TC_Chu's Point

Protothreads

http://dunkels.com/adam/pt/

Main features:

• Very small RAM overhead - only two bytes per protothread and no extra stacks
• Highly portable - the protothreads library is 100% pure C and no architecture specific assembly code
• Can be used with or without an OS
• Provides blocking wait without full multi-threading or stack-switching
• Freely available under a BSD-like open source license

Example applications:

• Memory constrained systems
• Event-driven protocol stacks
• Small embedded systems
• Sensor network nodes
• Portable C applications

Simple is Beauty

http://dunkels.com/adam/pt/examples.html#driver

Nios2 on Max10 use External UART

It works. 

Nios2 on Max10 (JTAG_UART not working)

Play Altera Nios2 on BeMicro Max 10 for 2 days.

Still cannot get Jtag-UART output.

Give up. Because same setting test on DE0-Nano is working.

PS.Try add PLL, BeMicro Sample project,.....Still not working. 

Next:Add UART module instead of Jtag-uart

 

E310-G0000 1st Commercial RISC-V Chip

Hand on sifive's hifive1 board

Follow the instruction guide. -> sifive documentation url

If you want to learn programming. Install arduino tool. -> arduino download url

After install arduino 

Check ~/.arduino15/packages/sifive/

There are library provide by sifive.

You can check and see how to program the peripherals

Computer Organisation and Design RISC-V Edition

2017-(47)

又回到工專時代 研究Computer Architecture

說真的 沒什麼進步

不過倒是由繁而簡 倒是一種進步

トラ技 2014-03 LPC11U35 PCB

1.Drag and Drop update firmware.bin won't work on Mac and Ubuntu.

PS.You need to use "Terminal" program do use "cp" command. or Follow the screen shot!

2.No matter what filename you drag in, next time it will show "Firmware.bin"

3.If you delete the "Firmware.bin", next time it still will show up "Firmware.bin"

(You cannot really delete the file)

Detecting human falls with 3-axis accelerometers

Here is an article from Analog Devices discussing the theory and application of detecting human falls with 3-axis accelerometers. While the article focuses on the ADXL345 3-axis accelerometers, the theory and principle behind it can be applied to other devices as well.

via dangerousprototypes

SolderCore CPU with Interactive and Internet-enabled CoreBASIC Interpreter

 

Hardware

In addition to the standard Arduino interfaces the SolderCore provides USB OTG (micro AB) and 10 or 100mbps Ethernet (RJ45).  SolderCore adds new peripheral support to the Arduino platform including I2S, CAN and a second I2C port.  Furthermore the board also supports a number of storage devices including microSD and FRAM. SolderCore is compatible with existing Arduino Shields and the hardware design will be available under a Creative Commons Non-Commercial license.

Features

• Arduino Form Factor
• Based upon a 80 MHz Cortex-M3
• 512KB Flash, 96KB contiguous RAM
• Built in Ethernet support with an on-board RJ45 connector.
• USB OTG support with an on board microAB connector.
• On board microSD holder.
• Support for additional Flash and FRAM devices.
• CAN, I2S, 2xI2C, UART, PWM, ADC, SPI and QEI supported
• On board standard 10 way SWD JTAG header. (Only fitted to the Commando variant)
• Power can be supplied via USB or the barrel jack (6V – 9V DC).

Note: Not all hardware peripherals are currently supported by CoreBASIC, please refer to theCoreBASIC manual for details of CoreBASIC hardware drivers.

 

Software

The SolderCore was designed in conjunction with CoreBASIC.  CoreBASIC is a programming language for embedded micro controllers. It's easy to use, it's powerful, and most of all it's interactive.

Features

• High level BASIC language designed for ease of use.
• Lightning fast, based upon CoreOS and highly optimised TCP/IP and FAT software stacks.
• Support for over 50 plug-in shields, from third-party vendors.
• Complete self-contained development environment accessed using FTP or web browser.
• Simple update feature so you have access to the latest revision.
• Rich set of math functions:
  • Complex Numbers.
  • Trigonometry, Hyperbolic and logarithmic functions.
  • Matrices.
  • Quaternions.
• Network support (SMTP, HTTP, FTP, DNS, TELNET plus more).
• Vector graphics support.
• Mass storage support.

