stm32_internal_flash_drivers.c File Reference

#include <string.h>
#include "stm32/stm32_internal_flash_drivers.h"
#include "stm32l4r5xx.h"
#include "stm32l4xx_hal.h"
#include "stm32l4xx_hal_flash.h"
#include "stm32l4xx_hal_flash_ex.h"

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Functions
uint8_t	STM32_internal_flash_write (uint32_t address, uint8_t *data, uint32_t length, STM32_Internal_Flash_Write_Status_t *status)
	Writes data to the flash memory in chunks of 8 bytes.
uint8_t	STM32_internal_flash_read (uint32_t address, uint8_t *buffer, uint32_t length)
	Reads data from the flash memory.
uint8_t	STM32_internal_flash_erase (uint16_t start_page_erase, uint16_t number_of_pages_to_erase, uint32_t *page_error)
	Erase pages from bank 2 of flash memory which is located at 0x08100000.
uint8_t	STM32_internal_flash_get_option_bytes (FLASH_OBProgramInitTypeDef *ob_data)
	Gets option bytes configuration from the stm32 internal flash memory.
uint8_t	STM32_internal_flash_set_active_flash_bank (uint8_t wanted_active_flash_bank)
	Sets the active flash bank to either 1 or 2 (only if it is different than the current active flash bank).
uint8_t	STM32_internal_flash_get_active_flash_bank ()
	Returns active flash bank.

Function Documentation

STM32_internal_flash_erase()

uint8_t STM32_internal_flash_erase	(	uint16_t	start_page_erase,
		uint16_t	number_of_pages_to_erase,
		uint32_t *	page_error )

Erase pages from bank 2 of flash memory which is located at 0x08100000.

Parameters

start_page_erase	what page to start erasing from
number_of_pages_to_erase	how many pages to erase
page_error	address of page which failed on error, defaults to UINT32_MAX on success

Returns

0 on success, 1 if HAL_FLASH_Unlock() failed, 2 if HAL_FLASH_Lock() failed

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STM32_internal_flash_get_active_flash_bank()

uint8_t STM32_internal_flash_get_active_flash_bank

(

)

Returns active flash bank.

Returns

1 is Flash Bank 1, 2 is Flash Bank 2

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STM32_internal_flash_get_option_bytes()

uint8_t STM32_internal_flash_get_option_bytes

(

FLASH_OBProgramInitTypeDef *

ob_data

)

Gets option bytes configuration from the stm32 internal flash memory.

Parameters

ob_data

pointer to an FLASH_OBProgramInitTypeDef structure that contains the configuration information for the programming.

Returns

0 always

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STM32_internal_flash_read()

uint8_t STM32_internal_flash_read	(	uint32_t	address,
		uint8_t *	buffer,
		uint32_t	length )

Reads data from the flash memory.

Parameters

address	address to start reading from
buffer	buffer to store the read data, must be length long
length	number of bytes to read

Returns

0 on success, > 0 on error

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STM32_internal_flash_set_active_flash_bank()

uint8_t STM32_internal_flash_set_active_flash_bank

(

uint8_t

wanted_active_flash_bank

)

Sets the active flash bank to either 1 or 2 (only if it is different than the current active flash bank).

On Success, will load application in desired flash bank

By Default, the active flash bank is 1

Parameters

wanted_active_flash_bank

1 or 2

Returns

0 on success, > 0 otherwise

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STM32_internal_flash_write()

uint8_t STM32_internal_flash_write	(	uint32_t	address,
		uint8_t *	data,
		uint32_t	length,
		STM32_Internal_Flash_Write_Status_t *	status )

Writes data to the flash memory in chunks of 8 bytes.

Parameters

address	Address in the flash memory where the data will be written.
data	uint8_t buffer containing the data to be written.
length	Length of the data to be written.

Returns

0 on success, > 0 on error

Note

Currently, only allowed to write to golden copy region

Writes data in chunks of 8 bytes. Ex: Suppose we wanted to write to address 0x00, and suppose that at address 0x00, the first 8 bytes looks like the following: [1,2,3,4,5,6,7,8]. If we wanted to write [25,26,27,28], it would result in the following: [25,26,27,28,0,0,0,0], clearing the rest of the bytes.

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