Cow PI

[Silver Dollar]

What language do you use on the PicAxe? Just flow charts? If so you could use the Graphical Great Cow Basic.

http://gcbasic.sourceforge.net/aboutgcgb.html

Basic is well pretty basic. It is supposed to be easy to read as it is close to the way you would say what you
want to do. It takes a little study to learn the syntax.

This is about as simple as it gets;
PulseOut TXFet, 50 us
Wait 20 us
PulseOut First, 20 us
Wait 20 us
PulseOut Second, 20 us
WAIT 250 us

All this is to create pulses for a PI detector. You change the rep rate to change the Frequency it is
a bit different than a VLF which uses a sine wave that you might want a different frequency on..

[geoscash1]

Well to be honest with you, I believe it is Basic that is used, I guess I just don't recognize some of what you have written because I haven't seen or done it that way. What you just posted I can understand.... You can check picaxe out here - http://www.picaxe.com/What-Is-PICAXE

Here is a short example of one of my cam codes, just the first part defining pins then some symbols & labels with base code I use for different cams.

'picaxe 08m - sony series basic cam control with walktest 2007
low 0
low 1
low 2
low 4
symbol counter=b1
symbol pir=pin3
symbol led=pin4
symbol campower=pin1
symbol shutter=pin2
let counter=255


warm_up:

pause 2500 'wait 2.5 seconds
high 4 'light led to know warmup has started
pause 1500 'leave led on for 1.5 seconds
low 4 'turn off led
high 1 'turn cam on
pause 1500 'hold power button down for 1.5 seconds
low 1 'release power button
pause 10000 'pause with cam on for 10 seconds
high 1 'turn cam off
pause 1000 'pause for 1 second to make sure cam turns off
low 1 'release power button
pause 2000 'pause for 2 seconds
high 4 'turn on led, warm up finished
pause 1000 'pause 1 second
low 4 'turn off led
pause 5000 'pause before entering walktest
goto walk_test 'enter walktest


walk_test:

w0=300 '100ms=300x100=30,000ms=30s...30 second walktest
do while w0>0 'walktest continues until timed out
if pin3=1 then 'when motion sensed then
high 4 'turn on led to show motion sensed
pause 1000 'pause for 1 second
low 4 'turn off led
pause 200 'wait 2 tenths
w0=300 'restart timer from begining if motion sensed

super simple stuff although it took me quite awhile to understand it, still am learning it though..You can also use the flow chart if you choose...Gosh what is the deal with this editor, cant type anything in here, I have to do my post on note pad then copy and paste it in here...pain in the arse....lol

[6666]

Any progress SD ?

[Silver Dollar]

While waiting for parts to come in I had a "chance" to get a chance board so jumped on that.
Then got hung up on programming that so jumped back on my super TGSL. Rn into problems
with that so tore it down and rebuilt it to stock form. Also found a SMT Bandito board and bought
that and had a try at relaying it out to make a Dual Bandito.

So the Cow PI has been on the back burner. I'll get back to it sometime just too many projects
right now...

[6666]

Ok SD, that happens to us all too many projects, will keep watching , cheers.

[6666]

Any updates SD ?

[mohandes]

I wanted to make a PI detector for the beach (though my modified TGSL can be used there now);

http://www.geotech1.com/forums/showt...-Quad-Sampling

I have a Hammerhead I board half built up so will using that for initial development. I searched around checking out various PIC's and software's to use on this project and came up with this;

I don't know C and it will take a long time to learn so assembler or Basic would be better. I found the Great Cow Basic compiler;

http://gcbasic.sourceforge.net/index.html

It will allow faster development and outputs assembler with Basic commands and comments in it so you could then optimize the assembly or work totally in assembler once the framework is written.

Thus the name "Cow PI".

I will use the 18F4550 as it's newer and has lots of features. Carl had already designed a board. See the attachment for Carl's schematic and and ExpressSCH schematic I drew with some mods. We won't be using USB yet as the software is difficult unless your using C.

No display on this one either as it adds complexity and cost and uses more battery.

I envision a couple of push buttons and some LED's to set it up. I need to figure out what a typical PI timing might be for shallow/deep and small large targets.

One mode might be a button and a pot. Press the button and adjust the pot and the PIC will widen the sample pulses and move them apart to set the working pulse pattern.

Another might continuously vary the pulses from shallow to deep then stop when a target is found.

Later we might add wide and narrow pulses like the big guys use or other fun things.

Most of these projects die quickly or progress to high end hardware and go commercial.
I hope to keep this one as a hobby detector and just use it for my own personal use.

I will be using Microchip's MPLAB IDE and the Great Cow Basic. I have a IDC3 programmer and can program the PIC in circuit (most PIC programmers can do the same). The 40 pin 18F4550 might be easier to work with but these schematics are based on the 44 pin TQFP as I obtained a board already designed for this. The programming pins attach differently on the 40 pin (see 40 pin version). You can use the same pins on the 44 pin but the alternate ones free up some pins for circuit use...

I could use some input on typical timing for a beach PI for small/shallow and large/deep targets and any other suggestions for capabilities or implementation help.

I'll be back in my lab in a few days to start working on the hardware.

hi
i see this project now.can you say me which version is ok .and work complete?
and if possible say me which one i make.(have many version )
regards

[6666]

Silver dollar is your cow pi still on back burner ?
I tried to experiment with Picaxe but they are way too slow.

[Silver Dollar]

Yes I have all my stuff packed up as we are moving to sunny Florida (The land of infinite treasure!)
so will be working in earnest on some different PI's once we are there. It might not be until the end
of April...

[6666]

OK thanks SD

[6666]

Hi Silver Dollar
I have tried your GC graphical basic program , but I get a problem when I try to compile.
I down loaded the main program then the update
When trying the examples or just making a new program AND selecting a chip in the hardware menu

when hitting the compile button I get a error message box come up saying no chip selected
according to the help file when this error message pops up another box should open
to let you select a chip, but that does not happen
ANY clues would be helpfull thanks.

[6666]

This is not funny, I just downloaded their new great cow HOT RELEASE and unzipped it
and ran the IDE, after it opened, AVG my antivirus software immediately said it was a threat so hit the delete the threat button.

[6666]

Been having a bit more of a play with GCGB, been able to get some PI GB codes to run.

[6666]

There is a new release of GCB available has some new features.

[6666]

There is a new command ReadAD12 for pics with 12bit ADC

The PICs that support Differential and 12-bit A/D are listed below. Dated December 2015.

16f1782 16lf1782
16f1783 16lf1783
16f1784 16lf1784
16f1786 16lf1786
16f1787 16lf1787
16f1788 16lf1788
16f1789 16lf1789


18f65k22
18f66k22
18f67k22
18f85k22
18f86k22
18f86k22


18f25k80 18lf25k80
18f26k80 18lf26k80
18f45k80 18lf45k80
18f46k80 18lf46k80
18f65k80 18lf65k80
18f66k80 18lf66k80


18f65k90
18f66k90
18f67k90
18f85k90
18f86k90
18f87k22

18f87k90