New Book - Propeller Education Kit Labs: Fundamentals

[Andy Lindsay (Parallax)]

Hi Folks,

Thanks to all of you who submitted suggestions and requests for the individually posted Propeller Education (PE) Kit Labs.· We have now compiled them into a book that will be released as a printed text early next year.· The book includes updated versions of all the labs along with front matter and some introductions.· Here are links to the full .pdf text and zipped source code:

Propeller Education Kit Labs - Fundamentals
···· Full Text (.pdf)···· Source Code (.zip)

Please send feedback/suggestions to editor@parallax.com.· You·can also contact me directly·using·the PM or email buttons to the left of this post.

Have a great New Year everyone!

Regards, Andy

P.S. There are some references to a couple of web PE Kit applications that have not been posted yet in the book.· They will be out soon, definitely before the printed text is released.

• Oscilloscope and spectrum analysis of audio input added to the online ViewPort PE Kit Lab
• Updated following robot that uses the PID object

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Andy Lindsay

Education Department
Parallax, Inc.

Post Edited (Andy Lindsay (Parallax)) : 12/26/2008 11:14:22 PM GMT

[daniel ding]

hi Andy, I got a trouble in using PEkit. the detail is troubleshooting entry(9) on page 43. after changing code to pll8x LED flash,but changing back to pll16x it dosen't work. why?

[Rayman]

Andy,

Things like this is why I love Parallax! Even though I was trained as an EE, I had no idea how to work with microcontrollers at first, and very nice examples like these you' ve provided are defininetly the key to getting started. I think with normal places, you'd have to buy the book to get the code, and I'm very grateful to you and Parallax for providing it for free here.
I think it will get many more people into this world...

Ray

Ok, I was up late that thought this was a new post!
Sorry Daniel, I hope somebody gets to your question

[Rayman]

Daniel, Sorry if my late night love note distracted from your question to this old thread...

Can you please post the code you're having trouble with?

I tried looking on p.43, but don't see the code you're referring to...

[daniel ding]

Rayman，thanks for your kindness though I have already figure it out。

Can you tell me why not set parameters “pwm” and “DIR” to 6 and 7 directly but set as belows. thanks!
“BRK = 5
PWM = BRK + 1
DIR = PWM + 2”

[daniel ding]

moreover， Raman， Can you tell or show me how to display the system time on lcd 16X2. thanks a lot!

[Sariel]

Daniel,

Have you gotten the LCD to display characters yet? have you Gotten an RTC? Try looking into this object. Even though it is designed for a 4x20, it works quite well for these displays:

http://obex.parallax.com/objects/704/

and look into Kye's RTC object here:

http://obex.parallax.com/objects/420/

Take them one step at a time. I have integrated both of these in a few projects, and after some tinkering, you should be able to mesh them together to get what you are looking for.

[Shawn Lowe]

I get an error 404 when I try to open the text

[Crazyrabbit]

Having trouble downloading new book. Get cannot find page error. Oh well I am patient.

[HShanko]

Andy,

When I try to download the Propeller [B]]Education Kit Labs - Fundamentals[/B .pdf file I get a "The page cannot be found" error. I'm on a iMac; but that shouldn't make a difference. Has anyone else with a iMac been able to download

[daniel ding]

Sariel，
Thanks a lot, I have already downloaded your object. After while I will study it.

I really appreciate your kindness and help.

Thanks from a students of China

[daniel ding]

Hi everyone who can tell me why the “potline” has the same pin with “chipsel” in the following codes. The codes come from Utilities.spin.
high =1
low =0
PotLine =19
PotLine2 =20
repval =2
repval2 =2
BitsRead =12
BitsRead2=12
BitsRead3 =12
BitsRead4=12
chipSel = 19
chipClk = chipSel+1
chipDout = chipSel+2
chipDin = chipSel+3
chipSel2 = 23
chipClk2 = chipSel2+1
chipDout2 = chipSel2+2
chipDin2 = chipSel2+3

[Sariel]

Not sure, we would need to see the rest of the code. But, I suggest starting a new thread. We are really starting to hijack this one.

[StefanL38]

Hi Andy,

the link in the first posting is wrong

http://www.parallax.com/Portals/0/Do...nBook-v1.1.pdf

you are already on version 1.1
keep the documents coming
best regards

Stefan

[HShanko]

Thanks, Stefan

Finally can download the PE labs book. Wow, over 200 pages. Lot of effort to get all that in place. Thank you Parallax.

[Gwolfe]

Question about square wave program from exercises at end of chapter 5. Calling SquareWave with tHigh = 2717 and tCycle much larger than tHigh makes an LED glow dimly. Calling it with tHigh = 2716 makes the LED glow constantly at full on. This happens regardless of the exact value of tCycle or the clock frequency chosen. Why?

[kuroneko]

Calling it with tHigh = 2716 makes the LED glow constantly at full on. This happens regardless of the exact value of tCycle or the clock frequency chosen. Why?

The version coming with PropTool 1.3 takes a smaller value (~2k4) to lock up but assuming your version doesn't differ significantly, it's down to waitcnt missing its (initial) target. IOW the cycle count between sampling cnt and then waiting for t_H exceeds t_High. HTH

[Gwolfe]

Makes sense. Thanks.

[Gwolfe]

Another basic question. Suppose method1 is contained in object1 and object1's start method launches method1 into cog1. Method1 appears to have direct access to object1's global variables (i.e. without needing to pass addresses as would be necessary to transfer information to or from another object). Do object 1's global variables still reside in main RAM and not cog1's RAM? What happens if the start method launches method1 into cog1 and method2 into cog2? Do both methods now have access to object1's global variables? How are conflicts resolved?

I couldn't find an answer to this one in the propeller manual or elsewhere. Would also like to know where else to look in the future for similar questions.

[kuroneko]

Do object 1's global variables still reside in main RAM and not cog1's RAM? What happens if the start method launches method1 into cog1 and method2 into cog2? Do both methods now have access to object1's global variables? How are conflicts resolved?

From context you seem to use SPIN. IOW global variables stay in hub RAM. Which also means both cogs have access. As for conflicts, built-in type access (byte/word/long) is atomic. Anything more exotic is your responsibility.