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snarf
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Joined: 16/03/2020
Location: Australia
Posts: 4

Posted: 08:06pm 30 Apr 2020

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I am making a project with the Micromite Backpack V2 with the latest version of MM basic.

This is my first programming project and am still coming to grips with MMBasic.

The screen displays various values but has a cumulative graph for upto 10 hours. At times I need to switch to another screen to make and save PID value adjustments, then switch back to the main screen. If I can save a screenshot before switching to the adjustment screen, I could load it again when I switch back so not loosing the historical graph.

Haven't come to grips with arrays or saving data to eeproms, and was wondering if the was a simple answer? I see a SD card holder under the screen.

Ant help would be appreciated.

Thanks, snarf

palcal

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Joined: 12/10/2011
Location: Australia
Posts: 1993

Posted: 08:44pm 30 Apr 2020

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I think you would need MM Plus. Download the MM Plus manual. Look at Pg 41. You can also save Bitmap to SD card.

I sent you a PM look in your inbox.
Edited 2020-05-01 07:56 by palcal

"It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all"

lizby
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Joined: 17/05/2016
Location: United States
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Posted: 10:47pm 30 Apr 2020

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snarf said wondering if there was a simple answer?

I think on your present equipment there's no hope for saving a screen shot and restoring it. Probably best to figure out how to save the data needed to re-create the screen.

PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on fruitoftheshed

Volhout
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Joined: 05/03/2018
Location: Netherlands
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Posted: 11:49am 01 May 2020

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Hi snarf,

The backpack V2 uses a 28pin MX170 chip running MMbasic2.
In MMbasic2 there is no simple way to make use of the SD card. Matherp wrote a Cfunction that can be used to write data to the SD card but there are limitations.

AFAIK there is no way to take a screenshot in MMbasic2.

If you draw a graph on the screen you do that from numerical data in your PID controller. This numeric data can be extracted through the serial port. The same connection you use to program the chip.

Example: create an array of the last feedback values (feedback represents the actual output of the PID algorithm).
As part of your program you could (on key press) simply print all the 100 values (to the serial port).

dim feedback(100)

......

if inkey$="d" then
for i=1 to 100
print feedback(i)
next i
end if

Your PC could log the values in a "values.csv" file that can be read in Excel.
Excel can make you the nice graphs.

You can make your file as large as memory allows, capturing as much of the process as required.

Volhout

PicomiteVGA PETSCII ROBOTS

matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 10310

Posted: 06:21pm 01 May 2020

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Get to grips with arrays, they aren't difficult

Lets assume you are writing to the array with time on the X axis. As you are writing data to the display save the data to an array in an element representing the x-coordinate with a value equal to the Y coordinate. Then after you have done your pidding just write each element back to the display.

dim x%(319)
......
'logging here
x%(column_number)= row_number

sub restore
for i=0 to 319
pixel i,x%(i)
next i
end sub

palcal

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Joined: 12/10/2011
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Posts: 1993

Posted: 10:29pm 01 May 2020

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Matherp wrote

Quote Then after you have done your pidding

Haven't heard of "pidding" before, what does it mean.

"It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all"

JohnS
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Joined: 18/11/2011
Location: United Kingdom
Posts: 4044

Posted: 10:37pm 01 May 2020

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It's about "PID value adjustments".

John

TassyJim

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Joined: 07/08/2011
Location: Australia
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Posted: 10:38pm 01 May 2020

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palcal said Matherp wrote
� � � � � �

Quote Then after you have done your pidding

Haven't heard of "pidding" before, what does it mean.

Reread the first post

He wants to use another screen to change PID values, hence PIDing

Edit:
John beat me - too slow typing!
Edited 2020-05-02 08:39 by TassyJim

VK7JH
MMedit

palcal

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Joined: 12/10/2011
Location: Australia
Posts: 1993

Posted: 11:02pm 01 May 2020

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OK got it. Maybe I would have understood PIDing.
Edited 2020-05-02 09:04 by palcal

"It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all"

TassyJim

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Posted: 11:06pm 01 May 2020

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palcal said OK got it. Maybe I would have understood PIDing.

Cold and wet here today so PIDdling is more like it.

VK7JH
MMedit

palcal

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Joined: 12/10/2011
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Posted: 11:52pm 01 May 2020

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Sunny and 30 degrees here.

"It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all"

Phil23
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Joined: 27/03/2016
Location: Australia
Posts: 1667

Posted: 12:59am 02 May 2020

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palcal said

Haven't heard of "pidding" before, what does it mean.

I guess it is like the Plusing some kids did in Primary School.

Some also said they got the wrong answer even they Plused the numbers...

palcal

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Posts: 1993

Posted: 01:14am 02 May 2020

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Yeh, I looked it up in the dictionary then Mr Google didn't know so thought I would ask.

"It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all"

snarf
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Joined: 16/03/2020
Location: Australia
Posts: 4

Posted: 06:44am 02 May 2020

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Hey Guys,

Thanks for all of your advice and confirming that there is no "easy way".

Matherp, I should take the next step, and make sense of arrays. I see your suggestion as a good solution.

Once the PID values are OK, I shouldn't need to access the adjustment screen again (I hope), hence was hoping for a simple screen shot/restore answer.

Again, thanks, and hope you are all managing & keeping well.

Social distancing being relaxed a little here today in Qld, Aust. Got to hug the grandchildren.

Rod

Cyber

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Joined: 13/01/2019
Location: Ukraine
Posts: 161

Posted: 02:26pm 04 May 2020

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Volhout said The backpack V2 uses a 28pin MX170 chip running MMbasic2.
In MMbasic2 there is no simple way to make use of the SD card. Matherp wrote a Cfunction that can be used to write data to the SD card but there are limitations.

Where can I find this function? And some usage info.
I understand about limitations, but it might satisfy my needs.

JohnS
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Joined: 18/11/2011
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Posted: 02:45pm 04 May 2020

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Maybe https://www.thebackshed.com/forum/ViewTopic.php?FID=16&TID=12013

Into a web search I put
matherp thebackshed cfunction sd read write

There were more results in case that's not the one.

John

Cyber

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Posted: 03:10pm 04 May 2020

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JohnS said Maybe https://www.thebackshed.com/forum/ViewTopic.php?FID=16&TID=12013

Looks like it. Thanx, John!

JohnS
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Joined: 18/11/2011
Location: United Kingdom
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Posted: 03:43pm 04 May 2020

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Hope it works :)

John

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