Simple

src/main.rs

@@ -4,6 +4,7 @@
 use defmt::*;
 use embassy_executor::Spawner;
 use embassy_stm32::{Config, bind_interrupts, dma::InterruptHandler, i2c::{self, ErrorInterruptHandler, EventInterruptHandler, I2c}, peripherals::{DMA1_CH1, DMA1_CH2, I2C2}};
+use embassy_time::Timer;
 
 use defmt_rtt as _;
 use panic_probe as _;
@@ -14,24 +15,33 @@ bind_interrupts!(struct Irqs {
     I2C2_3 => EventInterruptHandler<I2C2>, ErrorInterruptHandler<I2C2>;
 });
 
+const ADDR: u8 = 0x1A;
+
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
-    let config = Config::default();
+    let p = embassy_stm32::init(Config::default());
-    let p = embassy_stm32::init(config);
 
     let mut i2c_cfg = i2c::Config::default();
-    // i2c_cfg.sda_pullup = true;
-    // i2c_cfg.scl_pullup = true;
     i2c_cfg.sda_pullup = false;
     i2c_cfg.scl_pullup = false;
-    let mut i2c = I2c::new(
+    let mut i2c = I2c::new(p.I2C2, p.PA7, p.PA6, p.DMA1_CH1, p.DMA1_CH2, Irqs, i2c_cfg);
-        p.I2C2,
-        p.PA7, p.PA6,
-        p.DMA1_CH1, p.DMA1_CH2,
-        Irqs,
-        i2c_cfg);
 
-    i2c.write(0x1A, &[0x02u8]).await.unwrap();
+    i2c.write(ADDR, &[0x01, 0x01]).await.unwrap();
+    Timer::after_millis(30).await;
 
-    info!("Success!");
+    // Start a PTAT measurement of block 0 (1<<3 | 1).
+    i2c.write(ADDR, &[0x01, 0x09]).await.unwrap();
+
+    let mut status = [0u8; 1];
+    while {
+        i2c.write_read(ADDR, &[0x02], &mut status).await.unwrap();
+        status[0] & 0x01 == 0
+    } {
+        Timer::after_millis(250).await;
+    }
+
+    let mut data = [0u8; 258];
+    i2c.write_read(ADDR, &[0x0A], &mut data).await.unwrap();
+
+    info!("Measurement: {:?}", data);
 }