Re: Further OMS PC78 questions

["Peterson, Kevin M. via Tech-talk" <tech-talk@aps.anl.gov>]

Jim,

I don't understand why the terminator is appearing at the start of the reply from the controller.  One thing I recommend doing is temporarily setting the input end of string back to "" and then manually sending a few other commands to the controller in addition to the WYH command.  Each read will result in a timeout, it'll show you all the characters in the controller's reply.  Do all the commands have responses that start with \n\r?

I looked at an old ebrick setup and I found that it didn't use the serial port to communicate with the controller.  The IOC had the following call before the OmsPC68Setup and OmsPC68Config calls:

drvOmsPcx8Init("P0","/dev/oms0")

drvOmsPcx8Init comes from the ebrick module (https://urldefense.us/v3/__https://gcc02.safelinks.protection.outlook.com/?url=https*3A*2F*2Fepics.anl.gov*2Fbcda*2FsynApps*2Febrick*2Febrick.html&data=05*7C02*7Ctech-talk*40aps.anl.gov*7C70db84a4755842d7eeab08de344ba99a*7C0cfca18525f749e38ae7704d5326e285*7C0*7C0*7C639005696732109925*7CUnknown*7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ*3D*3D*7C0*7C*7C*7C&sdata=zFLJHOLr5KCiwWQtuPcLQPmbTa*2BjSsa0P8Pvk0RTpVM*3D&reserved=0__;JSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUlJQ!!G_uCfscf7eWS!ZdTaxLOl3W7LaqbIyQ5bTyPGFBiObCyU2S32Ta7nCiyKlCfLwdRLHA3arOzv4bBeXco5pMUf43Mc-f0yM8R-Vps$ ), which is no longer supported and hasn't been built at the APS since the synApps_5_4_2, which doesn't exist on the old synApps web page (https://urldefense.us/v3/__https://gcc02.safelinks.protection.outlook.com/?url=https*3A*2F*2Fwww.aps.anl.gov*2FBCDA*2FsynApps*2FWhere-to-find-it&data=05*7C02*7Ctech-talk*40aps.anl.gov*7C70db84a4755842d7eeab08de344ba99a*7C0cfca18525f749e38ae7704d5326e285*7C0*7C0*7C639005696732127456*7CUnknown*7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ*3D*3D*7C0*7C*7C*7C&sdata=tpq7KIgRvoF7RiUJLD1rDa*2FY0Tssm4q1AcwKUquYUls*3D&reserved=0__;JSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUl!!G_uCfscf7eWS!ZdTaxLOl3W7LaqbIyQ5bTyPGFBiObCyU2S32Ta7nCiyKlCfLwdRLHA3arOzv4bBeXco5pMUf43Mc-f0y2BMkmvg$ ) but dates back to 2009.

I don't know if we ever used the serial port to communicate with OMS PC68 controllers...

Kevin

________________________________________
From: James P. Withrow <jwithrow@cornell.edu>
Sent: Friday, December 5, 2025 11:40 AM
To: Peterson, Kevin M.; Tech Talk EPICS
Subject: Re: Further OMS PC78 questions

Kevin - AsynOctetGetInputEos L0 initially reported "". In the IOC's st. cmd file, I added 'asynOctetSetInputEos("L0", 0, "\n\r")'. I still get the same result from the IOC initialization, but now when I caput the
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Kevin -

AsynOctetGetInputEos L0 initially reported "". In the IOC's st.cmd file, I added 'asynOctetSetInputEos("L0", 0, "\n\r")'. I still get the same result from the IOC initialization, but now when I caput the 'WY' command, the port only reads back the first 8 characters:

2025/12/05 11:33:58.486 /dev/ttyS0 write 2
WY
2025/12/05 11:33:58.497 /dev/ttyS0 read 8
\n\rPC78 v
Invalid entry-card #0

In the PC78 manual, it states that echo off is the default at power-up.

-Jim

Jim Withrow, Research Support Specialist - jwithrow@cornell.edu
NE-CAT, Cornell University - https://urldefense.us/v3/__https://gcc02.safelinks.protection.outlook.com/?url=https*3A*2F*2Fnecat.chem.cornell.edu*2F&data=05*7C02*7Ctech-talk*40aps.anl.gov*7C70db84a4755842d7eeab08de344ba99a*7C0cfca18525f749e38ae7704d5326e285*7C0*7C0*7C639005696732143476*7CUnknown*7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ*3D*3D*7C0*7C*7C*7C&sdata=eLpTnNCFLTcmtp*2FsiIAgBf0wbvzD1EiL6JVOlPnEtNo*3D&reserved=0__;JSUlJSUlJSUlJSUlJSUlJSUlJSUlJQ!!G_uCfscf7eWS!ZdTaxLOl3W7LaqbIyQ5bTyPGFBiObCyU2S32Ta7nCiyKlCfLwdRLHA3arOzv4bBeXco5pMUf43Mc-f0y0UlBhBY$ <https://urldefense.us/v3/__https://gcc02.safelinks.protection.outlook.com/?url=https*3A*2F*2Furldefense.us*2Fv3*2F__https*3A*2F*2Fnecat.chem.cornell.edu__*3B!!G_uCfscf7eWS!ZYL7M6EP1lVQH8ducuWmZgsqoRSWjcUP8afuti0wPpezotL5sJknAFnsPoXrqpxBWSJSaQVA8SlvSIj_wQW8*24&data=05*7C02*7Ctech-talk*40aps.anl.gov*7C70db84a4755842d7eeab08de344ba99a*7C0cfca18525f749e38ae7704d5326e285*7C0*7C0*7C639005696732158465*7CUnknown*7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ*3D*3D*7C0*7C*7C*7C&sdata=RUrmVmehZfJ2qv8csi9eNzBaqRoP1aVOd*2BIqy*2B6pSeQ*3D&reserved=0__;JSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUlJSU!!G_uCfscf7eWS!ZdTaxLOl3W7LaqbIyQ5bTyPGFBiObCyU2S32Ta7nCiyKlCfLwdRLHA3arOzv4bBeXco5pMUf43Mc-f0ysHg3TBU$ >
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________________________________
From: Peterson, Kevin M. <kmpeters@anl.gov>
Sent: Friday, December 5, 2025 9:31 AM
To: James P. Withrow <jwithrow@cornell.edu>; Tech Talk EPICS <tech-talk@aps.anl.gov>
Subject: Re: Further OMS PC78 questions

This output is interesting.  The \n\r at the start seems like an unhandled terminator from a previous command:

2025/12/05 07:58:37.732 /dev/ttyS0 write 2
WY
2025/12/05 07:58:37.744 /dev/ttyS0 read 8
\n\rPC78 v

Please run the following command on the IOC's shell:

asynOctetGetInputEos L0

Is the input end of string set to \n\r or \r?  I think either of those should work.

Kevin