From 4e017f989dfaa214ddcfcf5d662a34e1c8dcdb75 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juraj=20Mich=C3=A1lek?= <juraj.michalek@espressif.com>
Date: Mon, 14 Jul 2025 08:11:42 +0200
Subject: [PATCH] wip: add async-wifi support to S3-BOX

---
 examples/mcu-board-support/Cargo.toml        | 16 ++++++++++
 examples/mcu-board-support/esp32_s3_box_3.rs | 32 +++++++++++++++++++-
 2 files changed, 47 insertions(+), 1 deletion(-)

diff --git a/examples/mcu-board-support/Cargo.toml b/examples/mcu-board-support/Cargo.toml
index 04518a2b7..7c48fb232 100644
--- a/examples/mcu-board-support/Cargo.toml
+++ b/examples/mcu-board-support/Cargo.toml
@@ -75,6 +75,9 @@ esp32-s3-box-3 = [
   "esp-hal/esp32s3",
   "esp-hal/unstable",             # required for PSRAM support
   "esp-hal/psram",
+  "esp-wifi/esp32s3",
+  "static_cell",
+  "embassy-net",
   "embedded-hal",
   "embedded-hal-bus",
   "esp-alloc",
@@ -155,6 +158,19 @@ esp-hal = { version = "1.0.0-beta.0", optional = true }
 esp-alloc = { version = "0.7", optional = true }
 esp-println = { version = "0.14.0", features = ["log-04"], optional = true }
 esp-backtrace = { version = "0.16.0", optional = true, features = ["panic-handler", "println"] }
+esp-wifi = { version = "0.14.1", optional = true, features = [
+  "builtin-scheduler",
+  "esp-alloc",
+  "smoltcp",
+  "wifi",
+] }
+static_cell = { version = "2.1.0", optional = true, features = ["nightly"] }
+embassy-net = { version = "0.7.0", optional = true, features = [
+  "dhcpv4",
+  "medium-ethernet",
+  "tcp",
+  "udp",
+] }
 
 mipidsi = { version = "0.9.0", optional = true }
 embedded-graphics-core = { version = "0.4", optional = true }
diff --git a/examples/mcu-board-support/esp32_s3_box_3.rs b/examples/mcu-board-support/esp32_s3_box_3.rs
index 3412a3aa4..4f5e16ac6 100644
--- a/examples/mcu-board-support/esp32_s3_box_3.rs
+++ b/examples/mcu-board-support/esp32_s3_box_3.rs
@@ -58,8 +58,38 @@ pub fn init() {
     }))
     .expect("backend already initialized");
 }
+macro_rules! mk_static {
+    ($t:ty, $val:expr) => {{
+        static STATIC_CELL: static_cell::StaticCell<$t> = static_cell::StaticCell::new();
+        STATIC_CELL.init($val)
+    }};
+}
+
+use esp_wifi::wifi;
+use esp_wifi::{
+    wifi::{ClientConfiguration, Configuration, WifiController, WifiEvent, WifiState},
+    EspWifiController,
+};
+use esp_hal::{rng::Rng, timer::timg::TimerGroup};
+
+impl EspBackend {
+    pub fn wifi<'a>(&self, ssid: &'a str, password: &'a str) -> (wifi::WifiController<'a>, wifi::WifiDevice<'a>) {
+        // Initialize the Wi-Fi controller and device.
+        let peripherals = self.peripherals.borrow_mut().take().expect("Peripherals already taken");
+        let mut rng = Rng::new(peripherals.RNG);
+        let timer1 = TimerGroup::new(peripherals.TIMG0);
+        let wifi_init = &*mk_static!(
+            EspWifiController<'static>,
+            esp_wifi::init(timer1.timer0, rng.clone(), peripherals.RADIO_CLK).unwrap()
+        );
+        let (mut wifi_controller, interfaces) = esp_wifi::wifi::new(&wifi_init, peripherals.WIFI)
+            .expect("Failed to initialize WIFI controller");
+        let config = embassy_net::Config::dhcpv4(Default::default());
+        let wifi_device = interfaces.sta;
+        (wifi_controller, wifi_device)
+    }
+
 
-impl slint::platform::Platform for EspBackend {
     fn create_window_adapter(
         &self,
     ) -> Result<Rc<dyn slint::platform::WindowAdapter>, slint::PlatformError> {