feat(boards): LilyGo T-Beam S3 Supreme support

ESP32-S3 + SX1262 + SH1106 OLED + AXP2101 PMIC, native USB-C. The AXP2101 PMIC gates power to the LoRa chip and the OLED. Without its init sequence (ALDO3 = 3.3 V for LoRa, ALDO1 = 3.3 V for OLED) the SX1262 never responds on SPI and radio init fails. Pin map verified against MeshCore's variants/lilygo_tbeam_supreme_SX1262. PMIC lives on a dedicated I²C1 bus (SDA=42, SCL=41) separate from the SH1106 on I²C0 (SDA=17, SCL=18); I²C1 is used blocking for a one-shot init and then dropped. TCXO at 1.6 V via DIO3. New src/driver/axp.rs holds the AXP2101 init sequence — kept minimal (only the LoRa + OLED rails), since DongLoRa is a LoRa-over-USB bridge and every other rail (GPS, BME280, IMU, SD, batt ADC) is out of scope.
2026-04-23 10:29:48 -06:00
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+//! LilyGo T-Beam S3 Supreme — ESP32-S3 + SX1262 + SH1106 OLED + AXP2101 PMIC.
+//!
+//! Big-brother of the classic T-Beam: ESP32-S3-WROOM-1 module, SX1262 with a
+//! TCXO, 128×64 SH1106 OLED, AXP2101 PMIC on a dedicated I²C1 bus. Native USB
+//! (no UART bridge chip).
+//!
+//! The AXP2101 gates power to the SX1262 and OLED. Without its init sequence
+//! the LoRa chip never responds on SPI and `LoRa::new` fails.
+//!
+//! Pin map (verified from MeshCore variants/lilygo_tbeam_supreme_SX1262/):
+//!   LoRa SPI: SCK=12, MOSI=11, MISO=13, CS=10
+//!   LoRa ctl: RESET=5, DIO1=1, BUSY=4 (TCXO @ 1.6 V via DIO3)
+//!   OLED I²C: SDA=17, SCL=18, SH1106 @ 0x3C (I²C0)
+//!   PMIC I²C: SDA=42, SCL=41, AXP2101 @ 0x34 (I²C1, blocking, PMIC-only)
+//!   USB:      native USB-C on GPIO19/20 (fixed ESP32-S3 D+/D-)
+//!   LED:      GPIO6 (active HIGH indicator, reuses MeshCore's P_LORA_TX_LED)
+//!
+//! GPS / battery / IMU / SD / BME280 are unused — DongLoRa is a transparent
+//! LoRa-over-USB bridge. The PMIC init only enables ALDO1 (OLED) and ALDO3
+//! (LoRa); other rails are left at their AXP2101 power-on defaults.
+
+use esp_hal::gpio::{Level, Output, OutputConfig};
+use esp_hal::i2c::master::{Config as I2cConfig, I2c};
+use static_cell::StaticCell;
+
+use super::esp32s3;
+use super::traits::{BoardParts, LoRaBoard};
+use crate::driver::axp;
+use crate::driver::sh1106::Sh1106;
+use crate::driver::simple_led::SimpleLed;
+use crate::hal::esp32s3 as mcu;
+
+pub use super::esp32s3::{DisplayI2c, RadioDriver, RadioParts};
+
+// ── Concrete peripheral types ───────────────────────────────────────
+
+pub type DisplayDriver = Sh1106<DisplayI2c>;
+pub type UsbDriver = esp_hal::otg_fs::asynch::Driver<'static>;
+pub type LedDriver = SimpleLed<Output<'static>>;
+
+// ── Peripheral bundles ──────────────────────────────────────────────
+
+pub struct UsbParts {
+    pub driver: UsbDriver,
+}
+
+pub struct DisplayParts {
+    pub i2c: DisplayI2c,
+}
+
+// ── Display init ────────────────────────────────────────────────────
+
+pub async fn create_display(i2c: DisplayI2c) -> Option<DisplayDriver> {
+    let mut display = Sh1106::new(i2c, 0x3C);
+
+    embassy_time::Timer::after_millis(100).await;
+    if display.init().await.is_err() {
+        defmt::error!("SH1106 display init failed");
+        return None;
+    }
