Implement sensor reading

src/main.rs

@@ -1,26 +1,76 @@
+//! Example on how to read a 24C/24LC i2c eeprom.
+//!
+//! Connect SDA to P0.03, SCL to P0.04
+
 #![no_std]
 #![no_main]
 
-use defmt::info;
-use embassy_executor::Spawner;
-use embassy_nrf::gpio::{Level, Output, OutputDrive};
 use embassy_time::Timer;
-use {defmt_rtt as _, panic_probe as _};
 use nrf_softdevice::{raw, Softdevice};
 
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_nrf::twim::{self, Twim};
+use embassy_nrf::{bind_interrupts, peripherals};
+use {defmt_rtt as _, panic_probe as _};
+
+const ADDRESS: u8 = 0x44;
+
+bind_interrupts!(struct Irqs {
+    TWIM0_TWIS0_TWI0 => twim::InterruptHandler<peripherals::TWI0>;
+});
+
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
     let p = embassy_nrf::init(Default::default());
-    let mut led = Output::new(p.P0_20, Level::Low, OutputDrive::Standard);
 
-    info!("Starting blinky");
+    info!("Initializing TWI...");
+
+    let config = twim::Config::default();
+    let mut twi = Twim::new(p.TWI0, Irqs, p.P0_14, p.P0_13, config);
 
     loop {
-        led.set_high();
+        unwrap!(twi.blocking_write(ADDRESS, &mut [0xFD]));
+
         Timer::after_millis(300).await;
-        led.set_low();
-        Timer::after_millis(300).await;
-        info!("Blinked");
+
+        let mut buf = [0u8; 6];
+        unwrap!(twi.blocking_read(ADDRESS, &mut buf));
+
+        let temp_int = u16::from_be_bytes([buf[0], buf[1]]);
+        let temp_float: f32 = -45f32 + 175f32 * (temp_int as f32 / (2u32.pow(16) - 1) as f32);
+
+        let rh_int = u16::from_be_bytes([buf[3], buf[4]]);
+        let rh_float: f32 = -6f32 + 125f32 * (rh_int as f32 / (2u32.pow(16) - 1) as f32);
+        println!("temp_float: {}", temp_float);
+        println!("rh_float: {}", rh_float);
+
+        Timer::after_millis(1000).await;
     }
 }
 
+// #![no_std]
+// #![no_main]
+//
+// use defmt::info;
+// use embassy_executor::Spawner;
+// use embassy_nrf::gpio::{Level, Output, OutputDrive};
+// use embassy_time::Timer;
+// use nrf_softdevice::{raw, Softdevice};
+// use {defmt_rtt as _, panic_probe as _};
+//
+// #[embassy_executor::main]
+// async fn main(_spawner: Spawner) {
+//     let p = embassy_nrf::init(Default::default());
+//     let mut led = Output::new(p.P0_20, Level::Low, OutputDrive::Standard);
+//
+//     info!("Starting blinky");
+//
+//     loop {
+//         led.set_high();
+//         Timer::after_millis(300).await;
+//         led.set_low();
+//         Timer::after_millis(300).await;
+//         info!("Blinked");
+//     }
+// }