I'm upgrading from CentOS6 to CentOS 7.
I run 2 weather stations on C6 and have one of them attached to ttyS0 which is on the motherboard, and the other to ttyS2 which in on an add-on PCI serial card.
I'm migrating the weather stations another host running C7 which has a similar hardware configuration. When I connect the weather station to ttyS0 everything works fine, but when I try to use ttyS1 or ttyS2 nothing happens.
The OS identifies all 3 ports, and I've already tried several different serial cards several of the slots on the motherboard all have yielded the same result. I've even gone so far as to try to get this to work on another computer running C7 with the same result, success on ttyS0, but nothing nothing when I try ttyS1 or ttyS2.
I'm thinking that this might be a driver issue, but having used several different cards I'm just not sure.
Any assistance would be greatly appreciated.
Pete
On Sun, Jan 28, 2018 at 12:10:29PM -0500, Pete Geenhuizen wrote:
I'm upgrading from CentOS6 to CentOS 7.
I run 2 weather stations on C6 and have one of them attached to ttyS0 which is on the motherboard, and the other to ttyS2 which in on an add-on PCI serial card.
I'm migrating the weather stations another host running C7 which has a similar hardware configuration. When I connect the weather station to ttyS0 everything works fine, but when I try to use ttyS1 or ttyS2 nothing happens.
The OS identifies all 3 ports, and I've already tried several different serial cards several of the slots on the motherboard all have yielded the same result. I've even gone so far as to try to get this to work on another computer running C7 with the same result, success on ttyS0, but nothing nothing when I try ttyS1 or ttyS2.
I'm thinking that this might be a driver issue, but having used several different cards I'm just not sure.
Any assistance would be greatly appreciated.
Pete
Wondering if you've tried poking at them with 'setserial'?
On 01/28/18 20:15, Fred Smith wrote:
On Sun, Jan 28, 2018 at 12:10:29PM -0500, Pete Geenhuizen wrote:
I'm upgrading from CentOS6 to CentOS 7.
I run 2 weather stations on C6 and have one of them attached to ttyS0 which is on the motherboard, and the other to ttyS2 which in on an add-on PCI serial card.
I'm migrating the weather stations another host running C7 which has a similar hardware configuration. When I connect the weather station to ttyS0 everything works fine, but when I try to use ttyS1 or ttyS2 nothing happens.
The OS identifies all 3 ports, and I've already tried several different serial cards several of the slots on the motherboard all have yielded the same result. I've even gone so far as to try to get this to work on another computer running C7 with the same result, success on ttyS0, but nothing nothing when I try ttyS1 or ttyS2.
I'm thinking that this might be a driver issue, but having used several different cards I'm just not sure.
Any assistance would be greatly appreciated.
Pete
Wondering if you've tried poking at them with 'setserial'?
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
On Mon, Jan 29, 2018 at 07:00:02AM -0500, Pete Geenhuizen wrote:
On 01/28/18 20:15, Fred Smith wrote:
On Sun, Jan 28, 2018 at 12:10:29PM -0500, Pete Geenhuizen wrote:
I'm upgrading from CentOS6 to CentOS 7.
I run 2 weather stations on C6 and have one of them attached to ttyS0 which is on the motherboard, and the other to ttyS2 which in on an add-on PCI serial card.
I'm migrating the weather stations another host running C7 which has a similar hardware configuration. When I connect the weather station to ttyS0 everything works fine, but when I try to use ttyS1 or ttyS2 nothing happens.
The OS identifies all 3 ports, and I've already tried several different serial cards several of the slots on the motherboard all have yielded the same result. I've even gone so far as to try to get this to work on another computer running C7 with the same result, success on ttyS0, but nothing nothing when I try ttyS1 or ttyS2.
I'm thinking that this might be a driver issue, but having used several different cards I'm just not sure.
Any assistance would be greatly appreciated.
Pete
Wondering if you've tried poking at them with 'setserial'?
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
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
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Fred Smith -
Pete Geenhuizen