Using a MK70FN1M0VMJ15 processor with MII and ADC2_SE16 enabled. Also using Codewarrior 10.6 and MQX4.022. Anytime I initialize the ADC2_SE16 the webserver stops working. I have delayed the initialization of the ADC2_SE16 and found that webserver works fine till initialization. I have also noticed that when the ADC2_SE16 is initialized first the webserver never gets link active. My question is that even though these are different ports and no pin is shared could the possibly be affecting each other? Hi Lee: I have been looking for information related to this problem but at this moment I have not find anything, In this case I would like to know if you are using a development board from Freescale or if you are using a custom board? Have a nice day, Perla Moncada ----------------------------------------------------------------------------------------------------------------------- Note: If this post answers your question, please click the Correct Answer button. Thank you! ----------------------------------------------------------------------------------------------------------------------- It is a custom board, with MII setup instead of RMII. I am concerned that it may be a chip issue, and have no real way to test that possibility with the Development board. This document was generated from the following discussion: 

  180°-Ansteuerung des BLDC-Motors simulation in LTSpice: Verläufe:           Es wurde als x-Koordinaten –Winkel in [°] statt der Zeit überzeichnet    

This document shows the implementation of the infrared on the UART0 using the FRDM-KE02Z platform. The FRDM-KE02Z platform is a developing platform for rapid prototyping. The board has a MKE02Z64VQH2 MCU a Kinetis E series MCU which is the first 5-Volt MCU built on the ARM Cortex-M0+ core. You can check the evaluation board in the Freescale’s webpage (FRDM-KE02Z: Kinetis E Series Freedom Development Platform) The Freedom Board has a lot of great features and one of this is an IrDA transmitter and receiver on it. Check this out! One of the features of the MCU is that the UART0 module can implement Infrared functions just following some tricks (MCU-magic tricks). According to the Reference Manual (Document Number: MKE02Z64M20SF0RM) this tricks are:      UART0_TX modulation: UART0_TX output can be modulated by FTM0 channel 0 PWM output      UART0_RX Tag: UART0_RX input can be tagged to FTM0 channel 1 or filtered by ACMP0 module For this example we are going to use the ACMP0 module to implement the UART0_RX functionality. Note1: The Core is configured to run at the maximum frequency: 20 Mhz Note2: Refer to the reference manual document for more information about the registers. Configuring the FTM0. The next lines show the configuration of the FTM0; the module is configured with a Frequency of 38 KHz which is the ideal frequency for an infrared led. The FTM0_CH0 is in Edge_Aligned PWM mode (EPWM).           #define IR_FREQUENCY       38000 //hz      #define FTM0_CLOCK                BUS_CLK_HZ      #define FTM0_MOD_VALUE            FTM0_CLOCK/IR_FREQUENCY      #define FTM0_C0V_VALUE            FTM0_MOD_VALUE/2      void FTM0CH0_Init( void )      {        SIM_SCGC |= SIM_SCGC_FTM0_MASK;             // Init FTM0 to PWM output,frequency is 38khz        FTM0_MOD= FTM0_MOD_VALUE;        FTM0_C0SC = 0x28;        FTM0_C0V = FTM0_C0V_VALUE;        FTM0_SC = 0x08; // bus clock divide by 2      } With this we accomplish the UART0_TX modulation through a PWM on the FTM0_CH0. Configuring the ACMP0. The configuration of the ACMP0 is using a DAC and allowing the ACMP0 can be driven by an analog input.      void ACMP_Init ( void )      {        SIM_SCGC |= SIM_SCGC_ACMP0_MASK;        ACMP0_C1 |= ACMP_C1_DACEN_MASK |                   ACMP_C1_DACREF_MASK|                   ACMP_C1_DACVAL(21);    // enable DAC        ACMP0_C0 |= ACMP_C0_ACPSEL(0x03)|                            ACMP_C0_ACNSEL(0x01);        ACMP0_C2 |= ACMP_C2_ACIPE(0x02);  // enable ACMP1 connect to PIN        ACMP0_CS |= ACMP_CS_ACE_MASK;     // enable ACMP                } With this we have now implemented the UART0_RX.     IrDA initialization. Now the important thing is to initialize the UART0 to work together with these tricks and implement the irDA functions. Basically we initialize the UART0 like when we use normal serial communication (this is not the topic of this post, refer to the project to see the UART_init function) and we write to the most important registers:         SIM_SOPT |= SIM_SOPT_RXDFE_MASK; UART0_RX input signal is filtered by ACMP, then injected to UART0.      SIM_SOPT |= SIM_SOPT_TXDME_MASK; UART0_TX output is modulated by FTM0 channel 0 before mapped to pinout. The configuration is as follows:      void IrDA_Init( void )      { // initialize UART0, 2400 baudrate        UART_init(UART0_BASE_PTR,BUS_CLK_HZ/1000,2400);                  // clear RDRF flag        UART0_S1 |= UART_S1_RDRF_MASK;                  // initialize FTM0CH1 as 38k PWM output        FTM0CH0_Init();                      // enable ACMP        ACMP_Init(); SIM_SOPT |= SIM_SOPT_RXDFE_MASK;  //UART0_RX input signal is filtered by ACMP, then injected to UART0.        UART0_S2 &= ~UART_S2_RXINV_MASK;  //inverse data input SIM_SOPT |= SIM_SOPT_TXDME_MASK;  //UART0_TX output is modulated by FTM0 channel 0 before mapped to pinout.      } With the irDA initialization we got the infrared features on the UART0. Philosophy of the Example In the attachments of this post you can find the example which shows the use of these functions in a basic application; the project was compiled in CodeWarrior 10.6 and the philosophy is: I hope that the information presented on this document could be useful for you. Thank you! Best Regards!

