<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">2013/11/16 luke.leighton <span dir="ltr"><<a href="mailto:luke.leighton@gmail.com" target="_blank">luke.leighton@gmail.com</a>></span><br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div class="im">On Sat, Nov 16, 2013 at 8:22 PM, Henrik Nordström<br>
<<a href="mailto:henrik@henriknordstrom.net">henrik@henriknordstrom.net</a>> wrote:<br>
> lör 2013-11-16 klockan 13:23 +0000 skrev luke.leighton:<br>
>> <a href="https://www.sparkfun.com/tutorials/215" target="_blank">https://www.sparkfun.com/tutorials/215</a><br>
>><br>
>> in the end i went with this for the router, using an IMD2A for the two<br>
>> transistors.<br>
><br>
> Personally I haven't used RS232 in ages, only different "TTL" serial<br>
> variants of 5V or 3.3V.<br>
<br>
</div> yehh i have to be reaasonably compatible with RS232, as this is<br>
actually going to have a 9-pin header on it. although the only thing<br>
it will be connected to in most cases is one of those... yup, USB<br>
serial converters.<br></blockquote><div><br></div><div>Why don't we include a USB to TTL-Serial chip on the card and/or carrier. Just like Solid_run did/does with their CuBoxes.<br><br></div><div>Pro's: <br>- nobody need to have a RS-232 or TTL dongle. <br>
</div><div>- we can tune the usb-ttl chip to the SoC/MicroController<br></div><div>- No fiddeling with voltage levels outside the both<br>- USB-Interface are everyware<br></div><div>- USB has standardized cables<br></div>
<div>- USB ports are fixed. Doesn't get lost in the rubble.<br></div><div>- Amateur developers aren't required to invest in additional hardware to get started or helpout.<br></div><div><br>Con's<br></div><div>
- Extra space needed<br></div><div>- Extra chips / costs<br></div><div>- USB-TTL chips sometimes require drivers to operate.<br><br><a href="http://www.solid-run.com/mw/index.php/Serial_console">http://www.solid-run.com/mw/index.php/Serial_console</a><br>
<br></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<span class=""><font color="#888888"><br>
l.<br>
</font></span><div class=""><div class="h5"><br>
_______________________________________________<br>
arm-netbook mailing list <a href="mailto:arm-netbook@lists.phcomp.co.uk">arm-netbook@lists.phcomp.co.uk</a><br>
<a href="http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook" target="_blank">http://lists.phcomp.co.uk/mailman/listinfo/arm-netbook</a><br>
Send large attachments to <a href="mailto:arm-netbook@files.phcomp.co.uk">arm-netbook@files.phcomp.co.uk</a></div></div></blockquote></div><br></div></div>