MCU restart freeze problem help

zhangliyuan

MCU restart freeze problem help [Copy link]

Now, there is a problem that occasionally occurs during the use of STM32F429, that is, the system freezes when restarting. This problem will occur whether it is pressing the RESET button, soft restarting the program, or power-off restarting. It does not occur every time, but occasionally. After it occurs, the program must be re-burned to return to normal. It is not clear whether the freeze is caused by the program not starting or because the program ran away. My BOOT0 and BOOT1 are both 0. Have the majority of netizens encountered this problem? What is the solution?

littleshrimp

What microcontroller is this? Is there any operation to erase or write FLASH in the program?

zhangliyuan

littleshrimp posted on 2021-3-6 15:22 What microcontroller is this? Is there any operation to erase or write FLASH in the program?

This situation occurs in both STM32F429VET6 and STM32F429IGT6. There are operations of erasing and writing FLASH in the program, but there are no operations of erasing and writing FLASH during RESET and power-off restart.

zxopenlyt

MCU restart freeze problem help

zhangliyuan

zxopenlyt posted on 2021-3-6 15:39 MCU restart freeze problem help

Have you encountered this situation as well?

littleshrimp

zhangliyuan posted on 2021-3-6 15:38 This situation occurred on both STM32F429VET6 and STM32F429IGT6. The program contains operations of erasing and writing FLASH, but during RESET and power-off restart...

The FLASH data is likely to be erased

If the system can run normally without erasing and writing FLASH, try to temporarily block these codes and see if it works normally.

You can also read out the FLASH data after a problem occurs and compare it with the original data to see if there are any changes.

qwqwqw2088

littleshrimp posted on 2021-3-6 15:50 It is very likely that the FLASH data has been erased. If the erase and write FLASH operations can be removed and the system can run normally, try to temporarily block these codes and try...

FLASH data is erased,

In this case, is it because the code operates the FLASH improperly or is it automatically erased? Why does this happen?

freebsder

After the computer crashes, use the debugger to export the flash bin and compare it with the original bin to see if the flash has really been tampered with.

littleshrimp

qwqwqw2088 posted on 2021-3-6 21:11 The FLASH data is erased. In this case, is it because the code operates the FLASH improperly or is it automatically erased? Why does this happen?

If it is confirmed that it has been erased, it is usually because of code logic problems or external factors that caused the program to run away and execute code that should not be executed.

w494143467

It is very likely that the Flash data was erased incorrectly.