A look at interrupts in a microcontroller from a generic point of view. This will be used to put the other videos relating to interrupts of the ARM core in context.

How to interrupt the core from a core peripheral.... The Systick Timer.

How to interrupt the core from a a peripheral outside of the core - TPM overflow

In this training video we will examine some concepts in approaching a vehicle control system.  This includes the stages in data flow and update rates of the control software.   The concept of differential steering will be introduced.

Using Header(.h) files provided by Freescale inside CodeWarrior - Blinking an LED

In this video we will look at the example code provided for the FRDM-TFC for use with Codewarrior.  

How to create a basic project from scratch in Codewarrior for the the Freedom board. View Video Link : 1459

El presente proyecto busca solucionar de una manera práctica y divertida actividades de terapia que pueden ser parte de la vida de cada persona con necesidades especiales, especialmente infantes. Por medio de este proyecto se pretende desarrollar la memoria y el orden lógico. Utilizando un sensor óptico para la lectura de pequeños Cubos de colores, el carro donde será transportado el sensor óptico emitirá una nota musical, misma que dependerá del color del cubo. El equipo de trabajo está conformado por cuatro   estudiantes del Tecnologíco de Monterrey de primer semestre de la carrera de mecatronica.

How does a DC Motor work? The DC motor is a machine that transforms electric energy into mechanical energy in form of rotation. Its movement is produced by the physical behavior of electromagnetism. DC motors have inductors inside, which produce the magnetic field used to generate movement. But how does this magnetic field changes if DC current is being used? An electromagnet, which is a piece of iron wrapped with a wire coil that has voltage applied in its terminals. If two fixed magnets are added in both sides of this electromagnet, the repulsive and attractive forces will produce a torque. Then, there are two problems to solve: feeding the current to the rotating electromagnet without the wires getting twisted, and changing the direction of the current at the appropriate time. Both of these problems are solved using two devices: a split-ring commutator, and a pair of brushes. As it can be seen, the commutator has two segments which are connected to each terminal of the electromagnet, besides the two arrows are the brushes which apply electric current to the rotary electromagnet. In real DC motors it can be found three slots instead of two and two brushes. This way, as the electromagnet is moving its polarity is changing and the shaft may keep rotating. Even if it is simple and sounds that it will work great there are some issues which make these motors energy inefficient and mechanically unstable, the principal problem is due to the timing between each polarity inversion. Since polarity in the electromagnet is changed mechanically, at some velocities polarity is changing too soon, which result in reverse impulses and sometimes in changing too late, generating instantaneous “stops” in rotation. Whatever the case, these issues produce current peaks and mechanical instability. How a DC motor can be controlled? DC motors have only two terminals. If you apply a voltage to these terminals the motor will run, if you invert the terminals position the motor will change its direction. If the motor is running and you suddenly disconnect both terminals the motor will keep rotating but slowing down until stopping. Finally if the motor is running and you suddenly short-circuit both terminals the motor will stop. So there is not a third wire to control a DC motor, but knowing the previous behaviors it can be designed a way to control it, and the solution is an H-bridge. Look at the last evolution of the DC Motor above, you can observe that there are four gates and a motor connected between them. This is the simplest H-bridge, where the four gates represent for transistors. By manipulating these gates and connecting the upper and lower terminals to a voltage supply, you can control the motor in all the behaviors as below. Things to Consider When Using Motors With the Motor and Line scan Camera hooked up to the same board there is a significant problem with noise. The higher you turn the PWM on your drive motors the noise produced and the worse the data will appear from the camera. TO significantly reduce this noise you can simply solder an inductor directly across the 2 drive motors. This will allow you to increase the speed of the car without significantly affecting the data you receive back from the camera.

