STM8S EEPROM 操作
2024-10-21 03:39:52
STM8S 内置EEPROM,对于非常大须要带记忆的产品来说,是个非常好的资源,下面是我个人摸索出来的,而且验证OK,大家如须要可放心使用。
#define EEPROMADDR0X000 ((u32)(FLASH_DATA_START_PHYSICAL_ADDRESS))
#define EEPROMADDR0X001 ((u32)(FLASH_DATA_START_PHYSICAL_ADDRESS+1))
#define EEPROMADDR0X002 ((u32)(FLASH_DATA_START_PHYSICAL_ADDRESS+2))
#define EEPROMADDR0X003 ((u32)(FLASH_DATA_START_PHYSICAL_ADDRESS+3)) void FLASH_Unlock(FLASH_MemType_TypeDef MemType)
{
/* Check parameter */
assert_param(IS_MEMORY_TYPE_OK(MemType)); /* Unlock program memory */
if (MemType == FLASH_MEMTYPE_PROG)
{
FLASH->PUKR = FLASH_RASS_KEY1;
FLASH->PUKR = FLASH_RASS_KEY2;
} /* Unlock data memory */
else
{
FLASH->DUKR = FLASH_RASS_KEY2; /* Warning: keys are reversed on data memory !!! */
FLASH->DUKR = FLASH_RASS_KEY1;
}
} void FLASH_DeInit(void)
{
u8 temp = 0;
FLASH->CR1 = FLASH_CR1_RESET_VALUE;
FLASH->CR2 = FLASH_CR2_RESET_VALUE;
FLASH->NCR2 = FLASH_NCR2_RESET_VALUE;
FLASH->IAPSR &= (u8)(~FLASH_IAPSR_DUL);
FLASH->IAPSR &= (u8)(~FLASH_IAPSR_PUL);
temp = FLASH->IAPSR;
/* Reading of this register causes the clearing of status flags */
} void FLASH_ProgramByte(u32 Address, u8 Data)
{
/* Check parameters */
assert_param(IS_FLASH_ADDRESS_OK(Address));
*((PointerAttr u8*) Address) = Data;
} u8 FLASH_ReadByte(u32 Address)
{
/* Check parameter */
assert_param(IS_FLASH_ADDRESS_OK(Address));
return(*((PointerAttr u8*) Address)); /* Read byte */ } FLASH_Unlock(FLASH_MEMTYPE_DATA);//解密EEPROM 可编程
FLASH_DeInit();//EEPROM寄存器复位 FLASH_Unlock(FLASH_MEMTYPE_DATA);//解密EEPROM 可读写数据
FLASH_ProgramByte(EEPROMADDR0X000,0X25);//在首地址写入数据0x25
FLASH_ReadByte(EEPROMADDR0X000);//将首地址的数据读出来
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