README
======
This directory holds the port to the NXP MR-CANHUBK3 board.
Contents
========
o Status
o Serial Console
o LEDs and Buttons
o Configurations
Status
======
2021-09-28: Configuration created (copy-paste from S32K344EVB).
Remains untested, because hardware is not available yet.
TODO: Need to calibrate the delay loop. The current value of
CONFIG_BOARD_LOOPSPERMSEC is a bogus value retained from a copy-paste
(see apps/examples/calib_udelay).
Serial Console
==============
By default, the serial console will be provided on the DCD-LZ UART
(available on the 7-pin DCD-LZ debug connector P6):
DCD-LZ UART RX PTA8 (LPUART2_RX)
DCD-LZ UART TX PTA9 (LPUART2_TX)
LEDs and Buttons
================
LEDs
----
The MR-CANHUBK3 has one RGB LED:
RedLED PTE14 (FXIO D7 / EMIOS0 CH19)
GreenLED PTA27 (FXIO D5 / EMIOS1 CH10 / EMIOS2 CH10)
BlueLED PTE12 (FXIO D8 / EMIOS1 CH5)
An output of '0' 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 mr-canhubk3.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 MR-CANHUBK3. The following definitions describe how NuttX controls the
LEDs:
==========================================+========+========+=========
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 Idle stack created OFF ON OFF
LED_INIRQ In an interrupt (no change)
LED_SIGNAL In a signal handler (no change)
LED_ASSERTION An assertion failed (no change)
LED_PANIC The system has crashed FLASH OFF OFF
LED_IDLE S32K344 in sleep mode (no change)
==========================================+========+========+=========
Buttons
-------
The MR-CANHUBK3 supports two buttons:
SW1 PTD15 (EIRQ31)
SW2 PTA25 (EIRQ5 / WKPU34)
Configurations
==============
Common Information
------------------
Each MR-CANHUBK3 configuration is maintained in a sub-directory and can be
selected as follows:
tools/configure.sh mr-canhubk3:<subdir>
Where <subdir> is one of the sub-directories listed in the next paragraph.
NOTES (common for all configurations):
1. 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.
2. Unless otherwise stated, the serial console used is LPUART1 at
115,200 8N1. This corresponds to the OpenSDA VCOM port.
Configuration Sub-directories
-----------------------------
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.
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