README
======
This directory hold the port to the NXP S32K146EVB-Q144 Development board.
Contents
========
o Status
o Serial Console
o LEDs and Buttons
o OpenSDA Notes
o Thread-Aware Debugging with Eclipse
o Configurations
Status
======
2019-08-18: Configuration created but entirely untested.
2019-08-20: For initial testing, I ran out of SRAM to avoid the
brickage problems I had with the S32K118EVB (i.e., with
CONFIG_BOOT_RUNFROMISRAM=y). In this mode, the NSH configuration
appears worked correctly.
2019-18-21: Writing a relocated version of that same functional binary
into FLASH, however, did not work and, in fact, bricked my S32K146EVB.
That is because the first version of the FLASH image that I used
clobbered the FLASH Configuration bytes at address 0x0400 (I
didn't even know about these!). I have since modified the linker script
to skip this are in FLASH. There is some fragmentary discussion
for recovery from this condition at: https://community.nxp.com/thread/505593 .
But none of those options are working for me.
Give the success running of SRAM and the success of the same fixes
on the S32K118, I believe that the NSH configuration should now run out
of FLASH. Unfortunately, I cannot demonstrate that.
TODO: Need 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 OpenSDA VCOM port:
OpenSDA UART TX PTC7 (LPUART1_TX)
OpenSDA UART RX PTC6 (LPUART1_RX)
USB drivers for the PEMIcro CDC Serial port are available here:
http://www.pemicro.com/opensda/
LEDs and Buttons
================
LEDs
----
The S32K146EVB has one RGB LED:
RedLED PTD15 (FTM0 CH0)
GreenLED PTD16 (FTM0 CH1)
BlueLED PTD0 (FTM0 CH2)
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.
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 S32K146EVB. 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 S32K146EVB in sleep mode (no change)
==========================================+========+========+=========
Buttons
-------
The S32K146EVB supports two buttons:
SW2 PTC12
SW3 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 J14 connector
in the center of the board and not the OpenSDA connector closer to the
OpenSDA USB connector J7.
Thread-Aware Debugging with Eclipse
===================================
Based on correspondence with Han Raaijmakers <han.raaijmakers@nxp.com>
OpenOCD-nuttx build on Linux (NXW00504) making use of S32DS for ARM 2018R1. Nuttx is built with debug symbols.
Resulting debug window gives nuttx threads. The full stack details can be viewed.
HOW TO GET THERE:
First we build openocd as described in:
https://micro-ros.github.io/docs/tutorials/advanced/debugging_gdb_openocd/
The nuttx parameters where exactly the same as found on this page
I've added a s32k146.cfg file in the scripts/ folder
Start openocd with following command (adapt the path info)
/usr/local/bin/openocd -f /usr/share/openocd/scripts/interface/jlink.cfg \
-f /home/han/data1Ta/s32k146/openocd-nuttx/tcl/target/s32k146.cfg -c init -c "reset halt"
Configurations
==============
Common Information
------------------
Each S32K146EVB configuration is maintained in a sub-directory and
can be selected as follow:
tools/configure.sh s32k146evb:<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
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 but
the builtin applications selected is the "Hello, World!" example.
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