#ifndef FLASH_H_
#define FLASH_H_
#include "stm32f446xx.h"

// Flash sectors for STM32F407
#define BOOT         0x08000000  // 16KB - Bootloader
#define APP_ADDR     0x08004000  // 16KB - Application
#define SECTOR_2     0x08008000  // 16KB
#define SECTOR_3     0x0800C000  // 16KB
#define SECTOR_4     0x08010000  // 64KB
#define SECTOR_5     0x08020000  // 128KB
#define SECTOR_6     0x08040000  // 128KB
#define SECTOR_7     0x08060000  // 128KB


#define FLAG_BOOT    (0x08040000 + 4)
// Flash keys for unlocking flash memory
#define FLASH_KEY1   0x45670123
#define FLASH_KEY2   0xCDEF89AB

//FLASH SET ONE PROGRAMM WORD
#define FLASH_8BYTE  FLASH->CR &= ~FLASH_CR_PSIZE & ~FLASH_CR_PSIZE_1
#define FLASH_32BYTE FLASH->CR |= FLASH_CR_PSIZE | FLASH_CR_PSIZE_0

// Flash command bits
#define FLASH_LOCK   FLASH->CR |= FLASH_CR_LOCK
#define FLASH_UNLOCK FLASH->KEYR = FLASH_KEY1; FLASH->KEYR = FLASH_KEY2


// Flash status flags
#define FLASH_BUSY   (FLASH->SR & FLASH_SR_BSY)
#define FLASH_ERROR  (FLASH->SR & (FLASH_SR_WRPERR | FLASH_SR_PGAERR | FLASH_SR_PGPERR | FLASH_SR_PGSERR))

//for bootloader    
typedef void(*pFunction)(void); 

// Function prototypes
void flash_unlock(void);
void flash_lock(void);
void flash_erase_sector(uint8_t sector);
void flash_program_word(uint32_t address, uint32_t data,uint32_t byte_len);
uint8_t flash_read_word(uint32_t address);



#endif /* FLASH_H_ */