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
CAN on-chip can

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

Build and flash applications as usual (see Building an Application and Run an Application 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 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.

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 J26.

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 Hello World application.

# From the root of the zephyr repository
west build -b frdm_k64f samples/hello_world
west flash

Open a serial terminal, reset the board (press the SW1 button), and you should see the following message in the terminal:

***** Booting Zephyr OS v1.14.0-rc1 *****
Hello World! frdm_k64f

Debugging

Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b frdm_k64f samples/hello_world
west debug

Open a serial terminal, step through the application in your debugger, and you should see the following message in the terminal:

***** Booting Zephyr OS v1.14.0-rc1 *****
Hello World! frdm_k64f