How to use Programmable Voltage Detect?

Posted on January 30, 2009 at 19:21

This topic has been closed for replies.

bruceAuthor

Associate III

Posted on May 17, 2011 at 13:01

Figured it out. The following code enables it (I hadn't enabled the PWR peripheral).

RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR , ENABLE);

PWR_PVDCmd(ENABLE);

PWR_PVDLevelConfig(PWR_PVDLevel_2V8);

And you can read the status with this:

PWR_GetFlagStatus(PWR_FLAG_PVDO);

After a cursory check, seems to work well.

bruceAuthor

Associate III

Posted on May 17, 2011 at 13:01

I also haven't been able to get it to work. It looks easy, the functions in the function library seem straightforward, but it doesn't work.

As the function library suggests, I use the following 2 commands to enable it. Both are supposed to write into the PWR_CR register.

PWR_PVDCmd(ENABLE);

PWR_PVDLevelConfig(PWR_PVDLevel_2V8);

If I read the register (0x70004000) after these commands, it still shows 0.

It's as if the register is somehow write protected.

And of course the PVDO bit in the PWR_CSR register never flips, no matter how the register is set. 0x70004000

If anyone has gotten this feature to work, please let us know.

Thanks

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