KeyTech

Easy to use Machine learning platform especially for STM microcontrollers

2021-12-10T12:03:00.006+01:00

STMicroelectronics has announced the availability of Version 3 of NanoEdge AI Studio, the first major upgrade of the software tool for machine-learning applications that ST acquired with edge AI software specialist Cartesiam earlier this year.

Source: https://www.smart2zero.com/news/machine-learning-software-makes-anyone-ai-expert

For more advanced theme about concolution AI: https://machinelearningmastery.com/how-to-develop-a-convolutional-neural-network-from-scratch-for-mnist-handwritten-digit-classification/

Cesta ku koncu času

2020-03-09T12:06:00.000+01:00

Nový článok prináša pohľad na blízku budúcnosť Zeme ako aj hlboký pohľad do budúcnosti budúcnosti Vesmíru
https://www.starup.space/clanky/cesta-ku-koncu-casu

Nantero - fast nano-tube non-volatile memory can be uses as DDR module

2018-11-11T23:08:00.000+01:00

Nantero company presents new NRAM memory based on carbon nano-tubes which is capable of DDR performance (5ns r/w access time). These memories has retention about 15000years. See more details on https://fuse.wikichip.org/news/1656/nanteros-nram-a-universal-memory-candidate/ They were tested also in space. Currently Fujistu will produce first modules in 2019 (https://hexus.net/tech/news/ram/120050-fujitsu-will-start-mass-production-nram-next-year/).

World’s first commercially available deep learning CNN accelerator chip

2018-10-21T16:11:00.004+02:00

Lightspeeur© 2801S is the world’s first commercially available deep learning CNN accelerator chip to run audio and video processing to power AI devices from Edge to Cloud

https://www.gyrfalcontech.ai/solutions/2801s/
It is based on matrix processing engine (MPE)
9.3TOps/W, 5.6TOps/100MHz

AI helps to invent new business opportunities

2018-10-21T15:52:00.003+02:00

Company Improva is delivering new machine learning & data-driven approach to invent new products and services. "We aim to invent ever faster, ever more disruptively – and as a direct result allow our customers to gain competitive advantage by bringing new differentiated and value-creating products and services to market."

How Kepler determined Mars Distance from Earth.

2018-10-17T01:44:00.000+02:00

He know the measurements of Mars positions from Tycho de Brahe.
http://www.keplersdiscovery.com/Earth.html
computation of Kepler 3 law: https://www.butkaj.com/fyzika1?id_menu=563&id_sub=91&id_left=367

Lessons learned from TinyOS

2018-10-16T00:42:00.002+02:00

Here https://www.usenix.org/node/170849 , Philip Levis, Stanford University talks about why TinyOS is not as Arduino in these days. What was wrong with design?

Here is his paper in written form: https://www.usenix.org/system/files/conference/osdi12/osdi12-final-183.pdf

About TinyOS2.0 from author in past (2007)

https://www.youtube.com/watch?v=j6hRsue5b30

TRI Analyzer

2018-05-23T00:58:00.001+02:00

In a recently published paper, Cunningham’s team used the TRI Analyzer to perform two commercially available assays—a test to detect a biomarker associated with pre-term birth in pregnant women and the PKU test for newborns to indirectly detect an enzyme essential for normal growth and development. Their tests results were comparable to those acquired with clinic-grade spectrometer instrumentation.
In addition to its applications in health diagnostics, Cunningham said the TRI Analyzer can also be applied to point-of use applications that include animal health, environmental monitoring, drug testing, manufacturing quality control, and food safety. The patented technology is available for license.

https://bioengineering.illinois.edu/news/article/23435

Paper:

https://www.researchgate.net/publication/318658063_Multimode_Smartphone_Biosensing_The_Transmission_Reflection_and_Intensity_Spectral_TRI-Analyzer

MR2001: Multi-channel 77 GHz Radar Transceiver Chipset

2014-08-11T10:22:00.001+02:00

http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MR2001&nodeId=014359FE40

