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

Subject: arrays in epics records
From: ktsubota@keck.hawaii.edu (Kevin Tsubota)
To: tech-talk@aps.anl.gov
Date: Thu, 13 Jul 95 08:09:19 HST
Rozelle and anyone else who can help,

I have the following comments about putting arrays in EPICS records from our
training session:

>!***************************************
>! This is a sample array declaration:
>! Arrays:  DBF_NOACCESS indicates array
>!          3 = special interest level
>!          4 = number of bytes
>!              in this case its just a pointer so 4bytes
>!              if you had the actual array it'll be 4*no_elements in array
>!              ie. array size 10 = 40bytes
>!          uint16_T * xxx; = what gets put in the C code
>!"X Buf Ptr"       XBP SPC_DBADDR  DBF_NOACCESS   NO    3    4    uint16_t * xbp;
>!"Y Buf Ptr"       YBP SPC_DBADDR  DBF_NOACCESS   NO    3    4    uint16_t * ybp;
>!"I Buf Ptr"       IBP SPC_DBADDR  DBF_NOACCESS   NO    3    4    uint16_t * ibp;
>!***************************************

I've added the following in a SERVO record that I'm creating and it
builds with no errors.  However I want to be able to do "dbpf" and also be
able to display entries in the arrays via DM.

>"Velocity filter coeff arr"	AVF   SPC_DBADDR ASL1 DBF_NOACCESS  NO     3      80		double avf[NUMB_VF_COEFF];
>"Feedforward pos coeff arr"	AFFP  SPC_DBADDR ASL1 DBF_NOACCESS  NO     3      80		double affp[NUMB_FF_P_COEFF];
>"Feed forward rate coeff arr"	AFFR  SPC_DBADDR ASL1 DBF_NOACCESS  NO     3      80		double affr[NUMB_FF_R_COEFF];

But I can't.  From DM when I access the fields I get the following errors from the VxWorks shell:

llegal Database Request Type PV: dcs:axe:az:servo.AFFP error detected in routine: db_name_to_addr error
Illegal Database Request Type PV: dcs:axe:az:servo.AFFR error detected in routine: db_name_to_addr error

Can I have array fields and is it also possible to access each individual entry in the array?

Thanks,

Kevin Tsubota



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