stm32 Flash读写独立函数[库函数]

一. stm32的FLASH分为1.主存储块：用于保存具体的程序代码和用户数据，主存储块是以页为单位划分的，　　　　　　一页大小为1KB。范围为从地址0x08000000开始的128KB内。2.信息块   ：用于负责由stm32出厂是放置2KB的启动程序（Bootloader）和512B的用户配置信息区二.操作原则对Flash 的写入操作要 “先擦除后写入”的原则； stm32的内置flash 编程操作都是以页为单位写入的，而写入的操作必须要以16位半字宽度数据位单位，允许跨页写，写入非16位数据时将导致stm32内部总线错误。进行内置flash读写时，必须要打开内部Rc振荡器。

头文件：

#ifndef __BSP_FLASH_H
#define    __BSP_FLASH_H
#include "stm32f10x.h"typedef enum {
    FLASH_WRITE_OK = ,
    FLASH_WRIKE_NO = ,
    FLASH_READ_OK = ,
    FLASH_READ_NO =
}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 */

读写函数：

#include "bsp_flash.h"   FLASH_FLAG FLASH_STATUS;
static u32 count = ;
/**---------------------------------------------------------------------------------
  * @brief   FLASH写入必不可少步骤
  * @param  输入数据起始地址
  * @retval 函数有无执行完毕
  --------------------------------------------------------------------------------*/unsigned char FLASH_WRITE(unsigned short int * memory_data)
{
    static int t;
    count = ;
    /*Enables or disables the Internal High Speed oscillator (HSI).*/
    RCC_HSICmd(ENABLE);
    /*打开FLASH可擦除控制器*/
    FLASH_Unlock();
    /*将flash三个标志位全清*/
    FLASH_ClearFlag(FLASH_FLAG_EOP|FLASH_FLAG_PGERR|FLASH_FLAG_WRPRTERR);
    FLASH_ErasePage(0x8002000);
    t = sizeof((const char *)memory_data);
    while(count <= t)
    {
        /*flash 为一个字节存储，16位数据必须地址加2*/
        FLASH_ProgramHalfWord((0x8002000 +count*),*(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读出函数
  * @param  memory_data：输出存放地址，n 输出个数
  * @retval 函数有无执行完毕
  --------------------------------------------------------------------------------*/
unsigned char FLASH_READ(unsigned short int * memory_data,unsigned short int n)
{
    count = ;
    while(count < n)
    {
      *(memory_data+count) = *(u16 *)(0x8002000 + count*);
        printf("\r %d \r",*(memory_data+count));   //读取
        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**********************/