Printer extruders and recyclers use Motors that benefit from torque control that can be obtained by using Kinetis V, a BLDC motor  and the Freescale Motor control algorithms. A plastic waste extruder for RepRap 3D printer filament.  Image: RepRapWiki See this link for more details: How recycled plastic for 3D printing will drive sustainability and improve social consciousness - TechRepublic "Durable, shiny, new plastic -- it's what makes most 3D printers run. And as 3D printing grows in popularity and we begin to scale projects in every industry, the world is going to use a lot more of it. If the industry goal is to have 3D printers in most homes and businesses with lots of other 3D printers running constantly in manufacturing centers, we'll naturally add even more to the 33.6 million tons of plastic Americans toss each year, only 6.5% of which is recycled. It's estimated that 100 million tons of plastic is floating in the world's oceans. Each piece can take anywhere from 500 to 1,000 years to decompose."

Fat File System for SD card using SPI for Kinetis-K60, K22 and K20

As K2 – The Next Generation of Kinetis Solutions continues to build momentum around new applications within the Internet of Things (IoT), the ARM® mbed™-enabled Freescale Freedom development platform, FRDM-K64F, is taking center stage. With the FRDM-K64F platform now in the hands of thousands of engineers across the globe, we already are learning about how this platform is powering new and inventive applications. To help illustrate this powerful and fun-sized platform, coming every Monday (beginning on Monday, May 19) for five consecutive Mondays, we invite you to join us for MountainMondays and scale K2 where we'll be giving away 20 FRDM-K64F development platforms each week - that's 100 in all! Join us to begin the ascent on Monday, May 19, by following Freescale's Facebook, Twitter and Google+ pages to find out what you have to do to win one of these development platforms! For complete contest rules, click here. Thanks to everyone who have participated in #MountainMondays! Great ideas from everyone! Below is our list of winners thus far for each week. If your name is on any of the following lists, be sure to email your shipping address to socialmedia@freescale.com and continue the ascent with us each Monday through June 16! Week 1 - May 19, 2014: Basecamp FRDM And the winners for week 1 are ... On Facebook ... Ahmed Felhi Naga Kishanmv Raleigh Sea Illgen Austin Chen Rahul Karnik Derrick Beaven David Pereira Anhell Barragán Valentín Korenblit Олег Лаврухин Hector Fabian Joanna Kurki Jozef Humaj Wojtek Stoduly Google+ ... Gurinder Singh Gill Mark McDonnell Niklas Stoyke Twitter ... kumisaappaat cledic evemuller92 Week 2 - May 26, 2014: Basecamp K And the winners for week 2 are ... From Facebook … Gaurav Chaudhary Bhuvanesh Nick Pyrosster Pyrosster Federico Lo Grasso Florencia Caruso Nick Defensor Laura Mándola SuperKing Tříska  From Twitter … Antonio Quevedo Jayprakash Shet Fahad Mirza Jonathan Chadwick Gordon Margulieux Hector Fabian C Zahir Parkar Attila Kozmári From Google+… Sergey Gridnewskiy Paul Nykiel Matías Dell'Oso Manishi Barosee Week 3 - June 2, 2014: Basecamp 6 And the winners for week 3 are ... From Facebook … Robert Bui Trong Nguyen Alexandre Ferri Michal Wertheim Petr Vítek Gerald Fry Jr Leśniewicz Wojciech Adriana Errico Trong Nguyen Emnics Erwin Kuhn Maliganis Nikolaos Dushyant Arora Štefan Knotek Hom Flann James Braga From Twitter… Gaurav Singh From Google+ … Soputtra San Clovis Fritzen Cristina Pérez Week 4 - June 9, 2014: Basecamp 4 And the winners for week 4 are ... From Facebook … Ivan Ruiz Robin Wohlers-Reichel Tony Anderson Łukasz Bittner Laura Chijlis Earl Orlando Jaime Pérez Rak San Gabriel Korenblit Tobiasz Dworak Sean Emerald Ghulam Mirosław Szymczyk Bhaumik Bhatt Jenius Nghia From Google+ … prithvi ganesh Evangelia Karagianni Vandy San Greg Steiert Titvirak San Joji John Varghese Week 5 - June 16, 2014: Basecamp F And the winners for week 5 are ... Evangelia Karagianni Shady Trần Kasia Michalowska Nghia Nguyen Saudin Dizdarevic Navin Bhaskar Thank you to everyone who has participated in the past five weeks of #MountainMondays – we’ve finally reached the summit of K2! Your energy, inventiveness and contributions have all been fantastic! Congratulations to all winners! We hope you enjoy your development platform and look forward to hearing about what you build using the FRDM-K64F platform. Happy designing!

