.. _twr_ke18f: NXP TWR-KE18F ############# Overview ******** The TWR-KE18F is a development board for NXP Kinetis KE1xF 32-bit MCU-based platforms. The onboard OpenSDAv2 serial and debug adapter, running an open source bootloader, offers options for serial communication, flash programming, and run-control debugging. .. figure:: ./TWR-KE18F-DEVICE.jpg :width: 800px :align: center :alt: TWR-KE18F TWR-KE18F (Credit: NXP) Hardware ******** - MKE18F512VLL16 MCU (up to 168 MHz, 512 KB flash memory, 64 KB RAM, and 100 Low profile Quad Flat Package (LQFP)) - 3.3 V or 5 V MCU operation - 6-axis FXOS8700CQ digital accelerometer and magnetometer - RGB LED - Four user LEDs - Two user push-buttons - Potentiometer - Thermistor - Infrared port (IrDA) - CAN pin header - Flex I/O pin header For more information about the KE1xF SoC and the TWR-KE18F board, see these NXP reference documents: - `KE1xF Website`_ - `KE1xF Datasheet`_ - `KE1xF Reference Manual`_ - `TWR-KE18F Website`_ - `TWR-KE18F User Guide`_ - `TWR-KE18F Schematics`_ Supported Features ================== The twr_ke18f board configuration supports the following hardware features: +-----------+------------+-------------------------------------+ | Interface | Controller | Driver/Component | +===========+============+=====================================+ | NVIC | on-chip | nested vector interrupt controller | +-----------+------------+-------------------------------------+ | SYSTICK | on-chip | systick | +-----------+------------+-------------------------------------+ | PINMUX | on-chip | pinmux | +-----------+------------+-------------------------------------+ | GPIO | on-chip | gpio | +-----------+------------+-------------------------------------+ | UART | on-chip | serial port-polling; | | | | serial port-interrupt | +-----------+------------+-------------------------------------+ | FLASH | on-chip | soc flash | +-----------+------------+-------------------------------------+ | RTC | on-chip | rtc | +-----------+------------+-------------------------------------+ | I2C(M) | on-chip | i2c | +-----------+------------+-------------------------------------+ | SENSOR | off-chip | fxos8700 polling; | | | | trigger supported with H/W mods | | | | explained below; | +-----------+------------+-------------------------------------+ | SPI(M) | on-chip | spi | +-----------+------------+-------------------------------------+ | ADC | on-chip | adc | +-----------+------------+-------------------------------------+ | CAN | on-chip | can | +-----------+------------+-------------------------------------+ | WDT | on-chip | watchdog | +-----------+------------+-------------------------------------+ | PWM | on-chip | pwm | +-----------+------------+-------------------------------------+ | DAC | on-chip | dac | +-----------+------------+-------------------------------------+ | ACMP | on-chip | analog comparator | +-----------+------------+-------------------------------------+ The default configuration can be found in the defconfig file: ``boards/arm/twr_ke18f/twr_ke18f_defconfig``. Other hardware features are not currently supported by the port. System Clock ============ The KE18 SoC is configured to use the 8 MHz external oscillator on the board with the on-chip PLL to generate a 120 MHz system clock. Serial Port =========== The KE18 SoC has three UARTs. UART0 is configured for the console. The remaining UARTs are not used. Accelerometer and magnetometer ============================== The TWR-KE18F board by default only supports polling the FXOS8700 accelerometer and magnetometer for sensor values (``CONFIG_FXOS8700_TRIGGER_NONE=y``). In order to support FXOS8700 triggers (interrupts) the 0 ohm resistors ``R47`` and and ``R57`` must be mounted on the TWR-KE18F board. The devicetree must also be modified to describe the FXOS8700 interrupt GPIOs: .. code-block:: none /dts-v1/; &fxos8700 { int1-gpios = <&gpioa 14 0>; int2-gpios = <&gpioc 17 0>; }; Finally, a trigger option must be enabled in Kconfig (either ``FXOS8700_TRIGGER_GLOBAL_THREAD=y`` or ``FXOS8700_TRIGGER_OWN_THREAD=y``). Programming and Debugging ************************* Build and flash applications as usual (see :ref:`build_an_application` and :ref:`application_run` for more details). Configuring a Debug Probe ========================= A debug probe is used for both flashing and debugging the board. This board is configured by default to use the :ref:`opensda-daplink-onboard-debug-probe`. Early versions of this board have an outdated version of the OpenSDA bootloader and require an update. Please see the `DAPLink Bootloader Update`_ page for instructions to update from the CMSIS-DAP bootloader to the DAPLink bootloader. Option 1: :ref:`opensda-daplink-onboard-debug-probe` (Recommended) ------------------------------------------------------------------ Install the :ref:`pyocd-debug-host-tools` and make sure they are in your search path. Follow the instructions in :ref:`opensda-daplink-onboard-debug-probe` to program the `OpenSDA DAPLink TWR-KE18F Firmware`_. Option 2: :ref:`opensda-jlink-onboard-debug-probe` -------------------------------------------------- Install the :ref:`jlink-debug-host-tools` and make sure they are in your search path. Follow the instructions in :ref:`opensda-jlink-onboard-debug-probe` to program the `OpenSDA J-Link Firmware for TWR-KE18F`_. Add the arguments ``-DBOARD_FLASH_RUNNER=jlink`` and ``-DBOARD_DEBUG_RUNNER=jlink`` when you invoke ``west build`` to override the default runner from pyOCD to J-Link: .. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: twr_ke18f :gen-args: -DBOARD_FLASH_RUNNER=jlink -DBOARD_DEBUG_RUNNER=jlink :goals: build Configuring a Console ===================== Regardless of your choice in debug probe, we will use the OpenSDA microcontroller as a usb-to-serial adapter for the serial console. Connect a USB cable from your PC to J2. Use the following settings with your serial terminal of choice (minicom, putty, etc.): - Speed: 115200 - Data: 8 bits - Parity: None - Stop bits: 1 Flashing ======== Here is an example for the :ref:`hello_world` application. .. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: twr_ke18f :goals: flash Open a serial terminal, reset the board (press the SW1 button), and you should see the following message in the terminal: .. code-block:: console ***** Booting Zephyr OS v1.14.0-xxx-gxxxxxxxxxxxx ***** Hello World! twr_ke18f Debugging ========= Here is an example for the :ref:`hello_world` application. .. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: twr_ke18f :goals: debug Open a serial terminal, step through the application in your debugger, and you should see the following message in the terminal: .. code-block:: console ***** Booting Zephyr OS v1.14.0-xxx-gxxxxxxxxxxxx ***** Hello World! twr_ke18f .. _TWR-KE18F Website: https://www.nxp.com/TWR-KE18F .. _TWR-KE18F User Guide: https://www.nxp.com/docs/en/user-guide/TWRKE18FUG.pdf .. _TWR-KE18F Schematics: https://www.nxp.com/webapp/Download?colCode=TWR-KE18F-SCH-DESIGNFILES .. _KE1xF Website: https://www.nxp.com/products/processors-and-microcontrollers/arm-based-processors-and-mcus/kinetis-cortex-m-mcus/e-series5v-robustm0-plus-m4/kinetis-ke1xf-168mhz-performance-with-can-5v-microcontrollers-based-on-arm-cortex-m4:KE1xF .. _KE1xF Datasheet: https://www.nxp.com/docs/en/data-sheet/KE1xFP100M168SF0.pdf .. _KE1xF Reference Manual: https://www.nxp.com/docs/en/reference-manual/KE1xFP100M168SF0RM.pdf .. _DAPLink Bootloader Update: https://os.mbed.com/blog/entry/DAPLink-bootloader-update/ .. _OpenSDA DAPLink TWR-KE18F Firmware: https://www.nxp.com/support/developer-resources/run-time-software/kinetis-developer-resources/ides-for-kinetis-mcus/opensda-serial-and-debug-adapter:OPENSDA#TWR-KE18F .. _OpenSDA J-Link Firmware for TWR-KE18F: https://www.segger.com/downloads/jlink/OpenSDA_TWR-KE18F