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by picandies
Tue Aug 07, 2018 3:57 pm
Forum: Compute Module
Topic: CM3 and i2c0
Replies: 11
Views: 1346

Re: CM3 and i2c0

Display? This has nothing to do with a display...

My board has chips hooked to sda0 & scl0 and sda1 & scl1
by picandies
Tue Aug 07, 2018 2:56 pm
Forum: Compute Module
Topic: CM3 and i2c0
Replies: 11
Views: 1346

CM3 and i2c0

Hello:

Using a compute module (cm3l) & stretch. My board has devices on both I2c busses. got bus 1 working easy, no problem, but having trouble with bus 0 (sda0 & scl0)...seems like its just giving error (as though not enabled/configured).

What is the latest to get it up & running?
by picandies
Wed Jun 20, 2018 10:22 pm
Forum: General discussion
Topic: recent serial i/o tutorial
Replies: 11
Views: 820

Re: recent serial i/o tutorial

My circuit board has various different chips hooked to MOSI & SCLK & then each chip has a chip select hooked to an general IO pin. (two of the chips are hooked to SPIO_CE1_N &SPIO_CE0_N, others to different IO's) I need to send various SPI bytes to each chip to control them. a) I will enable a chip ...
by picandies
Wed Jun 20, 2018 4:53 pm
Forum: General discussion
Topic: recent serial i/o tutorial
Replies: 11
Views: 820

Re: recent serial i/o tutorial

What library /command would you use to just send out the data bits, without automatically doing any chip select? I don't mean bit-bang the data--that would be quite slow. a) I will enable the chip select in my program b) Send the data out using the high speed spi (not bit bang)...what lib /command? ...
by picandies
Mon Jun 18, 2018 4:39 pm
Forum: General discussion
Topic: recent serial i/o tutorial
Replies: 11
Views: 820

Re: recent serial i/o tutorial

spidev is the hardware SPI, and uses fixed pins. It's very fast, but can only use those four particular pins Well, that would not quite make sense...what if you have 5 chips...you will need 5 select lines. Can the serial lines be shared (data out, data in , clk) & then you control the select lines?...
by picandies
Sun Jun 17, 2018 10:29 pm
Forum: General discussion
Topic: recent serial i/o tutorial
Replies: 11
Views: 820

Re: recent serial i/o tutorial

Thanks--I see now GPIO apparently doesn't support SPI, but GPIOzero does? However, I notice for GPIOzero: while GPIO8 is select for device 0 and GPIO7 is select for device 1). Well, I'm using completely different pins for my chip selects & also there are 6 of them (6 chips). Is that a problem? What ...
by picandies
Sun Jun 17, 2018 7:52 pm
Forum: General discussion
Topic: recent serial i/o tutorial
Replies: 11
Views: 820

recent serial i/o tutorial

Is there a recent tutorial, NOT from 2014, since so many changes for RPI3 & stretch. Need to hook up various SPI devices (not common chips), trying:
import RPi.GPIO as GPIO
etc
But can't seem to make any sense of why SPI not functioning...
Need some samples!
by picandies
Mon May 14, 2018 9:33 pm
Forum: General discussion
Topic: NOOBS ..not available??
Replies: 5
Views: 341

Re: NOOBS ..not available??

Never EVER heard of this PINN, maybe worth a try...my download finally finished so just moving ahead now.
by picandies
Mon May 14, 2018 9:11 pm
Forum: General discussion
Topic: NOOBS ..not available??
Replies: 5
Views: 341

Re: NOOBS ..not available??

An hour later is was up to a whopping 3% ...I cancelled the whole thing...retried a few minutes later and it started doing about 1% every 8 seconds (warp speed)
by picandies
Mon May 14, 2018 7:53 pm
Forum: General discussion
Topic: NOOBS ..not available??
Replies: 5
Views: 341

NOOBS ..not available??

something wrong with noobs??...won't download, says 0% after 10 minutes & also says greater than 12hrs!!!

2 computers working fine with 50meg internet connection. Same result
by picandies
Fri Apr 27, 2018 4:36 am
Forum: General discussion
Topic: Serial terminal apps for RPI
Replies: 4
Views: 3352

Re: Serial terminal apps for RPI

THANKS! Minicom is working "ok"...does what it needs to do, though makes me think I'm using some pre-windows device. I wasn't quite sure how to set it to show what I was typing...though the query replies came back...so my typing was making it's way out of the rpi. CUTECOM is similar to BRAY's---very...
by picandies
Thu Apr 26, 2018 7:37 pm
Forum: General discussion
Topic: Serial terminal apps for RPI
Replies: 4
Views: 3352

Serial terminal apps for RPI

I'm controlling some things from the rpi3 through the serial port (ascii)..that is working fine under python control. However I need to also to use a terminal on the RPI in some cases. On windows I use TERAterm or Brays terminal (preferred). I need to be able to see what is being typed (sent from rp...
by picandies
Tue Apr 24, 2018 5:26 am
Forum: General discussion
Topic: is calibri & Helvetica font usable?
Replies: 14
Views: 2242

Re: is calibri & Helvetica font usable?

