/**
* @brief Disables the write protection of user desired pages
* @param None
* @retval 0: Write Protection successfully disabled
* 1: Error: Flash write unprotection failed
* 2: Flash memory is not write protected
*/
uint32_t FLASH_If_DisableWriteProtection(void)
{
uint32_t UserMemoryMask = 0, WRPR = 0;
FLASH_Status status = FLASH_BUSY;
/* Clear all FLASH flags */
FLASH_ClearFlag(FLASH_FLAG_EOP | FLASH_FLAG_WRPERR | FLASH_FLAG_PGERR | FLASH_FLAG_BSY);
/* Get Write protection */
WRPR = FLASH_OB_GetWRP();
/* Test if user memory is write protected */
if (FLASH_If_GetWriteProtectionStatus() != 0x00)
{
/* Enable the FLASH option byte access */
FLASH_OB_Unlock();
/* Erase option bytes */
status = FLASH_OB_Erase();
/* Compute the User_Mask */
UserMemoryMask = FLASH_PROTECTED_PAGES | WRPR;
if (UserMemoryMask != 0xFFFFFFFF)
{
/* Disable Write protection */
status = FLASH_OB_EnableWRP((uint32_t)~UserMemoryMask);
}
if (status == FLASH_COMPLETE)
{
/* Write Protection successfully disabled */
return (0);
}
else
{
/* Error: Flash write unprotection failed */
return (1);
}
}
else
{
/* Flash memory is not write protected */
return(2);
}
}
/**
* @brief Display the Main Menu on HyperTerminal
* @param None
* @retval None
*/
void Main_Menu(void)
{
uint8_t key = 0;
Serial_PutString((uint8_t *)"\r\n======================================================================");
Serial_PutString((uint8_t *)"\r\n= (C) COPYRIGHT 2015 STMicroelectronics =");
Serial_PutString((uint8_t *)"\r\n= =");
Serial_PutString((uint8_t *)"\r\n= STM32F1xx In-Application Programming Application (Version 1.0.0) =");
Serial_PutString((uint8_t *)"\r\n= =");
Serial_PutString((uint8_t *)"\r\n= By MCD Application Team =");
Serial_PutString((uint8_t *)"\r\n======================================================================");
Serial_PutString((uint8_t *)"\r\n\r\n");
/* Test if any sector of Flash memory where user application will be loaded is write protected */
FlashProtection = FLASH_If_GetWriteProtectionStatus();
while (1)
{
Serial_PutString((uint8_t *)"\r\n=================== Main Menu ============================\r\n\n");
Serial_PutString((uint8_t *)" Download image to the internal Flash ----------------- 1\r\n\n");
Serial_PutString((uint8_t *)" Upload image from the internal Flash ----------------- 2\r\n\n");
Serial_PutString((uint8_t *)" Execute the loaded application ----------------------- 3\r\n\n");
if(FlashProtection != FLASHIF_PROTECTION_NONE)
{
Serial_PutString((uint8_t *)" Disable the write protection ------------------------- 4\r\n\n");
}
else
{
Serial_PutString((uint8_t *)" Enable the write protection -------------------------- 4\r\n\n");
}
Serial_PutString((uint8_t *)"==========================================================\r\n\n");
/* Clean the input path */
__HAL_UART_FLUSH_DRREGISTER(&UartHandle);
/* Receive key */
HAL_UART_Receive(&UartHandle, &key, 1, RX_TIMEOUT);
switch (key)
{
case '1' :
/* Download user application in the Flash */
SerialDownload();
break;
case '2' :
/* Upload user application from the Flash */
SerialUpload();
break;
case '3' :
Serial_PutString((uint8_t *)"Start program execution......\r\n\n");
/* execute the new program */
JumpAddress = *(__IO uint32_t*) (APPLICATION_ADDRESS + 4);
/* Jump to user application */
JumpToApplication = (pFunction) JumpAddress;
/* Initialize user application's Stack Pointer */
