can't download Oceanic VT3 on linux

Tue Mar 11 19:40:13 PDT 2014

On 12/03/14 13:17, Linus Torvalds wrote:
> [0.187] INFO: Read: size=1, data=5A
> So the Linux dump sometimes got A5 instead of 5A.
>
> But the *timing* is very vert different. Here's Linux getting the right data:
>
>    [0.104540] INFO: Write: size=2, data=8400
>    [0.104551] INFO: Read: size=1, data=5A
>
> and here's the same thing with the wrong data:
>
>    [0.109560] INFO: Sleep: value=1
>    [0.110624] INFO: Write: size=4, data=B1000000
>    [0.110634] INFO: Read: size=1, data=A5
>
> Note how it did a two-byte write, and then immediately a read within
> 10 microseconds.
>
> Which is a bit odd. Jef, shouldn't the sleep be *after* the write, and
> before the read? If there are any duplex issues, the "read -> write"
> turnaround isn't the problem (because by the time the read returns, we
> certainly know the data had been fully sent from the other side), but
> the "write -> read" turnaround might be problematic if the reader gets
> confused by DSR coming on while it's still receiving.
>
That log (with sleeps of 1ms) is from my adding the sleep before write 
as Jef suggested.

It's only a 3 wire interface at the dive computer, so if DSR is used 
it's internal to the interface cable. I tried adding 1ms delay after 
write and I didn't see any change in behaviour. Logically there's no 
reason to sleep after the write, because it's doing a blocking read and 
it's receiving a reply (5A, a nak) within the timeout period?

Anyway to clarify matters here's a log from a fresh unmodified check 
out. It's failing the same as 0.4.2.

