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Forum Index : Electronics : beginning picaxe for old dogs
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| VK4AYQ Guru  Joined: 02/12/2009 Location: AustraliaPosts: 2539 |
Me Again I see when Itry to leave a bigger space the forum format closes it up anyway....Bat1....Bat one refers to the battery see if that works Bob Foolin Around |
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oztules Guru Joined: 26/07/2007 Location: AustraliaPosts: 1686 |
Gizmo, You may want to keep that win95 copy. It is my understanding that 95 is Microsofts latest stable platform.... or was that Dos 6..... 
I liked 95, 50m loaded, and worked. I notice that Microsoft then released a retrograde version called Vista. They should have stayed with 95 and just added drivers perhaps.... couldn't be worse...... on todays machines it would be blindingly fast, but they claim that about Windows7 on their adds  .... they know how to set a low bar.
..............oztules  Village idiot...or... just another hack out of his depth |
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Downwind Guru Joined: 09/09/2009 Location: AustraliaPosts: 2333 |
Hi Janne, Thanks for the correction. It would be nice to have your involvement to help here. I am not an expert on the picaxe and would like to give others the oppertunity to have some fun with these as many of us have had. Please feel free to add a section to the Basic commands on any topic if you would like. Every bit will help. The more 4M involvement the better. Pete. Sometimes it just works |
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| oztules Guru Joined: 26/07/2007 Location: AustraliaPosts: 1686 |
Bob...... re-read this from Downwind: [quote] There can not be spaces in a word used as a symbol like , time out , so for this we use an underscore to join the 2 words like , time_out . [/quote] So get into the habit....No gaps.... but could be Batt_1 ............oztules Village idiot...or... just another hack out of his depth |
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| Dinges Senior Member  Joined: 04/01/2008 Location: AlbaniaPosts: 510 |
For those that grew up in the days of DOS (or worse... who set their first steps into PC land using CP/M  ), using an underscore in filenames still comes naturally.
Old habits die hard.... Peter. (<-- reading the PICaxe stuff with interst in the background) |
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| Downwind Guru Joined: 09/09/2009 Location: AustraliaPosts: 2333 |
Hi Bob, Your glasses are on the way and in the mean time ...I...w_i _l_l ....t_r_y ... t_o....t_a_l_k...s_l_o_w_e_r...f_o_r...y_o_u. I do understand it is hard to get a mind around and even harder to try to put all this in a simple manner to explain it. Once you have a play and ask a few questions and understand the answer it will be easy. It is much easier writing your own little program as you know what the program should be doing to start with. It is just a matter of finding a way to write it into program. Trust me its not that hard. If i can do it anyone can. Pete. Sometimes it just works |
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| VK4AYQ Guru Joined: 02/12/2009 Location: AustraliaPosts: 2539 |
Hi ozztubes I meant in the explanitary text not the programing language Bob Foolin Around |
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| VK4AYQ Guru Joined: 02/12/2009 Location: AustraliaPosts: 2539 |
Hi Pete thanks for that, after I read it a dozen times it will sink in .....hopefully.....bat1....is the battery and I progress from there All the best Bob Foolin Around |
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vasi Guru Joined: 23/03/2007 Location: RomaniaPosts: 1697 |
Yes, is a Firefox problem (tried with IE) so, to anyone wanting to follow the tutorial, use something else. Vasi Hobbit name: Togo Toadfoot of Frogmorton Elvish name: Mablung Miriel Beyound Arduino Lang |
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5036 |
The forum has a markup tag we can use to help format text. The tag is {CODE}, but replace the { brackets with a [ bracket, and the } bracket with a ] bracket. So to display a bit of code, where we want to keep the formatting including spaces, I would use {CODE} for x=1 to 10 echo x next {/CODE} Now if I use the correct brackets, we get. for x=1 to 10 echo x next This tag was a bit buggy, but I think I've fixed it, let me know how it goes. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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| Gizmo Admin Group Joined: 05/06/2004 Location: AustraliaPosts: 5036 |
