Need help trying to get one program to use another to print to LCD????

mikediv · 2009-10-23 01:27

Hi guys I have 2 programs one is Andy Lindsay prop (((PstDisplayResistance.spin)) the other is LCD code I found in the Obex downloads. By themselves they both work just fine but I am trying to modify (((PstDisplayResistance.spin)) to print to an LCD instead of the PST ..

I first tried by making the LCD an Object and tried calling it from inside,(((PstDisplayResistance.spin)) no luck , I then tried tying them together no luck can anyone take a look at what I have and guide me please as usual thank you all for any help.

I had to attach them as files becuase when I tried to do a cut and paste it looked awful. I could also use some advice on how to post code from cut and paste that would look decent?

James Long · 2009-10-23 01:43

mikediv said...
Hi guys I have 2 programs one is Andy Lindsay prop (((PstDisplayResistance.spin)) the other is LCD code I found in the Obex downloads. By themselves they both work just fine but I am trying to modify (((PstDisplayResistance.spin)) to print to an LCD instead of the PST ..

I first tried by making the LCD an Object and tried calling it from inside,(((PstDisplayResistance.spin)) no luck , I then tried tying them together no luck can anyone take a look at what I have and guide me please as usual thank you all for any help.

I had to attach them as files becuase when I tried to do a cut and paste it looked awful. I could also use some advice on how to post code from cut and paste that would look decent?

I'll let the usual guru's help with the slicing....since I have to ask a bunch myself.....

The code must be put between

[noparse][[/noparse]code] tags [noparse][[/noparse] /code]  <----notice the extra space in there to let the tag show.

This is the only way to preserve the spacing.

James L

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
James L
Partner/Designer

Lil Brother SMT Assembly Services

Are you addicted to technology or Micro-controllers..... then checkout the forums at Savage Circuits. Learn to build your own Gizmos!

Post Edited (James Long) : 10/23/2009 3:38:21 PM GMT

StefanL38 · 2009-10-23 06:40

Hello Mike,

your LCD has a serial interface for controlling it.

Somehow the serial bitbanging towards the LCD has to be done.
This is done by a serial driver who cares about the details of the bitbanging
so you don't have to care about them.

In this case this is done by the oject "FullDuplexSerialPlus" short FDX+

LCD.SPIN uses FDX+
and PstDisplayResistance.spin uses FDX+

LCD.SPIN was made to communicate with an LCD which works at 9600 baud which is connected to PIN 15
and the code LCD.SPIN starts the serial driver FDX+ with the parameters mentioned above

CON
  pinLCD = 15

PUB StartLCD
...
 LCD.start(24, pinLCD, 0, 9600)

PstDisplayResistance.spin was coded to communicate with the PST.EXE over the Propplug (which use PIN 31,30 at 57600 baud

  debug.Start(31, 30, 0, 57600)              ' Start FullDuplexSerialPlus

the serial driver is your butler you call for "serving serial data" whatever the serial dat might be

Now I assume you want the LCD to show a resistance-value
therefore you DON'T need the PstRcDisplay.spin-file

You need the object that measures the resistance which is "RcResistance.spin"

and a PART of the code-LINES of PstDisplayResistance.spin

PUB Update(resistance) | strPtr                      ' Display resistance value
  'strPtr := fs.FloatToString(resistance)
  debug.tx(debug#HOME)
  debug.Str(String("R = "))
  debug.dec(resistance)
  'debug.Str(strPtr)
  debug.tx(debug#CLREOL)

the pub Update does the details to clear display show a title "R =" and show the value
in PstDisplayResistance.spin the serialdriver-object FDX+ has the name "debug"

if you put this code into your LCD.spin you have to rename the codelines that
they match with the name of the FDX+-object in your file LCD.spin which is

OBJ
  LCD    : "FullDuplexSerialPlus"

so to add the Pub update to LCD.SPIN it looks like this
but as R is delivered as Floating-point-value you have to use FloatToString

and add the floatstring-object to your code

OBJ
  fs      : "FloatString"

PUB Update(resistance) | strPtr                      ' Display resistance value
  strPtr := fs.FloatToString(resistance)
  LCD.tx(debug#HOME)
  LCD.Str(String("R = "))
  LCD.Str(strPtr)
  LCD.tx(debug#CLREOL)

and somewhere you have to add the measuring of the resistance itself

OBJ
  meter   : "RcResistance"                   ' MeasureTime.ASM is also an option

PUB Measure_Resistance                                               
  repeat                                     ' Repeat loop
    R := meter.Resistance                    ' Get resistance
    waitcnt(clkfreq/10 + cnt)                ' Display refresh 10 Hz
    Update(R)                             ' Update display

The code above are only code-snippets to show the principle it is not enough to copy & paste them together
try it and if it does not work come back with any questions you like

best regards

Stefan

Post Edited (StefanL38) : 10/23/2009 7:03:37 AM GMT

mikediv · 2009-10-23 22:43

Stefan thank you for always jumping in and helping , I really like the way to teach to fish instead of just eating for day LOL no really I am trying so hard to learn Spin I love this stuff and if I can program it opens a whole world of projects to me.
I am trying my best to digest this and will certainly have a question or two if you do not mind going forward just one for now I am not familiar with FDX+ can you give me the meaning? Does FDX+ refer to the fullduplexplus driver?
I am sorry I re-read your document and found it

Thank you

Oh James did you have a code formater ? for was it clusso?

Post Edited (mikediv) : 10/23/2009 10:57:34 PM GMT

James Long · 2009-10-23 22:47

mikediv said...
Stefan thank you for always jumping in and helping , I really like the way to teach to fish instead of just eating for day LOL no really I am trying so hard to learn Spin I love this stuff and if I can program it opens a whole world of projects to me.
I am trying my best to digest this and will certainly have a question or two if you do not mind going forward just one for now I am not familiar with FDX+ can you give me the meaning? Does FDX+ refer to the fullduplexplus driver?
Thank you

Oh James did you have a code formater ? for was it clusso?

Nope wasn't me....I'm not that deep into programming......must have been Clusso.

James L

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
James L
Partner/Designer
Lil Brother SMT Assembly Services

Are you addicted to technology or Micro-controllers..... then checkout the forums at Savage Circuits. Learn to build your own Gizmos!

StefanL38 · 2009-10-23 23:28

Hello Mike,

Yes I realy enjoy helping. (not much postings today I'm a little bored)

here is the code formatter it is from PhiPi.

Yes FDX+ is the short name for the F)ull-D)uplex-S)erial-Plus-driver (File FullDuplexSerialPlus.SPIN)

stored in folder C:\Program Files\Parallax Inc\Propeller Tool v1.2.6\Examples\PE Kit\6 - Objects Lab\FullDuplexSerialPlus.spin

best regards

Stefan

Need help trying to get one program to use another to print to LCD????

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