+    let _ = display.set_brightness(0xFF).await;
+    Some(display)
+}
+
+// ── Board init ──────────────────────────────────────────────────────
+
+pub struct Board {
+    p: esp_hal::peripherals::Peripherals,
+}
+
+impl LoRaBoard for Board {
+    const NAME: &'static str = "LilyGo T-Beam S3 Supreme";
+    const TX_POWER_RANGE: (i8, i8) = (-9, 22);
+
+    type RadioParts = RadioParts;
+    type CommParts = UsbParts;
+    type DisplayParts = DisplayParts;
+    type DisplayDriver = DisplayDriver;
+    type LedDriver = LedDriver;
+
+    fn init() -> Self {
+        let p = esp_hal::init(esp_hal::Config::default());
+        Self { p }
+    }
+
+    fn mac_address() -> [u8; 6] {
+        mcu::mac_address()
+    }
+
+    fn into_parts(self) -> BoardParts<RadioParts, UsbParts, DisplayParts, LedDriver> {
+        let p = self.p;
+
+        mcu::start_timer(p.TIMG0, p.SW_INTERRUPT);
+
+        // AXP2101 PMIC on I²C1 (SDA=42, SCL=41). Blocking, one-shot: we only
+        // need to flip the LoRa/OLED rails on, then the bus can be dropped.
+        // If this fails the LoRa chip stays unpowered — log and keep going so
+        // the rest of the boot path can still produce diagnostics.
+        {
+            let mut pmic = I2c::new(p.I2C1, I2cConfig::default())
+                .expect("I2C1 init")
+                .with_sda(p.GPIO42)
+                .with_scl(p.GPIO41);
+            if let Err(_e) = axp::axp2101_init_lora_oled(&mut pmic) {
+                defmt::error!("AXP2101 init failed — LoRa rail may be dead");
+            }
+        }
+        // Let ALDO1/ALDO3 settle before touching the LoRa SPI or OLED I²C.
+        esp_hal::delay::Delay::new().delay_millis(20);
+
+        // SPI2 for SX1262: SCK=12, MOSI=11, MISO=13
+        let spi_bus = mcu::init_spi(p.SPI2, p.DMA_CH0, p.GPIO12, p.GPIO11, p.GPIO13);
+
+        // SX1262: CS=10, RESET=5, DIO1=1, BUSY=4, TCXO @ 1.6 V via DIO3.
+        let radio = esp32s3::init_radio(
+            spi_bus,
+            p.GPIO10,
+            p.GPIO5,
+            p.GPIO1,
+            p.GPIO4,
+            lora_phy::sx126x::TcxoCtrlVoltage::Ctrl1V6,
+        );
+
+        // Native USB-C on GPIO19/20. Switches the internal USB PHY from
+        // Serial-JTAG to OTG.
+        let usb_inst = esp_hal::otg_fs::Usb::new(p.USB0, p.GPIO20, p.GPIO19);
+        static EP_OUT_BUF: StaticCell<[u8; 1024]> = StaticCell::new();
+        let ep_out_buf = EP_OUT_BUF.init([0u8; 1024]);
+        let host = UsbParts {
+            driver: esp_hal::otg_fs::asynch::Driver::new(
+                usb_inst,
+                ep_out_buf,
+                esp_hal::otg_fs::asynch::Config::default(),
+            ),
+        };
+
+        // I2C0 for SH1106 OLED: SDA=17, SCL=18 (async, handed to display task).
+        let i2c = mcu::init_i2c(p.I2C0, p.GPIO17, p.GPIO18);
+        let display = Some(DisplayParts { i2c });
+
+        // Activity LED on GPIO6 (active HIGH).
+        let led_pin = Output::new(p.GPIO6, Level::Low, OutputConfig::default());
+        let led = SimpleLed(led_pin);
+
+        BoardParts {
+            radio,
+            host,
+            display,
+            led,
+            mac: Self::mac_address(),
+        }
+    }
+}