5i25 pin confusion

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02 Jan 2013 15:36 - 02 Jan 2013 15:43 #28295 by gandalf69
5i25 pin confusion was created by gandalf69
I tried this from message 21633:

halrun
loadrt hostmot2
loadrt hm2_pci
exit
dmesg

and part of what I got was this:

[ 116.845757] hm2/hm2_5i25.0: IO Pin 017 (P2-01): IOPort
[ 116.845759] hm2/hm2_5i25.0: IO Pin 018 (P2-14): IOPort
[ 116.845761] hm2/hm2_5i25.0: IO Pin 019 (P2-02): IOPort
[ 116.845763] hm2/hm2_5i25.0: IO Pin 020 (P2-15): IOPort
[ 116.845765] hm2/hm2_5i25.0: IO Pin 021 (P2-03): IOPort
[ 116.845767] hm2/hm2_5i25.0: IO Pin 022 (P2-16): IOPort
[ 116.845769] hm2/hm2_5i25.0: IO Pin 023 (P2-04): IOPort

but 5i25man.pdf says:

P2 PIN FUNCTION
1 IO17
2 IO18
3 IO19
4 IO20
5 IO21
6 IO22
7 IO23
8 IO24

(I can't format this, the IOs should be under FUNCTION)

Presumably something is wrong but having been assured that the 5i25man is the latest information I am reluctant to guess. If someone can explain this discrepancy I'd appreciate it.

5i25man.pdf also refers to 5i25IO.PIN on the non-existant distribution disc.
I have not found 5i25IO.PIN anywhere.
Last edit: 02 Jan 2013 15:43 by gandalf69. Reason: unable to format spaces/tabs

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02 Jan 2013 20:25 #28300 by BigJohnT
Replied by BigJohnT on topic 5i25 pin confusion
Are you using the 5i25 without a daughter card?

John

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02 Jan 2013 23:35 #28316 by PCW
Replied by PCW on topic 5i25 pin confusion
P2 is the secondary connector which is a 26 pin male 0.1" pitch header

The manual pinout is correct for the 26 pin header.

The hostmot2 driver lists pins in their DB25 order which is different
from header pin order but probably most useful for daughtercard connections
since almost all daughtercards (mesa or otherwise) will use a DB-25 connector

header --> DB25:

1 --> 1
2 --> 14
3 --> 2
4 --> 15
5 --> 3
6 --> 16
7 --> 4
8 --> 17
9 --> 5

etc

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03 Jan 2013 13:58 - 03 Jan 2013 15:38 #28335 by gandalf69
Replied by gandalf69 on topic 5i25 pin confusion

P2 is the secondary connector which is a 26 pin male 0.1" pitch header

The manual pinout is correct for the 26 pin header.

The hostmot2 driver lists pins in their DB25 order which is different
from header pin order but probably most useful for daughtercard connections
since almost all daughtercards (mesa or otherwise) will use a DB-25 connector

header --> DB25:

1 --> 1
2 --> 14
3 --> 2
4 --> 15
5 --> 3
6 --> 16
7 --> 4
8 --> 17
9 --> 5

etc


Thanks.
In that case the references to (P2- ) of the 5i25 in:

[ 116.845757] hm2/hm2_5i25.0: IO Pin 017 (P2-01): IOPort
[ 116.845759] hm2/hm2_5i25.0: IO Pin 018 (P2-14): IOPort
[ 116.845761] hm2/hm2_5i25.0: IO Pin 019 (P2-02): IOPort
[ 116.845763] hm2/hm2_5i25.0: IO Pin 020 (P2-15): IOPort
[ 116.845765] hm2/hm2_5i25.0: IO Pin 021 (P2-03): IOPort
[ 116.845767] hm2/hm2_5i25.0: IO Pin 022 (P2-16): IOPort
[ 116.845769] hm2/hm2_5i25.0: IO Pin 023 (P2-04): IOPort

etc appear to be incorrectly described.
Last edit: 03 Jan 2013 15:38 by gandalf69.

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03 Jan 2013 13:59 - 03 Jan 2013 14:15 #28336 by gandalf69
Replied by gandalf69 on topic 5i25 pin confusion
JT, a 7i77 is connected to P3 of the 5i25 and powered.
There is nothing connected to 5i25 P2.
I'm just trying to make sense of the pin descriptions and numbers
Last edit: 03 Jan 2013 14:15 by gandalf69.

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03 Jan 2013 17:51 #28338 by PCW
Replied by PCW on topic 5i25 pin confusion
Since the second connector is intended to be used
with a a DB25 daughtercard, I think the pinout that the driver reports
is the best one (that is the most most useful one)

But I will update the manual so it shows both header
and DB25 pins for P2

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03 Jan 2013 19:48 #28342 by BigJohnT
Replied by BigJohnT on topic 5i25 pin confusion

JT, a 7i77 is connected to P3 of the 5i25 and powered.
There is nothing connected to 5i25 P2.
I'm just trying to make sense of the pin descriptions and numbers


Gotcha. They can be confusing, I have to ask Peter...

John

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