STM32F103C8T6 内部 FLASH读写

只看该作者 · 2021-7-5 16:29

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 */
}

只看该作者 · 2021-7-5 16:30

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. */
}
}

只看该作者 · 2021-7-5 16:31

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 */
}

只看该作者 · 2021-7-5 16:32

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];
}

只看该作者 · 2021-7-5 16:32

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

}
}

只看该作者 · 2021-7-5 21:13

搞个外部flash吧