Re: Change CPU frequency from WinCE (not bootloader)

In theory, yes. You can just map in the registers and write to them to
change speeds. In practice it could be much more difficult. You'd need to
make sure your device supported that speed (core voltages, etc) and some
peripherals need to be handled carefully during the transition. There is no
standard APIs that do this switch for you, you're on your own.

--
Dean Ramsier - eMVP
Vibren Technologies
http://www.vibren.com/Products/schema_bsp.htm


"Andriy Hyba" <nospam@xxxxxxxxxx> wrote in message
news:up0NBJsYFHA.1368@xxxxxxxxxxxxxxxxxxxxxxx
> Hi all,
>
> In my bootloader CPU frequency is configured to 200MHz and it is no way to
> upgrade.
>
> Is it possible to change the frequency to 400MHz later, from the OS?
>
> WinCE 4.2, Platform based on Intel PXA 250
>
> Startup banner:
> *******Beginning System Initialization*******
> SDCLK[1] = MemClk
> MemClk = 99.53 MHz
> Run Mode = 2 * MemClk
> Turbo Mode = Run Mode
> Mode: RUN
>
>
> --
> Thanks,
> Andriy Hyba
>
>


.