PropBASIC

caskaz

Hi, Guys.

I installed PropBasic(bst-0.19.1.exe & PropBasic-bst-00.00.87-47.exe)
I made sample(LED.pbas) But it don't work

OnTime CON 250
OffTime CON 750
IsOn CON 1
IsOff CON 0
LED PIN 0 LOW
idx VAR  LONG
DELAY_MS SUB 1

PROGRAM Start
Start:
 FOR idx = 1 to 3
   LED = IsOn
   DELAY_MS OnTime  <-- (36.33)
   LED = IsOff
   DELAY_MS OffTime  <-- (41.33)
 NEXT
 DELAY_MS 1_000  <-- (49.33)
 GOTO Start

SUB DELAY_MS
 PAUSE __param1
 ENDSUB

Compiling, there are errors.

LED (36.33)Error:Unresolved Symbol-__param1
LED (41.33)Error:Unresolved Symbol-__param1
LED (49.33)Error:Unresolved Symbol-__param1

How does it resolve?

Post Edited (caskaz) : 3/13/2010 5:22:57 AM GMT

Tony B.

caskaz,

I have attached a new code file. I believe this is what you are trying to accomplish. You can compare it to your code and see the changes. I tested it on my Propeller Professional Development Board, but it should work on any board or Propeller setup running on a 5mhz crystal

In future post it would be helpful to post what your setup is and attach your code as a file so others can download and easily look at it.

Hope this help gets you moving forward.

Tony

Post Edited (Tony B.) : 3/13/2010 4:37:34 AM GMT

caskaz

Thank you.

I forgot Device directive.
Although I had checked my code for several times....

caskaz

I have ona more question.
Although delta doesn't set initial value, it works.
PropBASIC set initial data at VAR directive?

DEVICE P8X32A,XTAL1,PLL16X
XIN 5_000_000

target VAR LONG
delta VAR LONG
LED PIN 0 HIGH

PROGRAM Start
Start:
RDLONG 0,delta
delta = delta >>1
taget = cnt + delta
DO
  TOGGLE LED
  WAITCNT target, delta
LOOP

Bean

The first thing you do is "RDLONG 0, delta" which will set "delta" to the current clock frequency.

Everything looks fine in your code to me. Why wouldn't it work ?

PropBASIC does NOT set any initial value to VARs unless you specify. Like "delta VAR LONG = 0". Otherwise it will have whatever value happens to be in memory at the time.

Thanks for giving PropBASIC a try, it looks like you are getting the hang of it already.

Bean

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Use BASIC on the Propeller with the speed of assembly language.

PropBASIC thread http://forums.parallax.com/showthread.php?p=867134

March 2010 Nuts and Volts article·http://www.parallax.com/Portals/0/Downloads/docs/cols/nv/prop/col/nvp5.pdf
·

caskaz

Bean.
Thank you for your reply.

PropBASIC code fine works.
I wonder statement of "RDLONG 0, delta".
Although I read "PropBASIC_Syntax_Guide_0x13", there was not such a thing.(set "delta" to the current clock frequency)

And there is words of viewing a 1-for-1 (from BASIC to Asm code) on Section"About PropBASIC", How can asembler codes watch?

Gerry Keely

caskaz

RDLONG 0, delta reads the first long in hub memery into delta.if you look at the spin compiler output you will see this.

For example assuming the clock is 80_000_000MHz, in hex this is 04-C4-B4-00,these should be the values stored in the first 4 hub mem locations



Gerry

Post Edited (Gerry Keely) : 3/15/2010 10:31:35 AM GMT