DS1620 Thermostat

Comments

• Andy Lindsay (Parallax) Posts: 1,919

  2005-02-20 15:43 edited 2005-02-20 15:43

  Pages 22 through 24 of those product docs show the codes that you can send the DS1620 to confitgure it. Take a closer look at page 24. The first six rows in the table look like they can be done in PBASIC like this:
  
  shiftout DQ,CLK,lsbfirst,[noparse][[/noparse]$0C, $00, $01, $0050 \ 16]
  PAUSE 10
  shiftout DQ,CLK,lsbfirst,[noparse][[/noparse]$21, $0014 \ 16]
  PAUSE 10
• achilles03 Posts: 247

  2005-02-21 00:23 edited 2005-02-21 00:23

  Here's some modified code I use. Sometimes on startup and after configuring, it will shiftout 0 the first time. I don't know if it's something with the chip or with my code, but here's what I use:
  
  DQ CON 4 'DS1620 DQ pin
  CLK CON 5 'DS1620 CLOCK pin
  RST CON 6 'DS1620 RST pin
  
  'DS1620 CONSTANTS
  WCONFIG CON $0C
  CPU CON %10
  CONT CON %00
  STARTC CON $EE
  STOPC CON $22
  RTEMP CON $AA
  
  'START DS1620
  LOW RST
  HIGH CLK
  PAUSE 100
  HIGH RST
  SHIFTOUT DQ,CLK,LSBFIRST,[noparse][[/noparse]WCONFIG,CPU+CONT]
  LOW RST
  PAUSE 50
  HIGH RST
  SHIFTOUT DQ,CLK,LSBFIRST,[noparse][[/noparse]STARTC]
  PAUSE 500
  
  GETTEMP:
  temp2=0
  HIGH RST
  SHIFTOUT DQ,CLK,LSBFIRST,[noparse][[/noparse]RTEMP]
  SHIFTIN DQ,CLK,LSBPRE,[noparse][[/noparse]temp2\9]
  LOW RST
  debug temp, cr
  pause 1000
  goto GETTEMP
• Tracy Allen Posts: 6,656

  2005-02-21 05:02 edited 2005-02-21 05:02

  I have a note on the thermostat mode posted at this URL:
  
  www.owlogic.com/OL2d1620.htm#thermostat
  
  ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
  Tracy Allen
  www.emesystems.com
• SteveD Posts: 64

  2005-02-25 05:06 edited 2005-02-25 05:06

  Thanks to everyone! I now have it working.
  Steve