Hi all

I am successfully setting up the RTC in an LPC925 but I would like to read the value of the RTC at an instant in time. While I assume that I can read the RTCH and RTCL registers, I can't find it documented as to where the 7bit prescaler for the RTC is stored.

As such how do I read the value?

What I wanted to do was use the RTC as another timer by capturing the value when I want to start timing and capture it again when I want to stop timing, then I have the time between 2 points. Is this feasible?


Here is how I set the RTC (I didn't want the interrupt - yes I realise that it may roll over while I am timing but I am just testing at the moment)
//Set the RTC up to Internal CLK (0x60) and Start it (0x01)
RTCH = 0xFF;
RTCL = 0xFF;
RTCCON = 0x61;

Thanks and Regards;
Marshall Brown