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Implementing Watchdog on stm32f030
Posted: Wed Sep 30, 2020 8:19 am
by Alkaline
Hello
I would like to implement an independent watchdog within my program.
I tried to follow some examples on the internet but I couldn't get it to work (probably due to my inexperience)
Is it possible to post an example of how to configure it?
Kind regards
Re: Implementing Watchdog on stm32f030
Posted: Thu Oct 01, 2020 4:30 pm
by LeighM
Here is an example based on the datasheet.
I've not tested it though.
Drop this code into a C icon to initialise the watchdog.
Then repeat step 6, the last line of code, at regular intervals to avoid reset.
Code: Select all
// 1. Enable the IWDG by writing 0x0000 CCCC in the IWDG_KR register.
IWDG->KR = 0xCCCC;
// 2. Enable register access by writing 0x0000 5555 in the IWDG_KR register.
IWDG->KR = 0x5555;
// 3. Write the IWDG prescaler by programming IWDG_PR from 0 to 7.
IWDG->PR = 7;
// 4. Write the reload register (IWDG_RLR).
IWDG->RLR = 0xFFF;
// 5. Wait for the registers to be updated (IWDG_SR = 0x0000 0000).
while (IWDG->SR);
// 6. Refresh the counter value with IWDG_RLR (IWDG_KR = 0x0000 AAAA)
IWDG->KR = 0xAAAA;
Re: Implementing Watchdog on stm32f030
Posted: Thu Oct 01, 2020 5:06 pm
by Alkaline
Hi LeighM
Thank you for the example
As soon as I try it I'll let you know!
Regards