Bits, Bytes Words and Arrays

[Archangel]

Hi Mike,
Opinions are what makes for horse races. Everyone starts out as a newbie, and people learn at different rates. Those are Facts, added to my opinion above. You have a great day! I choose not to argue.
JS
Edit: Melanie did this forum a service with this and nearly all of her posts, I say nearly, because Nobody is ever always or never.

[vilaprinyo]

This is working in Pic Basic:

For MyVar=0 to 15
MyBit=MyWord.0(MyVar)
LCDOut $FE,1,"Bit ",#MyVar,"=",MyBit
Pause 2000
Next MyVar

But I can not get to work in Pic Basic Pro

I need to read/write some bits from/to a word variable and this method was very useful.

Any ideas?

Many thanks,

Ricard.

[HenrikOlsson]

Hi,
It works perfectly fine here. I had to add a # in the LCDOUT statementin order to have it actually display "1" or "0" but apart from that it works as I'd exect it to.

MyVAR VAR BYTE
MyWord VAR WORD
MyBIT VAR BIT
 
MyWORD = %1010101010101010
 
For MyVar = 0 to 15
  MyBit = MyWord.0(MyVar)
  LCDOut $FE, 1, "Bit " ,#MyVar, "=", #MyBit
  Pause 2000
Next MyVar

/Henrik.

[vilaprinyo]

Henrik,

Thanks for your help. I not tried exaktly this (i have no LCD)

I tried this:

MR var word: H var byte

for H=0 to 15
MR.0[H]=1 'set bit H of MR
next H

This works fine in PicBasic but when compiling in PicBasicPro this bits never are set. Other things in my code (about 8k) works perfect. I have only problems when adressing bits form words or bytes

Maybe I have a library instalation problem?

[HenrikOlsson]

Hi,
That is weird.... This code:

MR var word: H var byte
 
MR = 0
HSEROUT ["First, all zeros:",13]
HSEROUT ["MR = ", BIN16 MR,13,13]
 
MR=65535
HSEROUT ["Then, all ones:",13]
HSEROUT ["MR = ", BIN16 MR,13,13]

for H=0 to 15
    MR.0[H]=0  'reset bit H of MR
next H
HSEROUT ["Next, all zeros again:",13]
HSEROUT ["MR = ",BIN16 MR,13,13]
 
for H=0 to 15
  MR.0[H]=1 'set bit H of MR
next H
HSEROUT ["And finally, all ones:",13]
HSEROUT ["MR = ", BIN16 MR,13,13]
 
Pause 10
END

Produces the following result on the serial terminal:

First, all zeros:
MR = 0000000000000000
 
Then, all ones:
MR = 1111111111111111
 
Next, all zeros again:
MR = 0000000000000000
 
And finally, all ones:
MR = 1111111111111111

The FOR-NEXT loop is copy-pasted from your post above. How do you know it's not setting the bit? Do you have serial line to which you can send the data as above? Is there any chanse something else in the program is resetting/changing MR before you have chanse to see it? What version of PBP? (I'm using 2.60)

/Henrik.

[vilaprinyo]

Thanks,

I tried to run the isolated code and it works. :S
I'm sorry. I tested only the complete program before.

Sure the problem is in the code between. the weird is it works compiled with PicBasic and not when compiled with PicBasicPro.

I will check possible causes...

Thanks again.

Ricard.

[vilaprinyo]

Hello,

I have more information.

I started commenting all the lines between this code, resulting the same. MR value is 0.
Next, I continued commenting all the lines outside this code. Result the same. MR value is 0.
Finally, I decided to comment step by step my array variables.

After 2 o 3 arrays commented I get MR=65535.

I repeated this process commenting other variables randomly with the same result. After 2 o 3 steps MR=65535.

My code is about 8k over a Pic16F877. Very fair but fits.

My conclusion is PicBasicPro compiler needs more memory for variables than PicBasic.

The weird is why the compiler gives no errors...

Many thanks,

Ricard.