Configure i2c raspbian - wheezy

2014-04-23T12:02:00.001+02:00

1. Install i2c-tools

sudo apt-get install i2c-tools

2.
On kernel version < 3.18
Disable blacklisted module i2c-bcm2708, optional disable blacklisted spi-bcm2708 in /etc/modprobe.d/raspi-blacklist.conf

sudo nano /etc/modprobe.d/raspi-blacklist.conf

Other (DT - device tree) kernel versions
Add dtparam=i2c1=on (or dtparam=i2c0=on on old models) in /boot/config.txt

3. Add module running permanently by adding text i2c-dev (at the end of file) to /etc/modules

sudo nano /etc/modules

4. Optional - add pi user to i2c group (no need for sudo while using i2c tools)

sudo adduser pi i2c

5. list available buses
i2cdetect -l

6. Try detect devices on bus (I2c1 - rpi rev3)
i2cdetect 1

7. Try get data from your chip
i2cget -y i2c-bus device-address register-address [b | w]
ex.
i2cget -y 1 0x60 0x02 b

8. Try set data to your chip
i2cset -y i2c-bus device-address register-address data [b | w]
ex.
i2cset -y 1 0x60 0x02 0x55 b

9. When i2c device is used by driver, you must use -f (force) parameter in i2c commands

More info:
http://www.lm-sensors.org/wiki/i2cToolsDocumentation
http://www.abelectronics.co.uk/i2c-raspbian-wheezy/info.aspx

Sainsmart display (320x240 LCD - 3.2'') (SSD1289 controller) framebuffer driver + touch (ADS7843) for RasperryPi

2014-04-19T01:41:00.003+02:00

Sainsmart display become popular on Ozzmarket.com because it is very cheap (ebay) and also because Marks-Space kickstarter campain starts promotion LCD displays for RaspberryPi. Their LCD display is based on different LCD driver controller (ILI9481) and different touchscreen controller (XPT2046) than SainSmart LCD. Sainsmart display is based on SPI SSD1289 chip with ADS7843 4-WIRE touch controller.

Sainsmart display has 40 pin - two row connector. For connecting to RaspberryPi following connections is needed:

It is possible to power it also from 3.3V(pin 2) (I use it). Schematic explanation can be found on Valdovov page

Running sainsmart display under raspberyPi
Under Linux all similar small TFT displays use common fbtft layer - Linux Framebuffer drivers for small TFT LCD display modules. This layer is written for new Linux kernels, therefore I used 3.10.33+ kernel. Base raspbian "wheezy" image with included fbtft drivers (compiled as modules) can be downloaded from this page: https://github.com/notro/fbtft/wiki
Direct link for downloading image 2014-01-07-wheezy-raspbian-2014-03-12-fbtft-master-firmware.zip
It is also possible to upgrade your running kernel - no need to download new image. Try this tutorial for upgrading your kernel. We use our downloaded Raspbian image.
Now copy unzipped file to your SDcard.

$unzip 2014-01-07-wheezy-raspbian-2014-03-12-fbtft-master-firmware.zip - d <your destination folder>

$dd if=2014-01-07-wheezy-raspbian-2014-03-12-fbtft-master-firmware.img of=/dev/mmcblk0

All fbtft module drivers are stored in /lib/modules/<your kernel version>/kernel/drivers/video/fbtft/ directory. You can check whats inside.
After booting image (this image expands partition first) run this command for running sainsmart driver:

$sudo modprobe fbtft_device name=sainsmart32_spi rotate=90 speed=16000000 debug=$((1<<5)) gpios=reset:25,dc:24

Check your gpio connection if it matches to your schematic. Now type

$dmesg

Now you should see something something like this:

...

[ 28.903126] Adding 102396k swap on /var/swap. Priority:-1 extents:2 across:2723836k SSFS

[ 334.704250] fbtft_device: SPI devices registered:

[ 334.704304] fbtft_device: spidev spi0.0 500kHz 8 bits mode=0x00

[ 334.704322] fbtft_device: spidev spi0.1 500kHz 8 bits mode=0x00

[ 334.704332] fbtft_device: 'fb' Platform devices registered:

[ 334.704352] fbtft_device: bcm2708_fb id=-1 pdata? no

[ 334.704417] fbtft_device: Deleting spi0.0

[ 334.933076] fb_ssd1289 spi0.0: Display update: 1797 kB/s (83.404 ms), fps=0 (0.000 ms)

