Forum - Recent Threads

tinyTILE - Intel Curie BLE not working

kimlorentz — Thu, 24 Aug 2017 20:05:45 GMT

I got an tinyTILE and the BLE is not working.

How do I fix it? or where can I find BLE/tinyTILE firmware to re-flash it?

RE: tinyTILE - Intel Curie BLE not working

cortbuchholz — Wed, 18 Oct 2017 18:28:10 GMT

Kim, were you able to resolve this issue?

RE: Using a VL53L05X TOF sensor with TinyTILE-How?

steve_s — Sun, 17 Sep 2017 19:35:29 GMT

I know it's a while since you posted this, but I have been looking at something similar - here is what I found; I hope it helps:

As I understand it the Tinytile has 4 different I2C buses - two from the ARC core and 2 from the Quark core. If you want to use standard Wire library based Arduino code then connect to A4 for SDA and A5 for SCL. (This connects to one of the ARC I2C buses). I think this will likely work with your I2C device with standard Arduino libraries and will likely work with libraries for your sensor.

You could alternately access the Quark I2C bus 0 via SDA and SCL pins on the module for bus I2C0. The I2C1 bus can be accessed via the test pads under the Tinytile. To use either of these you need to use quarki2c.h and associated libraries instead of Wire as explained in the extended library support link that you mentioned and you will also need to modify any existing Arduino libraries you are using to access your sensor accordingly.

Using a VL53L05X TOF sensor with TinyTILE-How?

djsb — Sat, 29 Apr 2017 07:28:19 GMT

Hello,

I would like to us an ST VL53L0X TOF sensor with my TinyTILE board. I have connected the SCL pin on my Pololu Board

Pololu - VL53L0X Time-of-Flight Distance Sensor Carrier with Voltage Regulator, 200cm Max

to the I2C0_SCL and the SDA pin to I2C0_SDA pins on the TinyTILE. I have tried using the library mentioned here

GitHub - pololu/vl53l0x-arduino: Pololu Arduino library for VL53L0X time-of-flight distance sensor

but I can't get it to work.

I'm wondering if I would have better luck using these I2C examples from here

tinyTILE-Extended-Support-Library/examples at master · 01org/tinyTILE-Extended-Support-Library · GitHub

Some basic questions.

1/ How would I use the above TILE-Extended-Support-Library in the Arduino IDE?

2/ Have I connected the sensor board to the correct I2C pins? There are 2 other pins on the TILE. Should I use these instead?

3/ How would I adapt the above Arduino libraries (I.E include header files etc).

4/ I just want to start off small so a good start would be to retrieve the model ID etc from the sensor and do a basic measurement. How would I begin?

I hope someone can help. Thanks.

PS This question has also been asked on the intel community forum here

https://communities.intel.com/message/470705#470705

I was redirected here.

RE: Using a VL53L05X TOF sensor with TinyTILE-How?

tans — Sun, 06 Aug 2017 12:31:21 GMT

If you're still interested in this, I ported the API to an Atmel XMega. I plan to put up a blog post about it soon, but as a tl;dr - the source code is *not* easy to understand, and there are annoying inconsistencies in how things are structured. There is one redeeming feature though - you only need to edit one .c and one header file to adapt to your target, and then it does just work.

Edit - also, remember to fit the appropriate pullups for the I2C interface if your board doesn't have them already.

Curie powered microcontroller module

Workshopshed — Tue, 04 Jul 2017 05:27:16 GMT

The Gumstix Radium 96BIE is a little board that meets the 96boards IoT Edition standard. You can programme it using the Arduino IDE or advanced users can solder on a JTAG header. Also an onboard is bluetooth radio.

[View:/resized-image/__size/620x443/__key/communityserver-discussions-components-files/140/6825.contentimage_5F00_85087.png:620:443]

https://store.gumstix.com/radium-96bie.html

ADC For Compound Eye on Edison

vandia — Wed, 24 May 2017 08:31:56 GMT

Hi, this question is possibly specific to a couple of different requirements, partially because *spoiler* I have no clue what I'm doing! XD

Seriously though, I'm going to want to connect my Compound Eye (IR Sensor) at some point to my Edison on an Arduino Breakout Board.

I'm programming in Python, and while I'm familiar with how they work/what they do, I don't really know:
-how to communicate with one via GPIO

-how to connect the compound eye: Can 1 ADC read multiple inputs, and relay it digital to a single GPIO?

-If so, what should I look for when comparing? I'm actually going to need at least 5 extra inputs.
-if so, how would I relay that information in Python?
I only recall experience turning GPIO on/off, reading if it's powered, and with writing I2C.

I'm already using 1 I2C device (screen), if that's how they communicate, and am considering using a second. As such, I also know you can't always choose the address of the buses, and may get a conflict.

