darkberg/buildroot_ext_lichee_rv

Buildroot support for RISC-V Lichee RV hardware

Buildroot Externals for Lichee RV Dock

This adds support for the RISC-V based Lichee RV products to buildroot to allow you to easily build new systems. Buildroot has support for the main Nezha board, but it does not have built in support for the additional hardware on these boards. This package attempts to add support for all hardware.

Building an image

1. Download this package and the buildroot source in peer directories:

   +-- src
     |- buildroot
     |- buildroot_ext_lichee_rv
   

2. Patch buildroot until I get the updates to the bootloader accepted upstream or figure out how to patch it via the extensions:

   grant@NUC:~/src$ cd buildroot
   grant@NUC:~/src/buildroot$ patch -d . -p1 < ../buildroot_ext_lichee_rv/0001-fix-sun20i-d1-spl-in-buildroot.patch 
   patching file boot/sun20i-d1-spl/sun20i-d1-spl.hash
   patching file boot/sun20i-d1-spl/sun20i-d1-spl.mk
   grant@NUC:~/src/buildroot$ git diff
   diff --git a/boot/sun20i-d1-spl/sun20i-d1-spl.hash b/boot/sun20i-d1-spl/sun20i-d1-spl.hash
   deleted file mode 100644
   index 6ca60e5278..0000000000
   --- a/boot/sun20i-d1-spl/sun20i-d1-spl.hash
   +++ /dev/null
   @@ -1,2 +0,0 @@
   -# Locally computed
   -sha256  69063601239a7254fb72e486b138d88a6f2b5c645b24cdfe9792123f975d4a8f  sun20i-d1-spl-771192d0b3737798d7feca87263c8fa74a449787.tar.gz
   diff --git a/boot/sun20i-d1-spl/sun20i-d1-spl.mk b/boot/sun20i-d1-spl/sun20i-d1-spl.mk
   index 2462ce2322..1f1cd99b2d 100644
   --- a/boot/sun20i-d1-spl/sun20i-d1-spl.mk
   +++ b/boot/sun20i-d1-spl/sun20i-d1-spl.mk
   @@ -5,7 +5,7 @@
    ################################################################################
    
    # Commit on the 'mainline' branch
   -SUN20I_D1_SPL_VERSION = 771192d0b3737798d7feca87263c8fa74a449787
   +SUN20I_D1_SPL_VERSION = 525883d3721f4c4d78b498e780b44e85d0676abf
    SUN20I_D1_SPL_SITE = $(call github,smaeul,sun20i_d1_spl,$(SUN20I_D1_SPL_VERSION))
    SUN20I_D1_SPL_INSTALL_TARGET = NO
    SUN20I_D1_SPL_INSTALL_IMAGES = YES
   grant@NUC:~/src/buildroot$ 
   
   

3. Enter the buildroot directory, enable the external package, and grab a lichee rv configuration.

   For RV DOCK:

   grant@NUC:~/src/buildroot2$ make BR2_EXTERNAL=~/src/buildroot_ext_lichee_rv licheedock_defconfig
   

   For RV PANEL:

   grant@NUC:~/src/buildroot2$ make BR2_EXTERNAL=~/src/buildroot_ext_lichee_rv lichee86panel_defconfig
   

4. You will probably want to do some minimal configuration. For example adding dropbear for ssh access and nano so you don't need to use vi to edit files.

   make menuconfig

5. Build the system.

   make

6. Grab the image in output/images/sdcard.img and deploy it.

Disabling external package

1. If you want to remove the external package run make BR2_EXTERNAL= menuconfig

Connecting with Serial Console

You will want to have access to a serial console for initial configuration. Get a cheap UART adapter that support 3.3 Volt logic levels. I usually buy one that has a jumper to switch between 5 and 3.3 Volts.

    <USB A CONNECTOR>

                  +------+
		  | .  . |
		  | .  . |
		  | .  . | - GROUND
		  | .  . | - TX
		  | .  . | - RX
		  | .  . |
		  | .  . |
		  | .  . |
		  | .  . |
		  | .  . |
		  | .  . |
		  | .  . |
		  | .  . |
		  | .  . |
		  | .  . |
		  | .  . |
		  | .  . |
		  | .  . |
		  | .  . |
		  | .  . |
                  +------+
		  

    <HDMI CONNECTOR>

Remember that the TX on the board should be connected to the RX on the UART adapter, and the RX on the board should connect to the TX on the UART adapter!

Setting up wifi credentials

1. Connect to serial console

2. Generate a wpa configuration:

   # wpa_passphrase "MyNetwork" foobar88
   network={
           ssid="MyNetwork"
           #psk="foobar88"
           psk=67224fb26d73f404f3c12d2576bc9cb220d068318f9a44b97ad548f15d71058c
   }
   
   

3. Replace the network section of /etc/wpa_supplicant.conf on the Lichee RV.

   # cat /etc/wpa_supplicant.conf 
   ctrl_interface=/var/run/wpa_supplicant
   ap_scan=1
   
   network={
           ssid="MyNetwork"
           #psk="foobar88"
           psk=67224fb26d73f404f3c12d2576bc9cb220d068318f9a44b97ad548f15d71058c
   }
   

4. Reboot: /sbin/reboot

5. get the ip:

   # ifconfig
   lo        Link encap:Local Loopback  
             inet addr:127.0.0.1  Mask:255.0.0.0
             inet6 addr: ::1/128 Scope:Host
             UP LOOPBACK RUNNING  MTU:65536  Metric:1
             RX packets:0 errors:0 dropped:0 overruns:0 frame:0
             TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
             collisions:0 txqueuelen:1000 
             RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
   
   wlan0     Link encap:Ethernet  HWaddr 2C:05:47:35:8D:E1  
             inet addr:192.168.1.109  Bcast:192.168.1.255  Mask:255.255.255.0
             inet6 addr: fe80::2e05:47ff:fe35:8de1/64 Scope:Link
             UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
             RX packets:28 errors:0 dropped:4 overruns:0 frame:0
             TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
             collisions:0 txqueuelen:1000 
             RX bytes:5422 (5.2 KiB)  TX bytes:1904 (1.8 KiB)