Man powers his home from local stream with DIY micro-hydro plant - StumbleUpon The above project is amazing. Imagine a Kinetis V as the inverter for a micro-turbine based on a PMSM or BLDC ??

To do: Same as exercise 5 but now with interrupts.   In this exercise, you realize a windscreen wiper with the Tower. The LEDs simulate the moving wiper by running from left to right and back again. The user interface is simple: With pushbutton1, the time delay interval is increased in steps of 1 second starting from 5 seconds delay down to 1 second and further to continuous wiping. With pushbutton2 the delay is decreased in the same way. If the delay is decreased, the wiper should start immediately, because right now there is a need for wiping. This is not true for increasing the delay. In this case, wait till the current delay time is over, set the new delay. In technical terms: Use asynchronous interval reset for decrease and synchronous reset for increase.   Use the timer and the port interrupts for the pushbuttons in this Kinetis exercise.   Result: TWR_K60_wiper_int.zip Original Attachment has been moved to: TWR_K60_wiper_int.zip

To do: In this exercise, you realize a windscreen wiper with the Tower. The LEDs simulate the moving wiper by running from left to right and back again. The user interface is simple: With pushbutton1, the time delay interval is increased in steps of 1 second starting from 5 seconds delay down to 1 second and further to continuous wiping. With pushbutton2 the delay is decreased in the same way. If the delay is decreased, the wiper should start immediately, because right now there is a need for wiping. This is not true for increasing the delay. In this case, wait till the current delay time is over, set the new delay. In technical terms: Use asynchronous interval reset for decrease and synchronous reset for increase. Use active wait loops instead of the timer in this Kinetis exercise. Hint: Have you already switched a case? Result: TWR_K60_wiper_poll.zip

To do: The development platform is Eclipse. The EVAL Board is the Kinetis Tower TWR K60. On the Tower, you find 2 pushbuttons and 4 LEDs. a) Generate a hexadecimal random number from 0x0 to 0xF as long as pushbutton1 is pressed. Display the result with the 4 LEDs for about 3 seconds. b) Replace the code for recognizing a pressed key by a macro "KEY1_PRESSED". c) Replace the access to the 4 LEDs by a macro "LEDx_TOGGLE" with x = 0...3". Use active wait loops instead of the timer in this Kinetis exercise. Result: TWR_K60_RANDOM.zip

