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
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:
- K64F Website
- K64F Datasheet
- K64F Reference Manual
- FRDM-K64F Website
- FRDM-K64F User Guide
- FRDM-K64F Schematics
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 |
| ETHERNET | on-chip | ethernet |
| UART | on-chip | serial port-polling; serial port-interrupt |
| FLASH | on-chip | soc flash |
| 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 |
| PTB16 | UART0_RX | UART Console |
| PTB17 | UART0_TX | UART Console |
| PTC16 | UART3_RX | UART BT HCI |
| PTC17 | UART3_TX | UART BT HCI |
| PTCD0 | SPI0_PCS0 | SPI |
| PTCD1 | SPI0_SCK | SPI |
| PTCD2 | SPI0_SOUT | SPI |
| PTCD3 | 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.
Programming and Debugging¶
Flashing¶
The FRDM-K64F includes an OpenSDA serial and debug adaptor built into the board. The adaptor provides:
- A USB connection to the host computer, which exposes a Mass Storage and an USB Serial Port.
- A Serial Flash device, which implements the USB flash disk file storage.
- A physical UART connection which is relayed over interface USB Serial port.
Flashing an application to FRDM-K64F¶
The sample application Hello World is used for this example. Build the Zephyr kernel and application:
$ cd $ZEPHYR_BASE
$ . zephyr-env.sh
$ cd $ZEPHYR_BASE/samples/hello_world/
$ make BOARD=frdm_k64f
Connect the FRDM-K64F to your host computer using the USB port and you should see a USB connection which exposes a Mass Storage (MBED) and a USB Serial Port. Copy the generated zephyr.bin in the MBED drive.
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