[ 334.938457] graphics fb1: fb_ssd1289 frame buffer, 320x240, 150 KiB video memory, 4 KiB DMA buffer memory, fps=20, spi0.0 at 16 MHz

[ 334.938560] fbtft_device: GPIOS used by 'sainsmart32_spi':

[ 334.938579] fbtft_device: 'reset' = GPIO25

[ 334.938590] fbtft_device: 'dc' = GPIO24

[ 334.938599] fbtft_device: SPI devices registered:

[ 334.938615] fbtft_device: spidev spi0.1 500kHz 8 bits mode=0x00

[ 334.938629] fbtft_device: fb_ssd1289 spi0.0 16000kHz 8 bits mode=0x00

[ 365.483655] fb_ssd1289 spi0.0: Display update: 1784 kB/s (83.695 ms), fps=0 (30550.286 ms)

[ 365.566928] fb_ssd1289 spi0.0: Display update: 1794 kB/s (83.189 ms), fps=11 (83.782 ms)

Now try to start X11 on your new fb device /dev/fb1

$FRAMEBUFFER=/dev/fb1 startx

For enabling touch screen driver run:

$sudo modprobe ads7846_device verbose=2 cs=1 speed=2000000 model=7843 x_min=300 x_max=3800 y_min=700 y_max=3400 x_plate_ohms=60 pressure_max=255 gpio_pendown=17 keep_vref_on=1 swap_xy=1

Check your gpio connection if it matches to your schematic.

For testing functionality type

$cat /dev/input/event0

or more sophisticated output

$evtest

//if not installed type

$sudo apt-get -y install xinput evtest

For tuning ads7846 module driver parameters see description:

https://github.com/notro/fbtft_tools/wiki/ads7846_device

Calibrate touch screen for X11

At beginning, you can read more about resistive touchscreens principle here. You can skip reading this article, but in general, after reading it, you will have more knowledge to deal with problems.

Run
DISPLAY=:0.0 xinput_calibrator

you should get result like this:

Calibrating EVDEV driver for "ADS7843 Touchscreen" id=6 current calibration values (from XInput): min_x=421, max_x=3869 and min_y=351, max_y=3818

Doing dynamic recalibration: Setting new calibration data: 372, 3863, 274, 3836

--> Making the calibration permanent<--
copy the snippet below into '/etc/X11/xorg.conf.d/99-calibration.conf'
Section "InputClass"
Identifier "calibration"
MatchProduct "ADS7843 Touchscreen"
Option "Calibration" "372 3863 274 3836"
EndSection

Edit 99-calibration.conf and add result from xinput_calibrator
sudo nano /etc/X11/xorg.conf.d/99-calibration.conf

In ubuntu there is one file for evdev input configuration: /usr/share/X11/xorg.conf.d/10-evdev.conf

You can find here InputClass section for touchscreen:

Section "InputClass"
Identifier "evdev touchscreen catchall"
MatchIsTouchscreen "on"
MatchDevicePath "/dev/input/event*"
Driver "evdev"
# Option "Calibration" "389 3837 344 3755"
# Option "InvertX" "false"
# Option "InvertY" "false"
# Option "SwapAxes" "1"

EndSection

It is possible to add configuration parameters for touchscreen here (try remove # )

Note!!!:
Editing 99-calibration.conf doesn't worked for me!.

I found that, after first start xinput_calibrator, it create new file (/etc/pointercal.xinput)containing calibration data. This data are taken as default for X11. Therefore we need to delete this file after any xinput_calibrator is started again.

sudo rm /etc/pointercal.xinput

Calibration log is stored in /var/log/xinput_calibrator.pointercal.log

See more (https://github.com/tias/xinput_calibrator/wiki/Making-calibration-values-permanen)

Getting current config for touchscreen or any input device

Run xinput and get pointer ID for your device

DISPLAY=:0.0 xinput

now list properties for specified ID

DISPLAY=:0.0 xinput list-props <your_device_ID>

cat /var/log/Xorg.0.log

You can set properties for display by set-props parameter. We can use it for touchscreen axis rotation:
DISPLAY=:0 xinput --set-prop 'ADS7846 Touchscreen' 'Evdev Axis Inversion' 1 1

