Waveshare Panel Configuration Guide

Introduction

Overview

The scope of the document is to enable Waveshare panel on SL16xx platform. It provide details about the hardware connection required between the Waveshare panel and SL16xx platform and the software configuration changes required in device tree files (.dts extension).

Connection

1. Connect the 5V and Ground of the waveshare panel to the 40 pin connector. 5V to the Pin4 and Ground to Pin6 (GND).

   Refer the connection below:

2. Connect the 15-22 pin DSI cable as shown in the below connection.

Software Configuration

The Waveshare panel can be enabled by setting the dtbo variable, in U-Boot, to the correct device tree overlay.

	SL1620	SL1640	SL1680
DTS Overlay	myna2-ws-panel-overlay.dtbo	platypus-ws-panel-overlay.dtbo	dolphin-ws-panel-overlay.dtbo

Setting the device tree overlay requires booting into U-Boot and setting the dtbo variable to the required device tree overlay. See U-Boot Prompt with SUBoot for instructions on getting to the U-Boot prompt.

Once at the U-Boot prompt run the following commands to enable the Device Tree Overlay.

Set the dtbo variables:

=> setenv dtbo myna2-ws-panel-overlay.dtbo

Save the environment to the eMMC so that the new variable will persist across reboots.

=> saveenv
Saving Environment to MMC... Writing to redundant MMC(0)... OK

Optionally, confirm that the variable was correctly set.

=> printenv
altbootcmd=if test ${boot_slot}  = 1; then bootslot set b; bootcount reset;bootcount reset; run bootcmd; else bootslot set a; bootcount reset; bootcount reset; run bootcmd;  fi
autoload=n
baudrate=115200
bootcmd=bootmmc
bootcount=1
bootdelay=0
bootlimit=3
dtbo=myna2-ws-panel-overlay.dtbo
fdtcontroladdr=2172e190
preboot=show_logo;
upgrade_available=0
ver=U-Boot 2019.10 (Nov 21 2024 - 14:01:42 +0000)
Environment size: 407/65531 bytesboo

Finally, boot with the new overlay applied.

=> boot