16,32 bit right and left shift

[Marcoos]

Hello

I need help with a math question.
I'm reading an analog input, and now also on the micro 8-bit analog converters are 10/12 bit. When I read the value I have to do an average, and would be good to use the shift (I read all the posts on the subject), 1, 2, etc.. that is left to right for the various mathematical operations to base 2. over the integers.
In C there is the << and >> they do also on the integers, and the long, do not know if there are special commands in asembler that they do, but usually the shift is much more compact in code that division or multiplication.
Any help is welcome, Thaks, Marco

[Anobium]

This may help. http://gcbasic.sourceforge.net/help/average.htm

There is a function that will average two numbers.

Anobium

[Marcoos]

Anobium good evening
Thanks as always for your assistance, I have seen this command, and also rotate, but only work on bytes, I downloaded the manual of AVR assembler and I'm investigating but as you know at this level is quite difficult for me.
In the meantime, if anyone has some more information, so be it. Thanks, Marco

[Anobium]

Two functions I have in my own utils.h file, uf_shift and uf_shift_long. You need the two defines.

Usage example: w_addrH = uf_shift ( w_addr, 8, >> )

~~~~

define << 0

define >> 1

' using uf_shift to ensure we do not clash with any potential PUBLIC method.
Function uf_shift ( l_invar as word , l_rotateval, l_direction ) as word

for ul_loop = 1 to l_rotateval
    set C off
    if l_direction  = 1 then
        rotate l_invar RIGHT
    else
        rotate l_invar LEFT
    end if
next
uf_shift = l_invar

end function

' using uf_shift to ensure we do not clash with any potential PUBLIC method.
Function uf_shift_long ( l_invar as Long , l_rotateval, l_direction ) as Long

for ul_loop = 1 to l_rotateval
    set C off
    if l_direction  = 1 then
       rotate l_invar RIGHT
    else
         rotate l_invar LEFT

    end if

next
uf_shift_long = l_invar

end function

[Marcoos]

Thanks Anobium
This night I study this

[Anobium]

and, then today. I remembered the code from the F1 Evaluation Port of last year.

This has an average function.... this may help.

~~~~~
Dim g_average As Long

Function input_pot( Optional ccount As byte = 2 ) as word
    g_average = 0
for lloop = 1 to ccount
    g_average = [Long] g_average + [Long] ReadAD10(ADCPort)
next
g_average = [Long]g_average  /  [Long]lloop
input_pot = g_average
' use the three LED's to show the ADC value
select case g_average
    case < 200
    set led1 off
    set led2 off
    set led3 off
    set led4 off
  case < 400
    set led1 on
    set led2 off
    set led3 off
    set led4 off
  case < 600
    set led1 on
    set led2 on
    set led3 off
    set led4 off
    case < 800
    set led1 on
    set led2 on
    set led3 on
    set led4 off
  case => 800
    set led1 on
    set led2 on
    set led3 on
    set led4 on
end select

End Function