[0.000025] DATETIME 2014-03-12T02:26:56Z (1394591216)
[0.000048] VERSION 0.5.0-devel (575f2e9016ac9baa2b1b031caa6fe0bc77cdbbee)
[0.000053] DEVICE=/dev/ttyUSB0
[0.000061] oceanic_atom2_device_open
[0.000069] INFO: Open: name=/dev/ttyUSB0
[0.000864] INFO: Configure: baudrate=38400, databits=8, parity=0, 
stopbits=1, flowcontrol=0
[0.000970] INFO: Timeout: value=3000
[0.000977] INFO: Sleep: value=100
[0.101052] INFO: Flush: queue=3, input=0, output=0
[0.101494] INFO: Write: size=2, data=8400
[0.102418] INFO: Read: size=1, data=5A
[0.106364] INFO: Read: size=17, data=4F43452056543320523244203531324BBF
[0.106390] dc_device_dump
[0.107273] INFO: Write: size=4, data=B1000000
[3.108674] INFO: Read: size=0, data=
[3.108685] ERROR: Failed to receive the answer. [in oceanic_atom2.c:332 
(oceanic_atom2_send)]
[3.108688] INFO: Sleep: value=100
[3.208757] INFO: Flush: queue=1, input=0, output=0
[3.211274] INFO: Write: size=4, data=B1000000
[3.211283] INFO: Read: size=1, data=5A
[3.220967] INFO: Read: size=17, data=0416041120081001425800730000000075
[3.223274] INFO: Write: size=4, data=B1000100
[6.226294] INFO: Read: size=0, data=
[6.226306] ERROR: Failed to receive the answer. [in oceanic_atom2.c:332 
(oceanic_atom2_send)]
[6.226309] INFO: Sleep: value=100
[6.326377] INFO: Flush: queue=1, input=0, output=0
[6.327275] INFO: Write: size=4, data=B1000100
[6.327722] INFO: Read: size=1, data=5A
[6.338681] INFO: Read: size=17, data=6701DA064204E506E206DC06FF0FAAFBF6
[6.339275] INFO: Write: size=4, data=B1000200
[9.342297] INFO: Read: size=0, data=
[9.342309] ERROR: Failed to receive the answer. [in oceanic_atom2.c:332 
(oceanic_atom2_send)]
[9.342322] INFO: Sleep: value=100
[9.442390] INFO: Flush: queue=1, input=0, output=0
[9.443290] INFO: Write: size=4, data=B1000200
[9.444317] INFO: Read: size=1, data=5A
[9.455334] INFO: Read: size=17, data=0000DC06FF0FDC06FF0F00000000AA8A14
[9.459280] INFO: Write: size=4, data=B1000300
[9.459290] INFO: Read: size=1, data=A5
[9.459292] ERROR: Unexpected answer start byte(s). [in 
oceanic_atom2.c:338 (oceanic_atom2_send)]
[9.459305] INFO: Sleep: value=100
[9.559376] INFO: Flush: queue=1, input=0, output=0
[9.563276] INFO: Write: size=4, data=B1000300
[9.563287] INFO: Read: size=1, data=5A
[9.571795] INFO: Read: size=17, data=890E370D00011B0B670542053250AAE1C2
[9.575273] INFO: Write: size=4, data=B1000400
[12.578294] INFO: Read: size=0, data=
[12.578306] ERROR: Failed to receive the answer. [in oceanic_atom2.c:332 
(oceanic_atom2_send)]
[12.578309] INFO: Sleep: value=100
[12.678377] INFO: Flush: queue=1, input=0, output=0
[12.679278] INFO: Write: size=4, data=B1000400
[12.680546] INFO: Read: size=1, data=5A
[12.691540] INFO: Read: size=17, data=300220028003500530BEB0BB0000000085
[12.695277] INFO: Write: size=4, data=B1000500
[12.695287] INFO: Read: size=1, data=A5
[12.695289] ERROR: Unexpected answer start byte(s). [in 
oceanic_atom2.c:338 (oceanic_atom2_send)]
[12.695292] INFO: Sleep: value=100
[12.795364] INFO: Flush: queue=1, input=0, output=0
[12.799274] INFO: Write: size=4, data=B1000500
[12.799284] INFO: Read: size=1, data=5A
[12.808012] INFO: Read: size=17, data=A014000300002C01980805A0022100024E
[12.811273] INFO: Write: size=4, data=B1000600
[12.811281] INFO: Read: size=1, data=A5
[12.811283] ERROR: Unexpected answer start byte(s). [in 
oceanic_atom2.c:338 (oceanic_atom2_send)]
[12.811286] INFO: Sleep: value=100
[12.911358] INFO: Flush: queue=1, input=0, output=0
[12.915277] INFO: Write: size=4, data=B1000600
[12.915291] INFO: Read: size=1, data=5A
[12.924526] INFO: Read: size=17, data=3899000099003102E9050400000000008F
[12.927275] INFO: Write: size=4, data=B1000700
[12.927285] INFO: Read: size=1, data=A5
[12.927287] ERROR: Unexpected answer start byte(s). [in 
oceanic_atom2.c:338 (oceanic_atom2_send)]
[12.927290] INFO: Sleep: value=100

and here's a log with a 1ms sleep after write:

