Re: Working serial port.

I fired up agetty on the serial port and was able to login.  I got 
double echos on everything I typed, but I think that is a configuration 
issue on my terminal since the modem seemed to understand everything 
properly.

Patrick M

Bruce D. Lightner wrote:

> Patrick,
>
>> Ok, I've verified the functionality of Bruce's circuit, exluding the 
>> reset
>> part.  
>
>
> Good news!
>
> I'll order a $0.53 2.7V-trigger "reset supervisor" (e.g., 
> MCP120T-270I/TT) in an SOT-23 package and somehow "dead bug" it onto 
> the PCB that's coming.
>
>> As a side note, many manufacturers are now making single gate logic 
>> devices. See below for sigle gate inverters.
>>
>> http://focus.ti.com/docs/prod/folders/print/sn74lvc1gu04.html
>
>
> Thanks for the tip.  I like those SOT-23-5 packages.  Too bad we need 
> *two* inverters! :-)
>
> I was going to use tiny a TSSOP-14 package for the '04 hex inverter, 
> but I figured that the SOIC-14 is easier for most people to build 
> with.  That's also why I stuck to the 0805 surface mount resistors and 
> caps instead of the 0603's
>
> So, can I assume that you tested the "input" side of /dev/console by 
> doing something like a "login" to the Actiontec uClinux kernel?
>
> That's tests the IRQ logic, which I'd like to get right.
>
> Best regards,
>
> Bruce
>

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