Compilers: Passing constants between objects - my stupid error!
Cluso99
Posts: 18,071
I decided to remove the hardware definitions to a seperate file called hwdef.spin
However, this failed and I am at a loss to understand why. The same happens on both PropTool and bst. The problem was the lack of parenthesis (see posts below).
This is a good solution to decouple some constants into a seperate definition file.
I have attached a sample program, but here is a summary...
The line term.str(serPins,8) outputs the expected value $00001E1F whereas term.str(hw#serPins,8) contains $00000000 indicating the constant has not been passed between objects.
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If this is not intended to work, is there another way to decouple the hardware definitions ???
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· Home of the MultiBladeProps: TriBlade,·RamBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: CPUs Z80 etc; Micros Altair etc;· Terminals·VT100 etc; (Index) ZiCog (Z80) , MoCog (6809)·
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Post Edited (Cluso99) : 2/17/2010 4:50:42 AM GMT
However, this failed and I am at a loss to understand why. The same happens on both PropTool and bst. The problem was the lack of parenthesis (see posts below).
This is a good solution to decouple some constants into a seperate definition file.
I have attached a sample program, but here is a summary...
'hwdef.spin contains.... con rxPin = 31 'serial txPin = 30 baud = 115200 serPins = (_clkfreq / baud) << 16 | txPin << 8 | rxPin 'fixed: added parenthesis
'PassConst.spin contains...
con
rxPin = 31
txPin = 30
baud = 115200
serPins = txPin << 8 | rxPin
obj
hw : "_hwdef" 'hardware pin definitions etc
term : "FullDuplexSerial"
pub Main | err, p
waitcnt(clkfreq*2 + cnt)
'start standard output driver...
if term.start( rxPin, txPin, 0, baud )
waitcnt(clkfreq*2 + cnt)
term.tx(0)
term.str( string("========== PassConst ==========", 13) )
term.str( string(" serial @ pins ") )
term.hex( serPins, 8 )
term.str( string(13, " hwdef @ pins ") )
term.hex( hw#serPins, 8 )
term.tx( 13 )
The line term.str(serPins,8) outputs the expected value $00001E1F whereas term.str(hw#serPins,8) contains $00000000 indicating the constant has not been passed between objects.
·
If this is not intended to work, is there another way to decouple the hardware definitions ???
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Links to other interesting threads:
· Home of the MultiBladeProps: TriBlade,·RamBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: CPUs Z80 etc; Micros Altair etc;· Terminals·VT100 etc; (Index) ZiCog (Z80) , MoCog (6809)·
· Prop OS: SphinxOS·, PropDos , PropCmd··· Search the Propeller forums·(uses advanced Google search)
My cruising website is: ·www.bluemagic.biz·· MultiBlade Props: www.cluso.bluemagic.biz
Post Edited (Cluso99) : 2/17/2010 4:50:42 AM GMT
Comments
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Operator precedence is <<, | then /. Try this:
serPins = (_clkfreq / baud) << 16 | txPin << 8 | rxPin
and it will work. As it was, it was being interpreted as
serPins = _clkfreq / (baud << 16 | txPin << 8 | rxPin)
-Phil
I didn't see that one coming. Thanks kuroneko & Phil - fixed
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Links to other interesting threads:
· Home of the MultiBladeProps: TriBlade,·RamBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: CPUs Z80 etc; Micros Altair etc;· Terminals·VT100 etc; (Index) ZiCog (Z80) , MoCog (6809)·
· Prop OS: SphinxOS·, PropDos , PropCmd··· Search the Propeller forums·(uses advanced Google search)
My cruising website is: ·www.bluemagic.biz·· MultiBlade Props: www.cluso.bluemagic.biz