New User Questions

JohnP

Just getting started with Propeller on the Demo board and have a couple
of questions:

1. The very first demo program, Output.spin, works fine, for
pins 16 or 17. Changing the pin number to 18, for instance,
causes to LEDs to blink. Explanation ?

2. Does anyone have timing information for the math functions,
i.e. number of cycles, just roughly.


Thanks,
John-

JohnP

Sorry, I solved the first question - you know how
it is with new users (enthusiastic but clueless).

John-

stevenmess2004

Which math functions, assembler or spin? The number of cycles for all the assembler instructions are in the data sheet and manual (all 4 cycles). The spin instructions are around 40 to 100 times slower. If you want to find out do something like this

PUB test(num1,num2):temp1,temp2,temp3
  temp1:=cnt
  temp3:=num1+num2
  temp2:=cnt
  return temp2-temp1

Something to be careful of is that this will take different amounts of time depending on where the variables are.

JohnP

Thanks for the reply.

I saw the assembler cycles; should have mentioned
I was curious about the Spin cycles.

I have tested in the way you suggest in other languages, however,
I'm just getting started with Spin and I'm not an adept programmer
in any language.

Thanks,
John-

Cluso99

Try the VGA Demo - it's magic

Ken Peterson

speaking of spin cycles....has anyone made a propeller based washing machine?

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tpw_man

@Ken Peterson
LOL, but I do not think so.

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I am 1011, so be surprised!


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Oldbitcollector (Jeff)

Ken Peterson said...
speaking of spin cycles....has anyone made a propeller based washing machine?

Oh no! I'm not going there.. Then I've have one more task to do before I can play with the Propeller. [noparse]:)[/noparse] [noparse]:)[/noparse]

OBC

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