Here you will find the sources of various software components of the Red Pitaya system. The components are mainly contained in dedicated directories, however, due to the nature of the Xilinx SoC "All Programmable" paradigm and the way several components are interrelated, some components might be spread across many directories or found at different places one would expect.

Red Pitaya is developed on Linux, so Linux (preferably Ubuntu) is also the only platform we support.

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

Go to your preferred development directory and clone the Red Pitaya repository from GitHub.

git clone https://github.com/RedPitaya/RedPitaya.git
cd RedPitaya

An example script settings.sh is provided for setting all necessary environment variables. The script assumes some default tool install paths, so it might need editing if install paths other than the ones described above were used.

. settings.sh

Prepare a download cache for various source tarballs. This is an optional step which will speedup the build process by avoiding downloads for all but the first build. There is a default cache path defined in the settings.sh script, you can edit it and avoid a rebuild the next time.

mkdir -p dl
export BR2_DL_DIR=$PWD/dl

To build everything just run make.

make

The next components can be built separately.

• FPGA + device tree
• API
• free applications
• SCPI server
• Linux kernel
• Debian OS

Here base system represents everything before Linux user space.

Detailed instructions are provided for building the FPGA including some device tree details.

To build the U-Boot binary and boot scripts (used to select between booting into Buildroot or Debian):

make tmp/u-boot.elf
make build/u-boot.scr

The build process downloads the Xilinx version of U-Boot sources from Github, applies patches and starts the build process. Patches are available in the patches/ directory.

To build a Linux image:

make tmp/uImage

The build process downloads the Xilinx version of Linux sources from Github, applies patches and starts the build process. Patches are available in the patches/ directory.

The created boot file contains FSBL, FPGA bitstream and U-Boot binary.

make tmp/boot.bin.uboot

Since file tmp/boot.bin.uboot is created it should be renamed to simply tmp/boot.bin. There are some preparations for creating a memory test tmp/boot.bin.memtest which would run from the SD card, but it did not go es easy es we would like, so it is not working.

Buildroot is the most basic Linux distribution available for Red Pitaya. It is also used to provide some sources which are dependencies for Userspace applications.

make build/uramdisk.image.gz

Debian OS instructions are detailed elsewhere.

Only instructions for the basic API are provided: Navigate to the api/rpbase folder and run:

make

The output of this process is the Red Pitaya librp.so library in api/lib directory.

To build apps free, follow the instructions given at apps-free README.md file.

Scpi server README can be found here