[0.000029] DATETIME 2014-03-12T02:37:41Z (1394591861)
[0.000050] VERSION 0.5.0-devel (575f2e9016ac9baa2b1b031caa6fe0bc77cdbbee)
[0.000054] DEVICE=/dev/ttyUSB0
[0.000060] oceanic_atom2_device_open
[0.000065] INFO: Open: name=/dev/ttyUSB0
[0.000936] INFO: Configure: baudrate=38400, databits=8, parity=0, 
stopbits=1, flowcontrol=0
[0.001179] INFO: Timeout: value=3000
[0.001185] INFO: Sleep: value=100
[0.101259] INFO: Flush: queue=3, input=234, output=0
[0.101550] INFO: Write: size=2, data=8400
[0.101557] INFO: Sleep: value=1
[0.103201] INFO: Read: size=1, data=5A
[0.107077] INFO: Read: size=17, data=4F43452056543320523244203531324BBF
[0.107097] dc_device_dump
[0.108720] INFO: Write: size=4, data=B1000000
[0.108727] INFO: Sleep: value=1
[3.112802] INFO: Read: size=0, data=
[3.112814] ERROR: Failed to receive the answer. [in oceanic_atom2.c:333 
(oceanic_atom2_send)]
[3.112817] INFO: Sleep: value=100
[3.212886] INFO: Flush: queue=1, input=0, output=0
[3.216734] INFO: Write: size=4, data=B1000000
[3.216741] INFO: Sleep: value=1
[3.217802] INFO: Read: size=1, data=5A
[3.225648] INFO: Read: size=17, data=0416041120081001425800730000000075
[3.228718] INFO: Write: size=4, data=B1000100
[3.228724] INFO: Sleep: value=1
[3.229784] INFO: Read: size=1, data=A5
[3.229787] ERROR: Unexpected answer start byte(s). [in 
oceanic_atom2.c:339 (oceanic_atom2_send)]
[3.229790] INFO: Sleep: value=100
[3.329855] INFO: Flush: queue=1, input=0, output=0
[3.332716] INFO: Write: size=4, data=B1000100
[3.332721] INFO: Sleep: value=1
[3.333782] INFO: Read: size=1, data=5A
[3.342275] INFO: Read: size=17, data=6701DA064204E506E206DC06FF0FAAFBF6
[3.344750] INFO: Write: size=4, data=B1000200
[3.344757] INFO: Sleep: value=1
[6.348834] INFO: Read: size=0, data=
[6.348845] ERROR: Failed to receive the answer. [in oceanic_atom2.c:333 
(oceanic_atom2_send)]
[6.348849] INFO: Sleep: value=100
[6.448920] INFO: Flush: queue=1, input=0, output=0
[6.452722] INFO: Write: size=4, data=B1000200
[6.452728] INFO: Sleep: value=1
[6.453794] INFO: Read: size=1, data=5A
[6.461925] INFO: Read: size=17, data=0000DC06FF0FDC06FF0F00000000AA8A14
[6.464720] INFO: Write: size=4, data=B1000300
[6.464727] INFO: Sleep: value=1
[6.465792] INFO: Read: size=1, data=A5
[6.465798] ERROR: Unexpected answer start byte(s). [in 
oceanic_atom2.c:339 (oceanic_atom2_send)]
[6.465801] INFO: Sleep: value=100
[6.565869] INFO: Flush: queue=1, input=0, output=0
[6.568718] INFO: Write: size=4, data=B1000300
[6.568724] INFO: Sleep: value=1
[6.569784] INFO: Read: size=1, data=5A
[6.578391] INFO: Read: size=17, data=890E370D00011B0B670542053250AAE1C2
[6.580718] INFO: Write: size=4, data=B1000400
[6.580724] INFO: Sleep: value=1
[6.581785] INFO: Read: size=1, data=A5
[6.581789] ERROR: Unexpected answer start byte(s). [in 
oceanic_atom2.c:339 (oceanic_atom2_send)]
[6.581792] INFO: Sleep: value=100
[6.681864] INFO: Flush: queue=1, input=0, output=0
[6.684751] INFO: Write: size=4, data=B1000400
[6.684758] INFO: Sleep: value=1
[6.685823] INFO: Read: size=1, data=5A
[6.694910] INFO: Read: size=17, data=300220028003500530BEB0BB0000000085
[6.696738] INFO: Write: size=4, data=B1000500
[6.696745] INFO: Sleep: value=1
[6.697806] INFO: Read: size=1, data=A5
[6.697812] ERROR: Unexpected answer start byte(s). [in 
oceanic_atom2.c:339 (oceanic_atom2_send)]
[6.697814] INFO: Sleep: value=100
[6.797879] INFO: Flush: queue=1, input=0, output=0
[6.800723] INFO: Write: size=4, data=B1000500
[6.800730] INFO: Sleep: value=1
[6.801823] INFO: Read: size=1, data=5A
[6.810503] INFO: Read: size=17, data=A014000300002C01980805A0022100024E
[6.812718] INFO: Write: size=4, data=B1000600
[6.812723] INFO: Sleep: value=1
[6.813788] INFO: Read: size=1, data=A5
[6.813794] ERROR: Unexpected answer start byte(s). [in 
oceanic_atom2.c:339 (oceanic_atom2_send)]
[6.813797] INFO: Sleep: value=100
[6.913866] INFO: Flush: queue=1, input=0, output=0
[6.916722] INFO: Write: size=4, data=B1000600
[6.916728] INFO: Sleep: value=1
[6.917794] INFO: Read: size=1, data=5A
[6.927021] INFO: Read: size=17, data=3899000099003102E9050400000000008F

I'd kill for an RS-232 capable logic analyser right now, so I could see 
what's actually happening at the dive computer.

Hamish