Calibrate touch screen with tslib
export TSLIB_FBDEVICE=/dev/fb1
export TSLIB_TSDEVICE=/dev/input/event0
sudo ts_calibrate
sudo ts_test

See more:
https://learn.adafruit.com/adafruit-pitft-28-inch-resistive-touchscreen-display-raspberry-pi/touchscreen-install-and-calibrate
http://blog.pi3g.com/2014/04/touchscreen-calibration-with-gui/

For calibrating touch also see tutorial:

https://github.com/notro/fbtft/wiki/Touchpanel#-ads7846-driver-calibration

Make permanent sainsmart32_spi TFT driver (Debian)
Add to file /etc/modules
fbtft_device name=sainsmart32_spi rotate=90 speed=16000000 debug=0 gpios=reset:25,dc:24

There is one nice article about how resistive touch screen works and how to calibrate them:
http://www.embedded.com/design/system-integration/4023968/How-To-Calibrate-Touch-Screens

Links:

Official fbtft wiki:
https://github.com/notro/fbtft/wiki
Hints for Frame buffer can be found here:
https://github.com/notro/fbtft-spindle/wiki/FBTFT-image

Supported fbtft devices:

https://github.com/notro/fbtft/wiki/LCD-Modules
SSD1289 driver description:
https://github.com/notro/fbtft/wiki/SSD1289
Setting image while booting:
https://github.com/notro/fbtft/wiki/FBTFT-shield-image
Performance tests and with module insertion commands
https://github.com/notro/fbtft/wiki/Performance
Some hints how to build drivers under raspberry
http://www.raspberrypi.org/forums/viewtopic.php?f=64&t=33679
http://ozzmaker.com/2012/11/23/raspberrypi-tft/

Some raspberryPi 320x240 LCD blog
http://www.raspberrypi.org/forums/viewtopic.php?f=64&t=33679

new IoT BT chip

2013-12-06T10:37:00.001+01:00

http://www.csr.com/products/csr101x-product-family

low power oscilator design

2013-10-16T11:44:00.001+02:00

http://www.planetanalog.com/author.asp?doc_id=561222&cid=planetanalognewsletter&elq=2f32c46d6d974681a83c14d48c6de476&elqCampaignId=1696

Ultra fast surface mount device positioning robot

2013-08-03T11:35:00.001+02:00

'Terminator' arm is world's most advanced prosthetic limb

2013-07-25T08:34:00.001+02:00

lightweight tricoder frim startrek

2013-07-23T15:09:00.004+02:00

ECG using Python on the Android Smartphone

2013-06-23T11:17:00.003+02:00

http://www.smartphonedaq.com/android-python-ecg.page

new beaglebone

2013-06-08T20:23:00.000+02:00

Processor: AM335x 1GHz ARM® Cortex-A8

3D graphics accelerator
NEON floating-point accelerator
2x PRU 32-bit microcontrollers

Connectivity

USB client for power & debug
USB host
Ethernet
HDMI
2x 46 pin headers

Software Compatibility

Ångström Linux
Android
Ubuntu
Cloud9 IDE on Node.js w/ BoneScript library
plus much more

http://beagleboard.org/Products/BeagleBone%20Black
http://beagleboardtoys.info/index.php?title=BeagleBone_3.1MP_Camera

Touch electronic - Hack a banana, make a keyboard!

2013-06-08T19:06:00.002+02:00

http://web.media.mit.edu/~silver/drawdio/make.php
http://web.media.mit.edu/~silver/
http://www.makeymakey.com/

The Modern Motorcycle Diaries

2013-05-05T11:31:00.001+02:00

Plasma in space

2013-04-29T10:28:00.001+02:00

psychology: Why we work? What we are able to do for money? When we are happy while working?

2013-04-21T10:46:00.001+02:00

Do not nissuse.

Crowdsourced medical diagnosed

2013-04-20T23:10:00.004+02:00

Cool idea to help people with non-standard diseases. Visit: ttps://www.crowdmed.com/

3d knitting machine

2013-04-20T22:05:00.001+02:00

wearing made by 3D knitting machine

2013-04-20T21:49:00.001+02:00