I'm limited to using only 4 Analog Inputs on the Edison, with all 4 already used reserved now, without starting with the Compound Eye yet, before someone asks why I need this.
The Atmega chip conflicts A4/5 with SCL/SDA, so using I2C, I have to find another communication.

I'm sorry, as I know parts of this may belong somewhere, or has been asked somewhere.... but it would also likely be difficult for me to piece that information together. I know things are largely undocumented still with the Edison, and even though it works similar to the RPi, that it's GPIO handler and the Edison's (MRAA) work a bit differently in coding; I did not want to be confused by this either. Again, please forgive me my ignorance on this. If it's included in the microcontrollers class, I plan to take that, but it would still unlikely answer how to program it in python with MRAA.

Thanks for your time!

RE: ADC For Compound Eye on Edison

rachaelp — Sat, 27 May 2017 08:58:15 GMT

vandia wrote:

Didn't he reference both, nanoseconds and uS? I thought both were 1/1000th though then? *confused*

ms = millisecond = 1/1000th of a second

us = microsecond = 1/1000000th of a second

ns = nanosecond = 1/1000000000th of a second

ps = picosecond = 1/1000000000000th of a second

The list goes further but its unlikely you'll need to worry about ps (and not even ns or us for this) let alone those beyond....

Best Regards,

Rachael

RE: ADC For Compound Eye on Edison

vandia — Sat, 27 May 2017 08:51:27 GMT

Didn't he reference both, nanoseconds and uS? I thought both were 1/1000th though then? *confused*

RE: ADC For Compound Eye on Edison

balearicdynamics — Sat, 27 May 2017 06:22:03 GMT

Usally it stay for micro seconds as the micro character from Greek character is not available while writing on the US keyboards.

Enrico

RE: ADC For Compound Eye on Edison

vandia — Sat, 27 May 2017 04:46:45 GMT

Need something to update about a few times a second, to detect objects in front of me. I'm then using I2C to print that to a screen as I get it.

RE: ADC For Compound Eye on Edison

vandia — Sat, 27 May 2017 04:45:40 GMT

And.... I probably should know.... but uS means....?

RE: ADC For Compound Eye on Edison

shabaz — Sat, 27 May 2017 02:18:46 GMT

I didn't understand entirely what the intended design is, but if you're using Python, it would be worth checking what speed you can control I/O at. It could be a lot slower in Python than using compiled code in other languages like C. At least, it was almost two orders magnitude slower on the Pi, I have not tried on Edison.

Also, usually precise time can't be guaranteed from a user application due to the nature of Linux, that may or may not be an issue depending on what you wish to do.

RE: ADC For Compound Eye on Edison

mcb1 — Sat, 27 May 2017 01:08:26 GMT

Do you happen to have an estimate on the actual delays between the onboard, GPIO connected, and I2C ADCs?

Sorry no I don't.

This one suggests a conversion time of 3.2uS but there are some other figures that may override that,

http://www.analog.com/media/en/technical-documentation/data-sheets/AD7291.pdf

TI have one that talks about 1uS

http://www.ti.com/lit/ds/symlink/adc121c021.pdf

The Edison Arduino board uses the ADS7951 converter.

http://www.ti.com/lit/ds/symlink/ads7951-q1.pdf

The sheet suggest 800nS.

Since it is multiplexed, you could assume the data is there, but the Edison then polls for it, so in reality 'live' updating is going to be slower.

balearicdynamics is embarking on an I2C series, and this might be a great topic.

Mark

RE: ADC For Compound Eye on Edison

vandia — Thu, 25 May 2017 16:12:24 GMT

Thanks! Do you happen to have an estimate on the actual delays between the onboard, GPIO connected, and I2C ADCs?
Or, at the very least, be able to tell me what "stat" I'm looking for that's important between these (besides price, lol).

RE: ADC For Compound Eye on Edison

mcb1 — Thu, 25 May 2017 05:39:44 GMT

Edison and ADC throw some extra issues.

It is a multiplexed arrangement, where an extra chip is involved, as opposed to many of the other uP's.

This may have the effect of slowing it down.

You may have more luck with I2C ADC chips and deal with it that way.

Mark

RE: ADC For Compound Eye on Edison

vandia — Wed, 24 May 2017 19:36:02 GMT

I'm sorry, I'm still catching up on some terminology.
Either that, or because I wasn't to bed yet (4:30am), I thought by "frequency" you meant how quickly it can check/carry, not like baudrate. XD

Maybe.... do ADCs usually read and transfer pretty quickly? If not, for what I plan to use the screen for, I may move my directional sensors to the ADC (only checked once/sec), and plug the eye for it when I'm ready directly into the board (needs to update a little more in realtime, let's say 1/5 a sec. I'd have to change some code, but is the speed to read an ADC much slower externally?

Thanks so much for your input!