OpenSDA/OpenSDAv2 is a serial and debug adapter that is built into several Freescale evaluation boards. It provides a bridge between your computer (or other USB host) and the embedded target processor, which can be used for debugging, flash programming, and serial communication, all over a simple USB cable.   The OpenSDA hardware consists of a circuit featuring a Freescale Kinetis K20 microcontroller (MCU) with an integrated USB controller. On the software side, it implements a mass storage device bootloader which offers a quick and easy way to load OpenSDA applications such as flash programmers, run-control debug interfaces, serial to USB converters, and more. Details on OpenSDA can be found in the OpenSDA User Guide.     The bootloader and app firmware that lay on top of the original OpenSDA circuit was proprietary.  But recently ARM decided to open source their CMSIS-DAP interface, and now a truly open debug platform could be created. This new open-sourced firmware solution is known as OpenSDAv2.   OpenSDAv2: OpenSDAv2 uses the exact same hardware circuit as the original OpenSDA solution, and out of the box it still provides a debugger, drag-and-drop flash programmer, and virtual serial port over a single USB cable.   The difference is the firmware implementation: OpenSDA: Programmed with the proprietary P&E Micro developed bootloader. P&E Micro is the default debug interface app. OpenSDAv2: Programmed with the open-sourced CMSIS-DAP/mbed bootloader. CMSIS-DAP is the default debug interface app.       Firmware Developer Kinetis K20 Based Hardware Circuit Default Debug Interface Drag-and-drop Target MCU Flash Programming Virtual Serial Port Source Code Available OpenSDA P&E Micro x P&E Micro .srec/.s19 x   OpenSDAv2 ARM/mbed.org x CMSIS-DAP .bin x x   The bootloader and app firmware used by OpenSDAv2 is developed by the community at mbed.org, and is known as “CMSIS-DAP Interface Firmware”. If you explore that site, you will find that this firmware was also ported to run on other hardware, but the combination of this mbed.org firmware with the Kinetis K20 MCU is known as OpenSDAv2.   It is important to understand however that it is possible to run a P&E Micro debug app on the CMSIS-DAP/mbed bootloader found on OpenSDAv2. Likewise it is possible to run a CMSIS-DAP debug app on the P&E Micro bootloader found on OpenSDA. The debug application used needs to be targeted towards a specific bootloader though, as a single binary cannot be used on both the OpenSDA and OpenSDAv2 bootloaders.   OpenSDAv2.1: During development of OpenSDAv2 features and bug fixes, it was found that the reserved bootloader space was too small. Thus a new version of OpenSDAv2 had to be created, which was named OpenSDAv2.1. The difference between the OpenSDAv2.0 and v2.1 is the address where the debug application starts: for OpenSDAv2.0 it expects the application at address 0x5000, while OpenSDAv2.1 expects the application to start at address 0x8000.   The only board with OpenSDAv2.0 is the FRDM-K64F. All other OpenSDAv2 boards (such as the just released FRDM-K22F) use OpenSDAv2.1.   Unfortunately this means that new OpenSDAv2 apps are needed. From a user perspective this mostly affects the JLink app since it was shared across all boards. Make sure you download the correct app for your board based on the OpenSDAv2 version.   OpenSDAv2 Apps: mbed CMSIS-DAP for FRDM-K64F mbed CMSIS-DAP for FRDM-K22F P&E Micro  (use the Firmware Apps link) Segger JLink (look at bottom of page for OpenSDAv2.0 or OpenSDAv2.1 app)   OpenSDAv2 Bootloader: The key difference between OpenSDA and OpenSDAv2 is the bootloader. Boards with OpenSDA use a proprietary bootloader developed by P&E Micro, and it cannot be erased or reprogrammed by an external debugger due to the security restrictions in the firmware. Boards with OpenSDAv2 use the open-source bootloader developed by mbed.org, and it can be erased and reprogrammed with an external debugger.   Apps need to be specifically created to work with either the P&E bootloader (Original OpenSDA) or the CMSIS-DAP/mbed bootloader (OpenSDAv2/OpenSDAv2.1) as the bootloader memory map is different.  Thus it’s important to know which type of bootloader is on your board to determine which version of an app to load.   You can determine the bootloader version by holding the reset button while plugging in a USB cable into the OpenSDA USB port. A BOOTLOADER drive will appear for both OpenSDA and OpenSDAv2.   