Start or temperature logger exercise.

src/bare-metal/microcontrollers/examples/.cargo/config.toml

@@ -1,6 +1,6 @@
 [target.thumbv7m-none-eabi]
 rustflags = [
-    "-C", "link-arg=-Tlink.x",
+    "-C", "link-arg=-Tmemory.x",
 ]
 
 [build]

src/exercises/bare-metal/morning.md

@@ -0,0 +1,11 @@
+# Exercises
+
+We will read the temperature from an I2C temperature sensor, and log the readings to a serial port.
+
+<details>
+
+After looking at the exercises, you can look at the [solutions] provided.
+
+[solutions]: solutions-morning.md
+
+</details>

src/exercises/bare-metal/solutions-morning.md

@@ -0,0 +1,9 @@
+# Day 5A Morning Exercise
+
+## Temperature logger
+
+([back to exercise](temperature-logger.md))
+
+```rust
+{{#include temperature-logger/src/main.rs}}
+```

src/exercises/bare-metal/temperature-logger.md

@@ -0,0 +1,7 @@
+# Temperature logger
+
+We will read the temperature from an I2C temperature sensor, and log the readings to a serial port.
+
+```rust,should_panic
+{{#include temperature-logger/src/main.rs}}
+```

src/exercises/bare-metal/temperature-logger/Cargo.lock

@@ -0,0 +1,104 @@
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+# It is not intended for manual editing.
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+
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+ "syn",
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+ "unicode-ident",
+]
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+[[package]]
+name = "temperature-logger"
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+ "embedded-hal",
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src/exercises/bare-metal/temperature-logger/Cargo.toml

@@ -0,0 +1,11 @@
+[workspace]
+
+[package]
+name = "temperature-logger"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+cortex-m-rt = "0.7.0"
+embedded-hal = "0.2.6"
+panic-halt = "0.2.0"