/*******************************************************************************
* Function Name : FLASH_DisableWriteProtectionPages
* Description : Disable the write protection of desired pages
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void FLASH_DisableWriteProtectionPages(void)
{
u32 useroptionbyte = 0, WRPR = 0;
u16 var1 = OB_IWDG_SW, var2 = OB_STOP_NoRST, var3 = OB_STDBY_NoRST;
FLASH_Status status = FLASH_BUSY;
WRPR = FLASH_GetWriteProtectionOptionByte();
/* Test if user memory is write protected */
if ((WRPR & UserMemoryMask) != UserMemoryMask){
useroptionbyte = FLASH_GetUserOptionByte();
UserMemoryMask |= WRPR;
status = FLASH_EraseOptionBytes();
if(UserMemoryMask != 0xFFFFFFFF){
status = FLASH_EnableWriteProtection((u32)~UserMemoryMask);
}
/* Test if user Option Bytes are programmed */
if((useroptionbyte & 0x07) != 0x07){ /* Restore user Option Bytes */
if((useroptionbyte & 0x01) == 0x0){
var1 = OB_IWDG_HW;
}
if((useroptionbyte & 0x02) == 0x0){
var2 = OB_STOP_RST;
}
if((useroptionbyte & 0x04) == 0x0){
var3 = OB_STDBY_RST;
}
FLASH_UserOptionByteConfig(var1, var2, var3);
}
if (status == FLASH_COMPLETE){
SerialPutString("Write Protection disabled...\r\n");
SerialPutString("...and a System Reset will be generated to re-load the new option bytes\r\n");
/* Enable WWDG clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_WWDG, ENABLE);
/* Generate a system Reset to re-load the new option bytes: enable WWDG and set
counter value to 0x4F, as T6 bit is cleared this will generate a WWDG reset */
WWDG_Enable(0x4F);
}else{
SerialPutString("Error: Flash write unprotection failed...\r\n");
}
}else{
SerialPutString("Flash memory not write protected\r\n");
}
}
/**
* @brief Disable the write protection of desired pages
* @param None
* @retval None
*/
void FLASH_DisableWriteProtectionPages(void)
{
uint32_t useroptionbyte = 0, WRPR = 0;
uint16_t var1 = OB_IWDG_SW, var2 = OB_STOP_NoRST, var3 = OB_STDBY_NoRST;
FLASH_Status status = FLASH_BUSY;
WRPR = FLASH_GetWriteProtectionOptionByte();
/* Test if user memory is write protected */
if ((WRPR & UserMemoryMask) != UserMemoryMask)
{
useroptionbyte = FLASH_GetUserOptionByte();
UserMemoryMask |= WRPR;
status = FLASH_EraseOptionBytes();
if (UserMemoryMask != 0xFFFFFFFF)
{
status = FLASH_EnableWriteProtection((uint32_t)~UserMemoryMask);
}
/* Test if user Option Bytes are programmed */
if ((useroptionbyte & 0x07) != 0x07)
{
/* Restore user Option Bytes */
if ((useroptionbyte & 0x01) == 0x0)
{
var1 = OB_IWDG_HW;
}
if ((useroptionbyte & 0x02) == 0x0)
{
var2 = OB_STOP_RST;
}
if ((useroptionbyte & 0x04) == 0x0)
{
var3 = OB_STDBY_RST;
}
FLASH_UserOptionByteConfig(var1, var2, var3);
}
if (status == FLASH_COMPLETE)
{
SerialPutString("Write Protection disabled...\r\n");
SerialPutString("...and a System Reset will be generated to re-load the new option bytes\r\n");
/* Generate System Reset to load the new option byte values */
NVIC_SystemReset();
}
else
{
SerialPutString("Error: Flash write unprotection failed...\r\n");
}
}
else
{
SerialPutString("Flash memory not write protected\r\n");
}
}
