Re: Error executing a sample Arduino IOC

[Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov>]

On 3/7/21 9:11 PM, Udit Shah via Tech-talk wrote:
> Hi,
> 
> Today i wrote a simple serial communication IOC for Arduino and all the steps went successfully but showed a package parse error and couldn't read the protocol and .db files for the Arduino.
> 
> I followed the steps given on:
> https://web.archive.org/web/20180417224946/http://www.smolloy.com/2015/12/epics-serial-communication-with-arduino/ <https://web.archive.org/web/20180417224946/http://www.smolloy.com/2015/12/epics-serial-communication-with-arduino/>
> 
> The following was shown in the terminal:
> 
> #!../../bin/linux-x86_64/helloWorldIOC
> < envPaths
> epicsEnvSet("IOC","iochelloWorldIOC")
> epicsEnvSet("TOP","/home/udit/EPICS/IOCs/helloWorldIOC")
> epicsEnvSet("ASYN","/home/udit/EPICS/support/asyn")
> epicsEnvSet("CALC","/home/udit/EPICS/support/calc-R3-7-3")
> epicsEnvSet("STREAM","/home/udit/EPICS/support/StreamDevice")
> epicsEnvSet("EPICS_BASE","/home/udit/EPICS/epics-base")
> epicsEnvSet(STREAM_PROTOCOL_PATH,"helloWorldIOCApp/Db")

Try changing this line to:

> epicsEnvSet(STREAM_PROTOCOL_PATH,"$(TOP)/helloWorldIOCApp/Db")

Relative paths in $(STREAM_PROTOCOL_PATH) aren't evaluated
until later, during iocInit().

Personally, I would suggest not having so many "cd" in a start script.
It's easy to get confused.


> cd "/home/udit/EPICS/IOCs/helloWorldIOC"
> ## Register all support components
> dbLoadDatabase "dbd/helloWorldIOC.dbd"
> helloWorldIOC_registerRecordDeviceDriver pdbbase
> drvAsynSerialPortConfigure("SERIALPORT","/dev/ttyUSB0")
> 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")
> ## Load record instances
> #dbLoadRecords("db/xxx.db","user=udit")
> cd "/home/udit/EPICS/IOCs/helloWorldIOC"
> dbLoadRecords("db/arduino.db","PORT=SERIALPORT")
> cd "/home/udit/EPICS/IOCs/helloWorldIOC/iocBoot/iochelloWorldIOC"
> iocInit
> Starting iocInit
> ############################################################################
> ## EPICS R7.0.4.2-DEV
> ## Rev. R7.0.4.1-186-g5593103c11157aada4e4-dirty
> ############################################################################
> 2021/03/08 10:31:16.749971 _main_ Can't find readable file 'arduino.proto' in 'helloWorldIOCApp/Db'
> 2021/03/08 10:31:16.750018 _main_ while reading protocol 'set_digital' for 'led:set'
> 2021/03/08 10:31:16.750025 _main_ led:set: Protocol parse error
> 2021/03/08 10:31:16.750032 _main_ led:set: Record initialization failed
> Error (514,11) PV: led:set ao: init_record
> 
> 2021/03/08 10:31:16.750066 _main_ Can't find readable file 'arduino.proto' in 'helloWorldIOCApp/Db'
> 2021/03/08 10:31:16.750078 _main_ while reading protocol 'get_analog' for 'photo:get'
> 2021/03/08 10:31:16.750091 _main_ photo:get: Protocol parse error
> 2021/03/08 10:31:16.750107 _main_ photo:get: Record initialization failed
> iocRun: All initialization complete
> ## Start any sequence programs
> #seq sncxxx,"user=udit"
> epics>
> 
> Let me know how to remove this error.
> 
> Best Regards
> Udit