The OpenSDAv2.0 bootloader (may also be called the CMSIS-DAP/mbed bootloader) developed by mbed.org will have the following files inside.  Viewing the HTML source of the bootload.htm file with Notepad will tell you the build version, date, and git hash commit. For the OpenSDAv2.1 bootloader, this file will be named mbed.htm instead.     The OpenSDAv1 bootloader developed by P&E Micro will have the following inside. Clicking on SDA_INFO.HTM will take you to the P&E website.       Using CMSIS-DAP: When you connect a Freedom board that has OpenSDAv2 (such as the FRDM-K64F) to your computer with a USB cable, it will begin running the default CMSIS_DAP/mbed application which has three main features.   1. Drag and Drop MSD Flash Programming You will see a new disk drive appear labeled “MBED”.   You can then drag-and-drop binary (.bin) files onto the virtual hard disk to program the internal flash of the target MCU.   2.Virtual Serial Port OpenSDAv2 will also enumerate as a virtual serial port, which you can use a terminal program , such as TeraTerm (shown below), to connect to. You may need to install the mbed Windows serial port driver first before the serial port will enumerate on Windows properly. It should work without a driver for MacOS and Linux.   3. Debugging The CMSIS-DAP app also allows you to debug the target MCU via the CMSIS-DAP interface. Select the CMSIS-DAP interface in your IDE of choice, and inside the CMSIS-DAP options select the Single Wire Debug (SWD) option:   Kinetis Design Studio (KDS): Note: OpenOCD with CMSIS-DAP for FRDM-K22F is not supported in KDS V1.1.0. You must use either the P&E app instructions or the JLink app instructions to use KDS with the FRDM-K22F at this time. This will be fixed over the next few weeks. OpenSDAv2 uses the OpenOCD debug interface which uses the CMSIS-DAP protocol. Make sure '-f kinetis.cfg' is specified as 'Other Options':   IAR     Keil:         Resources CMSIS-DAP Interface Firmware mbed.org FRDM-K64 Page FRDM-K64 User Guide OpenSDAv2 on MCU on Eclipse blog OpenSDA User Guide KDS Debugging   Appendix A: Building the CMSIS-DAP Debug Application The open source CMSIS-DAP Interface Firmware app is the default app used on boards with OpenSDAv2. It provides: Debugging via the CMSIS-DAP interface Drag-and-drop flash programming Virtual Serial Port providing USB-to-Serial convertor   While binaries of this app are provided for supported boards, some developers would like to build the CMSIS-DAP debug application themselves.   This debug application can be built for either the OpenSDAv2/mbed bootloader, or for the original OpenSDA bootloader developed by P&E Micro. If you are not sure which bootloader your board has, refer to the bootloader section in this document.   Building the CMSIS-DAP debug application requires Keil MDK. You will also need to have the “Legacy Support for Cortex-M Devices” software pack installed for Keil.   You will also need Python 2.x installed. Due to the python script used, Python 3.x will not work.   The code is found in the MBED git repository, so it can be downloaded using a git clone command: “git clone https://github.com/mbedmicro/CMSIS-DAP.git” Note that there is a Download Zip option, but you will run into a issue when trying to compile that version, so you must download it via git instead.   The source code can be seen below:   This repository contains the files for both the bootloader and the CMSIS-DAP debug interface application. We will concentrate on the interface application at the moment.   Open up Keil MDK, and open up the project file located at \CMSIS-DAP\interface\mdk\k20dx128\k20dx128_interface.uvproj In the project configuration drop-down box, you will notice there are a lot of options. Since different chips may have slightly different flash programming algorithms, there is a target for each specific evaluation board. In this case, we will be building for the FRDM-K64F board. Scroll down until you get to that selection:   Notice there are three options for the K64: k20dx128_k64f_if: Used for debugging the CMSIS-DAP application with Keil. Code starts at address 0x0000_0000 k20dx128_k64_if_openSDA_bootloader: Creates a binary to drag-and-drop on the P&E developed bootloader (Original OpenSDA) k20dx128_k64_if_mbed_bootloader: Creates a binary to drag-and-drop onto the CMSIS-DAP/mbed developed bootloader (OpenSDAv2)   Since the FRDM-K64F comes with the OpenSDAv2 bootloader, we will use the 3 rd option. If we were building the mbed app for another Freedom board which had the original OpenSDA bootloader, we would choose the 2 nd option instead.   