As long as they are very close between the PC and rpi, should be ok....found out when moving a gui from the pc to rpi, the text mysteriously no longer fit into its assigned fields & textboxes, so it required a lot of unexpected editing on the rpi. At least now am aware of the issue, but would like t...
by picandies
Mon Apr 23, 2018 5:19 pm
Forum: General discussion
Topic: is calibri & Helvetica font usable?
Replies: 14
Views: 2242

Re: is calibri & Helvetica font usable?

the URW++ fonts for gs are a bit old. The TeX Gyre fonts (in the fonts-texgyre package)
Is there any trickery to installing these fonts on the rpi? Haven't had the need up till now
Once installed, is there anything that needs set/changed so that the rpi will actually use them in all apps?
by picandies
Mon Apr 23, 2018 1:08 am
Forum: General discussion
Topic: is calibri & Helvetica font usable?
Replies: 14
Views: 2242

Re: is calibri & Helvetica font usable?

Interesting....for a while now I used this in Tkinter: myFontC = tkFont.Font(family = 'Helvetica', size = 20, weight = 'bold') It displays very nicely....but then on the PC looks rather different......it appears that on the rpi it is not actually using Helvetica (I wouldn't know if it was or not unt...
by picandies
Sun Apr 22, 2018 9:56 pm
Forum: General discussion
Topic: is calibri & Helvetica font usable?
Replies: 14
Views: 2242

Re: is calibri & Helvetica font usable?

But it is important to realize that there are nearly identical looking free versions for all of these fonts Well I'm no font expert...if the name on the rpi & the "look alike" on the PC have different names, what are they? What I mean, is there a font "conversion chart" between the rpi & PC? I'm no...
by picandies
Sun Apr 22, 2018 4:11 pm
Forum: General discussion
Topic: is calibri & Helvetica font usable?
Replies: 14
Views: 2242

is calibri & Helvetica font usable?

Running some Tkinter examples, they use the standard Helvetica or Calibri font. But I noticed on the PC, things look very different, as though the rpi is not using these fonts. If I open Libre Office on the rpi, no such fonts are even listed, only some oddball sounding ones. So I'm not sure how my e...
by picandies
Mon Mar 26, 2018 3:19 pm
Forum: General discussion
Topic: GPIO access denied
Replies: 2
Views: 269

Re: GPIO access denied

However, when using IO (with the new libraries), I found you still need to use sudo (ex: sudo mono myprogram.exe) to run the program, or you will get some severe errors.

Is there a way to use the IO without needing to use sudo? Would like to be able to use the IDE (monodevelop) to run & debug.
by picandies
Sun Mar 25, 2018 5:34 pm
Forum: General discussion
Topic: GPIO access denied
Replies: 2
Views: 269

GPIO access denied

After a 2 day journey of madness, found there apparently was something that "broke" the compatibility with the mono nugget libraries (last updated 2016), causing some chip recognition issues: As far as I was able to tell it's because newest version of Raspbian report the hardware to be BCM2835 inste...
by picandies
Sun Mar 25, 2018 5:12 am
Forum: Other programming languages
Topic: GPIO throws exception ( monodevelop )
Replies: 1
Views: 1021

Re: GPIO throws exception

After a 2 day journey of madness, found there apparently was something that "broke" the compatibility with the libraries (last updated 2016), causing some chip recognition issues: As far as I was able to tell it's because newest version of Raspbian report the hardware to be BCM2835 instead of BCM270...
by picandies
Sat Mar 24, 2018 8:36 pm
Forum: Other programming languages
Topic: GPIO throws exception ( monodevelop )
Replies: 1
Views: 1021

GPIO throws exception ( monodevelop )

Hello: Made a simple control panel with monodevlop (5.10) on the rpi , following some postings on how to install and use. Using the latest Stretch install, on RPI3....Tried adding some I/O using some other examples I saw....however after adding the I/O, the control panel no longer showed . Builds fi...
by picandies
Wed Mar 21, 2018 12:04 am
Forum: Graphics programming
Topic: is there a tutorials section?
Replies: 15
Views: 2120

Re: is there a tutorials section?

If I had an idea for a graphics-based project, I'd certainly look in the graphics area for ideas and examples, as well as other posting sections. I'm just not seeing much in this or any section. This was just a general observation & topic for discussion. Apparently, controlling the hardware with gra...
by picandies
Tue Mar 20, 2018 9:47 pm
Forum: Graphics programming
Topic: is there a tutorials section?
Replies: 15
Views: 2120

Re: is there a tutorials section?

your question is not about "pi graphics I queried because my question IS about rpi graphics & determining what is fully rpi supported to form a complete solution (other than simply displaying things). The particular language is not too important, since any of them will do & I'd have to become more ...
by picandies
Tue Mar 20, 2018 3:46 pm
Forum: Graphics programming
Topic: is there a tutorials section?
Replies: 15
Views: 2120

Re: is there a tutorials section?

Make some then and start adding links. The forum is a community help forum, iirc. My original question regarding the rpi graphics: Is there a book or reference that compare the features of various packages with complete demos/tutorials? If not, then I agree it is something to address. Maybe there i...
by picandies
Tue Mar 20, 2018 3:00 pm
Forum: Graphics programming
Topic: is there a tutorials section?
Replies: 15
Views: 2120

Re: is there a tutorials section?

We do have plenty of project tutorials though, which are more in line with the Foundations aims. I didn't see any that used graphics (ex: monitor to control your fishtank). In the graphics help forum I'd expect to see links to different tutorials for doing actual graphics on the rpi, whether via th...

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