STM32F103C8T6 内部 FLASH读写_stm32f103c8t6读写内部flash

u16	people_id[50] = { 1, 2, 3 };    /* 假设公司最多50人 */
u16	people_clock_t[50];             /* 每个人签到次数 */
u16	people_num = 2;                 /* 人数 */


#define DEBUG
#define FLASH_SIZE 64                   /* 所选MCU的FLASH容量大小(单位为K) */
#if FLASH_SIZE < 256
#define SECTOR_SIZE 1024                /* 字节 */
#else
#define SECTOR_SIZE 2048                /* 字节 */
#endif
FLASH_Status Debug;
/* Flash 写函数 以8 bit 方式写入 */
void FLASH_WriteData( uint32_t startAddress, uint16_t *writeData, uint16_t countToWrite )
{
	uint16_t	i;
	uint32_t	offsetAddress;  /* 偏移地址 */
	uint32_t	sectorPosition; /* 扇区位置 */
	uint32_t	sectorStartAddress;
	if ( startAddress < FLASH_BASE || ( (startAddress + countToWrite) >= (FLASH_BASE + 1024 * FLASH_SIZE) ) )
	{
		return;                 /* 非法地址 */
	}
	/* 解锁写保护 */
	FLASH_Unlock();

	/* 计算去掉0X08000000后的实际偏移地址 */
	offsetAddress = startAddress - FLASH_BASE;
	/* 计算扇区地址 */
	sectorPosition = offsetAddress / SECTOR_SIZE;
	/* 对应扇区的首地址 */
	sectorStartAddress = sectorPosition * SECTOR_SIZE + FLASH_BASE;

	FLASH_ClearFlag( FLASH_FLAG_EOP | FLASH_FLAG_PGERR | FLASH_FLAG_WRPRTERR );

	/* 擦除这个扇区 */
	Debug = FLASH_ErasePage( sectorStartAddress );
#ifdef DEBUG
	if ( Debug != FLASH_COMPLETE )
		printf( "扇区擦除失败\n\n" );
#endif
	for ( i = 0; i < countToWrite; i++ )
	{
		Debug = FLASH_ProgramHalfWord( startAddress, writeData[i] );
#ifdef DEBUG
		if ( Debug != FLASH_COMPLETE )
			printf( "扇区写失败\n\n" );
#endif
		startAddress = startAddress + 2;
	}
	FLASH_Lock(); /*上锁写保护 */
}


u16 STMFLASH_ReadHalfWord( u32 faddr )
{
	return(*(vu16 *) faddr);
}


/* 16位数据读取 */
void FLASH_ReadMoreData( u32 ReadAddr, u16 *pBuffer, u16 NumToRead )
{
	u16 i;
	for ( i = 0; i < NumToRead; i++ )
	{
		pBuffer[i]	= STMFLASH_ReadHalfWord( ReadAddr );    /* 读取2个字节. */
		ReadAddr	+= 2;                                   /* 偏移2个字节. */
	}
}


void write_to_flash( void )
{
	u16	shuju[102];
	u16	c = 0;
	memset( shuju, 0, sizeof(shuju) );
	for ( c = 0; c < 50; c++ )
	{
		shuju[c] = people_id[c];                /*复制 */
	}
	for ( c = 0; c < 50; c++ )
	{
		shuju[50 + c] = people_clock_t[c];      /*复制 */
	}
	shuju[100] = people_num;


	FLASH_WriteData( 0x08004000, shuju, 101 );      /* 写入 */
}


void read_from_flash( void )
{
	u16	shuju[102];
	u16	c = 0;

	memset( shuju, 0, sizeof(shuju) );
	FLASH_ReadMoreData( 0x08004000, shuju, 101 );


	for ( c = 0; c < 50; c++ )
	{
		people_id[c] = shuju[c];                /* 读取 */
	}
	for ( c = 0; c < 50; c++ )
	{
		people_clock_t[c] = shuju[50 + c];      /*复制 */
	}
	people_num = shuju[100];
}



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main

void main(void)
{
     write_to_flash();
	read_from_flash();
    while(1)
    {

    }
}

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