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Constituent: ths4ddt     Tag: rad750

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THS_ddt.c File Reference

A cut-down version of THS compatible with DDT. More...

#include <stdio.h>
#include <time.h>
#include "PBS/INT.ih"
#include "PBS/PTS.h"
#include "PBS/WCT.h"
#include "PBS/WUT.h"
#include "MSG/MSG_pubdefs.h"
#include "THS/THS.h"
#include "THS/THS_msgs.h"

Include dependency graph for THS_ddt.c:


Functions

void THS_alignPPS ()
 Dummy routine.
unsigned int THS_cpuSetWarning (unsigned int expectedClkHz, unsigned int expectedDeltaClkHz)
 Dummy routine.
WCT_time THS_gemAbsTimeEvent (int gemStrobeIn, int gemClk)
 Dummy routine.
unsigned int THS_gemSetWarning (unsigned int expectedClkHz, unsigned int expectedDeltaClkHz)
 Dummy routine.
unsigned int THS_init (int mask)
 Dummy routine.
unsigned int THS_prevTimetoneFromEvent (int gemStrobeIn, int *absTimeSecs, int *flags, int *absTimeSecsPrev, int *flagsPrev, int *gemStrobeInPrev)
 Dummy routine.
unsigned int THS_prevTimtoneFromEvent (int gemStrobeIn, int *absTimeSecs, int *flags, int *absTimeSecsPrev, int *flagsPrev, int *gemStrobeInPrev)
 Dummy routine.
void THS_setGemUpdateMsgs (int maxMsgs)
 Dummy routine.
void THS_setPpsWarnEvery (unsigned int warnPpsEvery)
 Dummy routine.
void THS_setSlaveSend (THS_SendSlaveRtn rtn, void *arg, int lsmID)
 Dummy routine.
void THS_setTimetoneWarnEvery (unsigned int warnTimetoneEvery)
 Dummy routine.
unsigned int THS_slaveProcessMsg (int func, void *payload, unsigned int len)
 Dummy routine.
void THS_stats ()
 Dummy routine.
unsigned int THS_timetone (unsigned int absTimeSec, unsigned short saFlags)
 One-time set the wall clock time.
unsigned int THS_timetoneFromEvent (int gemStrobeIn, int *absTimeSec, int *flags)
 One-time set the wall clock time.
unsigned int THS_wait ()
 Dummy routine.

Variables

unsigned int THS_ths4ddt
 Unique identifier for the ths4ddt constituent.

Detailed Description

A cut-down version of THS compatible with DDT. 

CVS $Id: THS_ddt.c,v 1.1 2006/05/12 22:42:10 apw Exp $
Author:
A.P.Waite
DDT cannot be run together with the full THS service.

The full THS service is predicated in the idea that a set of RAD750 PIDs configured as a timer will run in lock step the the timebase register in the RAD750 CPU. This is not a valid assumption when DDT starts changing clock frequencies.

THS services are sufficiently sophisticated that modifying them to survive CPU clock frequency changes is non-trivial. As DDT is a very "niche" operation, the more pragmatic approach adopted here is to provide a cut-down THS service that is compatible with DDT. The price is that while running with the cut-down service, wall-clock time will not be set very accurately (about 1/10 of a second), and will therafter wander with the drifts in the CPU clock oscillator. For the duration of a DDT SUROM burning operation (and assuming that the CPU was previously running at full rate), wall clock time as reported by the CPU will run a factor of two slower than "real time".

Function Documentation

void THS_alignPPS (   ) 
 

Dummy routine.

For compatibility with the THS_alignPPS() entry point in THS proper.

unsigned int THS_cpuSetWarning (  unsigned int  expectedClkHz,
unsigned int  expectedDeltaClkHz
) 
 

Dummy routine.

Parameters:
expectedClkHz (none) Ignored
expectedDeltaClkHz (none) Ignored
Return values:
0 Always
For compatibility with the THS_cpuSetWarning() entry point in THS proper.

WCT_time THS_gemAbsTimeEvent (  int  gemStrobeIn,
int  gemClk
) 
 

Dummy routine.

Parameters:
gemStrobeIn (none) Ignored
gemClk (none) Ignored
Return values:
0LL Always
For compatibility with the THS_gemAbsTimeEvent() entry point in THS proper.

unsigned int THS_gemSetWarning (  unsigned int  expectedClkHz,
unsigned int  expectedDeltaClkHz
) 
 

Dummy routine.

