Re: CE Development Time

My guess is, no, no one can give you a real estimate of how hard it is, at
least as far as achieving the performance specifications you've given. If
you are using off-the-shelf hardware that comes with a Windows CE board
support package, then you can concentrate on just doing the specific things
that you mention. If you don't have a board support package for the
hardware, it will take months to generate one yourself.

My guess is that the "continuous" nature of things is going to be the
problem. You might do some quick simulations and verify that you can get 4
frames per second in a reasonable way to the display, since that doesn't
require any of the harder stuff, while sending the same data to the SD card.
If you already have your touch screen, you could verify that handling those
interrupts doesn't interfere with the display or logging operations.

Actually generating an operating system based on a pre-existing BSP is not
difficult at all and you can download and play with the evaluation copy of
CE6 and the BSP by just visiting www.microsoft.com/downloads and looking for
it (Platform Builder is a good string to search on). If your BSP is good, I
would expect that you'd have a more-or-less working OS running on the device
and able to do everything except gather the data via USB in a week or two.
Then comes the effort to get the data from your USB device. Since you don't
say what it is, I'll assume that it's an oscilloscope device. If that's the
case, you'll have to find or write a driver for it that Windows CE can use.
If it's a device you designed, this will take maybe a month to get
reasonably working and reliable. If you're buying the device and there's no
Windows CE driver for it, you won't succeed in a reasonable period of time
and may need to rethink how you're going to get the data.

So, in maybe six to ten weeks, anyway, you should have a system that you can
evaluate end-to-end for performance and repeatability (you don't want the
user to touch the screen and have the data acquisition slow way down or
something). Then, we're totally off the map. What if you can't get the
data fast enough via USB? What if the display driver isn't optimized enough
to do what you need it to? What if the SD card hardware competes directly
for bus bandwidth with one of the other hardware devices? Is your display a
'standard' size and shape (320x240, 640x480)? If not, many of the system
dialogs in the OS won't fit properly and you may need to redesign them for
your display.

After that, I'd figure eight to twelve weeks to actually validate and fix
the OS and your application for a first release to the market. So, what
does that add up to? 18 to 26 weeks? I would think that you might be able
to achieve that.

Paul T.

"SB" <SB@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:1327D574-21BC-4504-9236-F238CDEF77E2@xxxxxxxxxxxxxxxx
I am new in CE. Now we are trying to understand the scope of the work
involved in the development of window CE system. We are targeting
TRITON-TX27
with iMX27 from Direct Insight to use for the system:

The system will receive a continuous stream of data through USB port and
displays the data on TFT LCD @ 4 frames per second rate. It would like a
continuos sine wave on the screen. It will also store the data in SD card
at
the same rate as LCD.

In addition, the system will have capability of taking using inputs which
could be using touch screen or hardware interrupts.

Can anyone give me some idea how challenging it would be for a new bee. I
would appreciate it very much if any one can tell me any time frame that
may
take to implement for an CE expert.

Sankar


.

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