__set_MSP(*(__IO uint32_t*) APPLICATION_ADDRESS);
JumpToApplication();
break;
case '4' :
if (FlashProtection != FLASHIF_PROTECTION_NONE)
{
/* Disable the write protection */
if (FLASH_If_WriteProtectionConfig(FLASHIF_WRP_DISABLE) == FLASHIF_OK)
{
Serial_PutString((uint8_t *)"Write Protection disabled...\r\n");
Serial_PutString((uint8_t *)"System will now restart...\r\n");
/* Launch the option byte loading */
HAL_FLASH_OB_Launch();
}
else
{
Serial_PutString((uint8_t *)"Error: Flash write un-protection failed...\r\n");
}
}
else
{
if (FLASH_If_WriteProtectionConfig(FLASHIF_WRP_ENABLE) == FLASHIF_OK)
{
Serial_PutString((uint8_t *)"Write Protection enabled...\r\n");
Serial_PutString((uint8_t *)"System will now restart...\r\n");
/* Launch the option byte loading */
HAL_FLASH_OB_Launch();
}
else
{
Serial_PutString((uint8_t *)"Error: Flash write protection failed...\r\n");
}
}
break;
default:
Serial_PutString((uint8_t *)"Invalid Number ! ==> The number should be either 1, 2, 3 or 4\r");
break;
}
}
}
/**
* @brief Display the Main Menu on HyperTerminal
* @param None
* @retval None
*/
void Main_Menu(void)
{
uint8_t key = 0;
SerialPutString("\r\n======================================================================");
SerialPutString("\r\n= (C) COPYRIGHT 2011 STMicroelectronics =");
SerialPutString("\r\n= =");
SerialPutString("\r\n= STM32F4xx In-Application Programming Application (Version 1.0.0) =");
SerialPutString("\r\n= =");
SerialPutString("\r\n= By MCD Application Team =");
SerialPutString("\r\n======================================================================");
SerialPutString("\r\n\r\n");
/* Test if any sector of Flash memory where user application will be loaded is write protected */
if (FLASH_If_GetWriteProtectionStatus() == 0)
{
FlashProtection = 1;
}
else
{
FlashProtection = 0;
}
while (1)
{
SerialPutString("\r\n================== Main Menu ============================\r\n\n");
SerialPutString(" Download Image To the STM32F4xx Internal Flash ------- 1\r\n\n");
SerialPutString(" Upload Image From the STM32F4xx Internal Flash ------- 2\r\n\n");
SerialPutString(" Execute The New Program ------------------------------ 3\r\n\n");
if(FlashProtection != 0)
{
SerialPutString(" Disable the write protection ------------------------- 4\r\n\n");
}
SerialPutString("==========================================================\r\n\n");
/* Receive key */
key = GetKey();
if (key == 0x31)
{
/* Download user application in the Flash */
SerialDownload();
}
else if (key == 0x32)
{
/* Upload user application from the Flash */
SerialUpload();
}
else if (key == 0x33) /* execute the new program */
{
JumpAddress = *(__IO uint32_t*) (APPLICATION_ADDRESS + 4);
/* Jump to user application */
Jump_To_Application = (pFunction) JumpAddress;
/* Initialize user application's Stack Pointer */
__set_MSP(*(__IO uint32_t*) APPLICATION_ADDRESS);
Jump_To_Application();
}
else if ((key == 0x34) && (FlashProtection == 1))
{
/* Disable the write protection */
switch (FLASH_If_DisableWriteProtection())
{
case 1:
{
SerialPutString("Write Protection disabled...\r\n");
FlashProtection = 0;
break;
}
case 2:
{
SerialPutString("Error: Flash write unprotection failed...\r\n");
break;
}
default:
{
}
}
}
else
{
if (FlashProtection == 0)
{
SerialPutString("Invalid Number ! ==> The number should be either 1, 2 or 3\r");
}
else
{
SerialPutString("Invalid Number ! ==> The number should be either 1, 2, 3 or 4\r");
}
}
}
}
