Hummingbrid Core

Download the SDK

We have assembled an All-In-One SDK that includes SiRV-SDK Toolchain, and OpenOCD. You can download the SDK from given link below.

sirv-e-sdk.tar.lrz

Configuring the working environment

Extract the downloaded archive to the current working directory.

lrzuntar sirv-e-sdk.tar.lrz 

You will need lrzip for the above command to work. Install it using the following command. sudo apt-get install lrzip

Compile the demo program

We are going to Compile a GPIO demo that Blinks the Onboard LED on Lichee Tang.

Use the following cammand to compile the Demo.

cd sirv-e-sdk

make software PROGRAM=demo_gpio BOARD=sirv-e203-lichee

Upload Demo to the board

We need to first setup proper permissions to access USB Debugger.

Add your username to plugdev group. Replace <username> with your present working system’s username.

sudo usermod -a -G plugdev <username>

Set udev rules to enable LicheeTang to be accessed by the plugdev group,

Execute the following command in terminal to create a new udev rules file.

sudo nano /etc/udev/rules.d/45-dt2232.rules

Copy the following code into the text editor and save it, as shown in the following image.

SUBSYSTEMS=="usb", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6010", \
  GROUP="plugdev", \
  MODE="0660"

Execute the following command in terminal to restart the udev service.

sudo service udev restart

Press ctrl+x to save the file

Connect Lichee Tang with RV Debugger as shown below.

Lichee Tang RV Debugger
U0_RX (Pin H13) TX
U0_TX (Pin J13) RX
E_TMS (Pin C9) TMS
E_TDI (Pin B6) TDI
E_TCK (Pin C5) TCK
E_TDO (Pin A4) TDO
GND (Pin G) GND

Pin locations on the Tang board can be found in Pinout Diagram.

Execute the following command in “sirv-e-sdk” folder to upload demo into the board.

make upload PROGRAM=demo_gpio BOARD=sirv-e203-lichee

Debugging the Demo

OpenOCD provides us a nice way to debug our programs.

Run the OpenOCD GDB server with the following command and leave it running.

make run_openocd PROGRAM=demo_gpio BOARD=sirv-e203-lichee

In the other Terminal run the following command to debug your code using familiar GDB Debugger.

make run_gdb PROGRAM= demo_gpio BOARD=sirv-e203-lichee