STM32F7 read out protection hangs out
Hi,
I'm implementing the read out protection for the F746 controller.
Changing it from level0 to level1 at the first start from my code.
First I realised that the level1 was setted but not saved after a power cycle. Then I realised that the HAL_libraries had an error
by modifying the OPTCR register. Because the level was writen to the first byte address of the register and not the second one. I solved this by just replacing the HAL_libraries with the new ones (V1.1.0 / 22-April-2016) .Now it works. The problem is that it hangs out after setting the OPTSTRT bit in OPTCR register.
After a power cycle the level is set to 1.
My problem is that even if I do a system reset by calling NVIC_SystemReset() after HAL_FLASH_OB_Launch() I will never get there since my code was interrupted and does not come back.
This is the content of my stack by the error:
0xfffffffe
<signal handler called>() at
0xfffffff1
UART5_IRQHandler() at uart.c:
1.885
0x8000a10
<signal handler called>() at
0xfffffff9
OS_GetTime_ms() at OS.c:
179
0x80053a6
HAL_FLASH_WaitForLastOperation() at flash.c:
123
0x8001784
HAL_FLASH_OB_Launch() at flash.c:
123
0x8001984
FLASH_SetReadProtectionL1() at flash.c:
458
0x8001c28
SerialCmd_Test() at commandlib.c:
90
0x8003608
main() at main.c:
163
0x80056f8The content of my function FLASH_SetReadProtectionL1() is this:
HAL_StatusTypeDef FLASH_SetReadProtectionL1(
void
){
HAL_StatusTypeDef status = HAL_ERROR;
HAL_FLASH_Unlock();
HAL_FLASH_OB_Unlock();
status = HAL_FLASH_OB_RDP_LevelConfig(OB_RDP_LEVEL_1);
if
(status == HAL_OK){
status = HAL_FLASH_OB_Launch();
}
// not working since HAL_FLASH_OB_Launch() does not return
//NVIC_SystemReset()
HAL_FLASH_OB_Lock();
HAL_FLASH_Lock();
return
status;
}does any one has an idea why this is happening?
Best regartds
dev.
#stm32f7-read-protection-rdp