---

Technical Details:

• Datasheet
• Eagle Files
• Schematic (PDF)
• 3D File (Google Sketchup)
• 3D File (PDF)
• CoreBASIC Documentation

 

http://soldercore.com/products/soldercore/

Successful PCB grounding with mixed-signal chips

via Dangerous Prototype

App note: Comparing serial data protocols

via dangerousprototype

Cubieboard: Another Linux computer on a board

Cubieboard is another Linux computer-on-a-board type device. It features a 1 GHz ARM Cortex A8 CPU, with 1GB of DDR3 RAM, and the Mali400 OpenGL ES GPU with HDMI output.

What sets it apart from the popular Raspberry Pi, is it’s 96 GPIO pins and SATA support. Unfortunately we were unable to find more information about it, other then the specs, and the $49 price-tag.

Via Make Magazine.

This entry was posted in ARM, dev boards and tagged Cortex A8, Cubieboard, Linux.

via dangerousprototypes

Redpark TTL internal

From Evernote:
Redpark TTL internal



STM32 & apple encryption chip !

Little Wire

========================================
= What is this?
========================================
- usbtiny compatable AVR programmer in minimal form factor with all through hole components
- Computer controllable (via USB) additional features: 
    - 4 channel digital input / output
    - ADC with 10 bit resolution
    - 2 paralel hardware PWM outputs  
    - SPI interface
    - I2C interface
- Includes onboard serial bootloader for firmware upgrades! 
- You can use it for “Printf style debugging over AVR-ISP pins!”
- USB to UART converter , by loading an other firmware (CDC-232 port)

http://littlewire.cc/

Open source USB stack ported to ORbit16

Hexapod ported the open source USB stack to his ORbit16 USB development board. The board supports both PIC32 and PIC24 microcontrollers. All the pins are broken out to two female headers, with each pin having 2 connections.

via Dangerous Prototype

SerialChart – Analyse and chart serial data from RS-232 COM ports

SerialChart – Analyse and chart serial data from RS-232 COM ports - [Link]

via http://www.electronics-lab.com/blog/?p=19003

Printer Driver

CUPS is the standards-based, open source printing system developed by Apple Inc. for Mac OS^® X and other UNIX^®-like operating systems

http://www.cups.org/

http://www.lvr.com/code/printer.c <-- Reference

Sending data to Google Spreadsheets with PICmicro Doc: FTPMicro temperature monitor

Monitor the temperature (or any other quantity) from anywhere in the world and share data on the cloud Google Spreadsheet is possible and quite simple thanks to FTPMicro and some implementations the TCP / IP stack Microchip.

Would you like to monitor the temperature of your refrigerators or any other devices scattered around the world and send data in real time on a document type Spreadsheets? And if this document was always online and accessible from anywhere in the world?Everything is possible if you have an internet connection, a Google Account and a PICmicro handy :)

via it.emcelettronica.com

 

Touché: Touch and Gesture Sensing for the Real World.

Touché is a new sensing technology that proposes a novel Swept Frequency Capacitive Sensing technique that can not only detect a touch event, but simultaneously recognize complex configurations of the human hands and body during touch interaction. This allows to significantly enhances touch interaction in a broad range of applications, from enhancing conventional touchscreens to designing interaction scenarios for unique use contexts and materials. For example, in our explorations we added complex touch and gesture sensitivity not only to computing devices and everyday objects, but also to the human body and liquids. Importantly, instrumenting objects and material with touch sensitivity is easy and straightforward: a single wire is sufficient to make objects and environments touch and gesture sensitive.

http://www.disneyresearch.com/research/projects/hci_touche_drp.htm

Electric imp

http://www.electricimp.com/

In essence, the Imp provides an easy, integrated way to connect almost any hardware device both to other devices and to internet services. It's more than just a WiFi card, or even a WiFi module with processing built in - it's an integrated platform that deals with the drudgery of connectivity, allowing you to concentrate on the application instead of the mechanics.

The Imp itself is very small - 32mm x 24mm x 2.1mm - but packs a lot inside.

