99 lines
3.1 KiB
Rust
99 lines
3.1 KiB
Rust
//! Heltec WiFi LoRa 32 V3 — stock UART (via CP2102 bridge).
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//!
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//! This is for unmodified V3 boards where USB goes through the CP2102
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//! bridge to UART0. The board appears as /dev/ttyUSB* (not ttyACM*).
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//!
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//! If you've done the hardware mod (solder R29/R3, disconnect CP2102),
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//! use the `heltec_v3` feature instead for native USB CDC-ACM support.
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use esp_hal::gpio::{Level, Output, OutputConfig};
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use super::esp32s3;
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use super::traits::{BoardParts, LoRaBoard};
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use crate::driver::simple_led::SimpleLed;
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use crate::hal::esp32s3 as mcu;
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pub use super::esp32s3::{create_display, DisplayDriver, DisplayParts, RadioDriver, RadioParts};
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pub type UartDriver = esp_hal::uart::Uart<'static, esp_hal::Async>;
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pub type LedDriver = SimpleLed<Output<'static>>;
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pub struct UartParts {
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pub driver: UartDriver,
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}
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pub struct Board {
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p: esp_hal::peripherals::Peripherals,
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}
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impl LoRaBoard for Board {
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const NAME: &'static str = "Heltec V3 (UART)";
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const TX_POWER_RANGE: (i8, i8) = (-9, 22);
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type RadioParts = RadioParts;
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type CommParts = UartParts;
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type DisplayParts = DisplayParts;
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type DisplayDriver = DisplayDriver;
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type LedDriver = LedDriver;
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fn init() -> Self {
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let p = esp_hal::init(esp_hal::Config::default());
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Self { p }
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}
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fn mac_address() -> [u8; 6] {
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mcu::mac_address()
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}
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fn into_parts(self) -> BoardParts<RadioParts, UartParts, DisplayParts, LedDriver> {
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let p = self.p;
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mcu::start_timer(p.TIMG0, p.SW_INTERRUPT);
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// Vext power: GPIO36, active LOW to enable peripherals.
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// Output has no Drop impl, so the pin stays configured for program lifetime.
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let _vext = Output::new(p.GPIO36, Level::Low, OutputConfig::default());
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let spi_bus = mcu::init_spi(p.SPI2, p.DMA_CH0, p.GPIO9, p.GPIO10, p.GPIO11);
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let radio = esp32s3::init_radio(
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spi_bus,
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p.GPIO8,
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p.GPIO12,
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p.GPIO14,
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p.GPIO13,
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lora_phy::sx126x::TcxoCtrlVoltage::Ctrl1V8,
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);
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use esp_hal::uart::{Config as UartConfig, Uart};
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let host = UartParts {
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driver: Uart::new(p.UART0, UartConfig::default())
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.expect("UART init")
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.with_tx(p.GPIO43)
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.with_rx(p.GPIO44)
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.into_async(),
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};
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// SSD1306 display reset: pulse GPIO21 low->high before I2C init.
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// Output has no Drop impl; pin stays HIGH after this block.
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let mut display_rst = Output::new(p.GPIO21, Level::Low, OutputConfig::default());
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esp_hal::delay::Delay::new().delay_millis(10);
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display_rst.set_high();
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esp_hal::delay::Delay::new().delay_millis(10);
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let i2c = mcu::init_i2c(p.I2C0, p.GPIO17, p.GPIO18);
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let display = Some(DisplayParts { i2c });
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// White LED on GPIO35
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let led_pin = Output::new(p.GPIO35, Level::Low, OutputConfig::default());
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let led = SimpleLed(led_pin);
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BoardParts {
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radio,
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host,
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display,
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led,
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mac: Self::mac_address(),
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}
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}
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}
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