TC_Chu's Point

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.

 

 

ARM Cortex-M3 PSoC® 5 Design Challenge

http://www.cypress.com/?id=3271

CONTESTANT AND COMMUNITY PRIZES

Phase I: Conceptual Design — November 10, 2010 to January 17, 2011

• Most Original Design, US $500 = €358
• One hundred Contestants will receive a PSoC Creator development kit
• Community Ratings - US $50 = €35.8 awarded at random to six (6) community members that have rated at least one valid design through end of Phase III

Phase II: Early Prototype Design — January 17, 2011 to March 28, 2011

• Best Video --, US $300 = €214.8 to three Contestants
• Twelve Finalists-- US $100 = €71.6each
• Community Ratings - US $50 = €35.8 awarded at random to six (6) community members that have rated at least one valid design through end of Phase III

Phase III: Final Prototype Design — March 28, 2011 to May 3, 2011

• Four Winners: US $1000 = €716 each, one winner from the Analog, Digital and Component Categories, and one Community Choice winner
• Grand Prize Winner:  US $2,500 = €1790, awarded to one of the four top Finalists
• Community Ratings - US $50 = €35.8 awarded at random to six (6) community members that have rated at least one valid design through end of Phase III

The approximate retail price of prizes to community members and contestants is more than US $10000 = €7160.27

All prize values converted from US dollars to Euros as of October 25, 2010

 

Program STM32 with the Bus Pirate

via dangerousprototypes

注意文章中的STM32 Discovery board 才10USD.

RT-Thread 0.3.1正式版发布

这个版本支持的硬件平台数量与0.3.0正式版本的一致：
  * ARM Cortex-M3系列：STM32，LM3S以及LPC1766，STM32中新添加STM32F100系列芯片支持。
  * ARM7TDMI系列：LPC2148，LPC2478，AT91SAM7X256，AT91SAM7S
  * ARM920T系列：S3C2440（mini2440）
  * IA32：QEMU及真实的x86机器

修正的问题包括：
  * 修正OS Tick溢出的问题。
  * 修正定时器有时会被延期操作的问题。
  * 修正heap分配器尾部数据浪费的问题。
  * 修正rt_realloc时内存可能被浪费使用的问题。
  * 调整各内核对象结构使得内存布局更合理。

  * 修正ELM FatFs接口中rename的问题。
  * 修正LwIP中IGMP的问题。
  * 完善当发送mail失败时LwIP的处理。
  * 增强、完善RT-Thread/GUI的功能。

via RT_Thread

DSO QUAD (upgrade version DSO Nano)

DSO nano upgrade , looks cool. Detail Speci here

PS3 Move controller teardown (STM32F103VBT6)

via Make 

因為用了STM32 所以Log下來 沒啥重要的 因為我不玩PS3

Cypress PSOC 5 Kit

Cypress PSOC 5 , Cortex-M3 + FPGA + Analog IO + Cap Sensing 蠻好玩的Embedded MCU. 比起Actel SmartFusion FPGA可能比較弱一點 不過其他在IDE和Analog方面 比起Actel要容易入門些 超適合我現在在作的案子 (沒有規格 改東改西)

Leaf Maple (Cortex M3) , Now you can get it from Seeedstudio

The Leaf Maple is a microcontroller board based on the STM32F103RB microprocessor. The Maple runs at a maximum of 72 MHz, has 39 digital input/output pins, 16 analog inputs, native full speed USB, 3 USARTs (hardware serial ports), integrated SPI/I2C support, a power jack, and a reset button. Maple is programmable over USB via our provided DFU bootloader, no extra hardware required! Users can also program the onboard program flash via external JTAG interface. Maple offers security support for read/write protected addresses, as well as User and Handler processor modes. It has a real-time sysTick, useful for a real time OS or any timing senstitive applications. 6 advanced interrupt timers will help you here as well. Maple can be powered via USB, a wall adapter, or it can run off of a rechargeable lipo battery (see below for more info). The Maple is compatible with shields designed for the Arduino Duemilanove or Diecimila.

buy from www.seeedstudio.com

KEIL RVMDK VS IAR EWARM 项目实战比较（谁更有效率？）！！

via blog.ednchina.com -> Check more compare

测试结果及过程：

A.整体编译速度（Built ALL)

在等同配置，即KEIL的时候要求Target 设置的Ouput项：

选上：Debug Information + Create HEX File + Browse Information

其他保持默认（要选中C的LIST项）。

同样在IAR环境下，需要尽量配置成等同的配置，其他需要全部选中LIST项。

二者，在Rebuilt All 的时候：

KEIL RVMDK的表现：

编译的完成的速度约为17s（目测速度）

IAR EWARM的变现：

编译完成的速度约为12s（目测速度）

结论：

IAR EWARM的编译速度要比KEIL RVMDK快！

via blog.ednchina.com -> Check more compare

新朋友 STM32F103 (7)

