Red Pitaya Lock-in+PID Application

Lock-in and PID application for RedPitaya enviroment

This is an application build for the Red Pitaya STEMlab 125-14 board (RP). The board is closed-hardware and open-software. You can buy the board and build your own software.

If you have a RP board you can install the Lock-in+PID application by copying the lock_in+pid folder (that comes with this tar/zip file) to the /opt/redpitaya/www/apps folder (inside the RP).

For more information about installing procedure, refer to: https://marceluda.github.io/rp_lock-in_pid/TheApp/install/

The Lock-in+PID project

The project is hosted in: https://marceluda.github.io/rp_lock-in_pid

There you can find documentation about use and building of the app, and some suggested applications.

Compile / implementation HELP

The App was based on code from project: https://github.com/RedPitaya/RedPitaya/tree/release-v0.95/apps-free/scope

Software requirements

You will need the following to build the Red Pitaya components:

1. Various development packages:

sudo apt-get install make u-boot-tools curl xz-utils nano

2. Xilinx Vivado 2015.2 FPGA development tools. The SDK (bare metal toolchain) must also be installed, be careful during the install process to select it. Preferably use the default install location.

3. Linaro ARM toolchain for cross compiling Linux applications. We recommend to install it to /opt/linaro/ since build process instructions relly on it.

TOOLCHAIN="http://releases.linaro.org/14.11/components/toolchain/binaries/arm-linux-gnueabihf/gcc-linaro-4.9-2014.11-x86_64_arm-linux-gnueabihf.tar.xz"
#TOOLCHAIN="http://releases.linaro.org/15.02/components/toolchain/binaries/arm-linux-gnueabihf/gcc-linaro-4.9-2015.02-3-x86_64_arm-linux-gnueabihf.tar.xz"
curl -O $TOOLCHAIN
sudo mkdir -p /opt/linaro
sudo chown $USER:$USER /opt/linaro
tar -xpf *linaro*.tar.xz -C /opt/linaro

NOTE: you can skip installing Vivado tools, if you only wish to compile user space software.

4. Missing gmake path

Vivado requires a gmake executable which does not exist on Ubuntu. It is necessary to create a symbolic link to the regular make executable.

sudo ln -s /usr/bin/make /usr/bin/gmake

5. On Ubuntu Linux you also need:

sudo apt-get install make u-boot-tools curl xz-utils
sudo apt-get install libx32gcc-4.8-dev
sudo apt-get install libc6-dev-i386

The building was tested on Ubuntu 16.04 Linux x86_64

Building

Run on terminal:

$ source settings.sh
$ make

Or form App folder lock_in+pid :

$ source ../settings.sh

and then...

For web controller C code compiling:

$ make app

For FPGA implementation:

$ make fpga

For zip packaging

$ mkdir -p ../archive
$ make zip

For tar.gz packaging

$ mkdir -p ../archive
$ make tar

For cleaning:

$ make clean       # clean all
$ make clean_app   # clean only C objects
$ make clean_fpga  # clean only FPGA implementation temp files and .bin

Upload App to Red Pitaya device

UnZip / UnTar the App folder. Execute from terminal:

$ ./upload_app.sh rp-XXXXXX.local

Replace rp-XXXXXX.local by your RP localname or IP address

Also, you can use your own SSH client and upload the lock_in+pid folder the the RedPiaya folder: /opt/redpitaya/www/apps

Derivated works

• An improved version with another PID added was developed by stefanputz in https://github.com/stefanputz/rp_lock-in_pid
• A version without square lock-in and with modulation added on output signals can be found in rp_lock-in_pid_h. The App and description is available on the project web page.