Nuttx Guide

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NXP S32K148EVB ​

NXP S32K148EVB-Q176 is an evaluation board for the NXP S32K148 MCU based on an Arm Cortex-M4F core.

Features ​

NXP FS32K148UAT0VLUT MCU

:   -   112 MHz Clock (Max.)
    -   2048 Kb Flash
    -   256 Kb SRAM
    -   4 Kb EEPROM

  • NXP UJA1132HWF5V4 System Basis Chip

Connectivity:

:   -   OpenSDA UART (Console @ 115,200 baud)
    -   CAN 2.0 (Transceiver part of UJA1132 SBC)
    -   I/O headers with GPIO, I2C, SPI, etc.

Serial Console ​

By default, the serial console will be provided on the OpenSDA VCOM port:

OpenSDA UART RX PTC6 LPUART1_RX OpenSDA UART TX PTC7 LPUART1_TX

USB drivers for the PEmicro CDC Serial Port are available here: http://www.pemicro.com/opensda/

LEDs and Buttons ​

Leds ​

The S32K148EVB has one RGB LED:

RedLED PTE21 FTM4 CH1 GreenLED PTE22 FTM4 CH2 BlueLED PTE23 FTM4 CH3

An output of '1' illuminates the LED.

If CONFIG_ARCH_LEDS is not defined, then the user can control the LEDs in any way. The following definitions are used to access individual RGB components (see s32k148evb.h):

  • GPIO_LED_R
  • GPIO_LED_G
  • GPIO_LED_B

The RGB components could, alternatively, be controlled through PWM using the common RGB LED driver.

If CONFIG_ARCH_LEDs is defined, then NuttX will control the LEDs on board the S32K148EVB. The following definitions describe how NuttX controls the LEDs:

State Description RED GREEN BLUE

LED_STARTED NuttX has been started OFF OFF OFF LED_HEAPALLOCATE Heap has been allocated OFF OFF ON LED_IRQSENABLED Interrupts enabled OFF OFF ON LED_STACKCREATED LED_INIRQ LED_SIGNAL LED_ASSERTION Idle stack created In an interrupt In a signal handler An assertion failed OFF ON OFF LED_PANIC LED_IDLE The system has crashed S32K148 in sleep mode FLASH OFF OFF

Buttons ​

The S32K148EVB supports two buttons:

SW3 PTC12 SW4 PTC13

OpenSDA Notes ​

  • USB drivers for the PEmicro CDC Serial Port are available here: http://www.pemicro.com/opensda/
  • The drag'n'drog interface expects files in .srec format.
  • Using Segger J-Link: Easy... but remember to use the SWD connector J14 near the touch electrodes and not the OpenSDA connector near the OpenSDA USB connector J7.

Configurations ​

Each S32K148EVB configuration is maintained in a sub-directory and can be selected as follows:

tools/configure.sh s32k148evb:<subdir>

Where <subdir> is one of the sub-directories listed in the next paragraph.

NOTES (common for all configurations):

This configuration uses the mconf-based configuration tool. To change this configuration using that tool, you should:

:   a.  Build and install the kconfig-mconf tool. See
        nuttx/README.txt. Also see additional README.txt files in
        the NuttX tools repository.
    b.  Execute \'make menuconfig\' in nuttx/ in order to start the
        reconfiguration process.
  1. Unless otherwise stated, the serial console used is LPUART1 at 115,200 8N1.

nsh ​

Configures the NuttShell (nsh) located at apps/examples/nsh. Support for builtin applications is enabled, but in the base configuration the only application selected is the "Hello, World!" example.