PIC plus-5110 LCD-GPS-BMP280-HMC5983

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The sum and average should be singles.
The index is not necessarily 0, when the loadbfr is filled first time.
 
Hi C,
After you have compiled the code, use the Show Ram Usage, post image of what is shows.
E
 
In the readings, is 61 the last two numbers or the whole value ??
 
jjw said:
In the readings, is 61 the last two numbers or the whole value ??
Click to expand...
Hi J,
102952 to 102961.
I've tried changing the 'control bits' since it started to work a while back, and things haven't really changed much, this is why E, has written an 'average CALC' to get round it.
C.
 
ericgibbs said:
Hi C,
After you have compiled the code, use the Show Ram Usage, post image of what is shows.
E
Click to expand...
Hi E,
I looked for 'ram usage' and couldn't find it, then after investigation, I found my version of Oshonsoft it too old, so must update it.
I was surprised that an 'average calc' was needed, and as mentioned, wondered if it could the the 'burst READ' causing the problem, it turns out it was incorrect programming, but thanks for your CALC, and sorry to have wasted your time. See next post.
C.
 
Last edited:
jjw said:
You have SPIsend 0x7A, should be SPIsend 0x75
Click to expand...
Hi J,
Well spotted! Everything's changed.
I now get up to 25x the same READing before the decimal point, only changing slowly.
Here the latest: 102608.XX to 102610.XX with time.
Average Downstairs: 102627
Upstairs : 102583 -
=44
So 2-3 for every step.

E, I tried it with and without the AVERAGE CALC and it was the same.

It takes a few seconds to settle between changes, but I can fiddle with the 'control settings' later.

The TEMP is approx 0.25° high

Here is the program:

Thanks to all,
C.
 

Attachments

  • 18LF4520 PCB TEMP PRES CALC 050218 1500.bas
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Ram usage is in Basic / options menu.
 
Hi,
I notice that when taking measurements up/downstairs, the actual background air pressure is changing, also draughts make a difference.
Today I took measurements, and allowed them to stabilise, which with the last program settings, takes approx 1/2 minute. Once I tried up then down the difference is more like 35.xx less upstairs. The TEMP changed 1°.
Does this make my stairs the correct height?
C.
 
Last edited:
Morning C,
If this is for the remote R/C plane, I don't think you will get the performance you are expecting for the Altitude data.
E
 
The long time to stabilize, depends on standby setting in config register bits 7, 6 ,5 and long delay between measurements + the oversampling settings.
I think you have now 500ms standby setting + delay in the program.
 
jjw said:
The long time to stabilize, depends on standby setting in config register bits 7, 6 ,5 and long delay between measurements + the oversampling settings.
I think you have now 500ms standby setting + delay in the program.
Click to expand...
Hi J,
I tried 125ms, but it was the similar.
I think I have to change the LOOP time, as I have delays while there is a LED flash.
C
 
Hi,
I get artifacts on the 5110, how do I get rid of them please?
I've tried 'call clear' but this flickers the screen.
C
 

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  • 5110.jpg
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