Parameters:
expectedClkHz (none) Ignored
expectedDeltaClkHz (none) Ignored
Return values:
0 Always
For compatibility with the THS_gemSetWarning() entry point in THS proper.

unsigned int THS_init (  int  mask  ) 
 

Dummy routine.

Parameters:
mask (none) Ignored
Return values:
0 Always
For compatibility with the THS_init() entry point in THS proper.

unsigned int THS_prevTimetoneFromEvent (  int  gemStrobeIn,
int *  absTimeSecs,
int *  flags,
int *  absTimeSecsPrev,
int *  flagsPrev,
int *  gemStrobeInPrev
) 
 

Dummy routine.

Parameters:
gemStrobeIn (none) Ignored
absTimeSecs (none) Ignored
flags (none) Ignored
absTimeSecsPrev (none) Ignored
flagsPrev (none) Ignored
gemStrobeInPrev (none) Ignored
Return values:
THS_NOINIT Always
For compatibility with the THS_prevTimetoneFromEvent() entry point in THS proper.

unsigned int THS_prevTimtoneFromEvent (  int  gemStrobeIn,
int *  absTimeSecs,
int *  flags,
int *  absTimeSecsPrev,
int *  flagsPrev,
int *  gemStrobeInPrev
) 
 

Dummy routine.

Parameters:
gemStrobeIn (none) Ignored
absTimeSecs (none) Ignored
flags (none) Ignored
absTimeSecsPrev (none) Ignored
flagsPrev (none) Ignored
gemStrobeInPrev (none) Ignored
Return values:
THS_NOINIT Always
For compatibility with the THS_prevTimtoneFromEvent() entry point in THS proper.

void THS_setGemUpdateMsgs (  int  maxMsgs  ) 
 

Dummy routine.

Parameters:
maxMsgs (none) Ignored
For compatibility with the THS_setGemUpdateMsgs() entry point in THS proper.

void THS_setPpsWarnEvery (  unsigned int  warnPpsEvery  ) 
 

Dummy routine.

Parameters:
warnPpsEvery (none) Ignored
For compatibility with the THS_setPpsWarnEvery() entry point in THS proper.

void THS_setSlaveSend (  THS_SendSlaveRtn  rtn,
void *  arg,
int  lsmID
) 
 

Dummy routine.

Parameters:
rtn (none) Ignored
arg (none) Ignored
lsmID (none) Ignored
For compatibility with the THS_setSlaveSend() entry point in THS proper.

void THS_setTimetoneWarnEvery (  unsigned int  warnTimetoneEvery  ) 
 

Dummy routine.

Parameters:
warnTimetoneEvery (none) Ignored
For compatibility with the THS_setTimetoneWarnEvery() entry point in THS proper.

unsigned int THS_slaveProcessMsg (  int  func,
void *  payload,
unsigned int  len
) 
 

Dummy routine.

Parameters:
func (none) Ignored
payload (none) Ignored
len (none) Ignored
Return values:
0 Always
For compatibility with the THS_slaveProcessMsg() entry point in THS proper.

void THS_stats (   ) 
 

Dummy routine.

For compatibility with the THS_stats() entry point in THS proper.

unsigned int THS_timetone (  unsigned int  absTimeSec,
unsigned short  saFlags
) 
 

One-time set the wall clock time.

Parameters:
absTimeSec (none) Ignored
saFlags (none) Ignored
Return values:
0 Always
The only routine in THS/DDT that actually does any work. The first time this routine sees a timetone message, it will attempt to set wall-clock time (none too accurately, probably good to about 1/10 second), and call WUT_sys_adjust() to get all extant timeouts adjusted. After that, wall clock time simply free- wheels based on the CPU clock (which DDT will likely adjust).

unsigned int THS_timetoneFromEvent (  int  gemStrobeIn,
int *  absTimeSec,
int *  flags
) 
 

One-time set the wall clock time.

Parameters:
gemStrobeIn (none) Ignored
absTimeSec (none) Ignored
flags (none) Ignored
Return values:
THS_NOINIT Always
For compatibility with the THS_timetoneFromEvent() entry point in THS proper.

unsigned int THS_wait (   ) 
 

Dummy routine.

For compatibility with the THS_wait() entry point in THS proper.

Variable Documentation

unsigned int THS_ths4ddt
 

Unique identifier for the ths4ddt constituent.

This variable is made available for lookup through the .cidc file for the ths4ddt constituent -only-. It is designed as a safety check. If DDT attempts to look up this symbol and fails, DDT knows that it does not have the right version of THS loaded.

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