On September 14-15, 2015, The Freescale Cup Worldwide Finals will be held at the Fraunhofer Institute of Integrated Circuits (Fraunhofer IIS) in Erlangen, Germany You can follow along and see the regional champion teams from South Korea, China, India, Taiwan, Malaysia, Mexico, Brazil, USA and Switzerland train and compete for the World Title. Agenda of the event covered by the LiveCast is (all times are Central Europe Time): September 14th 14:00 - 15:00 Opening Ceremony 15:00 - 17:30 Training Session 17:30 - 18:00 High Schools and Innovation Challenge Demonstrations September 15th 9:00 - 13:00 Training Session 13:00 - 14:30 Technical Inspection and preparation for the Finals Race 14:30 - 15:00 Finals Race 15:00 - 15:45 Preparation for the Awards 15:45 - 17:30 Awards Ceremony Download and print the attached poster with the embedded QR-Code for posting the link of the LiveCast Direct LiveCast URL is http://www2.iis.fraunhofer.de/freescale

This tutorial covers the details of Blinking an LED on the TRK-MPC5604B: MPC5604B StarterTRAK evaluation board. It will introduce the evaluation board, and some basic CodeWarrior features. Overview Hardware Set up the Software Development Environment A. Download and Install Codewarrior B. Download and Install Drivers Sample Code Serial Debugging: I made the hardware modifications for serial debugging: I did not make the hardware modifications for serial debugging: Download/Debug/Run Learning Step: LED Code Description Functions Blink the LED(s): Other Qorivva Tutorials Useful Links to Technical Data Overview In this exercise students will run sample code and build an application which enables testing of the Qorivva TRK-MPC5604B board. Students will: Configure the Software Development Environment Configure the evaluation board hardware Learn how to open CodeWarrior project example files Build a project Download and run the code on TRK-MPC5604B board Learn how to utilize the GPIO Peripheral to blink a LED   To successfully complete this exercise, students will need the following board and development environment. TRK-MPC5604B evaluation board CWX-MPC-5500P-EX: Evaluation: CodeWarrior for MPC55xx/MPC56xx Microcontrollers V2.8 (Classic) RAppID initialization Tool P&E Micro Driver Software Hardware Read the MCU 101: LEDs article for general information on LED circuits. The LED's are located on the board and visible in the board schematic on page 4 as below: This schematic is found here. Set up the Software Development Environment There are several steps necessary to prepare the evaluation board and PC for microcontroller programming and development. Interfacing the evaluation board with a PC requires downloading and installing the CodeWarrior IDE, as well as the device drivers for programming the microcontroller via USB. A. Download and Install Codewarrior Before completing this example project, download and install CodeWarrior for MPC56xx 2.8 or the latest version. B. Download and Install Drivers In addition to CodeWarrior, it may (needs verified) be necessary to install one or both of the following tools: RAppID initialization tool- RAppID comes on the DVD provided with your evaluation board. In the main directory of the DVD, click on the "TRK_MPC5604B.html" file to open the DVD interface which provides user manuals, software, schematics and documentation for the evaluation board. P&E Microcomputer Systems, Inc drivers- P&E is a a computer driver for the TRK-MPC5604B device, enabling evaluation board programming via USB through the CodeWarrior debug OSJTAG interface. This driver can be downloaded here Because this isn't found on the disk. Sample Code To use the Hyperterminal communications features described in the following sections and in the attached sample code you must populate the U5 on your TRK-MPC5604B board. Qorivva Sample Code Download Serial Debugging: To use hyperterminal style debugging through the Serial port you must populate U5 with a RS232 transceiver and C55. I made the hardware modifications for serial debugging: From the Start menu Run the hyper terminal by using All programs> Accessories> Communications> HyperTerminal and make COMx properties port s ettings as Baud rate 115200, Data bits 8, Parity None, Stop bits 1 and Flow control None. 8. In the project menu select make (or F7) you will get few warning messages. I did not make the hardware modifications for serial debugging: In the project menu select MAKE (or F7) you will get few warning messages and can ignore them. Next select Debug option (or F5) from project menu. The debug window opens with few sub windows such as Code, Status and CPU etc. To run the program, select the Source GO menu button. Note: Much of the code in the sample file is utilized to send and receive messages serially. Some quick, minor changes can be applied as follows: Open main.c within the for loop, remove or comment out all the code. Now, manually call the specific function desired, in this case: for (; ; )      {           LED();      } Download/Debug/Run In sample.mcp project manager window target selection window is set to the default RAM. This means the code runs in the RAM. This target option can be changed using the drop down menu to internal_FLASH. This means the code runs in the flash and this code can run without debugger when the board is powered up. You can select either RAM target or