Begin

.cargo/config.toml

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+[build]
+target = "thumbv6m-none-eabi"
+
+[env]
+DEFMT_LOG = "trace"
+
+[target.thumbv6m-none-eabi]
+runner = 'probe-rs run --chip STM32G0B1RE'
+rustflags = [
+	"-C", "link-arg=--nmagic",
+	"-C", "link-arg=-Tlink.x",
+	"-C", "link-arg=-Tdefmt.x",
+]

.gitignore

@@ -0,0 +1 @@
+/target

Cargo.toml

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+[package]
+name = "tts-test"
+version = "0.1.0"
+edition = "2024"
+
+[[bin]]
+name = "tts-test"
+test = false
+bench = false
+
+[dependencies]
+cortex-m = {
+	version = "0.7",
+        features = ["inline-asm", "critical-section-single-core"]
+}
+cortex-m-rt = "0.7"
+
+embassy-stm32 = {
+	version = "0.6",
+	features = [
+                 "rt",
+                 "defmt",
+                 "memory-x",
+                 "stm32g0b1re",
+                 "time-driver-any",
+                 "exti",
+                 "unstable-pac",
+                 "cyw43"
+        ],
+}
+embassy-executor = {
+	version = "0.10",
+	features = ["platform-cortex-m", "executor-thread", "defmt"],
+}
+embassy-time = {
+	version = "0.5",
+	features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"],
+}
+
+cyw43 = {
+	version = "0.7",
+        features = ["defmt"],
+}
+
+embedded-hal-bus = "0.3"
+embedded-can = "0.4"
+
+defmt = "1.1"
+defmt-rtt = "1.2"
+
+panic-probe = { version = "1.0", features = ["print-defmt"]}
+
+[profile.release]
+debug = 2

src/main.rs

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+#![no_main]
+#![no_std]
+
+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 defmt_rtt as _;
+use panic_probe as _;
+
+bind_interrupts!(struct Irqs {
+    DMA1_CHANNEL2_3 => InterruptHandler<DMA1_CH2>;
+    DMA1_CHANNEL1 => InterruptHandler<DMA1_CH1>;
+    I2C2_3 => EventInterruptHandler<I2C2>, ErrorInterruptHandler<I2C2>;
+});
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let config = 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(
+        p.I2C2,
+        p.PA7, p.PA6,
+        p.DMA1_CH1, p.DMA1_CH2,
+        Irqs,
+        i2c_cfg);
+
+    i2c.write(0x1A, &[0x02u8]).await.unwrap();
+
+    info!("Success!");
+}