ESP32 Swift Example

Example of graphical application for ESP32-C3, ESP32-P4.

Read more about Swift for ESP32 at Espressif Developer Portal.

On-line Demo Simulation

Run the ESP32-P4 SDL3 Swift with Wokwi.com

Requirements

• Swift 6.1 - https://www.swift.org/install
• ESP-IDF 5.4 - https://github.com/espressif/esp-idf

Build

Configure build environment

source esp-idf/export.sh
export TOOLCHAINS=$(plutil -extract CFBundleIdentifier raw /Library/Developer/Toolchains/swift-DEVELOPMENT-SNAPSHOT-2024-10-30-a.xctoolchain/Info.plist)

Build for ESP32-P4-Function-Ev-Board

idf.py @boards/esp32_p4_function_ev_board.cfg flash monitor

Build for ESP32-C3-LcdKit

idf.py @boards/esp32_c3_lcdkit.cfg flash monitor

Build for ESP32-C6-DevKit

The configuration of this board is based on ESP-BSP Generic which allows configuration using menuconfig.

SPI Display configuration:

CONFIG_BSP_DISPLAY_ENABLED=y
CONFIG_BSP_DISPLAY_SCLK_GPIO=6
CONFIG_BSP_DISPLAY_MOSI_GPIO=7
CONFIG_BSP_DISPLAY_MISO_GPIO=-1
CONFIG_BSP_DISPLAY_CS_GPIO=20
CONFIG_BSP_DISPLAY_DC_GPIO=21
CONFIG_BSP_DISPLAY_RST_GPIO=3
CONFIG_BSP_DISPLAY_DRIVER_ILI9341=y

You can change the configuration by running:

idf.py @boards/esp32_c6_devkit.cfg menuconfig

idf.py @boards/esp32_c6_devkit.cfg flash monitor

Run simulation in VS Code

• Build the project, to get binaries for simulation.
• Install Wokwi for VS Code.
• Open file boards/esp32_.../diagram.json.
• Click Play button to start simulation.
• Click Pause button to freeze simulation and display states of GPIOs.

Credits

• Graphical assets: https://opengameart.org/content/platformer-tiles
• Font FreeSans.ttf: https://github.com/opensourcedesign/fonts/blob/master/gnu-freefont_freesans/FreeSans.ttf