STM32G070 software reset issue

[aravindpv]

I was doing reset through SPI command and expected results are not happening.

 

this is the line i was expecting to reset the MCU

SCB->AIRCR = (NVIC_AIRCR_VECTKEY | (SCB->AIRCR & (0x700)) | (1 << NVIC_SYSRESETREQ));

where

#define NVIC_AIRCR_VECTKEY (0x05FA << 16)

#define NVIC_SYSRESETREQ 2

also my watchdog is running and expected to reset the system.
code snippet

 

FLASH_Unlock();
FLASH_ErasePage(0x08013000);
FLASH_ProgramWord(0x08013000, (uint64_t)0x0000000000000000ULL);
FLASH_Lock();

FLASH_Unlock();
FLASH_ErasePage(0x08013008);
FLASH_Lock();

SCB->AIRCR = (NVIC_AIRCR_VECTKEY | (SCB->AIRCR & (0x700)) | (1 << NVIC_SYSRESETREQ));
__DSB();

while (1);

 

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Edited to apply proper source code formatting - please see How to insert source code for future reference.

[Andrew Neil]

Please give some more details - see: How to write your question to maximize your chances to find a solution

 

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@aravindpv wrote:

I was doing reset through SPI command and expected results are not happening..

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So what, exactly, were you expecting to happen ?

What, exactly, is actually happening ?

What investigation/testing/debugging have you done to find the issue?

 

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@aravindpv wrote:

this is the line i was expecting to reset the MCU.

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Is that line ever executed?

Does it work without all the Flash stuff?

Without the SPI?

[aravindpv]

i was running a bootloader + main app setup on mcu where i expecting a particular command over SPI to capture one of my else condition and which is properly triggering. And on that condition i have added a reset line like mentioned above which is not happening or code executing but stuck at somewhere that kind of result I am getting. Actually my plan was to reset the mcu and set to start from 0x08000000 were my bootloader lies.

[Andrew Neil]

You didn't answer whether your reset line is ever getting executed?

 

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@aravindpv wrote:

 i have added a reset line like mentioned above .

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What do you mean, "like" ?

 

Why is that line doing a read-modify-write on SCB->AIRCR ?

Shouldn't it be just a write?

 

[mƎALLEm]

Hello,

Why complicate things to yourself? and why simply you don't use HAL_NVIC_SystemReset() to reset your MCU? You're already using HAL with the flash based on your shared code!

[TDK]

If HAL_NVIC_SystemReset doesn't reset the chip perhaps you have NRST tied high. Can't think of any other reason for it not working.

> But after reset, the RPi no longer sees the slave at 0x30

So it is resetting just not doing what you expect after reset?

[TDK]

This looks like AI generated code with the comments. Maybe stick to the working HAL implementations to modify flash.