rk3506b使用lvgl

关闭默认的UI

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/etc/init.d/S49weston stop
/etc/init.d/S50systemui stop
killall systemui weston lv_demo 2>/dev/null

原始SDK的LVGL 的 evdev 触摸设备设备名匹配规则比较严格，会导致无法使用触摸。

在不想修改代码的请款下可以执行以下命令来找到正确的触摸设备。

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export LV_EVENT_NAME=/dev/input/event0

之后就可以正常使用lv_demo程序了。并且lv_demo默认被编进固件，路径为/usr/bin/lv_demo

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lv_demo

后续修改了evdev.c代码，可以匹配上触摸节点。

以上就已经结束了。

以下不用看

补充一个保留系统默认 UI，但按命令一键切换到 lv_demo/再切回”的脚本

功能：

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demo：停 systemui/weston，启动 lv_demo
ui：停 lv_demo，恢复 weston + systemui
status：查看当前进程状态

建议部署步骤：

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在 SDK 根目录执行：.build.sh extra-parts
刷写 OEM 分区：.rkflash.sh oem

板子上使用：

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sh /oem/ui-switch.sh demo
sh /oem/ui-switch.sh ui
sh /oem/ui-switch.sh status
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#!/bin/sh
# One-key switch between default system UI and LVGL demo.
# Usage:
#   sh /oem/ui-switch.sh demo     # switch to lv_demo
#   sh /oem/ui-switch.sh ui       # switch back to system UI
#   sh /oem/ui-switch.sh status   # show process/service status

set -u

WESTON_INIT="/etc/init.d/S49weston"
SYSTEMUI_INIT="/etc/init.d/S50systemui"
LV_DEMO_LOG="/tmp/lv_demo.log"

log() {
    echo "[ui-switch] $*"
}

require_root() {
    if [ "$(id -u)" != "0" ]; then
        log "please run as root"
        exit 1
    fi
}

svc_stop() {
    _svc="$1"
    [ -x "$_svc" ] || return 0
    "$_svc" stop >/dev/null 2>&1 || true
}

svc_start() {
    _svc="$1"
    [ -x "$_svc" ] || return 0
    "$_svc" start >/dev/null 2>&1 || true
}

kill_if_running() {
    _name="$1"
    killall "$_name" >/dev/null 2>&1 || true
}

wait_wayland_ready() {
    # Keep same environment behavior as init scripts.
    [ -r /etc/profile ] && . /etc/profile

    _runtime_dir="${XDG_RUNTIME_DIR:-/run/user/0}"
    _sock="${_runtime_dir}/wayland-0"
    _i=0
    while [ ! -e "$_sock" ] && [ "$_i" -lt 80 ]; do
        sleep 0.1
        _i=$((_i + 1))
    done

    [ -e "$_sock" ]
}

to_demo() {
    log "switching to lv_demo..."

    svc_stop "$SYSTEMUI_INIT"
    svc_stop "$WESTON_INIT"

    kill_if_running systemui
    kill_if_running weston
    kill_if_running rk_demo
    kill_if_running lv_demo

    # Recommend cursor plane to reduce conflicts with primary plane.
    export LV_DRIVERS_SET_PLANE="${LV_DRIVERS_SET_PLANE:-CURSOR}"

    nohup lv_demo >"$LV_DEMO_LOG" 2>&1 &
    sleep 1

    if pidof lv_demo >/dev/null 2>&1; then
        log "lv_demo is running (log: $LV_DEMO_LOG)"
        return 0
    fi

    log "lv_demo failed to start, check: $LV_DEMO_LOG"
    return 1
}

to_ui() {
    log "switching back to default UI..."

    kill_if_running lv_demo
    kill_if_running rk_demo

    svc_start "$WESTON_INIT"

    if ! wait_wayland_ready; then
        log "warning: wayland socket not ready, continue to start systemui"
    fi

    svc_start "$SYSTEMUI_INIT"

    sleep 1
    if pidof systemui >/dev/null 2>&1; then
        log "systemui is running"
        return 0
    fi

    log "systemui may not be running, check: /var/log/weston.log"
    return 1
}

status() {
    echo "=== process status ==="
    ps -ef | grep -E "weston|systemui|lv_demo|rk_demo" | grep -v grep || true
    echo ""
    echo "=== service files ==="
    [ -x "$WESTON_INIT" ] && echo "ok: $WESTON_INIT" || echo "missing: $WESTON_INIT"
    [ -x "$SYSTEMUI_INIT" ] && echo "ok: $SYSTEMUI_INIT" || echo "missing: $SYSTEMUI_INIT"
}

usage() {
    cat <<EOF
Usage: sh /oem/ui-switch.sh {demo|ui|status}
  demo   stop default UI stack and run lv_demo
  ui     stop lv_demo and recover default UI stack
  status show running processes and service status
EOF
}

require_root

case "${1:-status}" in
    demo)
        to_demo
        ;;
    ui)
        to_ui
        ;;
    status)
        status
        ;;
    *)
        usage
        exit 1
        ;;
esac

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