Its been mentioned before the forum tries to block users entering their own markup tags. It also throws random hidden characters into long words, like web site addresses. The forum does this as a security measure. The reason is simple, its blocking anyone adding script to the web page. Below is a sample of harmless script <script language=javascript> alert ('Hello') </script> Now you can see this code because the forum converted the special characters, like < & >, into harmless html codes that are displayed, and not treated as pure html code. If the forum didn't do that, you would have recieved a popup message "Hello" Same with long words, like web page addresses. The forum inserts spaces and other hidden characters to make the word safe, just in case it was a string of html characters built into a dangerous script. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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Tinker Guru Joined: 07/11/2007 Location: AustraliaPosts: 1904 |
Downwind, My old laptop runs Windows XP and I bought the USB to serial converter for it to upload track data from a GPS. It worked fine but have not used it for some years now. The correct driver to do the above is already installed. Re the odd embedded symbols, I'm running Firefox and it may have to do with that. I eventually guessed they represent some kind of quotation marks. Vasi's text shows exactly what I'm seeing. Klaus |
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| vasi Guru Joined: 23/03/2007 Location: RomaniaPosts: 1697 |
Weird, no problems anymore in Firefox under Linux and Vista!... I think Glenn did something
Vasi Hobbit name: Togo Toadfoot of Frogmorton Elvish name: Mablung Miriel Beyound Arduino Lang |
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| Downwind Guru Joined: 09/09/2009 Location: AustraliaPosts: 2333 |
Hi Vasi, He can be a trickie devil like that sometimes. It might have helped that i edited all the inverted commas out of the text to. Anyways good to hear the problem is fixed and a lesson learnt with using Winword to compile in. No " " allowed. Pete. Sometimes it just works |
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| Downwind Guru Joined: 09/09/2009 Location: AustraliaPosts: 2333 |
Waffle part 2. Please ignore any …either side…of text as it is just to introduce some space in the text as requested and has no code meanings. How a program works. The chip reads the program as you would a book. It starts at the top and reads line by line down the page. Each line takes about 2 milliseconds to execute. The program can be redirected to any point within the program, or at any stage up or down. Like reading the book you might be told to see page X, figure 3. The program needs a index point or reference point to go to as you did with …page X figure 3 in the book. The index points used in a program are called …Labels …and the label must be followed with a colon ( : ) The two main commands used to direct the program to a Label is… GOTO …and… GOSUB. Goto or gosub will direct the program directly to the nominated Label and jump everything in between. The difference between the 2 commands… Goto and Gosub… is … GOTO… will jump to the label given and carry on with the rest of the program from there. A …GOSUB …will return form the label to the next line below where it was sent from. For this reason at the end of the labels operation there must be a statement…RETURN … added for any… Gosub used. We will look at this in an example a little later, but first a few more explanations. It is common we need to test a condition of a pin or a value stored in a variable … ( b0, b1,b2……b13 ). For this we use a …. IF….THEN …statement. Example. IF pin3 = 1 THEN High led Endif [/code] Every… IF … THEN … must finish with a …ENDIF This is because if the condition is true the program will preform every line in between the… IF …and the… ENDIF …. In this case turn the led on. If the condition is false ( pin3 is low ) then the program will jump to the next line below the …ENDIF… and ignore everything in between. Using Pin Numbers. ( no not your bank card number) Each pin is dedicated a number by picaxe and can not be changed. To use a pin as an… Output …we simply just use the number after the command. Multiple pin numbers can be used in a single line but must have a comma between each number except the first digit. Example High 4,1,0,2 Using pins as …Inputs… we need to