[chbot] Simple robot programming

[timothy manning]

Hi Jimmy

The problem with Picaxes is it's very limited and not expandable.
It is also very expensive. If you want a BASIC lanuguage then use an
AVR and run BASCOM on it.
This way you can upgrade to C with out changing your controller board
and it's very cheap compared to a Picaxe.

-Timothy



On Tue, Jun 30, 2009 at 5:43 PM, jimmy allen<jimmy1248 at gmail.com> wrote:
> have any of you use picaxe system
> it is good for beginners as you can write up programs using flow
> charting or the basic language
> you can write up fairly complex projects
>
>
> On 6/30/09, Morris <skibear at gmail.com> wrote:
>> I love ladder logic and had been thinking about it!
>>
>> Ladder logic is functional programming (which will make Paul Davey
>> happy!).
>>
>> Ladder logic has an obvious DHTML web interface for it (that said I am
>> not volunteering to do that because I do Ajax web development for my
>> job :) but given how common it is I would hope there is something free
>> out there already. I personally am attempting to avoid requiring
>> anything installed on a PC, that way web-phones can be used for
>> development and for remote control, and also so there is no dependency
>> on having either Windows or Linux installed.
>>
>> Charles, I am very keen to hear what you find out - especially if it is
>> web based open-source (Python would be perfect, but PHP, Ruby, Lua, Perl
>> or Linux CGI apps can all be hosted on the wifi router web server -
>> probably even DOS apps in DOSBox).
>>
>> Simon - is that a volunteer I hear! ;)
>>
>> Cheers
>>
>> Morris.
>>
>> On Tue, 2009-06-30 at 10:22 +1200, Simon Knopp wrote:
>>
>>> That project looks interesting. I agree, ladder logic is a good way to
>>> get started with programming simple robots.
>>>
>>> What would really make a tool such as that powerful would be the
>>> ability to create functional blocks, either of ladder logic or code. A
>>> block of ladder logic would allow higher level commands like in
>>> Mindstorms---"turn 90º left" or "move forward for 1 second". A block
>>> of code (much like PLCs' structured text) could allow one to write a
>>> function in C (for example) and have it represented as a block within
>>> the ladder logic environment. These blocks could be created by anyone
>>> who knows the language and distributed easily to those that don't.
>>>
>>> I know I'm sort of just describing what PLCs can already do, but to my
>>> (relatively uninformed :-) mind it wouldn't be too difficult a feature
>>> to implement into a system like that you linked to and would make more
>>> powerful programming with ladder logic feasible and accessible to more
>>> people.
>>>
>>> Just my two cents worth.
>>> Simon.
>>>
>>>
>>> On 29/06/2009, at 9:55 PM, Charles Manning wrote:
>>>
>>> > Morris and I had a very interesting conversation about simplifying
>>> > robot programming.
>>> >
>>> > Many people are drawn to Mindstorms-like drag and drop programming.
>>> > This is indeed a simple way to do very simple programming (but is
>>> > hopeless for anything of reasonable complexity). These tools are also
>>> > no open source or free.
>>> >
>>> > Fortuitously I got into a discussion with Timothy about PLC "ladder
>>> > logic" programming. This could be a simple way to do very simple
>>> > programs. There are a few very interesting open source ladder logic
>>> > projects out there that compile a ladder and generate a "byte code"
>>> > which runs on a tiny interpreter. These can be simple enough to run on
>>> > a small AVR, moderate PIC, Linux box etc. Anything that can eat C.
>>> >
>>> > Ladder logic is a graphical representation of an electrical circuit
>>> > that operates on inputs and outputs
>>> > eg.
>>> >  |     IN1   IN2  OUT1  |
>>> > +-----[ ]---[ ]---( )------+
>>> > |                                |
>>> >
>>> > If IN1 is on and IN2 is on then turn on output 1.
>>> >
>>> > Better descriptions in http://en.wikipedia.org/wiki/Ladder_logic
>>> >
>>> > A ladder logic tool I'm going to look at more is at
>>> > http://www.cq.cx/ladder.pl
>>> >
>>> > --Charles
>>> >
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