Now click on the compile icon. You may get some errors If you get an error similar to the one shown below, make sure you have installed the Legacy pack for ARM as previously described earlier:           compiling RTX_Config.c...             ..\..\Common\src\RTX_Config.c(184): error:  #5: cannot open source input file "RTX_lib.c": No such file or directory            and           compiling usb_config.c...             ..\..\..\shared\USBStack\INC\usb_lib.c(18): error:  #5: cannot open source input file "..\..\RL\USB\INC\usb.h": No such file or directory   If you get an error regarding a missing version_git.h file, make sure that Python 2.x and git are in your path. A Python build script fetches that file. It's called from the User tab in the project options, under "Run User Programs Before Build/Rebuild". If there is a warning about “invalid syntax” when running the Python script, make sure your using Python 2.x. Python 3.x will not work with the build script.   Now recompile again, and it should successfully compile. If you look now in \CMSIS-DAP\interface\mdk\k20dx128 you will see a new k20dx128_k64f_if_mbed.bin file   If you compiled the project for the OpenSDA bootloader, there would be a new k20dx128_k64f_if_openSDA.S19 file instead.   Loading the CMSIS-DAP Debug Application: Now take the Freedom board, press and hold the reset button as you plug in the USB cable. Then, drag-and-drop the .bin file (for OpenSDAv2) or .S19 file (for OpenSDA) into the BOOTLOADER drive that enumerated.   Perform a power cycle, and you should see a drive called “MBED” come up and you can start using the CMSIS-DAP debug interface, as well as drag-and-drop programming and virtual serial port as described earlier in this document.   Appendix B: Building the CMSIS-DAP Bootloader All Freedom boards already come with a bootloader pre-flashed onto the K20.  But for those building their own boards that would like to use CMSIS-DAP, or those who would like to tinker with the bootloader, it possible to flash it to the Kinetis K20 device. Flashing the bootloader will require an external debugger, such as the Keil ULink programmer or Segger JLink.   Also note that the OpenSDA/PE Micro Bootloader cannot be erased! Due to the proprietary nature of the P&E firmware used by the original OpenSDA, it can only be programmed at the board manufacturer and JTAG is disabled. So these instructions are applicable for boards with OpenSDAv2 only.   First, open up the bootloader project which is located at \CMSIS-DAP\bootloader\mdk\k20dx128\k20dx128_bootloader.uvproj   There is only one target available because all OpenSDAv2 boards will use the same bootloader firmware as the hardware circuitry is the same.   Click on the compile icon and it should compile successfully. If you see errors about a missing version_git.h file, note that Python 2.x must be in the path to run a pre-build script which fetches that file.   Now connect a Keil ULink to J10 and then insert a USB cable to provide power to J26. Note that if you have the 20-pin connector, you’ll want to use the first 10 pins.   Then for Keil 5 you will need to change some debug options (CMSIS-DAP is built under Keil 4.x).   Right click on the bootloader project, and go to the Debug tab and next to ULINK Pro Cortex Debugger, click on Settings:   Then under “Cortex-M Target Driver Setup”, change the “Connect” drop down box to “under Reset” and “Reset” dropdown box to “HW RESET”. Hit OK to save the settings.     Then in Keil, click on Flash->Erase.   And then on Flash->Download.   If you get an “Invalid ROM Table” error when flashing the CMSIS-DAP bootloader, make sure you made the changes to the debugger settings listed above.   After some text scrolls by, you should see:   Now power cycle while holding down the reset button, and you should see the bootloader drive come up. You’ll then need to drag and drop the mbed application built earlier onto it. And that’s all there is to it!   The binaries for the bootloader and CMSIS-DAP debug app for the FRDM-K64F board created in writing this guide are attached. Original Attachment has been moved to: k20dx128_bootloader.axf.zip Original Attachment has been moved to: k20dx128_k64f_mbed.bin.zip

