OLED driver with shared SPI bus integrated

src/display/secondary_oled.rs

@@ -1 +1,34 @@
-// Secondary OLED module
+use ch1115::{Ch1115, Size128x64};
+use display_interface_spi::SPIInterface;
+use embedded_hal::digital::OutputPin as EhOutputPin;
+use embedded_hal_bus::spi::AtomicDevice;
+use embedded_hal_bus::util::AtomicCell;
+use esp_hal::delay::Delay;
+use esp_hal::gpio::{Level, Output, OutputConfig, OutputPin};
+
+pub type SecondaryOledDisplay<'a, BUS, RST, DC> =
+    Ch1115<SPIInterface<AtomicDevice<'a, BUS, Output<'a>, Delay>, DC>, RST, Size128x64>;
+
+pub fn init_secondary_oled_on_bus<'a, BUS, CS, RES, DC>(
+    spi_bus: &'a AtomicCell<BUS>,
+    cs: CS,
+    res: RES,
+    dc: DC,
+    delay: &mut Delay,
+) -> SecondaryOledDisplay<'a, BUS, RES, DC>
+where
+    BUS: embedded_hal::spi::SpiBus,
+    CS: OutputPin + 'static,
+    RES: EhOutputPin,
+    DC: EhOutputPin,
+{
+    let cs_pin = Output::new(cs, Level::High, OutputConfig::default());
+    let spi_dev = AtomicDevice::new(spi_bus, cs_pin, *delay).unwrap();
+    let interface = SPIInterface::new(spi_dev, dc);
+
+    let mut display = Ch1115::new(interface, res, Size128x64);
+
+    display.init(&mut Delay::new()).unwrap();
+
+    display
+}