diff --git a/.gitignore b/.gitignore
index af83db9c987bf66de048234c56fba4b6a1597d46..7130f7edbb4baf9fff5c9eba940ce803005e1747 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
target
-.gdb_history
\ No newline at end of file
+.gdb_history
+itm.fifo
diff --git a/blinky-itm/.cargo/config b/blinky-itm/.cargo/config
new file mode 100644
index 0000000000000000000000000000000000000000..d62cf99daa78b9815bc34747230bfdfcc569a263
--- /dev/null
+++ b/blinky-itm/.cargo/config
@@ -0,0 +1,10 @@
+[target.thumbv7em-none-eabi]
+runner = 'arm-none-eabi-gdb'
+rustflags = [
+# "-C", "linker=arm-none-eabi-gcc",
+# "-C", "link-arg=-Wl,-Tlink.x",
+# "-C", "link-arg=-nostartfiles"
+ "-C", "link-arg=-Tlink.x"
+]
+[build]
+target = "thumbv7em-none-eabi"
diff --git a/blinky-itm/.gdbinit b/blinky-itm/.gdbinit
new file mode 100644
index 0000000000000000000000000000000000000000..0c4f8c87e3ae6ac7a9c138ce7bb262382ea1c124
--- /dev/null
+++ b/blinky-itm/.gdbinit
@@ -0,0 +1,21 @@
+target remote :3333
+
+# print demangled symbols by default
+set print asm-demangle on
+
+#monitor arm semihosting enable
+
+# # send captured ITM to the file itm.fifo
+# # (the microcontroller SWO pin must be connected to the programmer SWO pin)
+# # 8000000 must match the core clock frequency
+monitor tpiu config internal itm.fifo uart off 168000000
+
+# # OR: make the microcontroller SWO pin output compatible with UART (8N1)
+# # 2000000 is the frequency of the SWO pin
+# monitor tpiu config external uart off 8000000 2000000
+
+# # enable ITM port 0
+monitor itm port 0 on
+
+load
+step
diff --git a/blinky-itm/Cargo.lock b/blinky-itm/Cargo.lock
new file mode 100644
index 0000000000000000000000000000000000000000..b388ab1a55d8ceb4c5697aeb35f36c33d80a55a1
--- /dev/null
+++ b/blinky-itm/Cargo.lock
@@ -0,0 +1,202 @@
+[[package]]
+name = "aligned"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "bare-metal"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "blinky-itm"
+version = "0.0.1"
+dependencies = [
+ "cast 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m 0.5.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m-rt 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "embedded-hal 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "panic-abort 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "stm32f407g-disc 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "cast"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "cortex-m"
+version = "0.5.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "aligned 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bare-metal 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "volatile-register 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "cortex-m-rt"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cortex-m-rt-macros 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "r0 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "cortex-m-rt-macros"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 0.4.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "embedded-hal"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "nb 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "nb"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "panic-abort"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "proc-macro2"
+version = "0.4.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "quote"
+version = "0.6.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 0.4.19 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "r0"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "rand"
+version = "0.5.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rand_core 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "stm32f4"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bare-metal 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m 0.5.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m-rt 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vcell 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "stm32f407g-disc"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cortex-m 0.5.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m-rt 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "embedded-hal 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "stm32f4xx-hal 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "stm32f4xx-hal"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bare-metal 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cast 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m 0.5.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cortex-m-rt 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "embedded-hal 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nb 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "stm32f4 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "syn"
+version = "0.15.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 0.4.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "unicode-xid"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "vcell"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "void"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "volatile-register"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "vcell 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[metadata]
+"checksum aligned 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d39da9b88ae1a81c03c9c082b8db83f1d0e93914126041962af61034ab44c4a5"
+"checksum bare-metal 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "1bdcf9294ed648c7cd29b11db06ea244005aeef50ae8f605b1a3af2940bf8f92"
+"checksum cast 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "926013f2860c46252efceabb19f4a6b308197505082c609025aa6706c011d427"
+"checksum cortex-m 0.5.7 (registry+https://github.com/rust-lang/crates.io-index)" = "4573199c5b1e9b0eeae418b46f7c0af5fdf11b3057f83880810dfef68dd1dcb5"
+"checksum cortex-m-rt 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)" = "d86cfa89fa220d3cb7a41133693e2d302d18e9a632298ffb3738f175c8c12325"