This is a Processor Expert project created by CodeWarrior for MCUs v10.6 which implements the charge-discharge time of a RC circuit for measuring capacitance. The charge-discharge sequence is performed by TPM0 operating in PWM mode, while the time is measured by TPM1 operating in Input Capture mode. A 100K ohm series resistor is being used, and the result is expressed on nF. It is also using the LCDHTA component from Erich Styger for showing the measurements on a 16x2 LCD, connected to the FRDM-KL05Z through a proto shield. The project is attached, and the pictures shows the measurements of three different capacitors: 10nF, 47nF and 1uF.

Description Thing.... Internet Enabled..... with command line and GUI over a TCP connection Parts Fantasma Toys Hand Runner: http://www.newegg.com/Product/Product.aspx?Item=9SIA0190BB9057 FRDM-K64 : http://mbed.org/platforms/FRDM-K64F/ RN-XV: https://www.sparkfun.com/products/10822 FRDM-AUTO: https://community.freescale.com/docs/DOC-99621 GUI Code:  https://github.com/ehughes/InternetofThing MBED Code: http://mbed.org/users/emh203/code/InternetOfThing/wiki/internet_of_thing Action Shots

客户要求：K60 100MHz芯片作为SPI主机读取片外SPI Flash存储器内容（SPI Flash器件数据准备完成会触发K60 GPIO中断），要求在130~150微秒之间读取九个不连续地址上的数据，每个地址需要读取4个字节，SPI波特率为5MHz。读取SPI Flash存储器，需要使用读取命令（1个字节）外加地址（2个字节）。换言之，每读取一次K60需要发送7个字节（1字节读取命令+2字节地址+4字节空读数据）。同时要求减少内核负担。 Customer requirement: Use K60 100MHz product as SPI master communicate with external SPI Flash device (When data ready, SPI Flash device will trigger K60 GPIO interrupt), it need to read data from 9 discontinuous address, each address read 4 bytes within 130~150us. SPI  baud rate is 5MHz. Read data from SPI Flash, it need SPI master send 1byte read command and 2bytes address. In another word, K60 need to send 7bytes(1byte read command+2bytes address+4bytes dummy read) 9times within 130us. SPI communication baud rate is 5MHz. It also require to reduce core work load. 实现方法：使用DMA模块，其中一个DMA通道1用来装载SPI传输TX数据（触发源为SPI TFFF符号，SPI FIFO可装载），另外一个DMA通道0用来接收SPI数据（触发源为SPI RFDF符号，SPI 接收FIFO非空）。通过使用DMA引擎可以自动发起SPI传输，减少内核在SPI传输过程中的干预，达到降低内核工作负荷的效果。SPI模块采用中断方式。 Reality way: Use DMA module, DMA CH0 loads data for SPI transmit, DMA CH1 stores data for SPI receive.  DMA triggered by SPI module and SPI module works in interrupt way. 测试平台：TWR-K60D100M， TWR-MEM， IAR ARM Workbench V6.60 TWR-MEM板子提供SPI Flash设备（AT26DF081A），可以通过TWR-K60D100M SPI2模块进行访问。 Test platform: TWR-K60D100M ，TWR-MEM ， IAR ARM Workbench V6.60 SPI Flash AT26DF081A on TWR-MEM board, which could be accessed by TWR-K60D100M via SPI2 module. 测试场景一：读取AT26DF081A设备ID信息 Test scenario 1:  Read device ID AT26DF081A设备提供查询设备ID命令0x9F，返回4个字节设备ID信息（0x1F,0x45,0x01,0x00）。K60作为SPI主机发出查询命令，之后执行4次空写入操作用来读出设备ID信息。测试中SPI传输/接收数据帧大小设定为1个字节（8bit）。由于DSPI模块传输接收均提供4级FIFO，测试中使用两种方式进行SPI数据发送，一种方式使用DMA通道发送读取设备ID查询命令和4次空写入数据，另一种方式通过执行代码（需要内核干预）发送读取设备ID查询命令和4次空写入数据。SPI数据接收均使用DMA完成。为了便于测试使用DMA模块是否降低内核负荷，在DSPI通信同时，主程序在While循环中不停翻转GPIO引脚（PTD7）。 SPI Flash AT26DF081A provides read device ID command(0x9f), will feedback 4 bytes device ID info（0x1F,0x45,0x01,0x00）。K60 works as SPI master send read ID command, then send 4 dummy write data to read back device ID info. During test, SPI data frame size setting to 1byte(8 bit). For DSPI module TX/RX FIFO is 4 entries, so there using two ways do SPI data transfer, one is using DMA CH1 send data, the other way using software code send data. SPI RX using DMA CH0 and in main while loop it will toggle PTD7 pin to show if using DMA module will reduce core work load. 测试流程图（方法一: 使用DMA CH1发送SPI数据）： Test flow chart (Way1: Using DMA CH1 do SPI TX)： 测试结果（Test Result）： 执行一次读ID信息操作，需要花费12.96us，其中内核处理中断的时间为（2.56+2.72）= 5.28us。 根据客户要求，依照此方法每次发送3个字节，接收4个字节，SPI通信过程中内核负荷时间比率为 (5.28/16.16) =32.7% SPI read ID operation once, it will take 12.96us, includes core deal with interrupt time 5.28us. According to this way, customer want to TX 3bytes then RX 4bytes, during SPI communication core work load rate is 32.7% 测试流程图（方法二: 使用软件代码发送SPI数据）： Test flow chart (Way2: Using software code do SPI TX): 测试结果（Test Result）： 执行一次读ID信息操作，需要花费11.6us，其中内核处理中断的时间为（2.48+1.40）= 3.88us。 根据客户要求，依照此方法每次发送3个字节，接收4个字节，SPI通信过程中内核负荷时间比率为 (3.88/14.80) =26.2% SPI read ID operation once, it will take 11.6us, includes core deal with interrupt time 3.88us. According to this way, customer want to TX 3bytes then RX 4bytes, during SPI communication core work load rate is 26.2% 测试场景二：读取AT26DF081A设备9处不连续地址数据 Test scenario 2: Read 9 discontinue address data from AT26DF081A AT26DF081A设备提供读阵列命令（0x0B），可以连续读取多个字节数据。根据客户要求，测试读取9处不连续地址数据，每处读取4个字节。