internal_FLASH target for the following test procedure. If you select internal_FLASH target you can test the standalone operation of the board. If you encounter errors, look in the Problems view and resolve them. You can ignore any warnings. If the project builds correctly, it is time to download to the board and watch it work. Ensure that the USB cable that came with the board connects the board to the host computer’s USB port. There are multiple ways to issue the Debug command. Right click the project in the projects view and choose Debug As->CodeWarrior Download. Alternatively, y go to the Run menu and choose Debug (F11). Learning Step: LED Code Description Within the sample code, there is a for loop which calls a switch statement. With working hyper-terminal and proper serial connector interface into a PC, entering the numerical characters "1" - "9" into the hyper-terminal will call each separate function initiating the following actions Blinks Leds & outputs text strings to hyperterminal Calls the Switch function - which sends text strings to hyperterminal indicating which switch has been pressed Calls the Servo function which sweeps the servo back and forth; sends text strings to hyperterminal Calls the motor function which enables and disables the left motor; sends status text strings to hyperterminal Calls the motor function which enables and disables the right motor; sends status text strings to hyperterminal Calls the Camera function which sends the correct signals to the camera and reads the data; sends status text strings to hyperterminal Calls the Left_Motor_Current function; sends status text strings to hyperterminal Calls the Right_Motor_Current function; sends status text strings to hyperterminal   (hyperterminal code documentation needs verified ) TransmitData("\n\r**The Freescale Cup**");         TransmitData("\n\r*********************");         TransmitData("\n\r1.Led\n\r");         TransmitData("2.Switch\n\r");         TransmitData("3.Servo\n\r");         TransmitData("4.Motor Left\n\r");         TransmitData("5.Motor Right\n\r");         TransmitData("6.Camera\n\r");         TransmitData("7.Left Motor Current\n\r");         TransmitData("8.Right Motor Current");         TransmitData("\n\r**********************"); option = ReadData(); option = 1;     switch(option)         {             case '1':                 LED();             break;             case '2':                 SWITCH();             break;             case '3':                 SERVO();             break;             case '4':                 MOTOR_LEFT();             break;             case '5':                 MOTOR_RIGHT();             break;             case '6':                 CAMERA();             break;             case '7':                 LEFT_MOTOR_CURRENT();             break;             case '8':                 RIGHT_MOTOR_CURRENT();             break;             default:             break;          } As visible from the schematic - the LED's are accessed via the following ports. Hardware Chip Port/Pin Comment LED1 PE4 LED2 PE5 LED3 PE6 LED4 PE7 Functions The following function is utilized in the code to blink the LED's This function is located in main.c void LED(void) {    SIU.PCR[68].R = 0x0200;  /* Program the drive enable pin of LED1 (PE4) as output*/    SIU.PCR[69].R = 0x0200;  /* Program the drive enable pin of LED2 (PE5) as output*/    SIU.PCR[70].R = 0x0200;  /* Program the drive enable pin of LED3 (PE6) as output*/    SIU.PCR[71].R = 0x0200;  /* Program the drive enable pin of LED4 (PE7) as output*/    TransmitData("****Led Test****\n\r");    TransmitData("All Led ON\n\r");    Delayled();    SIU.PGPDO[2].R |= 0x0f000000;  /* Disable LEDs*/    SIU.PGPDO[2].R &= 0x07000000;  /* Enable LED1*/    TransmitData("Led 1 ON\n\r");    Delayled();    SIU.PGPDO[2].R |= 0x08000000;  /* Disable LED1*/    SIU.PGPDO[2].R &= 0x0b000000;  /* Enable LED2*/    TransmitData("Led 2 ON\n\r");    Delayled();    SIU.PGPDO[2].R |= 0x04000000;  /* Disable LED2*/    SIU.PGPDO[2].R &= 0x0d000000;  /* Enable LED3*/    TransmitData("Led 3 ON\n\r");    Delayled();    SIU.PGPDO[2].R |= 0x02000000;  /* Disable LED3*/    SIU.PGPDO[2].R &= 0x0e000000;  /* Enable LED4*/    TransmitData("Led 4 ON\n\r");    Delayled();    SIU.PGPDO[2].R |= 0x01000000;  /* Disable LED4*/ } Code Details: SIU - System Integration Unit PCR - Port Configuration Register PGPDO - Parallel GPIO Pad Data Output Registers : definition From viewing the user manual, under Functional port pin descriptions, it is Blink the LED(s): Within the main find the infinite for loop. for ( ; ; )      {      } loop of Main.c, remove all code, and add the LED's with the following function: for(;;) { LED(); } To alter the behavior of the LEDs, change the function itself, or pull specific code from the function and insert it within loops of a program for testing purposes. LED's are often used for testing important parts of an algorithm. By connecting an oscilloscope to a LED, it is possible to test the duration of a key algorithm, or to verify if signal timing is as expected along with the visual cue. Other Qorivva Tutorials Qorivva: Drive DC Motor Tutorial Qorivva: Turning A Servo Qorivva: Line Scan Camera Tutorial Useful Links to Technical Data TRK-MPC5064B Freescale Webpage TRK-MPC5064B Freescale Reference Manual TRK-MPC5064B Freescale Schematic

