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Compiling and Installing the NuttX on Bambino 200E board

This tutorial is for Ubuntu 16.04 LTS, but can be adapted for other distros.

Pre-requisites

First, install the necessary packages:

sudo apt-get install automake bison build-essential flex gperf git libncurses5-dev libtool libusb-dev libusb-1.0.0-dev

Work folder

Create a workspace directory:

mkdir -p ~/nuttxspace
cd ~/nuttxspace

Toolchain installation

Install the ARM GCC Toolchain, ensuring a version >= gcc version 6.3.1 20170620.

From the repositories

sudo apt-get install gcc-arm-none-eabi

Cloning NuttX

Clone the NuttX repositories:

git clone https://bitbucket.org/nuttx/nuttx
git clone https://bitbucket.org/nuttx/apps
git clone https://bitbucket.org/nuttx/tools

Compiling Kconfig

Compile kconfig in tools/kconfig-frontends/:

cd tools/kconfig-frontends/
./bootstrap
./configure
make
sudo make install

This installs kconfig in /usr/local/bin.

Compiling NuttX

Compile NuttX for the Bambino board:

cd ~/nuttxspace/nuttx/tools
./configure.sh bambino-200e/nsh
cd ..
make

This creates nuttx.bin to be flashed onto the Bambino board.

Flashing to the board

Several methods are available for flashing the board:

Note: OpenOCD version 0.10 or newer is required.

Connect the ST-Link v2 to the J5 connector on the board and use:

sudo openocd -f interface/stlink-v2.cfg -f target/lpc4350.cfg -c init -c "reset halt" -c "flash write_image erase nuttx.bin 0x14000000"

Use a USB/Serial board connected to Slot 5 and a terminal like “minicom” set to 115200 8n1 to access the NuttX prompt.

Note: OpenOCD version 0.10 or newer is required.

Edit jlink.cfg to use SWD:

sudo vi /usr/local/share/openocd/scripts/interface/jlink.cfg

Add:

transport select swd

Then flash with:

sudo openocd -f interface/jlink.cfg -f target/lpc4350.cfg -c init -c "reset halt" -c "flash write_image erase nuttx.bin 0x14000000"

Or:

sudo openocd -f interface/jlink.cfg -f board/lpc4350_spifi_generic.cfg -c init -c "reset halt" -c "flash write_image erase nuttx.bin 0x14000000"

Using lpc21isp

Install lpc21isp:

sudo apt-get install lpc21isp

Produce a .hex file:

make menuconfig

Select Intel HEX binary format, save, and exit. Then:

make

Flash the firmware:

lpc21isp nuttx.hex /dev/ttyUSB0 115200 12000

Change /dev/ttyUSB0 to match your device.

Install SEGGER’s Software & documentation pack from their website.

Start the debug server and GDB:

JLinkGDBServer -device LPC4330_M4 -endian little -if JTAG -speed 10000 -localhostonly
arm-none-eabi-gdb -ex "set target-charset ASCII" -ex "set print pretty on" -ex "target remote :2331" -ex "set mem inaccessible-by-default off" nuttx

Upload code with GDB:

Ctrl+C
load
monitor reset
continue

Using LPCScrypt

Follow the User Guide from NXP, particularly sections 3.2 and 3.3. Install LPCScrypt from their website.

Enter bootloader mode:

Flash firmware with LPCScrypt:

./scripts/boot_lpcscrypt 
./bin/lpcscrypt program +c /path/to/nuttx/nuttx.bin BankA
./bin/lpcscrypt resetCore

Or:

sleep 1
./bin/lpcscrypt -d /dev/ttyACM0 program +c LPC4330_M4/Smoothie2.bin SPIFI
sleep 1
./bin/lpcscrypt -d /dev/ttyACM0 resetCore

Verifying NuttX Initialization

After flashing nuttx.bin, connect a USB/Serial board to Slot 5 and use “minicom” at 115200 8n1. Press “RESET” and you should see:

NuttShell (NSH)                                                                    
nsh>

Type “help” or “?” for commands.

Testing Ethernet

Compile with:

cd ~/nuttxspace/nuttx/tools
./configure.sh bambino-200e/netnsh
cd ..
make

Flash nuttx.bin, connect to your router, and use telnet with the IP assigned to the board.

Testing USB

Compile with:

cd ~/nuttxspace/nuttx/tools
./configure.sh bambino-200e/usbnsh
cd ..
make

Flash nuttx.bin, connect USB0 to your PC, reset the board, and use “minicom” with /dev/ttyACM0 at 115200 8N1.

Testing SD Card

TODO

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