Hi all,
Some months back, I reported an issue with DS28EA00's PIO handling (and
probably DS2413 as well).
I did some test with repository downloaded yesterday in order to correct this
issue ...
The behaviour changed since 3.1 : now changing to any value for PIO.B clears
PIO.A but changing PIO.A doesn't affect PIO.B at all which is better because we
have now at last 1 "freely manageable" PIO. In other words :
echo 0 > PIO.B
echo 0 > PIO.A
latch.ALL = 0,0
echo 1 > PIO.A
latch.ALL = 1,0
=> PIO.B is unchanged
echo 0 > PIO.B
latch.ALL = 0,0
=> Clear PIO.A
echo 1 > PIO.A
echo 1 > PIO.B
latch.ALL = 0,1
=> Clear PIO.A as well
echo 1 > PIO.B
echo 1 > PIO.A
latch.ALL = 1,1
=> PIO.B is unchanged
FS_w_pio() in ow_1820.c file is writing and is defined in struct filetype
DS28EA00.
But in order to speed up my investigation, I would like to know where is filled
one_wire_query structure used as argument for FS_w_pio().
In this structure, size is in Bytes or in bits ?
Anyway, the problem is the same : As as per DS28EA00's datasheet, it's not
possible to write PIO.B w/o writing to PIO.A, the solution is to feed PIO.A
with its current latch value when writing to PIO.B.
Thanks for your attention.
Best regards,
Laurent
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