Este proyecto está siendo desarrollado por alumnos del Tecnológico de Monterrey Campus Guadalajara, el cual está orientado para servir como un tipo de terapia para personas discapacitadas. El proyecto en sí consiste en el control de un vehículo de juguete por medio de pulsaciones que serán realizadas con pelotas anti-estrés, de esta forma la persona podrá realizar un ejercicio de fortalecimiento en sus extremidades superiores de una forma más entretenida y menos tediosa que las clásicas terapias. Es importante mencionar que para poder realizar este proyecto es necesario el uso de dos tarjetas Freedom KL25Z de Freescale®, dos módulos Bluetooth®, dos servomotores de rotación continua y dos sensores de presión, los cuales serán incorporados dentro de las pelotas anti-estrés. El vehículo de juguete estará compuesto por los servomotores, que servirán como llantas; un módulo Bluetooth®, el cual recibirá las señales del otro módulo; y una de las tarjetas Freedom KL25Z. Por otro lado una de las tarjetas Freedom KL25Z estará conectada con los sensores integrados en las pelotas anti-estrés y a un módulo cuya función es mandar la información capturada por los sensores al vehículo de juguete. La mecánica del proyecto depende de la pelota que sea presionada, pues si se presiona solamente una pelota, el vehículo avanzará, por otro lado si se presiona la otra pelota, el vehículo girará sobre su propio eje. Este proyecto tiene como fin la implementación de conocimiento prácticos y teóricos en busca de una aportación en beneficio de la sociedad. También es relevante comentar que las visiones a futuro de este proyecto es que pueda ser implementado como una especie de control para una silla de ruedas, con el fin de facilitar la movilidad y aumentar la comodidad al momento de usar este tipo de vehículo. Original Attachment has been moved to: Codigo-tarjetas-freedom.zip

Check the Freedom Zumo Robot designed with the Freedom Kinetis FRDM-KL25Z. Check the full development at The Freedom Zumo Robot | MCU on Eclipse

Hi,     I will present to you my first personal initiated project named Spectrum analyzer. This spectrum is based on sampling signal and calculating his spectrum using FFT algorithm. Attached here presentation, documentation (french), electrical scheme of amplification circuit and source code of both programs (Computer and PXS20)   Picture of the spectrum analyzer with TWR-PXS20, TWR-SER and TWR-PROTO :   Picture of amplification circuit :   Picture of signal collected by the ADC :   And here we have the spectrum :   Thank you, and I hope you like it

