display time in debug

Comments

• Mike G Posts: 2,702

  2011-02-20 06:21 edited 2011-02-20 06:21

  The STAMP generates the serial stream to the debug window. You would need a real time clock somewhere in the loop. The RTC could be connected to the STAMP or the STAMP could get the time form another system that has a clock..
• Stampmyster Posts: 27

  2011-02-20 07:23 edited 2011-02-20 07:23

  Hello,
  
  I think you might want to hook up a DS1302 Timekeeping Chip.They sell them in the Parallax store.
  
  They are inexpensive and easy to use. If you use a battery with it, it will remember the time. (There is a battery charging circuit built in.)
  
  Good Luck!
• erco Posts: 20,261

  2011-02-20 14:34 edited 2011-02-20 14:34

  Per the replies here, there's no built-in RTC in a Stamp. You can fake a clock by writing a program with multiple nested pauses and DEBUG statements. With patience, you can get it reasonably accurate for a while, but it will eventually drift since there is no thermal compensation.
• chasing Posts: 14

  2011-02-21 02:21 edited 2011-02-21 02:21

  I had a feeling of that. I couldn't find any commands relating to time display, so I figured I would have to add a circuit. Thank you all for your help.
• erco Posts: 20,261

  2011-02-21 08:21 edited 2011-02-21 08:21

  Here's your cheapest option to get the time displayed on your screen.
  http://cgi.ebay.com/2-ROUND-CLOCK-STICK-RED-BLUE-WHITE-GREY-/180593298984?pt=LH_DefaultDomain_0&hash=item2a0c330e28
• chasing Posts: 14

  2011-02-21 13:10 edited 2011-02-21 13:10

  @Erco: LOL.
  
  My plan is to have the time displayed on the debug screen when an event is triggered ( servo spins, RFID card is swiped, programmer's wife starts nagging, etc). I looked at the DS1302 and will be picking up one as well as the 32.768 KHz crystal.
• erco Posts: 20,261

  2011-02-21 13:53 edited 2011-02-21 13:53

  I built an electromechanical gizmo for a friend that goes off every hour, like a clock chiming. I used a $10 wristwatch with a "chime" function. The voltage to the piezo beeper was high enough to trigger the input pin on the EMC uC that runs the whole sequence. It's running strong 3 years later, same watch battery, and the accuracy is incredible, it's always within a few seconds of my computer's internet time. I've considered using that hourly chime method to recalibrate a Stamp software clock every hour. It would be easy to write a clock program that wouldn't drift more than a few seconds per hour, and that error goes away every hour. Food for thought.
• electrosys Posts: 212

  2011-02-21 15:39 edited 2011-02-21 15:39

  Here is an easy code for showing time on Parallax serial LCD, you have to change the SEROUT to Debug command, for show the time on Debug screen.
  

  ' Example Program: Parallax, ClockApp.bs2 
  ' Display elapsed time with BS2 and Parallax Serial LCD.
  
  ' {$STAMP BS2}                              ' Stamp directive
  ' {$PBASIC 2.5}                               ' PBASIC Directive
  
  hours          VAR     Byte                  ' Stores hours
  minutes      VAR     Byte                  ' Stores minutes
  seconds      VAR     Word                 ' Stores 1/10 seconds
  
  SEROUT 14, 84, [22, 12]                   ' Start LCD & clear display
  PAUSE 5                                         ' Pause 5 ms for clear display
  SEROUT 14, 84, ["Time Elapsed...", 13]       ' Text + carriage return
  SEROUT 14, 84, ["  h    m    s"]           ' Text on second line
  DO                                                    ' Main routine
  
   ' Calculate hours, minutes, seconds
  IF seconds = 60 THEN seconds = 0: minutes = minutes + 1
  IF minutes = 60 THEN minutes = 0: hours = hours + 1
  IF hours   = 24 THEN hours   = 0
  
  ' Display digits on LCD on line 2.  The values 148, 153, 158
  ' place the cursor at character 0, 5, and 10 for the time values.
  
  SEROUT 14, 84, [148, DEC2 hours,153, DEC2 minutes,158, DEC2 seconds ]
  
  PAUSE 991                                  ' Pause + overhead ~ 1 second
  seconds = seconds + 1                      ' Increment 1/10 second counter
  LOOP                                         ' Repeat main routine
  
• deltaboss Posts: 10

  2011-02-24 05:49 edited 2011-02-24 05:49

  wow this is truly awsome if I were to extrapolate on this how would i go about adding days