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<== Date ==> <== Thread ==>

Subject: Asyn timeout
From: Hinko Kocevar <hinkocevar@gmail.com>
To: "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Date: Tue, 11 Apr 2017 11:40:26 +0200
Hi,

I have the following code:
...
    status = pasynOctetSyncIO->writeRead(mAsynUserCommand,
        mReq, mReqSz, mResp, mRespSz,
        timeout, &mReqActSz, &mRespActSz, &eomReason);

...

And startup st.cmd:

epicsEnvSet("I2C_IP_PORT",          "AK_I2C_COMM")

# Create the asyn port to talk to the AK-NORD server on command port 1002.
drvAsynIPPortConfigure($(I2C_IP_PORT),"192.168.1.100:1002")
asynSetTraceIOMask($(I2C_IP_PORT),0,255)
asynSetTraceMask($(I2C_IP_PORT),0,255)

I connect to my asyn port driver as so:

AKI2CTMP100Configure($(I2C_TMP100_PORT), $(I2C_IP_PORT), 1, "0x49", 1, 0, 0)

After communicating with the device
pasynOctetSyncIO->writeRead() seems to return 1 (asynTimeout) .. see last line of this output:

epics> 2017/04/11 11:10:31.449 AK_I2C_COMM asynManager::queueLockPort locking port
2017/04/11 11:10:31.449 AK_I2C_COMM asynManager::queueLockPort taking mutex 0x7f89a80009d0
2017/04/11 11:10:31.449 AK_I2C_COMM asynManager::queueLockPort queueing request
2017/04/11 11:10:31.449 AK_I2C_COMM addr -1 queueRequest priority 0 not lockHolder
2017/04/11 11:10:31.449 AK_I2C_COMM asynManager::queueLockPort waiting for event
2017/04/11 11:10:31.449 asynManager::portThread port=AK_I2C_COMM callback
2017/04/11 11:10:31.449 AK_I2C_COMM asynManager::queueLockPortCallback signaling begin event
2017/04/11 11:10:31.449 AK_I2C_COMM asynManager::queueLockPortCallback waiting for mutex from queueUnlockPort
2017/04/11 11:10:31.449 AK_I2C_COMM asynManager::queueLockPort got event from callback
2017/04/11 11:10:31.449 AK_I2C_COMM flush
2017/04/11 11:10:31.449 192.168.1.100:1002 flush
2017/04/11 11:10:31.449 192.168.1.100:1002 write.
2017/04/11 11:10:31.449 192.168.1.100:1002 write 12

\002\000\t\003H\001\001W\000\001\370\003

02 00 09 03 48 01 01 57 00 01 f8 03
2017/04/11 11:10:31.450 wrote 12 to 192.168.1.100:1002, return asynSuccess.
2017/04/11 11:10:31.450 AK_I2C_COMM wrote

\002\000\t\003H\001\001W\000\001\370\003

02 00 09 03 48 01 01 57 00 01 f8 03
2017/04/11 11:10:31.450 asynOctetSyncIO wrote:

\002\000\t\003H\001\001W\000\001\370\003

02 00 09 03 48 01 01 57 00 01 f8 03
2017/04/11 11:10:31.450 192.168.1.100:1002 read.
2017/04/11 11:10:31.450 192.168.1.100:1002 read 2
W
\006W

06 57
2017/04/11 11:10:31.450 AK_I2C_COMM read
W
\006W

06 57
2017/04/11 11:10:31.450 192.168.1.100:1002 read.
2017/04/11 11:10:31.751 AK_I2C_COMM queueUnlockPort
2017/04/11 11:10:31.751 AK_I2C_COMM asynManager::queueUnlockPort waiting for event
2017/04/11 11:10:31.751 AK_I2C_COMM queueUnlockPort unlock mutex 0x7f89a80009d0 complete.
2017/04/11 11:10:31.751 AKBase:ipPortWriteRead, status=1



I can interpret the data as proper (write and read), number of bytes sent and requested is correct.

I would like to understand if this behavior is intended?

Thanks,
Hinko

Replies:
RE: Asyn timeout Mark Rivers

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