i2c read from the sensor

tprais_semestralka1/.gitignore

@@ -5,6 +5,7 @@ target/
 .zed/
 .helix/
 .env
+LPS22HB.PDF
 
 # These are backup files generated by rustfmt
 **/*.rs.bk

tprais_semestralka1/src/bin/main.rs

@@ -13,6 +13,10 @@ use embassy_net::{Runner, StackResources};
 use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
 use embassy_sync::signal::Signal;
 use embassy_time::{Duration, Instant, Timer};
+use esp_hal::{
+    i2c::master::{Config, I2c},
+    Async,
+};
 use projekt_final::mqtt::client::{mqtt_publish, mqtt_task};
 
 use esp_alloc as _;
@@ -59,14 +63,26 @@ esp_bootloader_esp_idf::esp_app_desc!();
 #[esp_hal_embassy::main]
 async fn main(spawner: Spawner) -> ! {
     esp_println::logger::init_logger_from_env();
-    info!("===============================");
     info!("ESP32 IoT Firmware Starting");
-    info!("===============================");
 
     let config = esp_hal::Config::default().with_cpu_clock(CpuClock::max());
     let peripherals = esp_hal::init(config);
     esp_alloc::heap_allocator!(size: 72 * 1024);
 
+    let i2c_config = Config::default().with_frequency(esp_hal::time::Rate::from_khz(400));
+    info!("Init I2C");
+    let mut i2c = I2c::new(peripherals.I2C0, i2c_config)
+        .expect("Failed to init i2c")
+        .with_sda(peripherals.GPIO21)
+        .with_scl(peripherals.GPIO22)
+        .into_async();
+
+    let mut buffer = [0u8; 1];
+    let SAD = 0x5C;
+    let SUB = &[0x0F];
+    i2c.write_read_async(SAD, SUB, &mut buffer).await.unwrap();
+    info!("WHO_AM_I: {:x}", buffer[0]);
+
     info!("Initializing WiFi...");
     let timg0 = TimerGroup::new(peripherals.TIMG0);
     let mut rng = Rng::new(peripherals.RNG);