NXP FRDM-K64F

Overview

The Freedom-K64F is an ultra-low-cost development platform for Kinetis K64, K63, and K24 MCUs.

  • Form-factor compatible with the Arduino R3 pin layout
  • Peripherals enable rapid prototyping, including a 6-axis digital accelerometer and magnetometer to create full eCompass capabilities, a tri-colored LED and 2 user push-buttons for direct interaction, a microSD card slot, and connectivity using onboard Ethernet port and headers for use with Bluetooth* and 2.4 GHz radio add-on modules
  • OpenSDAv2, the NXP open source hardware embedded serial and debug adapter running an open source bootloader, offers options for serial communication, flash programming, and run-control debugging
FRDM-K64F

Hardware

  • MK64FN1M0VLL12 MCU (120 MHz, 1 MB flash memory, 256 KB RAM, low-power, crystal-less USB, and 100 Low profile Quad Flat Package (LQFP))
  • Dual role USB interface with micro-B USB connector
  • RGB LED
  • FXOS8700CQ accelerometer and magnetometer
  • Two user push buttons
  • Flexible power supply option - OpenSDAv2 USB, Kinetis K64 USB, and external source
  • Easy access to MCU input/output through Arduino* R3 compatible I/O connectors
  • Programmable OpenSDAv2 debug circuit supporting the CMSIS-DAP Interface software that provides:
    • Mass storage device (MSD) flash programming interface
    • CMSIS-DAP debug interface over a driver-less USB HID connection providing run-control debugging and compatibility with IDE tools
    • Virtual serial port interface
    • Open source CMSIS-DAP software project
  • Ethernet
  • SDHC

For more information about the K64F SoC and FRDM-K64F board:

Supported Features

The frdm_k64f 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
I2C on-chip i2c
SPI on-chip spi
WATCHDOG on-chip watchdog
ADC on-chip adc
PWM on-chip pwm
ETHERNET on-chip ethernet
UART on-chip serial port-polling; serial port-interrupt
FLASH on-chip soc flash
USB on-chip USB device
SENSOR off-chip fxos8700 polling; fxos8700 trigger

The default configuration can be found in the defconfig file:

boards/arm/frdm_k64f/frdm_k64f_defconfig

Other hardware features are not currently supported by the port.

Connections and IOs

The K64F SoC has five pairs of pinmux/gpio controllers.

Name Function Usage
PTB22 GPIO Red LED
PTE26 GPIO Green LED
PTB21 GPIO Blue LED
PTC6 GPIO SW2 / FXOS8700 INT1
PTC13 GPIO FXOS8700 INT2
PTA4 GPIO SW3
PTB10 ADC ADC1 channel 14
PTB16 UART0_RX UART Console
PTB17 UART0_TX UART Console
PTC8 PWM PWM_3 channel 4
PTC9 PWM PWM_3 channel 5
PTC16 UART3_RX UART BT HCI
PTC17 UART3_TX UART BT HCI
PTD0 SPI0_PCS0 SPI
PTD1 SPI0_SCK SPI
PTD2 SPI0_SOUT SPI
PTD3 SPI0_SIN SPI
PTE24 I2C0_SCL I2C / FXOS8700
PTE25 I2C0_SDA I2C / FXOS8700
PTA5 MII0_RXER Ethernet
PTA12 MII0_RXD1 Ethernet
PTA13 MII0_RXD0 Ethernet
PTA14 MII0_RXDV Ethernet
PTA15 MII0_TXEN Ethernet
PTA16 MII0_TXD0 Ethernet
PTA17 MII0_TXD1 Ethernet
PTA28 MII0_TXER Ethernet
PTB0 MII0_MDIO Ethernet
PTB1 MII0_MDC Ethernet
PTC16 ENET0_1588_TMR0 Ethernet
PTC17 ENET0_1588_TMR1 Ethernet
PTC18 ENET0_1588_TMR2 Ethernet
PTC19 ENET0_1588_TMR3 Ethernet

Note

Do not enable Ethernet and UART BT HCI simultaneously because they conflict on PTC16-17.

System Clock

The K64F SoC is configured to use the 50 MHz external oscillator on the board with the on-chip PLL to generate a 120 MHz system clock.

Serial Port

The K64F SoC has six UARTs. One is configured for the console, another for BT HCI, and the remaining are not used.

USB

The K64F SoC has a USB OTG (USBOTG) controller that supports both device and host functions through its micro USB connector (K64F USB). Only USB device function is supported in Zephyr at the moment.

Programming and Debugging

The FRDM-K64F includes the NXP OpenSDA serial and debug adapter built into the board to provide debugging, flash programming, and serial communication over USB.

To use the pyOCD tools with OpenSDA, follow the instructions in the pyOCD page using the DAPLink FRDM-K64F Firmware. The pyOCD tools are the default for this board, therefore it is not necessary to set OPENSDA_FW=daplink explicitly when using the default flash and debug mechanisms.

With these mechanisms, applications for the frdm_k64f board configuration can be built and flashed in the usual way (see Build an Application and Run an Application for more details).

To use the Segger J-Link tools with OpenSDA, follow the instructions in the Segger J-Link page using the Segger J-Link OpenSDA V2.1 Firmware. The Segger J-Link tools are not the default for this board, therefore it is necessary to set OPENSDA_FW=jlink explicitly in the environment before programming and debugging.

Flashing

This example uses the Hello World sample with the pyOCD tools.

# On Linux/macOS
cd $ZEPHYR_BASE/samples/hello_world
mkdir build && cd build

# On Windows
cd %ZEPHYR_BASE%\samples\hello_world
mkdir build & cd build

# Use cmake to configure a Ninja-based build system:
cmake -GNinja -DBOARD=frdm_k64f ..

# Now run ninja on the generated build system:
ninja flash

Open a serial terminal (minicom, putty, etc.) with the following settings:

  • Speed: 115200
  • Data: 8 bits
  • Parity: None
  • Stop bits: 1

Reset the board and you should be able to see on the corresponding Serial Port the following message:

Hello World! arm

Debugging

You can debug an application in the usual way. Here is an example for the Hello World application.

# On Linux/macOS
cd $ZEPHYR_BASE/samples/hello_world
# If you already made a build directory (build) and ran cmake, just 'cd build' instead.
mkdir build && cd build

# On Windows
cd %ZEPHYR_BASE%\samples\hello_world
# If you already made a build directory (build) and ran cmake, just 'cd build' instead.
mkdir build & cd build

# Use cmake to configure a Ninja-based build system:
cmake -GNinja -DBOARD=frdm_k64f ..

# Now run ninja on the generated build system:
ninja debug