Re: trying to find information on mvme5100 battery

[Dirk Zimoch via Tech-talk <tech-talk@aps.anl.gov>]

Ehm... I screwed up the file names. The chip Name is like "M48T37" and 
the file and function names should have matched. Sorry. Here are the 
fixed files.
Dirk

On 11.02.19 10:43, Dirk Zimoch via Tech-talk wrote:
> Hi Maren,
>
> Attached find my driver for the M48T37 Timekeeper battery status. It 
> works with any EPICS version on MVME51xx as well as on MVME23xx, maybe 
> on more boards using this chip.
> I have some more code to read and set the RTC and use the alarm function 
> of the M48T37 in case you need it.
> The code is vxWorks only.
>
> Be aware that the M48T37 reads the battery status only once at power-on. 
> So there is no point in processing the record more often than PINI=YES.
> Dirk
>
>
> On 09.02.19 02:06, Maren Purves wrote:
> > Happy to, thanks Dirk!
> >
> > On 2/8/19 05:35, Dirk Zimoch via Tech-talk wrote:
> > > I am just now writing a driver for it. Wait a few days please...
> > >
> > > On 08.02.19 03:01, Maren Purves via Tech-talk wrote:
> > > > Hi all,
> > > >
> > > > I'm working on some monitoring stuff for a new receiver
> > > > and as the new receiver isn't here yet I just got a spare
> > > > mvme5100 board. Trying to boot it I found that it had
> > > > 'forgotten' its boot parameters. It is supposed to have
> > > > a replaceable battery and we found on part that looks like
> > > > it may be a battery but with no part number or anything on
> > > > it.
> > > > None of the manuals I found on-line has a board layout
> > > > with labels on it that would tell me where the battery
> > > > is (assuming that the battery is the problem), or had
> > > > any specifications for it.
> > > > Pulling out another spare board, it behaved the same way.
> > > > If we have to put any of these spare boards into use that
> > > > would mean that they would have to have their boot parameters
> > > > reinstalled each time we have a power glitch. That's OK
> > > > for us here in the office/lab but not OK for people
> > > > operating telescopes at night.
> > > >
> > > > Does anybody know and can either point me somewhere where
> > > > to find this information - or have the information and
> > > > pass it on?
> > > >
> > > > Thanks in advance,
> > > > Maren Purves
> > > > East Asian Observatory
#include <vxWorks.h>
#include "epicsVersion.h"
#include "devSup.h"
#include "biRecord.h"

#define M48T_FLAGS    0x7ff0
#define M48T_FLAG_BAT   0x10

extern UCHAR sysNvRead(ULONG);

long M48T37ReadBatteryLow(biRecord *rec)
{
    rec->rval = sysNvRead(M48T_FLAGS) & M48T_FLAG_BAT ? 1 : 0;
    return 0;
}

struct {
    long        number;
    DEVSUPFUN   report;
    DEVSUPFUN   init;
    DEVSUPFUN   init_record;
    DEVSUPFUN   get_ioint_info;
    DEVSUPFUN   read;
} M48T37BatteryLow = {
    5,
    NULL,
    NULL,
    NULL,
    NULL,
    M48T37ReadBatteryLow
};

#ifndef BASE_VERSION
#include "epicsExport.h"
epicsExportAddress(dset, M48T37BatteryLow);
#endif

device(bi,         INST_IO, M48T37BatteryLow,  "M48T37BatteryLow")

record (bi, "$(IOC):BATTERY")
{
    field(DTYP, "M48T37BatteryLow")
    field(PINI, "YES") # battery status uptates at power-on only
    field(ZNAM, "OK")
    field(ONAM, "LOW")
    field(OSV,  "MINOR")
}