Averaging READings BYTEs etc

Pommie said:

As oshonsoft doesn't have signed integers then you need to do something different. Midnight here now but I'll try and work something out tomorrow.

Mike.

Click to expand...

Hi P,
Sleep well, but check in the morning, in case J's done it ok.
C

This topic seems to linger... With a certain periodicity with camerart
2016

2018

2020
This thread.

gophert said:

This topic seems to linger... With a certain periodicity with camerart
2016

PIC basic to Oshonsoft conversion

Hi, I'm trying to convert a piece of code written in PIC Basic to Oshonsoft basic, below: I get most of it, apart from 'ABS' and e,g, the decimal point in 'Distance.15' and the numbers 13 and 15. Any help appreciated. Camerart. Position VAR WORD Target VAR WORD Distance VAR WORD Position =...

www.electro-tech-online.com

2018

Twos compliment in Oshonsoft and Compass calibration

Hi, I've asked a similar question in another thread, but this is to clarify a point. I am getting results of a HIGH BYTE and a LOW BYTE. The D/S points out that these are in 'twos compliment form' Am I correct that these two BYTEs must be converted to a WORD, then 'twos complimented' or are...

www.electro-tech-online.com

2020
This thread.

Click to expand...

Hi G,
Like a goldfish in a big bowl. See you in 2023

C

jjw said:

Dim Xavg as single
Dim Yavg ...
Dim Xavg ...
......

Xavg=0
Yavg=0
Xavg=0

For j=1 to 10 ' for example average of 10 readings
for I = 0 to 18
....

Next I

Xnc=
Ync=
Znc=

Xavg=Xavg+Xnc
Yavg=....
Xavg=....
Next j

Xavg=Xavg/10
Yavg = ...
Xavg= ....

Click to expand...

Hi J,
Something like this?:
C.

Move the 2's complement conversions.
Xnc=Xraw
Ync ...
Znc...

<--------- conversions here

Xavg=Xavg+Xnc
......

jjw said:

Move the 2's complement conversions.
Xnc=Xraw
Ync ...
Znc...

<--------- conversions here

Xavg=Xavg+Xnc
......

Click to expand...

Hi J,
Is this correct?:
C
_________________________________________________
Ready!
AT+C002
1082730.12,-110.19,:827302.00
1082510.25,-121.71,:825103.00
1082293.50,-117.87,:822936.00
1082075.00,-125.98,:820750.00
1081853.00,-125.39,:818530.00
1081633.50,-123.93,:816336.00
1081413.25,-116.89,:814133.00
1081195.00,-123.88,:811951.00
1080976.25,-123.18,:809763.00
1080758.62,-116.31,:807587.00
1080539.87,-121.03,:805399.00
1080316.50,-122.30,:803165.00
1080101.87,-121.63,:801019.00
1079883.37,-126.66,:798834.00
1079662.50,-124.66,:796626.00
1079438.75,-119.26,:794388.00
1079219.25,-119.62,:792193.00
1079001.50,-124.56,:790015.00
1078782.00,-123.45,:787821.00
1078561.50,-120.14,:785615.00
1078343.87,-120.81,:783439.00
1078124.00,-123.48,:781241.00
1077904.00,-123.84,:779040.00
1077688.37,-121.58,:776884.00
1077470.25,-125.65,:774703.00
1077251.25,-118.36,:772513.00

_________________________________________________

The values are too big.
Move
Xavg=0
Yavg=0
Zavg=0
Inside Main, before for j=1 to 10

jjw said:

The values are too big.
Move
Xavg=0
Yavg=0
Zavg=0
Inside Main, before for j=1 to 10

Click to expand...

Hi J,
Is this better?:
Search for WRONG in the program, oops.
As there's no time restriction, can we have more averages please? 'say' 30
C
________________________________________________________
___
[00]Ready!
AT+C002
-130.39,-116.79,-218.00
-136.00,-120.79,-222.79
-134.39,-113.19,-215.19
-136.39,-116.79,-220.79
-131.19,-114.39,-215.19
-133.19,-116.00,-214.39
-132.39,-116.00,-220.00
-130.39,-115.59,-213.59
-134.19,-115.00,-219.39
-130.39,-118.00,-217.59
-131.50,-112.50,-221.69
-129.39,-114.59,-219.59
-135.19,-111.59,-220.00
-133.19,-120.19,-224.19
-131.29,-114.29,-215.69
-133.39,-116.00,-214.00
-136.00,-117.39,-215.59
-133.50,-120.09,-212.50
-135.39,-108.39,-222.19
-135.29,-118.29,-215.50
-133.59,-114.79,-216.19
-130.69,-123.29,-220.89
-129.89,-112.09,-217.29
-127.50,-118.69,-221.09
-136.39,-116.59,-221.39
-128.19,-113.39,-220.79
-131.79,-109.59,-219.59

_____________________________________________________

You can take as many averages as you wish.
Remember to divide by the number of loops

H

camerart said:

Hi J,
Is this better?:
Search for WRONG in the program, oops.
As there's no time restriction, can we have more averages please? 'say' 30
C
________________________________________________________
___
[00]Ready!
AT+C002
-130.39,-116.79,-218.00
-136.00,-120.79,-222.79
-134.39,-113.19,-215.19
-136.39,-116.79,-220.79
-131.19,-114.39,-215.19
-133.19,-116.00,-214.39
-132.39,-116.00,-220.00
-130.39,-115.59,-213.59
-134.19,-115.00,-219.39
-130.39,-118.00,-217.59
-131.50,-112.50,-221.69
-129.39,-114.59,-219.59
-135.19,-111.59,-220.00
-133.19,-120.19,-224.19
-131.29,-114.29,-215.69
-133.39,-116.00,-214.00
-136.00,-117.39,-215.59
-133.50,-120.09,-212.50
-135.39,-108.39,-222.19
-135.29,-118.29,-215.50
-133.59,-114.79,-216.19
-130.69,-123.29,-220.89
-129.89,-112.09,-217.29
-127.50,-118.69,-221.09
-136.39,-116.59,-221.39
-128.19,-113.39,-220.79
-131.79,-109.59,-219.59

_____________________________________________________

Click to expand...

