#include "mbed.h"

Serial pc(USBTX, USBRX);



int main()
{
				
	    uint32_t a[32]={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32};
		
		uint32_t *rawdata=&a[0];
		
		HAL_StatusTypeDef status;
		
		FLASH_EraseInitTypeDef erase_pages;
		erase_pages.PageAddress=0x0807ff00;
		erase_pages.NbPages=1;
		erase_pages.TypeErase=TYPEERASE_PAGES;
		uint32_t *error; 
		
		HAL_FLASH_Unlock(); 
	    HAL_FLASHEx_Erase(&erase_pages, error);
		HAL_FLASH_Lock();
			
		
		HAL_FLASH_Unlock(); 
	    status=HAL_FLASHEx_HalfPageProgram(0x0807ff00,rawdata);
		HAL_FLASH_Lock(); 
			
		
		uint32_t address=0x0807ff00;
		for(int i=0;i<32;i++)
		{
		  uint32_t tmp = 0;
          tmp = *(__IO uint32_t*)address;
		  pc.printf("value=%d\n\r",tmp);
		  address=address+4;
		}
	
    
}

I'm trying to write some data on internal Flash of L152RE but after I reset the microcontroller either it hangs or whole flash is erased. It simple do nothing after reset. Here is the sample code: <<code title=include the mbed library with this snippet>> #include "mbed.h" Serial pc(USBTX, USBRX); int main() { uint32_t a[32]={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32}; uint32_t *rawdata=&a[0]; HAL_StatusTypeDef status; FLASH_EraseInitTypeDef erase_pages; erase_pages.PageAddress=0x0807ff00; erase_pages.NbPages=1; erase_pages.TypeErase=TYPEERASE_PAGES; uint32_t *error; HAL_FLASH_Unlock(); HAL_FLASHEx_Erase(&erase_pages, error); HAL_FLASH_Lock(); HAL_FLASH_Unlock(); status=HAL_FLASHEx_HalfPageProgram(0x0807ff00,rawdata); HAL_FLASH_Lock(); uint32_t address=0x0807ff00; for(int i=0;i<32;i++) { uint32_t tmp = 0; tmp = *(__IO uint32_t*)address; pc.printf("value=%d\n\r",tmp); address=address+4; } } <</code>> Kindly somebody tell me what's the error? Thank you.

Hi, I'm also trying to write some data on internal Flash of L152RE But i couldn't find out any library in mbed.so i'm stucked very badly, I'm new to this envronment.could you please help me? Thank you.

HAL_StatusTypeDef writeEEPROMByte(uint32_t address, uint8_t data)
 {
    HAL_StatusTypeDef  status;
    address = address + 0x08080000;
    HAL_FLASHEx_DATAEEPROM_Unlock();  //Unprotect the EEPROM to allow writing
    status = HAL_FLASHEx_DATAEEPROM_Program(TYPEPROGRAMDATA_BYTE, address, data);
    HAL_FLASHEx_DATAEEPROM_Lock();  // Reprotect the EEPROM
    return status;
}

Mbed provides you the abstraction for **"stm32l1xx_flash.h"** <<code title=include the mbed library with this snippet>> HAL_StatusTypeDef writeEEPROMByte(uint32_t address, uint8_t data) { HAL_StatusTypeDef status; address = address + 0x08080000; HAL_FLASHEx_DATAEEPROM_Unlock(); //Unprotect the EEPROM to allow writing status = HAL_FLASHEx_DATAEEPROM_Program(TYPEPROGRAMDATA_BYTE, address, data); HAL_FLASHEx_DATAEEPROM_Lock(); // Reprotect the EEPROM return status; } <</code>> I have tried it on **uVision v5** and it's working fine, I'm not sure about the online compiler. For complete documentation: http://developer.mbed.org/users/mbed_official/code/mbed-src/docs/7f9d41292847/stm32l1xx__hal__flash__ex_8c.html