Stm32 Flash read/write [library function]

one. Stm32 Flash is divided into1. Primary storage block: Used to save the specific program code and user Data , the primary storage block is divided into pages,a page size of 1KB. The range is within 128KB beginning with address 0x08000000. 2. Information BLOCK: For the User configuration information area that is responsible for the 2KB Boot program (Bootloader) and 512B that is shipped by Stm32 factory two. Operating Principleswrite operation to Flash to " Erase first write " principle;Stm32 's built-in flash programming operations are written in pages, and the operation must be written in 16- bit half -width data bit units, allowing cross-page writes, and writing non-16-bit data will cause stm32 internal bus errors . the internal RC oscillator must be turned on when the built-in flash reads and writes.
header file:

#ifndef __bsp_flash_h#define__bsp_flash_h#include "stm32f10x.h" typedef enum {FLASH_WRITE_OK = 1,flash_wrike_no = 0, FLASH_READ_OK = 1,flash_read_no = 0}flash_flag; extern unsigned char flash_write (unsigned short int * memory_data); extern unsigned char flash_read (unsigned short int * memory_data,unsigned short int n); #endif/* __led_h */

Read and Write functions:

#include "bsp_flash.h" Flash_flag flash_status;static u32 count = 0;/**---------------------------------------------- -----------------------------------* @brief Flash Write essential steps * @param input data start address * @retval function has not been executed------------------- -------------------------------------------------------------*/unsigned Char flash_write (unsigned short int * memory _data) {static int t;count = 0;/*enables or disables the Internal high speed oscillator (HSI). */rcc_hsicmd (ENABLE);/* Open Flas H erasable Controller */flash_unlock ();/* will FLASH three flag bits full */flash_clearflag (flash_flag_eop| flash_flag_pgerr| FLASH_FLAG_WRPRTERR); Flash_erasepage (0x8002000); t = sizeof ((const char *) memory_data), while (Count <= t) {/*flash is stored as one byte, 16-bit data must be address plus 2*/ Flash_programhalfword ((0x8002000 +count*2), * (Memory_data+count)); Count++;if (Count > t) {flash_status = Flash_wrike_no;return flash_status;}} /* Locks the FLASH program Erase Controller.*/flash_lock (); Rcc_hsicmd (DISABLE); Flash_status = Flash_write_ok;return flash_status;} /**---------------------------------------------------------------------------------* @brief Flash readout function * @param memory_data: Output storage address, n output number * @retval function has not been executed--------------------------------------------------------------------------------*/unsigned Char Flash_read (unsigned short int * memory_data,unsigned short int n) {count = 0;while (Count < N) {* (memory_data+count) = * (U16 *)   (0x8002000 + count*2);p rintf ("\ r%d \ r", * (Memory_data+count)); Read Count++;if (Count > N) {flash_status = Flash_read_no;return flash_status;}} Flash_erasepage (0x8002000); Flash_status = Flash_read_ok;return flash_status;} /*********************************************end of file**********************/

Stm32 Flash read/write [library function]