Re: Sequencer seem to skip states with EPICS 3.16.1

[Ralph Lange <ralph.lange@gmx.de>]

Have a look at

http://www-csr.bessy.de/control/SoftDist/sequencer/Tutorial.html#asynchronous-use-of-pvput

I think the SYNC option of pvPut(), which turns it into a blocking call, might help.

Cheers,
~Ralph

On Wed, Jan 31, 2018 at 10:01 AM, Simon Reiter <Simon.P.Reiter@physik.uni-giessen.de> wrote:

On 01/31/2018 09:42 AM, Ralph Lange wrote:

Sorry, you lost me there.

The SNL compiler takes SNL source and produces C code. What do you mean by "the state machine is implemented in C++"?

Sorry, the C== part is external and should not influence the code. Forgot, what I just said.

In your original message you said that the 'camonitor' utility only shows READY -> RUNNING. So you seem to have a PV (I assume a local EPICS record) that is supposed to show the state.

In your SNL code excerpt there is no mention of such PV or when and how it is updated.

Please show all handling of that status PV in order to get feedback on it.

Here it goes:

#define SET_PV(pv_variable, value) \
{ \
    pv_variable = value; \
    pvPut(pv_variable); \
}
%%enum { State_UNKNOWN = 0, State_NOT_READY = 1, State_READY = 2, State_RUNNING = 3, State_LOADING=4, State_UNLOADING=5, State_STARTING=6, State_STOPPING=7, State_ABORTING=8, State_ERROR=11 };
int ERROR = FALSE;

ss onsenhw {
  state S_READY {
    entry {
      SET_PV(pv_state_current, State_READY);
      ERROR = FALSE;
    }
    when(pv_state_requested == State_RUNNING) {
    } state S_STARTING
  }
  state S_STARTING {
    entry {
      SET_PV(pv_state_current, State_STARTING);
    }
    when(!ERROR && pv_allow_running) {
    } state S_RUNNING
    when(pv_state_requested == State_READY) {
    } state S_STOPPING
  }

  state S_RUNNING {
    entry {
      SET_PV(pv_state_current, State_RUNNING);
      ERROR = FALSE;
    }
   ...
  }

I hope, this helps.

Cheers,
Simon