LCD版子也回來了 星期一銷售經理來問說 星期二可不可以Demo 我說如果LCD沒問題就中午前應該沒問題 很不幸的一開始LCD就出問題 上下顛倒了 不可能改硬體只好改軟體 中午前是改好了可惜因為不知道啥原因 LCD Refresh速度很慢影響到Motor Control的Interrupt . 搞了一個下午還是沒搞定 我說嘛 "LCD沒問題就應該沒問題" 結果就出問題啦 (因為寫軟體時 我的LCD不是用的現在用的 LCD Module 雖說是Compatible不過看起來不是這樣 加上我的LCD是2.5 pitch 新的是 2.0 pitch 不容易交換測) 問題應該是1.LCD Initial Data Sequence 2.STM32 FSMC設定問題

PS.Problem Solved, FSMC設定問題!

STM32 Library for Eagle

via TKJ Electronics

stm32.lbr – ST Cortex-M3 STM32F101/103 processor family in LQFP100, 64, 48 and VFQPFN36
stm32_lqfp144.lbr – STM32F101Zx and STM32F103Zx. LQFP 144 package.

via TKJ Electronics

新朋友 STM32F103 (6)

PC ->STM32 through USB-HID PC Side's program test OK.

新朋友 STM32F103 (5)

利用Arduino 模擬另一顆Co-Processor (ABS Measure,RFID,Temperature Control)

PCB洗回來了 下星期就可以上正式版子測試了

新朋友 STM32F103 (4)

哈哈哈 把USB-HID Driver 搬上去了 不過對於USB-HID的一堆Descriptor還在研究中 !  雖然點複雜不過也看出一點相關 接下來就要看看USB的規格上專有名詞的說明了

新朋友 STM32F103 (3)

3 Uart Ready

Stepping Motor Control with Ramp Ready

Process State Machine Structure Ready

DSP libraries for Cortex M3 and other ARM processors

Four groups of functions:

• Windowing function
• Fast Fourier Transform
• Complex magnitude (absolute value of complex frequency)
• Miscellaneous functions: logarithm(x), exp(x), pseudorandom generator

Three library versions

• GCC ( Rowley CrossWorks, Raisonance, …)
• Keil MDK-ARM
• IAR Embedded Workbench

Windowing functions (e.g. Hamming window)

• Windowing is very common step before FFT calculation
• Perform speed optimized windowing of input signal before FFT
• 16 to 32 bit version performs proper scaling of 16 bit signal for 32 bit FFT

 
FFT functions

• Complex and real FFT, 16 and 32bit FFT versions
• Radix4/2 FFT – sizes 4,8,16,32,64,128,256,512,1024,2048 and 4096
• Inverse FFT available
• Real FFT enables much more efficient processing of the real signals
• 16 bit FFT precision comparable with other fixed point implementation – precision determined by necessary scaling by 0.5 in every FFT stage
• 32 bit FFT increases dynamic range by 90 dB , needs extra 20% to 50% cycles
• Coefficients located in Flash. RAM location means faster FFT for higher latencies.
   

Magnitude functions

• Calculate complex frequency magnitude mag=sqrt (re^2 + im^2)
• Based on custom 32 bit square root algorithm (7/13 cycles)
• Multiple versions of different speed / precision  tradeoffs for 64 bit sqrt

  Logarithm and exponent functions

• Calculate log2(x) and exp2(x) = 2^x
• log2 input, exp2 output:   16q16 unsigned   1/65536 to 65535+65535/65536 
• log2 output, exp2 input :    5q27 signed       -15.99999 to 15.99999
• speed: 11/10 cycles ;  precision 0.4 ppm / 3 ppm   for log2 / exp2
• single multiply conversion to  log10(x), ln(x), 10^x, e^x and generic base log, exp

http://www.embeddedsignals.com/ARM.htm

新朋友 STM32F103 (2)

RTC Time display OK

Main Menu OK

Date-Time Setup OK

Keyboard Event OK

Motor PWM and Step Count Control OK

Sensor Interrupt Test OK

哇我真是太強啦

LeftLabs' Maple Leaf in store now!

LeaftLabs Store

新朋友 STM32F103

這星期開始玩起STM32F103XX MCU 因為有個插花的Peoject需要用 目前把RT-Thread Port上並加上LCD 與 USB Virtual COM Port