fix various issues for esp32 (#3007)

* kconfig: Fix invalid dependancy in fsdrv

LV_USE_FS_* symbols are integers, instead of usual booleans.
We must treat them as such.

* ci: Get LVGL version from git tag

* docu: Update Espressif readme

* ci run apt update before installing

.github/workflows/esp_upload_component.yml

@@ -1,19 +1,23 @@
 name: Push LVGL release to Espressif Component Service
 
-# Upload on successful release
+# If the commit is tagged, it will be uploaded. Other scenario silently fail.
 on:
-  release:
+  push:
-    types:
+    branches:
-      - released
+      - master
 
 jobs:
   upload_components:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@master
-      - name: Upload component to component service
+        with:
+          submodules: "recursive"
+
+      - name: Upload component to component registry
         uses: espressif/github-actions/upload_components@master
         with:
           name: "lvgl"
+          version: "git"
           namespace: "lvgl"
           api_token: ${{ secrets.ESP_IDF_COMPONENT_API_TOKEN }}

Kconfig

@@ -843,21 +843,21 @@ menu "LVGL configuration"
             default 0
         config LV_FS_STDIO_PATH
             string "Set the working directory"
-            depends on LV_USE_FS_STDIO
+            depends on LV_USE_FS_STDIO != 0
 
         config LV_USE_FS_POSIX
             int "File system on top of posix API"
             default 0
         config LV_FS_POSIX_PATH
             string "Set the working directory"
-            depends on LV_USE_FS_POSIX
+            depends on LV_USE_FS_POSIX != 0
 
         config LV_USE_FS_WIN32
             int "File system on top of Win32 API"
             default 0
         config LV_FS_WIN32_PATH
             string "Set the working directory"
-            depends on LV_USE_FS_WIN32
+            depends on LV_USE_FS_WIN32 != 0
 
         config LV_USE_FS_FATFS
             int "File system on top of FatFS"

docs/get-started/espressif.md

@@ -3,45 +3,60 @@
 :github_url: |github_link_base|/get-started/espressif.md
 ```
 
-# Espressif (ESP32)
+# Espressif (ESP32 chip series)
-Since v7.7.1 LVGL includes a Kconfig file, so LVGL can be used as an ESP-IDF v4 component.
+LVGL can be used and configured as a standard [ESP-IDF](https://github.com/espressif/esp-idf) component.
 
-## Get the LVGL demo project for ESP32
+More information about ESP-IDF build system can be found [here](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/build-system.html).
 
-We've created [lv_port_esp32](https://github.com/lvgl/lv_port_esp32), a project using ESP-IDF and LVGL to show one of the demos from [lv_examples](https://github.com/lvgl/lv_examples).
+## LVGL demo project for ESP32
-You are able to configure the project to use one of the many supported display controllers, see [lvgl_esp32_drivers](https://github.com/lvgl/lvgl_esp32_drivers) for a complete list
-of supported display and indev (touch) controllers.
 
-## Use LVGL in your ESP32 project
+We've created [lv_port_esp32](https://github.com/lvgl/lv_port_esp32), a project using ESP-IDF and LVGL to show one of the demos from [lv_demos](https://github.com/lvgl/lv_demos).
+You can configure the project to use one of the many supported display controllers and targets (chips).
+
+See [lvgl_esp32_drivers](https://github.com/lvgl/lvgl_esp32_drivers) repository for a complete list
+of supported display and indev (touch) controllers and targets.
+
+## Using LVGL in your ESP-IDF project
 
 ### Prerequisites
 
-ESP-IDF v4 framework is the suggested version to use.
+ * ESP-IDF v4.1 and above
+ * ESP evaluation board with a display
 
-### Get LVGL
+### Obtaining LVGL
 
-It is suggested that you add LVGL as a "component" to your project. This component can be located inside a directory named "components" in the project root directory.
+__Option 1:__ git submodule
 
-When your project is a git repository you can include LVGL as a git submodule:
+Simply clone LVGL into your `project_root/components` directory and it will be automatically integrated into the project.
+If the project is a git repository you can include LVGL as a git submodule:
 
-```c
+```sh
 git submodule add https://github.com/lvgl/lvgl.git components/lvgl
 ```
 
 The above command will clone LVGL's main repository into the `components/lvgl` directory. LVGL includes a `CMakeLists.txt` file that sets some configuration options so you can use LVGL right away.
 
-When you are ready to configure LVGL, launch the configuration menu with `idf.py menuconfig` on your project root directory, go to `Component config` and then `LVGL configuration`.
+__Option 2:__ IDF Component Manager
 
-## Use lvgl_esp32_drivers in your project
+LVGL is also distributed through [IDF Component Manager](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/tools/idf-component-manager.html).
+It allows users to seamlessly integrate [LVGL component](https://components.espressif.com/component/lvgl/lvgl) into their project with following command:
 
-You can also add `lvgl_esp32_drivers` as a "component". This component can be located inside a directory named "components" on your project root directory.
+```sh
+idf.py add-dependency lvgl/lvgl>=8.*
+```
+
+During next project build, LVGL component will be fetched from the component registry and added to project build.
+
+### Configuration
+
+When you are ready to configure LVGL, launch the configuration menu with `idf.py menuconfig` in your project root directory, go to `Component config` and then `LVGL configuration`.
+
+## Using lvgl_esp32_drivers in ESP-IDF project
+
+You can also add `lvgl_esp32_drivers` as a "component". This component should be located inside a directory named "components" in your project root directory.
 
 When your project is a git repository you can include `lvgl_esp32_drivers` as a git submodule:
 
-```c
+```sh
 git submodule add https://github.com/lvgl/lvgl_esp32_drivers.git components/lvgl_esp32_drivers
 ```
-
-### Support for ESP32-S2
-
-Basic support for ESP32-S2 has been added into the `lvgl_esp32_drivers` repository.

idf_component.yml

@@ -1,3 +1,2 @@
-version: "8.0.2"
 description: LVGL - Light and Versatile Graphics Library
 url: https://github.com/lvgl/lvgl

scripts/install-prerequisites.sh

@@ -5,4 +5,5 @@
 # here, such as MicroPython and PC simulator packages.
 #
 # Note: This script is run by the CI workflows.
+sudo apt update
 sudo apt install gcc python3 libpng-dev ruby-full gcovr cmake