Hi J,
A much better average now, thanks.
C.
_____________________________________________
-135.79,-126.07,-221.50
-136.50,-124.60,-221.96
-136.52,-125.46,-224.34
-135.95,-126.37,-224.50
-137.25,-124.75,-223.12
-136.39,-125.09,-222.01
-136.48,-125.32,-223.04
-135.84,-124.28,-223.08
-136.63,-125.41,-223.33
-135.75,-126.08,-222.06
-135.76,-125.46,-222.00
-137.25,-124.68,-222.36
-136.33,-126.03,-221.61
-135.64,-127.18,-221.82
-137.23,-125.85,-222.75
-135.98,-126.34,-222.06
-137.10,-123.78,-222.56
-137.16,-125.52,-222.98
-136.19,-124.43,-223.11
-138.16,-123.66,-222.02
-136.10,-124.16,-222.82
-137.27,-125.79,-220.91

Hi J and P,
Here's the final cut:

I've moved the zeros back out of the LOOP, so it doesn't update, and upped the number of averages.

p, If you would like to try your method, I'll test it for you, or save your energy for the main thread.
Thanks, C.
------------------------------------------------------------------------------
-140.50,-123.02,-216.60
-140.37,-122.64,-216.95
-140.76,-122.94,-217.01
-141.19,-122.30,-217.70
-140.90,-122.61,-217.29
-141.17,-122.36,-217.62
-141.00,-124.02,-216.25
-141.87,-122.64,-217.56
-141.02,-122.17,-217.61
-141.40,-123.19,-217.44
-141.58,-122.78,-217.56
-141.26,-123.31,-217.63
-141.05,-123.46,-217.82
-140.96,-122.88,-218.26
-140.61,-123.18,-216.83
-139.57,-121.56,-217.15
-140.29,-122.75,-216.74
-140.39,-122.49,-216.98
-140.82,-123.55,-217.59
-141.53,-123.83,-216.43
-140.98,-122.96,-217.11
-140.56,-124.69,-218.03
-140.67,-123.51,-217.26
-140.93,-123.35,-217.18
-141.17,-123.50,-217.86
-140.26,-123.48,-216.83
-140.56,-123.75,-216.55
-140.86,-122.88,-215.71
-141.13,-122.68,-216.90
-139.97,-123.48,-217.95
-141.16,-123.75,-217.19
-140.42,-123.77,-216.31
-141.48,-122.99,-216.96
-140.41,-123.47,-217.38
-140.53,-123.63,-217.34
-139.43,-123.52,-216.49
-141.70,-123.44,-217.44
-140.17,-123.54,-216.00
-140.60,-123.24,-217.86
-140.96,-123.53,-216.89
-140.85,-122.42,-217.41
-140.22,-122.23,-217.23
-139.90,-123.80,-217.23
-140.02,-122.30,-217.28
-140.31,-123.46,-217.04
-140.47,-123.21,-217.17
-140.56,-123.70,-216.86
-139.73,-123.95,-217.64

Hi,
With both BASE and REMOTE compasses BIAS calibrated, I started to test them.

Up to now I had thought that North on these AK8963C modules was Y as that's the first step of the calibration, but on closer inspection, I now think North may be X. Is this correct?
If so then for normal use, how should the 3x planes on the COMP be orientated?
C.

Z up, then point X to North, if X is large and Y much smaller, then X is North.

jjw said:

Z up, then point X to North, if X is large and Y much smaller, then X is North.

Click to expand...

Hi J,
I tried this, but the results were confusing. Are you sure that is the best method, I know it seem logical.

I almost recall that the sensors, are at angles not quite as it would be imagined?
C

camerart said:

Hi J,
I tried this, but the results were confusing. Are you sure that is the best method, I know it seem logical.

I almost recall that the sensors, are at angles not quite as it would be imagined?
C

Click to expand...

What the results were?

I was going to try to help here but you seem to have it sorted.

Mike.

camerart said:

Hi J,
I tried this, but the results were confusing. Are you sure that is the best method, I know it seem logical.

I almost recall that the sensors, are at angles not quite as it would be imagined?
C

Click to expand...

The coordinates relative to the chip are on the last page of the D/S.

I think that the logical way is that Y is North, but it doesn't matter, when the angles can be calculated even if X is North.

jjw said:

I think that the logical way is that Y is North, but it doesn't matter, when the angles can be calculated even if X is North.

Click to expand...

Hi J,
I saw the XYZ orientation on the D/S, but I think North is a calculation between the X and Y orientations, in the form of sine waves. My first thougt till I find previous examples, I have is that N is 1/2 way between X and Y.
Still looking.
C

jjw said:

I think that the logical way is that Y is North, but it doesn't matter, when the angles can be calculated even if X is North.

Click to expand...

Hi J,
Here's a link to the PDF, I've found. A bit heavy reading, but I think it may exp[lain better.
C.