RE: ADC For Compound Eye on Edison

rachaelp — Wed, 24 May 2017 10:02:52 GMT

vandia wrote:

So, I'd need to read all at about the same time, if that would be possible?

I don't know what sample rate you need for the Compound Eye but lets for arguments sake say you need to sample it at 1KHz. Lets assume you have an ADC which has multiple inputs and can switch inputs and sample at a rate of 1MHz, that would mean you'd be able to take the four samples for the Compound Eye, each sample being 1us apart in time and then the Compound Eye's overall sample groups would be at an interval of 1ms. So substitute the above for the actual values you need for the system and the ADC you plan to use and if you get values which give you the "about the same time" that you need then you should be ok.

I've got to do some actual work this morning so I will take a look at your blog post in more detail later. I did have a quick look earlier, it looks interesting

Best Regards,

Rachael

RE: ADC For Compound Eye on Edison

vandia — Wed, 24 May 2017 09:40:46 GMT

For sampling, in case you don't know, the Compound Eye is used to basically triangulate objects with IR sensors. I pass the sensor value to the processor, and it's usually used to triangulate the closest or furthest object.

So, I'd need to read all at about the same time, if that would be possible?

I'm still free a few GPIOs, with my GPIO listings here, for what I plan to use this on:
Intel-Powered Mech (DW Juggernaut)

In short, I have a number of GPIOs still free, but for analog, I need:
-To read 4 analog for the Compound Eye
-To read a rheostat

-To possibly switch my Sonic sensors to mid-range SHARPs.

Thanks for the help so far!

RE: ADC For Compound Eye on Edison

rachaelp — Wed, 24 May 2017 09:21:36 GMT

I can't answer your Edison related questions as I haven't used one but for your ADC question about how to read multiple inputs, then the answer is yes you can depending upon a few factors. You need to consider the maximum sample rate of the ADC and think how fast you need to sample each of the inputs. You also need to factor in an time it takes to "switch" different inputs to the one ADC and allow settling time. So when you factor all this in, if you have enough time to sample at the rate you need then you can do it. Is the ADC you are referring to one built into the Edison or is it an external ADC you are planning to use? If it's external then you can get ADC's with a built in multiplexor to take multiple inputs to a single ADC channel. The problem will be controlling it if you are short on GPIO. Maybe if you put up a quick sketch of how you think your system should fit together it might help us give you more ideas on how to proceed.

With regards to the Edison, there are a few on here who have done quite a bit recently, hopefully one of them will see this thread and jump in.

Best Regards,

Rachael

RE: MRAA and I2C Display

vandia — Tue, 23 May 2017 07:18:34 GMT

So, according to: http://www.intel.com/content/dam/support/us/en/documents/edison/sb/edison-arduino-hardware-guide.pdf

Don't use Analog 5/6 if you plan to use I2C, they both use the same Arduino pin.
This seems to be a thing with the Atmega chip, not the Edison itself.I hope this helps someone in the future!

For Future Search Results of others:
Can't Read Analog while using I2C because shared pin on Arduino Edison
Above is worded in a way search engines would recognize it, please excuse the grammar, normal folks!

I sincerely thank you for your input, Andy! But since I already thought of that, and had to find the documentation myself, I'm marking this the correct answer for having a direct reference to conflicting pins (and changing tags).

MRAA and I2C Display

vandia — Mon, 22 May 2017 21:44:54 GMT

Pastebin URL: https://pastebin.com/QgCNn7eD

Anyhow, I'm using the SSD1306 I2C screen module. I'm programming in Python, and have it working pretty well, for the most part.hat is,

Until I try to use MRAA to read analog inputs. Suddenly, the screen will not turn on.

With the commented section commented, the screen turns on. Uncommented, it turns off, even though the code still runs in the terminal.

Has anyone else had this problem, is it documented somewhere, or is something else wrong that I'm doing, involving using both?

RE: MRAA and I2C Display

Workshopshed — Tue, 23 May 2017 06:07:46 GMT

Perhaps in the hardware guide for the Edison breakout? There are ways to emulate an analogue pin with two digital pins and a timer if you need or an external A-D chip

RE: MRAA and I2C Display

vandia — Tue, 23 May 2017 05:48:47 GMT

Thanks for the reply!

I actually just thought of that idea literally less than 5 minutes ago.
Is there a list of shared pins? I'm not really used to the concept, except for also controlling an LED.

I'm using analog pin 5, for the record.
My problem with this is, what's the easiest/cheapest way to use multiple analog inputs then, in Python?
I'd like to reserve 4 for the Compound Eye later, but apparently need 4 analog inputs for that, while there's only 5 on the Edison...

I'll try to get back to the Edison and this idea tomorrow, in the meantime. ^_^

RE: MRAA and I2C Display

Workshopshed — Tue, 23 May 2017 05:20:14 GMT

There are shared pins on the Edison, is that analogue pin used for something else? Have you tried a different pin?