Hi Les,
Device 18F26K22, xtal 64
The following is not working: -
dim Roll as sword = 0
Dim Pitch as as sword = 0
'---------------------------------------------
Main:
Test(0, 0)
delayms 500
goto main
'-------------------------------------------------------------------
proc Test(roll as sbyte, pitch as sbyte)
If Roll <= -135 then
Print at 1,1, "Roll ", sdec roll
Print at 2,1, "Pitch ", sdec pitch
endif
endProc
As Roll is greater than -135, i.e. 0, it should not Print
As a workaround I used: -
dim Roll as sword = 0
Dim Pitch as as sword = 0
'---------------------------------------------
Main:
Test(0, 0)
delayms 500
goto main
'-------------------------------------------------------------------
proc Test(roll as sbyte, pitch as sbyte)
dim sTemp as sword = -135
If Roll <= sTemp then
Print at 1,1, "Roll ", sdec roll
Print at 2,1, "Pitch ", sdec pitch
endif
endProc
This does not print as expected as Roll is greater -135.
Regards
Joe
The SBYTE variable cannot be less than -127. This is not possible. It's unreasonable.
For
If Roll <= -135 thento work, the Roll value must be less than -134, for example -135 or -140.
Add>> So I mean the procedure variable sbyte is wrong.
I think you are correct.
The confusion i made was that variable roll is used as global and local.
But I expected that as roll is 0, both the local and global Roll, to work.
But to be honest, I made a mistake declaring local variable as sbyte.
Will test again when at the pc.
Regards
Joe
Yasin is correct. Signed variables are 2's complemented types, so a signed 8-bit variable can hold -128 to 127. Signed 16-bit variables can hold -32768 to 32767, and signed 32-bit variables can hold -2147483648 to 2147483647.