For starters, there's industry standard 802.11b/g/n WiFi, complete with WEP, WPA and WPA2 encryption, along with a great antenna.

Next, there's the processor. A Cortex-M3 core gives great performance combined with low power consumption, allowing the Imp to deal with both maintaining a secure connection to the service and also executing the developer's code in a stable environment.

Finally, there's the I/O. Though there are only six pins available for application use, they're six very capable pins. UARTs, I2C, SPI, analog in and out, PWMs, GPIOs... all selectable under software control.

 

 

16FUSB - A USB 1.1 implementation for PIC16F628/628A

The development of such a firmware really isn't a trivial thing, especially taking into account the limitations of a simple microcontroller, such as the PIC16F628/628A, especially with regard to its speed.

A PIC16F628/628A can work with frequencies up to 20MHz. However, each instruction cycle takes four clock cycles. This means that, in fact, with a 20MHz crystal we have our PIC running on 5MHz (20 / 4 = 5). Doing a little overclock, with a 24MHz crystal, we can run programs on 6MHz (or 6Mips). Since the speed of the USB low-speed is 1.5 Mbps, we can obtain a total of four instructions (6 / 4 = 1.5) to treat each bit of data during transfer. That is, each bit of the USB bus takes the time of four instructions of our PIC.

 

http://www.lendlocus.com/?q=16fusb

Seeed Studio open hardware manufacturing tour

http://dangerousprototypes.com/2012/04/18/seeed-studio-open-hardware-manufacturing-tour/

我常跟這家在大陸的電子電路板生產公司買東西 很便宜 服務也很好！

USB Keyboard Demonstration

via dangerousprototype

PSOC 1 FSK Testing

Reference to Cypress AN2336

接下來要把速度Push到9600bps看看 有沒有機會 1200bps有點慢！

App note: Enhancing ADC resolution by oversampling

When the ADC samples a signal, it quantizes the signal in  discrete steps. This introduces some error, often referred to as  quantization error. Normal averaging will only even out signal fluctuations, while Decimation will increase the resolution. In a  4- times-oversampled signal, four adjacent data points are averaged to produce a new data point. Which frequency to oversample the signal with, can be calculated by equation 3-1.

Adding these extra samples and right-shifting the result by a factor n, yields a result with resolution increased by n bits. Averaging four ADC results to get a new ADC result is the same as if the ADC sampled at ¼ of the rate, but also has the effect of averaging the quantization noise, which improves SNR. This will increase the ENOB and reduce the quantization error. With the availability of faster ADCs and with low memory cost, the advantages of oversampling are cost effective and desirable

via dangerousprototypes

 

PSOC 1 CY8C29466

新玩具 300NTD CY8C29466 + 書上的PCB + Cypress PSOC Designer 5.2 雖說是舊東西了 可是網路上似乎不是那麼的普遍 不過玩了一星期了 還蠻容易上手的 （要看很多Application Note 比較快）

目前已經完成 1.Time Tick 2.I/O Access Simple Macro 3.UART 4.I2C

接下來就是 5.ADC 2.FSK (for iphone) 哈哈哈！

Atmel Studio 6 Beta

http://www.atmel.com/Microsite/atmel_studio6/default.aspx

Ninja Blocks: Connect your world with the web.

My interpretation : A device that connect to internet. It can listen to you command via different source say Twitter or plain web page. It also respond to different source say facebook ...

http://www.kickstarter.com/projects/ninja/ninja-blocks-connect-your-world-with-the-web

HOW-TO: Get your PCBs manufactured

很不錯的說明! 自己Layout時可以先注意

via dangerous prototype

Upgrading BeagleBone to Angstrom

1) Inserted Micro SD into SD holder, and inserted into computer.

2) Used Ubuntu Disk Utility to unmount and delete all volumes on card. 3) Executed: sudo sh makecard.txt /dev/sdb

4) Executed: zcat Angstrom-Cloud9-IDE-eglibc-ipk-v2011.12-core-beaglebone-2011.12.26.img.gz > /dev/sdb

5) Ejected card from Ubuntu.

