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steveizett
Newbie

Joined: 15/05/2012
Location: Australia
Posts: 21

Posted: 11:58pm 31 Aug 2016

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Hi guys
I'm playing with a hx711 and need to implement the following code.

for (i=0;i<24;i++){
ADSK=1;
Count=Count<<1;
ADSK=0;
if(ADDO) Count++;
}
ADSK=1;
Count=Count^0x800000;
ADSK=0;
return(Count);

How do I shift left as in "Count<<1"
I see in the manual a reference to RShift = nbr\(2^bits)

Thanks very much.
Steve

MicroBlocks

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Joined: 12/05/2012
Location: Thailand
Posts: 2209

Posted: 01:32am 01 Sep 2016

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Shifting one bit to the left is the same as multiplying by 2.

However the code you posted should work with a little modification as MMbasic does support shifting and XOR'ing.
From the manual page 49.
(Make sure the Count variable is an INTEGER!)
[code]
Shift operators:
x << y x >> y These operate in a special way.

<< means that the value returned will be the value
of x shifted by y bits to the left while

>> means the same only right shifted.
They are integer functions and any bits shifted
off are discarded and any bits introduced are set to zero.
[/code]
The ^ operator is called XOR in MMBasic.
(You can find that on the same page).

Edited by MicroBlocks 2016-09-02

Microblocks. Build with logic.

twofingers

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Joined: 02/06/2014
Location: Germany
Posts: 1773

Posted: 01:40am 01 Sep 2016

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@steveizett

LShift = nbr *(2^bits)

I think (AFAIK) the MMBasic (4.5) for Maximites has no shift operators.
... also no integers.

Regards
MichaelEdited by twofingers 2016-09-02

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Look on my works, ye Mighty, and despair!‘
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MicroBlocks

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Joined: 12/05/2012
Location: Thailand
Posts: 2209

Posted: 01:45am 01 Sep 2016

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Oops, missed the Maximite reference in the topic.

Just use:
[code]
Count = Count * 2
[/code]

Microblocks. Build with logic.

TassyJim

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Joined: 07/08/2011
Location: Australia
Posts: 6607

Posted: 12:43pm 01 Sep 2016

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Remember that you are limited to about 23 bits for integers in 32 bit floating point.

Jim

VK7JH
MMedit

steveizett
Newbie

Joined: 15/05/2012
Location: Australia
Posts: 21

Posted: 01:13pm 01 Sep 2016

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Thanks guys for the help
Sounds like I need to use micromite for this app.
Cheers
Steve

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