This tutorial covers the details of Blinking an LED on the Kinetis K40 using the TWR-K40X256-KIT evaluation board. It will introduce the evaluation board, and some basic CodeWarrior features. Overview 1. Hardware 2. Set up the Software Development Environment A. Download and Install Codewarrior B. Download and Install Drivers 3. Set up the Hardware: Twr K40x256 Hardware Setup 4. Import the LED Project 5. Build the Code 6. Download/Debug/Run 7. Learning Step: LED Code Description Read/Write Functions Variables Header File Definitions Initialize the GPIO Blink the LED: Other K40 Tutorials: K40 Related Pages Credits / References Overview   In this exercise students will explore a Freescale Cup Car application which targets a Freescale K40 board attached to the Tower System.   Students will: Configure the Software Development Environment Configure the evaluation board hardware Learn how to import example files into a CodeWarrior project Build a project Download and run the code on a Kinetis K40 Tower System board Learn how to utilize the GPIO Peripheral to blink a LED     To successfully complete this exercise, students will need the following board and development environment. The K40 Tower card, TWR-K40x256 CodeWarrior for Microcontrollers USB Cord 1. Hardware     Read the Blink LED overview article for general information on LED circuits, GPIO pins and reference manuals.   2. Set up the Software Development Environment   There are several steps necessary to prepare the evaluation board and PC for microcontroller programming and development. Interfacing the evaluation board with a PC requires downloading and Install the CodeWarrior IDE, as well as the device drivers for programming the microcontroller via USB. A. Download and Install Codewarrior   Before completing this example project, download-and-install-codewarrior-10-1 or the latest version compatible with the twr-k40x256-kit.   B. Download and Install Drivers   In addition to CodeWarrior, it may(needs verified) be necessary to install one or both of the following tools: RAppID initialization tool- RAppID comes on the DVD provided with your evaluation board. In the main directory of the DVD, click on the "TRK_MPC5604B.html" file to open the DVD interface which provides user manuals, software, schematics and documentation for the evaluation board. P&E Microcomputer Systems, Inc drivers- P&E is a a computer driver for the TRK-MPC5604B and Kinetis Tower system device, enabling evaluation board programming via USB through the CodeWarrior debug OSJTAG interface. This driver can be downloaded here in case this isn't found on the disk.   3. Set up the Hardware: Twr K40x256 Hardware Setup   There are several Twr K40x256 hardware configuration steps. Follow the twr-k40x256-hardware-setup instructions before importing the LED Project. 4. Import the LED Project   After the software is successfully downloaded and installed, the next step is to import an existing project into your Workspace. in this case, the LED_BLINK_96MHZ Project. Follow the instructions on the codewarrior-project-import page to import the LED_BLINK_96MHZ project into CodeWarrior. If errors are encountered, look in the Problems view and resolve them. Ignore any warnings. 5. Build the Code   If there is more than one project in your project view, make sure the proper project is the focus. The most reliable way to do this is to right click the project and choose Build Project as shown below. You can also go to the Project menu and choose the same command. By default, the application is set to link to RAM. If you want your program in FLASH, make sure that you have that build configuration enabled:     Make sure you do a "Clean" operation (under the project menu) after you make the configuration change. If you encounter errors, look in the problems view and resolve them. You can ignore any warnings. 6. Download/Debug/Run   If the project builds correctly, it is time to download to the board and watch it work. Ensure that the USB cable that came with the board connects the board to the host computer’s USB port. There are multiple ways to issue the Debug command. Right click the project in the projects view and choose Debug As->CodeWarrior Download. Alternatively, y go to the Run menu and choose Debug (F11). Click the Resume button and your should see the LED blinking! Click the Pause button to stop execution. Click the Terminate button to end debugging. 