 

via http://datamanlv.blogspot.com/2011/12/upgrading-beaglebone-to-angstrom.html

other reference:

http://borderhack.com/?p=1062 

LUFA (2012)

LUFA (Lightweight USB Framework for AVRs, formerly known as MyUSB) is my first foray into the world of USB. It is an open-source complete USB stack for the USB-enabled Atmel AVR8 and (some of the) AVR32 microcontroller series, released under the permissive MIT License (see documentation or project source for full license details). The complete line of Atmel USB AVRs and USB AVR boards are supported by the library, as are any custom user boards, via custom board hardware drivers supplied by the user.

http://www.fourwalledcubicle.com/LUFA.php

Accurately Measuring Temperature Using PSoC3/PSoC5

The PSoC Creator Component solves one part of the puzzle: converting the measured resistance accurately to temperature. The bigger part is finding the resistance accurately. AN70698 discusses the pros and cons of some circuits commonly used for measuring resistance and describes a method (shown below) where the resistance can be measured accurately using PSoC3/PSoC5 s IDAC, 20-bit delta sigma ADC and one precise external resistance.

http://www.cypress.com/?rID=58448

Homemade GPS receiver

http://dangerousprototypes.com/2011/11/24/homemade-gps-receiver/

Sheevaplug install OpenCV

#apt-cache search opencv

とすると

libcv-dev - development files for libcv
libcv1 - computer vision library
libcvaux-dev - development files for libcvaux
libcvaux1 - computer vision extension library
libhighgui-dev - development files for libhighgui
libhighgui1 - computer vision GUI library
opencv-doc - OpenCV documentation and examples
python-opencv - Python bindings for the computer vision library

opencvに該当するパッケージ一覧が得られる。最新のOpenCVは 2.1 （2010. 5 3現在）だけど、これは1.0かなぁ。
ソースからコンパイルするのは大変だから仕方ないかな。
今回は、python使わないし、ドキュメントもいらないので、opencv-docとpython-opencv以外をインストールする。

#apt-get install libcv-dev libcv1libcvaux-dev libcvaux1 libhighgui-dev libhighgui1

数分間ごちゃごちゃでてきて、終わった。イントールできたっぽい。

http://kuedahome.blog113.fc2.com/blog-entry-11.html

Setting up Eclipse with hardware debugging

For this guide we will assume that you are using the Linux JTAG toolchain for an LM3S based board (Such as Cygni, Eridani, or Procyon.) If you are not using that toolchain you may still apply this contents of this document with some suitable changes.

Eclipse is complex software and this guide is just a starting point, you should customize the environment to suit your needs and wishes.

The purpose of the using Eclipse is to mainly to provide a convenient means of using GDB to debug the target board over JTAG that is well integrated.

This will allow us to inspect register and memory contents of the MCU as we run code and set breakpoints with ease.

http://teholabs.com/docs/toolchain:eclipse

Sheevaplug Booting From SD Card (Best instruction and it works)

The steps are:

1. Find out what name your system calls the raw SD card device
2. Format and partition the SD card
3. Create a filesystem on the SD card
4. Mount the new card
5. Copy over the OS from the NAND Flash
6. Change the uBoot settings to boot from the SD card
7. Save some wear&tear on the SD card

http://www.randomexploits.com/projects/sheevaplug/sd-boot.htm <--- Detail steps

Terminal software - version 1.9b 20110827

http://sites.google.com/site/terminalbpp/

因為是embedded system programmer 對於Terminal program 特別有感覺 這是另一個Terminal program 之前常用的有RealTerm and Tera Term

瘋Linux

(Sheevaplug <--白色的)

不知道為何最近開始瘋Linux 應該是閒到不行了吧 先把家裡我自己用的EEEPC 換個硬碟轉成Ubuntu 11.04 再把公司的Notebook splite 一個Partition 160G 裝上11.10 beta2 然後又拿出 2009年 tryrun的 sheevaplug 花了兩天把他update 並接上Ardunio 真不知道是哪一根筋跩到了

 

 

Lxardoscope is a Linux+Arduino oscilloscope

[Privatier] wrote in to let us know about lxardoscope, his project that lets you use an Arduino as hardware input for a Linux-based oscilloscope display. This implementation offers two channels with about 3000 samples per second from each. He touts some of the GUI options like vertical resolution between 2mV and 10V per division. That part kind of stumps us because we don’t see how a measurement of 10V (or more) can be taken using the schematic included. But you’re comprehension may surpass ours so do take a look yourself.

