Re: Serial port bus connection issue on arm platform

[Peter Milne via Tech-talk <tech-talk@aps.anl.gov>]

Hi John

The IOC is running on the Zynq and uses one of the two Zynq tty ports?.
If so, they are usually called /dev/ttyPS0, /dev/ttyPS1

If you actually have a USB->tty converter connected and the port _is_ in fact /dev/ttyUSB0, please ignore this comment.

Cheers

Peter

On 07/11/2019 14:54, Seeberger, John T CIV USN NAS PAX MD (USA) via Tech-talk wrote:
> Good day. I have a database with 7 PV's that drive an aviation six pack. I have successfully built and run on Xilinx ultrascale dev board, Epics base-3.15.5, synApps_6_0 compiled with aarch64. The ioc runs fine under petalinux on zcu106. The simulator uses /dev/ttyUSB0 to talk to a labview application that feeds the data. The example is based upon  an arduino example I found on the web. Very simple.
>
> Now I want to target gnueabihf Xilinx zynq 7000 and run on zc706 and NAII board. Database unchanged. I recompiled epics base and syncapps with 32 bit arm compiler, rebuild petalinux. Now when I run I'm getting errors with the serial port. Here is what I think are relevant snippits.
>
>
> The aoa record:
> record(ai, aoa) {
>      field(DESC, "Angle of Atack Sensor")
>      field(DTYP, "stream")
>      field(INP, "@aoa.proto get_analog() $(PORT)")
>      field(SCAN, ".1 second")
>      field(HOPR, "360")
>      field(LOPR, "0")
>      field(PREC, "2")
>      field(FLNK, "speed")
> }
>
>
>
> I limit the error message to first PV, but all records have same errors.
>
> The serial port is there, functional, permissions fine. The same database and startup works fine when built with aarch64 compiler and run on zcu106.
>
> I would like to get working under the 32 bit arm zynq, so the database run on a North Atlantic Industries VPX, or VME  board.

> Startup:
> epicsEnvSet(STREAM_PROTOCOL_PATH,"helloWorldIOCApp/Db")
> dbLoadDatabase("dbd/helloWorldIOC.dbd")
> helloWorldIOC_registerRecordDeviceDriver(pdbbase)
> drvAsynSerialPortConfigure("SERIALPORT","/dev/ttyUSB0",0,0,0)
> asynSetOption("SERIALPORT",-1,"baud","115200")
> asynSetOption("SERIALPORT",-1,"bits","8")
> asynSetOption("SERIALPORT",-1,"parity","none")
> asynSetOption("SERIALPORT",-1,"stop","1")
> asynSetOption("SERIALPORT",-1,"clocal","Y")
> asynSetOption("SERIALPORT",-1,"crtscts","N")
> dbLoadRecords("db/arduino.db","PORT='SERIALPORT'"
> iocInit()
> Starting iocInit
> ############################################################################
> ## EPICS R3.15.5
> ## EPICS Base built Oct 24 2019
> ############################################################################
> 2019/10/31 21:26:01.810631 _main_ Cannot find a bus named 'SERIALPORT' for 'aoa'
> 2019/10/31 21:26:01.810770 _main_ aoa: Can't attach to bus SERIALPORT -1
> 2019/10/31 21:26:01.810834 _main_ aoa: Record initialization failed
>
> Warning: RSRV has empty beacon address list
> iocRun: All initialization complete
> ## Start any sequence programs
> #seq snchelloWorldIOC,"user=johnseebergerlin"
> 2019/10/31 21:26:02.413981 scan-0.1 aoa: Record not initialised correctly
>
> dbior
> Driver: stream
>    StreamDevice 2.7.7 built Oct 24 2019 13:43:29
>    registered bus interfaces:
>      DebugInterface
>      DummyInterface
> Driver: drvAsyn
> SERIALPORT multiDevice:No canBlock:Yes autoConnect:Yes
> Serial line /dev/ttyUSB0: Connected
>
> dbior "stream"
> Driver: stream
>    StreamDevice 2.7.7 built Oct 24 2019 13:43:29
>    registered bus interfaces:
>      DebugInterface
>      DummyInterface
>
> found this relevant tech-talk post:
> If AsynDriverInterface is not listed, have you accidentally commented out the bus interface in CONFIG_STREAM?
> Unfortunately, with asyn 4-5, you still have to specify ASYN_VERS=4-3 in
> CONFIG_STREAM (I will fix that later).
>
> What is this refering to, where is this?
>
> How can I further debug?
>
> thx
> Thad


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Peter Milne
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