Re: [ts-7000] Re: Thoughts on the new TS-7400 board

["Don W. Carr" <>]

For me, the best thing you could add is two high speed counters, and extra serial ports. I have a project that needs 5 serial ports, 2 high speed counters, and some DIO, and this little board would be perfect if we could do that. By the way, we really like the way you count transitions instead of cycles since that cuts the error for frequency calculations in half! We would even be willing to pay for the mods. 

I like the XDIO, but I think it would be better if you could still use the other DIO when the counters are used, and also you need a longer register for the PWM high/low times so we can hit all frequencies +/-0.05%
 duty cycle.

When will you have a case? We would like room for a signal conditioning board in the case like you have with your other cases.

We like the looks of this little new board!!

Don.

On 9/9/06, Jesse Off <> wrote:

> - Don't know why the TS-9441 need the power components. It seems to
send
> precision 2.5V and 0.833V postentials to the controllers analog to
digital
> pins. Maybe this is to calibrate each controller's ADC ? It doesn't
seem to
> be bowering the TS-7400

Exactly. The 9441 is used to test and calibrate the ADC and DIO.

> - Many of the controllers GPIOs are used for the optional RTC, and
are not
> brought out to the 40-pin connector. You need to use the 20 DIOs
from the
> CPLD that connect to the 40-pin adapter.

The RTC uses GPIO's of the processor, not the CPLD. There are 20
DIOs on the CPLD that are for the user. These are 3.3V schmitt
trigger inputs, LVCMOS outputs.

>
> - The board looks like it has an unpopulated region that could hold
a
> switching regulator (maybe for efficiency, or battery operations,
etc), but I
> can't find this as a purchase option.

Its indeed a switching regulator. Our first batch of boards won't
have this option populated-- but eventually the option will show up.

Some other unique things about the TS-7400:

* Hardware accelerated NAND flash controller on the CPLD. We now do
hardware ECC and can also do DMA transfers (though Linux's MTD layer
doesn't seem to allow us to exploit this easily in MTD drivers).

* The boards boot to NAND flash without using RedBoot and we've used
a bootstrap setup very similar to the TS7300 allowing bootup to a
Linux shell prompt in about 1.3 seconds.

* We don't have it up yet since we're waiting on some custom metal
before taking pictures, but there will be integrated 802.11g with
external antenna jack on the (very small!) extruded aluminum
enclosure. We have a very small daughtercard we're using for this.

The CPLD/FPGA on the TS7400 currently has some space leftover that
we're thinking of creating multiple loads for similar to the TS-7260
(XDIO, SD, 5UARTS, etc..) If anybody has some suggestions for extra
simple DIO-like functionality such as quadrature channels, PWM,
timers, frequency counters, etc, that would be useful give me a call
480-837-5200 or send an email!

//Jesse Off

-- 
Dr. Don W. Carr
J. G. Montenegro 2258
Guadalajara, Mexico
+52-333-630-0704
+52-333-836-4500 ext 2930

__._,_.___

SPONSORED LINKS

Single board computer	Hardware	Computer running slow
Linux os	Single board

Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: =Email Delivery: Digest | m("yahoogroups.com?subject","ts-7000-fullfeatured");=Change Delivery Format: Fully Featured">Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | =Unsubscribe

__,_._,___