathae 2:68c9ff91504c 49 /* Ecriture*/
pathae 2:68c9ff91504c 50 enableEEPROMWriting(); //autorisation d'ecriture dans l'eeprom
pathae 2:68c9ff91504c 51 writeEEPROMHalfWord(adresse, donnee1);
pathae 2:68c9ff91504c 52 writeEEPROMHalfWord(adresse+2, donnee2);
pathae 2:68c9ff91504c 53 writeEEPROMHalfWord(adresse+4, donnee3);
pathae 2:68c9ff91504c 54 disableEEPROMWriting(); //Interdiction d'ecriture
pathae 2:68c9ff91504c 55
pathae 2:68c9ff91504c 56 myled=!myled;
pathae 2:68c9ff91504c 57 wait(0.5);
pathae 2:68c9ff91504c 58 myled=!myled;
pathae 2:68c9ff91504c 59 wait(0.5);
pathae 2:68c9ff91504c 60
pathae 2:68c9ff91504c 61 /*lecture et affichage*/
pathae 2:68c9ff91504c 62 lecture=readEEPROMHalfWord(adresse);
pathae 2:68c9ff91504c 63 if (lecture==11)
pathae 2:68c9ff91504c 64 {
pathae 2:68c9ff91504c 65 myled=!myled;
pathae 2:68c9ff91504c 66 wait(0.5);
pathae 2:68c9ff91504c 67 myled=!myled;
pathae 2:68c9ff91504c 68 wait(0.5);
pathae 2:68c9ff91504c 69 myled=!myled;
pathae 2:68c9ff91504c 70 wait(0.5);
pathae 2:68c9ff91504c 71 }
pathae 2:68c9ff91504c 72 pc.printf ("valeur lue: %d\n\r",lecture);
pathae 2:68c9ff91504c 73 lecture=readEEPROMHalfWord(adresse+2);
pathae 2:68c9ff91504c 74 pc.printf ("valeur lue: %d\n\r",lecture);
pathae 2:68c9ff91504c 75 lecture=readEEPROMHalfWord(adresse+4);
pathae 2:68c9ff91504c 76 pc.printf ("valeur lue: %d\n\r",lecture);
pathae 2:68c9ff91504c 77 while(1);
pathae 2:68c9ff91504c 78 }