On May 24 2007 12:45, Lars K.W. Gohlke wrote:
>Date: Thu, 24 May 2007 12:45:06 +0200
>From: Lars K.W. Gohlke <[email protected]>
>To: Jan Engelhardt <[email protected]>
>Cc: Tilman Schmidt <[email protected]>, [email protected]
>Subject: Re: How to access correctly serial port inside module?
>
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> Jan Engelhardt schrieb:
>> On May 24 2007 12:22, Lars K.W. Gohlke wrote:
>> > ok, I have read everything and also have read the chapters about
>> > tty_drivers. However I'm not really understand, how to ... .
>> >
>> > I will summarize the concrete scenario, which will lead to the
>> > understanding and further solution of deadling with serial driver.
>> >
>> > [scenario]
>> >
>> > 1. in userspace I'm doing: > date > /dev/ttyS0
>> > 2. in kernelspace I want to print out this date.
>> >
>> > [/scenario]
>> >
>> > I'm really new to kernel coding, that's why I maybe understand some
>> > functions not the proper way.
>> >
>> > I'm a bit confused.
>>
>> So am I. Usually, you connect two different machines with a serial cable.
>> (Leaving out the special case of connecting ttyS0-ttyS1 on the same
>> machine.)
>>
>> This poses the first question: whose kernelspace? the sender or
>> the receiver side? And by "this date" do you perhaps mean
>> "whatever was sent", or specifically a date? And print to _where_?
>>
>> Up to now, it looks like you want to do "cat </dev/ttyS0" in-kernel.
>>
>>
>> Jan
>
> date is an example
>
> and you got it, I want to do "cat </dev/ttyS0" in-kernel.
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Jan
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