On Sat, 10 May 2008, osmicadu wrote:
> Hello,
>
> I have a question about AD converter on TS-7250.
>
> On my board I don't have a real time clock and the only adc I have is
> the 5 channel one that comes originally with the board. What I would
> like to do is to simply connect a sensor to my board which gives
> values from 0-3V and to convert it on one channel on my TS-7250 so
> that I can transport it through a network to my PC.
>
> Now is this possible whit out the real time clock on my board because
> I have to read the sensor same every 5 seconds. Also is it problematic
> to set it up on the 5 channel adc that originally comes with the board.
As far as I know, there's a RTC in the ep9302.
You don't need a RTC for timing though, that's done with timer interrupts
which basically count cpu cycles. If you want to timestamp your readings
but can't get the RTC to work, ntpd is your friend.
The ADC inputs read 0 to 3.3v and there are code examples at
ftp.embeddedarm.com
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