via Hack a Day

 

 

Creating a Serial to USB driver using the Android USB-Host API

However, behind the scenes you are actually communicating with the device using plain USB Bulk transfers. This job is done by the USB-Serial driver for you (ftdi_sio for instance). If you like to avoid using the kernel driver for some reason you can do this by using a library based on libusb called “libftdi”.

http://android.serverbox.ch/?p=370

這才是方法阿

The microprocessor at 40--The birth of electronics

In November, 1971, 40 years ago, Intel placed an ad in Electronic News introducing the 4004, the first microprocessor. "A micro-programmable computer on a chip!" the headline shouted. At the time in my first year of college, I was fortunate to snag a job as an electronics technician. None of the engineers I worked with believed the hype. Intel's best effort at the time had resulted in the 1103 DRAM, which stored just 1 kilobit of data. The leap to a computer on a chip seemed impossible. And so it turned out, as the 4004 needed a variety of extra components before it could actually do anything. But the 4004 heralded a new day in both computers and electronics.

via EETimes (不錯的Review)

uC/OS-III free pdf and project files

The manual and source code for the uC/OS-III kernel is now available for download. UC/OS-III is what came with the evalbot, and it is a realtime operating system for that and many other chips. The problem with it for most hobby level people is that just the manual was 100$, and unless you already knew something about the system it did not sound very attractive.

via HackADay

想當初還花了快8000NTD 買書跟EVBoard.

Parallax Propeller P8X32A Quick Teardown

Parallax has a really neat 8 core 32 bit CPU called the ‘Propeller’.  It’s been out for a few years but it is gaining popularity.  There is no security with the device as it boots insecurely via a UART or I2C EEPROM.  None the less, we thought it was interesting to see an 8 core CPU decapsulated!

http://www.flylogic.net/blog/?p=148

 

The best free IDEs

 

IDE is

• a text/source code editor
• a compiler or an interpreter (depending on the specific programming language) able to transform the source code in machine code that can be therefore executed
• build automation tools, able to automate the operations usually performed by the user
• a debugger to debug, validate, and verify the correct behavior of the specific application

via EOS -> More Free IDE Simple Review

Modelling chemical reactions using an FPGA

[Bruce Land] is a professor at Cornell University who was looking for a way to quickly solve chemical kinetic systems. He had used MATLAB but longed for a faster method. His upgrade achieves a 100 times speed increase by using an FPGA as a parallel stochastic solver.

via Hack a Day

openPICUS

openPICUS is open source embedded platform for Smart Sensors and Internet of Things. Modules are low cost and highly integrated to let ideas be brought from prototype to the market.

http://www.openpicus.com/cms/

Python Logic Sniffer client

via Dangerous Prototype

Kinect Hackers Are Changing the Future of Robotics – The Real Story Behind the Kinect

For 25 years, the field of robotics has been bedeviled by a fundamental problem: If a robot is to move through the world, it needs to be able to create a map of its environment and understand its place within it. Roboticists have developed tools to accomplish this task, known as simultaneous localization and mapping, or SLAM. But the sensors required to build that map have traditionally been either expensive and bulky or cheap and inaccurate. Laser arrays cost a few thousand dollars and weigh several pounds, and the images they capture are only two-dimensional. Stereo cameras are less expensive, lighter, and can construct 3-D maps, but they require a massive amount of computing power. Until a reasonably priced, easier method could be designed, autonomous robots were trapped in the lab.

via Adafruit

MIT Technology Review

 

Gear: Parallax Propeller emulator/debugger

via Dangerous Prototype

Open bench logic sniffer tutorial

via dangerous prototype

AlienCortex AV multicore softprocessor development platform

http://www.kickstarter.com/projects/794668827/aliencortex-av

Alien Xtreme-R is designed to be the ideal core for robotics enthusiasts.  With four AVR8 Arduino-sketch compatible cores, you can now develop independently running code to interact with sensors, motors, and other I/O devices without contention.