AP-8 Reset

[Jadams]

Sometimes I switch off the AP-8 to disable the sound.  When I turn it back on I have to restart the program.  Is there a way to reset the AP-8 or will I always have to restart the program?

[Jadams]

A little more information on the above reset issue.

I switch off the AP-8 and leave the Prop 1 on to control other I/Os.  When I power up the AP-8, I have to reload the program to get the sound files to play.  Anyway around this?

[JonnyMac]

The AP-8 resets itself on power-up, so there's no manual way to do that.  If you want to reset the Prop-1 while it's running, press the reset button.  If the sound start is at the beginning of the program then you should here it play.  You don't have to reload the program into the Prop-1 unless you change it.

[JackMan]

Jim,
    If you need to disable the audio from the AP-8 without killing the power you can use a SPDT relay. Connect the audio out from the AP-8 to the N.C. contacts of the relay, when you energize the relay it will stop the audio. If you have an extra OUT on the Prop-1 you could control the relay from there.

[Jadams]

I think your right as I have this subroutine in my code:

Let_AP8_Finish:
  SEROUT Sio, Baud, ("!AP8", %00, "G")          ' get status
  SERIN  Sio, Baud, status
  IF playing = Yes THEN Let_AP8_Finish
  RETURN

When I kill the power I think the Prop 1 locks up when it can't complete the program, hence the reload to get it running again.  In my case a manual SPST switch on the audio line will do the trick.

Thanks

[JonnyMac]

Yes, the if Prop-1 is sitting on a SERIN and you kill the AP-8 then the program will hang.  If you reset the Prop-1 then you can recover.