FRDM-MCXC242
Overview
FRDM-MCXC242 is a compact and scalable development board for rapid prototyping of MCX C242 MCU. It offers industry standard headers for easy access to the MCU’s I/Os, integrated open-standard serial interfaces and on-board MCU-Link debugger. The MCXC is a general purpose ultra-low-power MCU family, providing additional memory, communications and analog peripheral.
Hardware
MCXC242VLH Arm Cortex-M0+ microcontroller running at 48 MHz
64LQFP package
64KB flash
16KB SRAM
USB FS 2.0
2x low-power UART, 1x UART, 2x I2C, 2x SPI
FXLS8974CF accelerometer
NTC temperature sensor
RGB user LED
On-board MCU-Link debugger with CMSIS-DAP
Arduino Header, mikroBUS, Pmod
For more information about the MCXC242 SoC and FRDM-MCXC242 board, see these references:
Supported Features
The frdm_mcxc242 board target 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 |
I2C |
on-chip |
i2c |
USB |
on-chip |
USB device |
PWM |
on-chip |
pwm |
ADC |
on-chip |
adc |
LPTMR |
on-chip |
counter |
PIT |
on-chip |
counter |
RTC |
on-chip |
counter |
Targets available
The default configuration can be found in boards/nxp/frdm_mcxc242/frdm_mcxc242_defconfig
Other hardware features are not currently supported by the port.
Connections and IOs
The MCXC242 SoC has five pairs of pinmux/gpio controllers (PORTA/GPIOA, PORTB/GPIOB, PORTC/GPIOC, PORTD/GPIOD, and PORTE/GPIOE) for the FRDM-MCXC242 board.
Name |
Function |
Usage |
|---|---|---|
PTE16 |
ADC |
ADC0 channel 1 |
PTB18 |
GPIO |
Red LED |
PTB19 |
GPIO |
Green LED |
PTA13 |
GPIO |
Blue LED |
PTA1 |
LPUART0_RX |
UART Console |
PTA2 |
LPUART0_TX |
UART Console |
PTA20 |
RESET |
RESET Button SW1 |
PTC1 |
GPIO |
User button SW2 |
PTA4 |
GPIO |
User button SW3 |
PTD6 |
I2C1_SDA |
I2C accelerometer |
PTD7 |
I2C1_SCL |
I2C accelerometer |
System Clock
The MCXC242 SoC is configured to use HIRC running at 48 MHz as a system clock source.
Serial Port
The MCXC242 LPUART0 is used for the console.
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 MCU-Link CMSIS-DAP Onboard Debug Probe.
Using LinkServer
Linkserver is the default runner for this board, and supports the factory
default MCU-Link firmware. Follow the instructions in
MCU-Link CMSIS-DAP Onboard Debug Probe to reprogram the default MCU-Link
firmware. This only needs to be done if the default onboard debug circuit
firmware was changed. To put the board in DFU mode to program the firmware,
short jumper JP1.
Using J-Link
There are two options. The onboard debug circuit can be updated with Segger
J-Link firmware by following the instructions in
MCU-Link JLink Onboard Debug Probe.
To be able to program the firmware, you need to put the board in DFU mode
by shortening the jumper JP1.
The second option is to attach a J-Link External Debug Probe to the
10-pin SWD connector (J10) of the board. Additionally, the jumper JP3 must
be shortened.
For both options use the -r jlink option with west to use the jlink runner.
west flash -r jlink
Configuring a Console
Connect a USB cable from your PC to J9, and use the serial terminal of your choice (minicom, putty, etc.) with the following settings:
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_mcxc242 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 build v3.6.0-4475-gfa5bd8bb098e ***
Hello World! frdm_mcxc242/mcxc242
Debugging
Here is an example for the Hello World application.
# From the root of the zephyr repository
west build -b frdm_mcxc242 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 build v3.6.0-4475-gfa5bd8bb098e ***
Hello World! frdm_mcxc242/mcxc242