write this as …PIN3… or… PIN2….etc. Example If PIN2 = 0 '(low) Same as above is If pin2 = 0 ( low )… ( or ..if pin2 = 1 (high) ) Just another way of writing it. Now with some of this strung together in a program example. Main: If pin3 = 1 then '( 1 = high) High 1 Low 4 Gosub Beep Endif If pin3 = 0 then '(0 = low ) Low 1 High 4 Endif Goto main Beep: High 2 Pause 50 Low 2 Pause 50 High 2 Pause 50 Low 2 Pause 50 High 2 Pause 50 Low 2 Low 1 Return Goto main [/code] Whats this all means? Lets say we have a beeper connected to …pin 2…and a switch connected to … input 3… and every time the switch was pressed we wanted to turn the led connected to… pin 1… On… and hear …3 beeps… and then turn …pin 1 …led off. If the switch is not pressed then the led connected to …pin 4 …will be On The… Labels… in the example are …Main…and…Beep… If the …Goto Main …was not the line above the label…Beep… the program would carry on through all the way to the bottom and it would beep 3 times every time regardless if the switch was pressed or not. The …Goto Main… on the very last line is not entirely necessary as the …Return… should send it back to …Endif …below the …Gosub… But it is a good practice to include it in the event the program falls through to that point it is redirected back to the start and not off into lala land and would remain there till the power was switched off and back on again. Also known as a …HARD RESET. Enough for now. Pete. Edited by Pete to be correct as Oz had pointed out an error. Sometimes it just works |
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| oztules Guru Joined: 26/07/2007 Location: AustraliaPosts: 1686 |
Yikes, With the linux version.. axepad.. I downloaded and it seems to work. But, with the above program, it seems to stop at the first line and say syntax error. The only way around this is to use the fact that pin3 is a digital input and instead of: If pin3 = high then I have to use: If pin3 = 1 then and the same for the: If pin3 = low then I have to use If pin3 = 0 then The syntax check then checks out positive. If I wrote it as 1 instead of high I should get the same result.... but how come you can use high instead of me using high?? Is it something I am missing, or is the linux one behaving differently to the windows one?? Puzzled pest oztules Village idiot...or... just another hack out of his depth |
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| Downwind Guru Joined: 09/09/2009 Location: AustraliaPosts: 2333 |
Hi Oz, You clever old dog 
You have just won the booby prise of a half eaten chewy bone. Well picked up on my mistake. Yes Pin3 should only read IF pin 3 = 1 than........( or 0 ) I was tired when writing it and brain not in gear. Or should i say a intended error to see if you were paying attentison. 
One thing about the 4m it will be a big syntax checker. Good to see you have made the first step. Go to the Help section of axepad and have a look at some of the information and print off the diagram for the pin outs of the 08M for a quick reference guide. Pete. Ps. Take the "s" out of pest. Sometimes it just works |
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| Downwind Guru Joined: 09/09/2009 Location: AustraliaPosts: 2333 |
Here is the program for Gizmo's pump controller as used in the screen shots. If you download the file and open it with axepad or prog. editor, depending what version you have. It should read a little clearer and allow you to scrole through it for a closer look. It is not a good program to run in the simiulator as it will get stuck in the .... pump_on_to_long....routine. I will post both Glenns version and my rewrite of his program, they are the same just written 2 different ways so you can have a look at different approaches to the same outcome. 2010-01-02_165800_Gizmo's_pump_control.zip 2010-01-02_170609_Glenn's_pump_code.zip Pete. Sometimes it just works |
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| Downwind Guru Joined: 09/09/2009 Location: AustraliaPosts: 2333 |
Here is some simple LED programs i wrote with some kids some time back, that will show a few basic functions and you can load each into the chip for a look when you get a board. 2010-01-02_172301_SIMPLE_LED_PROGRAMS.zip Pete. Sometimes it just works |
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| VK4AYQ Guru Joined: 02/12/2009 Location: AustraliaPosts: 2539 |
Hi Pete Got crook on the weekend a and up in the HOZZ PIDDLE have to catch up. All the best Bob Foolin Around |
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