Date: Thu, 22 Jun 2006 15:50:18 -0500 From: Derek Ragona <derek@computinginnovations.com> To: "Andrew Falanga" <af300wsm@gmail.com>, freebsd-questions@freebsd.org Subject: Re: Serial programming on FreeBSD 6.0 RELEASE Message-ID: <6.0.0.22.2.20060622154002.02588490@mail.computinginnovations.com> In-Reply-To: <340a29540606221255xd82aa33qf0dc96b95cb0cb12@mail.gmail.com > References: <340a29540606220828i500905afq6d1ff81cf095cf88@mail.gmail.com> <6.0.0.22.2.20060622115945.02533de8@mail.computinginnovations.com> <340a29540606221119o16cab29ak5ae46156a3feca09@mail.gmail.com> <6.0.0.22.2.20060622132439.0253b160@mail.computinginnovations.com> <340a29540606221139w7b257b26j5c115c3976bd2927@mail.gmail.com> <6.0.0.22.2.20060622134310.02533080@mail.computinginnovations.com> <340a29540606221157s71e3fb15n4187b4329722fbab@mail.gmail.com> <6.0.0.22.2.20060622141710.0203b870@mail.computinginnovations.com> <340a29540606221255xd82aa33qf0dc96b95cb0cb12@mail.gmail.com>
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Let me try this again. Programing the uart directly means directly
manipulating the serial port chip. Programing in c or c++ does not usually
do this, as you normally would open the device/file and simply read or
write to it. In opening the device you need to set it to unbuffered in the
flags when you do the open call.
-Derek
At 02:55 PM 6/22/2006, Andrew Falanga wrote:
>I'm not sure I understand what you mean.
>
>Andy
>
>On 6/22/06, Derek Ragona
><<mailto:derek@computinginnovations.com>derek@computinginnovations.com > wrote:
>>Kermit may be manipulating the uart directly.
>>
>>Unless you are not getting the uart to flush the characters. I have only
>>had that problem with doing low-level direct programing. Typically not a
>>problem with high-level coding where you just open the device and set it
>>for non-buffered output.
>>
>>Your problem though may be in the stack overflows. You may need to
>>explicitly compile and link it with a larger stack. It may be these
>>overflows causing the output to never get there.
>>
>> -Derek
>>
>>
>>
>>At 01:57 PM 6/22/2006, Andrew Falanga wrote:
>>Unfortunately, it looks like getty isn't running on /dev/cuad1. I did
>>the ps command you suggest below and it apears that getty is only running
>>on the virtual terminals (ttyvx).
>>
>>Would you have any idea what it is that kermit is doing differently that I?
>>
>>Andy
>>
>>On 6/22/06, Derek Ragona
>><<mailto:derek@computinginnovations.com>derek@computinginnovations.com> wrote:
>>>I would do a
>>>ps -ax|more
>>>to see what is running.
>>>
>>>Depending on your version FreeBSD may not have enabled the getty in
>>>/etc/ttys
>>>
>>> -Derek
>>>
>>
>>
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