根据AT26DF081A设备要求，读阵列命令后需要再发送3个字节地址信息外加1个字节空写入数据，之后K60将会收到数据。即如果要读取4个字节数据，K60作为SPI主机需要发送9个字节数据（1个字节读阵列命令+3个字节地址+1个字节空写入+4个字节空写入）。测试中使用两个DMA通道进行SPI数据收发，两个DMA通道交替工作，DMA通道0（SPI接收）优先级高于DMA通道1（SPI发送）。完成9处数据采集后进入SPI中断，清除EOQ标志并且修正DMA通道配置，进行新的一轮9处数据读取测试。为了便于测试使用DMA模块是否降低内核负荷，在DSPI通信同时，主程序在While循环中不停翻转GPIO引脚（PTD7）。 SPI Flash AT26DF081A provides read array command (0x0B) to sequentially read a continuous stream of data out. With customer requirement, the test will read 9 discontinue address data, each address read 4 bytes data. AT26DF081A datasheet shows read array command with 3 bytes address and 1 dummy byte, then following will be data. In order to read 4 bytes data out, K60 as SPI master need TX 9 bytes data (1byte read array command + 3bytes address + 1byte dummy data + 4bytes dummy data). During the test, it using two DMA channels do SPI TX/RX, each channel alternatively work, DMA CH0（SPI RX） with higher priority than DMA CH1(SPI TX). When finish 9 discontinue address data receive, it will clear EOQ flag and refresh DMA CH0/1 setting in SPI interrupt for next round read 9 discontinue address data test. In main while loop it will toggle PTD7 pin to show if using DMA module will reduce core work load. 测试流程图(Test flow chart)： 测试结果（Test Result）: 读取AT26DF081A设备9处不连续地址数据，需要花费132.32us，其中内核处理中断的时间为2.6us。 根据客户要求，依照此方法每次发送3个字节，接收4个字节，重复9次。SPI通信过程中内核负荷时间比率为 (2.6/103.52) =2.5% SPI read ID operation once, it will take  132.32us , includes core deal with interrupt time 2.6us. According to this way, customer want to TX 3bytes then RX 4bytes, 9times，during SPI communication core work load rate is 2.5% DMA模块提供动态加载DMA传输控制描述符（TCD）功能，当需要连续多次执行SPI传输时，使用这种功能可以进一步减少内核负荷。 DMA module provides dynamic scatter/gather feature, which supports automatically loading a new TCD into a DMA channel. Using this feature will reduce core work load in SPI transfer continuously. 测试结果(使用DMA动态加载功能)： Test Result(Using DMA dynamic scatter/gather feature )： 读取AT26DF081A设备9处不连续地址数据，需要花费130.68us，其中内核处理中断的时间为0.76us。 根据客户要求，依照此方法每次发送3个字节，接收4个字节，重复9次。SPI通信过程中内核负荷时间比率为 (0.76/101.88) =0.75% SPI read ID operation once, it will take 130.68 us , includes core deal with interrupt time 0.76us. According to this way, customer want to TX 3bytes then RX 4bytes, 9times，during SPI communication core work load rate is 0.75% 测试结论（Test conclusion） SPI通信过程中DMA模块使用方式不同对于减轻内核负荷作用差异明显。通常SPI进行大量数据传输接收，使用DMA模块能有效减少内核负荷。鉴于客户需求，使用测试场景二的方法可以有效降低内核负荷。 How to use DMA module to reduce core work load, different way lead to different result. In general, using DMA module do amounts of SPI data transfer will reduce core work load . According customer requirement, using test scenario 2 way reduce core work load dramatically。 为什么每次读操作之间需要SPI片选无效 （Why need deassert CS signal between each read operation）？ 根据AT26DF081A手册要求，读ID命令和读阵列命令都需要使片选信号无效用以结束当前的读操作，换言之如果要开始新的读操作，需要结束之前的通信（使片选信号无效）。 AT26DF081A datasheet indicates deasserting the CS pin will terminate the read operation and put the SO pin into a high-impedance state. In order to start new read command operation, it need deassert the CS pin. 计算客户要求每次读命令间隔时间为SPI实际通信时间（以5MHz波特率发送7个字节重复9次 100.8us）加上内核处理中断时间。 According customer requirement SPI each read command interval time is SPI communication time (TX 7bytes 9times with 5MHz baud rate take 100.8us) add core deal with interrupt time. 测试代码（Test source code） 测试代码基于Kientis 100MHz Rev2例程中的[spi_demo]工程，将测试代码替换<spi_demo.c>和<isr.h>文件即可。 Test source code is based on KINETIS512_V2_SC (Kientis 100MHz Rev2 Example Project) [spi_demo] project, using test code instead of orignial <spi_demo.c>&<isr.h> files.

When I developed the software of FSL Air Mouse based on kinetis KL16 , I need read and write more than 1 byte data from or to sensor by i2c. But I don't find any i2c driver which supports mutli-bytes accessing. So I write the i2c driver which supports mutli-bytes accessing. It can run on MCU KL1x series and you can modify it a little for Kinetis K series.

Summary:   This tool is based upon the Audio BiQuad Cookbook Here:   http://www.musicdsp.org/files/Audio-EQ-Cookbook.txt   Very useful for configuring the FRDM-JAM and the MonkeyJam software!     Requirements:   You need a machine with the .net 4.0 Framework (or greater) Installed (Windows 7 or Greater).    If you have issues go here:   Download Microsoft .NET Framework 4 (Standalone Installer) from Official Microsoft Download Center   Instructions:   Just unzip and run the .exe   Please report any problems in the comments section Original Attachment has been moved to: BiQuadFilterView---1.0.0.zip