7. Learning Step: LED Code Description Read/Write   If the LED was on Port C, Bit 7 we might have code like: #define LED_E1_Location(1<<7)   For example, to toggle a pin the following code might be used: GPIOC_PSOR=LED_E1_LOC     "Sets" the LED located at "E1" high.   the syntax means the following GPIOC refers to Port C   "Set" is one of three commonly utilized commands for GPIO control. There are also commands for "Clear" and "Toggle."   Command: "GPIOC_PSOR" literally means PORT SET OUTPUT REGISTER which SETS a pin high Command: "GPIOC_PCOR" clears a pin, PORT CLEAR OUTPUT REGISTER which CLEARS a pin to the "low" state Command: "GPIOC_PTOR" toggles a pin opposite of the current state   the « is a "shift" command which is discussed in the c-programming-for-embedded-systems. You can alter the raw register as well using a MASK but the dedicated set/clear/toggle registers are more straightforward.   **NEEDS UPDATED ** Hardware Chip Port/Pin Comment SW3 PT cell-content SW4 cell-content cell-content Functions   The following functions can access the LED; //Where n is the LED number LED_En_TOGGLE;  //will toggle a LED to a different state LED_En_ON; // turns the LED ON LED_En_OFF // turns the LED OFF Variables   Locations of the LED's LED_E1_LOC LED_E2_LOC LED_E3_LOC LED_E4_LOC Header File Definitions   from k40_TOWER_BOARD_SUPPORT.h //The E1 LED is on Port C, Bit 7 #define LED_E1_LOC (1<<7) #define LED_E2_LOC (1<<8) #define LED_E3_LOC (1<<9) #define LED_E4_LOC (1<<11)    //There are dedicated set and clear registers.    //Write a one to PSOR Sets the Bits, Writing to PCOR clears bits.    //Toggling a bit can be done with the PTOR register    //You can access the raw register as well -> PDOR |= My Bit    //but the dedicated bit set/clear/toggle registers are easier!    //Also, The cathode of the LEDs are towards the port pin! This means    //you have to turn the port off to get the LED to turn the pin on. #define LED_E1_OFF   GPIOC_PSOR=LED_E1_LOC #define LED_E1_ON   GPIOC_PCOR=LED_E1_LOC #define LED_E1_TOGGLE   GPIOC_PTOR=LED_E1_LOC #define LED_E2_OFF   GPIOC_PSOR=LED_E2_LOC #define LED_E2_ON   GPIOC_PCOR=LED_E2_LOC #define LED_E2_TOGGLE   GPIOC_PTOR=LED_E2_LOC #define LED_E3_OFF   GPIOC_PSOR=LED_E3_LOC #define LED_E3_ON   GPIOC_PCOR=LED_E3_LOC #define LED_E3_TOGGLE   GPIOC_PTOR=LED_E3_LOC #define LED_E4_OFF   GPIOB_PSOR=LED_E4_LOC #define LED_E4_ON   GPIOB_PCOR=LED_E4_LOC #define LED_E4_TOGGLE   GPIOB_PTOR=LED_E4_LOC Initialize the GPIO   From K40_TOWER_BOARD_SUPPORT.c void InitK40GPIO() {    SIM_SCGC5 = SIM_SCGC5_PORTA_MASK | SIM_SCGC5_PORTB_MASK | SIM_SCGC5_PORTC_MASK | SIM_SCGC5_PORTD_MASK | SIM_SCGC5_PORTE_MASK;    //To use a Port, its Clock must be enabled!!    //Lets just enable the clocks for ALL of the ports    //Important! Each IO pin has a dedicated 32-bit Register to set it up (Selection GPIO vs peripheral, IRQ, Etc.)    //Setup port C7,C8,C9 and B11 as GPIO and enable High Drive Strength    PORTC_PCR7 = PORT_PCR_MUX(1) | PORT_PCR_DSE_MASK;  //Enable GPIO on on the pin    PORTC_PCR8 = PORT_PCR_MUX(1) | PORT_PCR_DSE_MASK;  //Enable GPIO on on the pin    PORTC_PCR9 = PORT_PCR_MUX(1) | PORT_PCR_DSE_MASK;  //Enable GPIO on on the pin    PORTB_PCR11 = PORT_PCR_MUX(1) | PORT_PCR_DSE_MASK;  //Enable GPIO on on the pin    PORTC_PCR18 = PORT_PCR_MUX(1) | PORT_PCR_DSE_MASK;    PORTE_PCR28 = PORT_PCR_MUX(1) | PORT_PCR_DSE_MASK;    //Make Sure the GPIO is setup to be an output    GPIOC_PDDR |= LED_E1_LOC | LED_E2_LOC | LED_E3_LOC;    GPIOB_PDDR |= LED_E4_LOC;    LED_E1_OFF;    LED_E2_OFF;    LED_E3_OFF;    LED_E4_OFF; } Blink the LED:   Within Main.c or any other C file created, Blink the LED's using the following functions: LED_E1_TOGGLE; LED_E1_ON; LED_E2_OFF; Other K40 Tutorials:   K40 Related Pages   K40: Turning A Servo Tutorial   K40: Drive DC Motor Tutorial Kinetis K40 TWR-K40X256 K40: Blinking LED Credits / References   Some of the content from this tutorial originated from:   Shawn Moffit: Electrical Engineering, Penn State University for - K40 Code   Processor Expert Hands-On Lab Rev. 1.0, 05/2011 by Jim Trudeau, Freescale Semiconductor, Inc. for - some text descriptions of steps Original Attachment has been moved to: LED_BLINK_96MHZ.zip

Continue discussion on the line scan camera. A completely interrupt driven approach to the interface will be illustrated.