[CentOS] Centos 7 add-on serial cards
Pete Geenhuizen
pete at geenhuizen.net
Mon Jan 29 14:34:24 UTC 2018
On 01/29/18 09:19, Fred Smith wrote:
> On Mon, Jan 29, 2018 at 07:00:02AM -0500, Pete Geenhuizen wrote:
>>
>> On 01/28/18 20:15, Fred Smith wrote:
>> Thanks for the suggestion.
>>
>> I looked at them with setserial, but I have no familiarity with the
>> program to know what to change.
>>
>> setserial -ag /dev/ttyS*
>> /dev/ttyS0, Line 0, UART: 16550A, Port: 0x03f8, IRQ: 4
>> Baud_base: 115200, close_delay: 50, divisor: 0
>> closing_wait: 3000
>> Flags: spd_normal skip_test
>>
>> /dev/ttyS1, Line 1, UART: 16550A, Port: 0x8000, IRQ: 17
>> Baud_base: 115200, close_delay: 50, divisor: 0
>> closing_wait: none
>> Flags: spd_normal skip_test
>>
>> /dev/ttyS2, Line 2, UART: 16550A, Port: 0x8400, IRQ: 17
>> Baud_base: 115200, close_delay: 50, divisor: 0
>> closing_wait: none
>> Flags: spd_normal skip_test
>>
>> /dev/ttyS3, Line 3, UART: unknown, Port: 0x02e8, IRQ: 3
>> Baud_base: 115200, close_delay: 50, divisor: 0
>> closing_wait: 3000
>> Flags: spd_normal
>>
>> I changed the closing_wait: on ttyS1 to match ttyS0, but that didn't
>> do anything, so there must be more to it.
>>
>> Pete
> it has been so many years since I've fooled with a serial port that I
> don't remember any details. however, this page may prove helpful, it
> appears to contain a lot of potentially useful info:
>
> http://www.tldp.org/HOWTO/Serial-HOWTO-8.html
>
> and also this one (linked from the document above:
>
> http://www.tldp.org/HOWTO/Serial-HOWTO-16.html#slow_
>
> Fred
>
It's been many years for me as well. From C4 to C6 it just worked and I
thought nothing more of it, but now I'm confronted with this issue.
Thanks for the info and the links hopefully I can glean something out of
it that will solve my dilemma.
Pete
--
Unencumbered by the thought process.
-- Click and Clack the Tappet brothers
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