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redpitaya

This repository provides buildroot based support for redpitaya (12, 14, and 16 bits) board.

It uses the BR2_EXTERNAL mecanism to add this support in buildroot.

This support has been tested with the latest stable release of buildroot (2022.08).

How-to use it

Download

You need to download corresponding tarball:

wget https://buildroot.org/downloads/buildroot-2022.08.tar.gz

Configure environment

To add the support you need to source sourceme.ggm file to add BR2_EXTERNAL to your env (it's possible to add export BR2_EXTERNAL=/somewhere/redpitaya in .bashrc).

Now, in buildroot directory:

You can use for 14-bit Redpitaya

make redpitaya_defconfig

or for 16-bit Redpitaya

make redpitaya16_defconfig

or for real time extension of Linux for the 14-bit Redpitaya

make redpitaya_xenomai_defconfig

or for 12-bit Redpitaya

make redpitaya12_defconfig

to configure buildroot

build all

Now, with default, or modified, configuration, next step is to build everything (cross-compiler, u-boot, linux and filesystem):

make

flash the SD card

After build finished an sdcard.img is generated in output/images directory.

It's time to flash your SD card with this disk image by using:

sudo dd if=output/images/sdcard.img of=/dev/yourSdCard bs=4M

where /dev/yourSdCard is usually /dev/sdb or /dev/mmcblk0

NOTE: This step will destroy all current content of /dev/xxx. So, big care must be taken about this. dmesg will help you to verify the name of your SD card

Tweaks

IP address

By default, the redpitaya IP address is 192.168.0.10, to change this value /etc/network/interfaces must be updated. This file is located in the second partition of the SD card;

default configuration is:

auto eth0
iface eth0 inet static
    address 192.168.0.10
    netmask 255.255.255.0
    network 192.168.0.0
    broadcast 192.168.0.255
    gateway 192.168.0.2

For example, if you want to use 192.168.10.x network:

auto eth0
iface eth0 inet static
    address 192.168.10.10
    netmask 255.255.255.0
    network 192.168.10.0
    broadcast 192.168.10.255
    gateway 192.168.10.2

MAC address

ethernet MAC address is generates ramdomly (in fact it's always the same). If you have more than one redpitaya and you want to use an DHCP server to set the IP, the next line

ethaddr=xx:xx:xx:xx

has to be added in the uEnv.txt file, located in the first SD-card partition.

Note: a sticker with the Official MAC address is glued in the redpitaya ethernet connector.

Note

red_vivado_support directory contains basic files to add redpitaya support to vivado to select this board when creating a new project.