+"checksum cortex-m-rt-macros 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "3139fdadccaa0db6fa96637678ced9b0b97e4f10047c9ab603d125048e107d1a"
+"checksum embedded-hal 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "26944677e4934eb5fb4025501dc0d6cdbcf6bfabd6200fcfee2e7e8eef8c0362"
+"checksum nb 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "69f380b5fe9fab8c0d7a6a99cda23e2cc0463bedb2cbc3aada0813b98496ecdc"
+"checksum panic-abort 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2c14a66511ed17b6a8b4256b868d7fd207836d891db15eea5195dbcaf87e630f"
+"checksum proc-macro2 0.4.19 (registry+https://github.com/rust-lang/crates.io-index)" = "ffe022fb8c8bd254524b0b3305906c1921fa37a84a644e29079a9e62200c3901"
+"checksum quote 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)" = "dd636425967c33af890042c483632d33fa7a18f19ad1d7ea72e8998c6ef8dea5"
+"checksum r0 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e2a38df5b15c8d5c7e8654189744d8e396bddc18ad48041a500ce52d6948941f"
+"checksum rand 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)" = "e464cd887e869cddcae8792a4ee31d23c7edd516700695608f5b98c67ee0131c"
+"checksum rand_core 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "edecf0f94da5551fc9b492093e30b041a891657db7940ee221f9d2f66e82eef2"
+"checksum stm32f4 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "9c9dd897c48dc34c0483a190715a0d4e0e805308fbefabcf941e4e2948d6f622"
+"checksum stm32f407g-disc 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "57197f804593fc9fd73af204996b347d5279946d9e3d555ff19f0b0090a680cc"
+"checksum stm32f4xx-hal 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2d4293bcaabb6a6a0993f7013f8bb17f9a115257c8e5d89e843e2af81d336855"
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+"checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
+"checksum vcell 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "45c297f0afb6928cd08ab1ff9d95e99392595ea25ae1b5ecf822ff8764e57a0d"
+"checksum void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
+"checksum volatile-register 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0d67cb4616d99b940db1d6bd28844ff97108b498a6ca850e5b6191a532063286"
diff --git a/blinky-itm/Cargo.toml b/blinky-itm/Cargo.toml
new file mode 100644
index 0000000000000000000000000000000000000000..7fe4e68e2d9a7112e42cb0b270519024d06abd63
--- /dev/null
+++ b/blinky-itm/Cargo.toml
@@ -0,0 +1,40 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g. crates.io) dependencies
+#
+# If you believe there's an error in this file please file an
+# issue against the rust-lang/cargo repository. If you're
+# editing this file be aware that the upstream Cargo.toml
+# will likely look very different (and much more reasonable)
+
+[package]
+name = "blinky-itm"
+version = "0.0.1"
+authors = ["Tim Docker<tim@dockerz.net>"]
+description = "A flashing light"
+keywords = ["arm", "cortex-m"]
+categories = ["embedded", "no-std"]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/timbod7/..."
+
+[dependencies.cast]
+version = "0.2.2"
+default-features = false
+
+[dependencies.stm32f407g-disc]
+version = "0.1.0"
+
+[dependencies.embedded-hal]
+version = "0.2.1"
+
+[dependencies.cortex-m]
+version = "0.5.7"
+
+[dependencies.cortex-m-rt]
+version = "0.6.4"
+
+[dependencies.panic-abort]
+version = "0.3.1"
diff --git a/blinky-itm/README.md b/blinky-itm/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..abd47cab276d7db16915373583a5ebf7ea24e6bb
--- /dev/null
+++ b/blinky-itm/README.md
@@ -0,0 +1,11 @@
+Run the binary on the stm32f407 discovery board as per normal. With
+the gdb configuration as in this directory, an itm.fifo file will be
+written.
+
+Run this command:
+
+```
+itmdump -F -f itm.fifo
+```
+
+to follow it.
diff --git a/blinky-itm/build.rs b/blinky-itm/build.rs
new file mode 100644
index 0000000000000000000000000000000000000000..98f603edca220793729c92ff608e25d6bf0e8e7e
--- /dev/null
+++ b/blinky-itm/build.rs
@@ -0,0 +1,18 @@
+use std::env;
+use std::fs::File;
+use std::io::Write;
+use std::path::PathBuf;
+
+fn main() {
+ // Put the linker script somewhere the linker can find it
+ let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+ File::create(out.join("memory.x"))
+ .unwrap()
+ .write_all(include_bytes!("memory.x"))
+ .unwrap();
+ println!("cargo:rustc-link-search={}", out.display());
+
+ // Only re-run the build script when memory.x is changed,
+ // instead of when any part of the source code changes.
+ println!("cargo:rerun-if-changed=memory.x");
+}
diff --git a/blinky-itm/memory.x b/blinky-itm/memory.x
new file mode 100644
index 0000000000000000000000000000000000000000..f4df782cdd2865f751f303e2994738324b0b254b
--- /dev/null
+++ b/blinky-itm/memory.x
@@ -0,0 +1,22 @@
+MEMORY
+{
+ /* NOTE K = KiBi = 1024 bytes */
+ FLASH : ORIGIN = 0x08000000, LENGTH = 256K
+ RAM : ORIGIN = 0x20000000, LENGTH = 40K
+}
+
+/* This is where the call stack will be allocated. */
+/* The stack is of the full descending type. */
+/* You may want to use this variable to locate the call stack and static
+ variables in different memory regions. Below is shown the default value */
+/* _stack_start = ORIGIN(RAM) + LENGTH(RAM); */
+
+/* You can use this symbol to customize the location of the .text section */
+/* If omitted the .text section will be placed right after the .vector_table
+ section */
+/* This is required only on microcontrollers that store some configuration right
+ after the vector table */
+/* _stext = ORIGIN(FLASH) + 0x400; */
+
+/* Size of the heap (in bytes) */
+/* _heap_size = 1024; */
diff --git a/blinky-itm/src/main.rs b/blinky-itm/src/main.rs
new file mode 100644
index 0000000000000000000000000000000000000000..b58e8c24d2c746857d404611b1b6394261b60acd
--- /dev/null
+++ b/blinky-itm/src/main.rs
@@ -0,0 +1,76 @@
+#![no_main]
+#![no_std]
+
+extern crate cortex_m;
+extern crate cortex_m_rt;
+extern crate panic_abort;
+
+extern crate stm32f407g_disc as board;
+extern crate embedded_hal as hal;
+
+use cortex_m_rt::entry;
+
+use board::hal::delay::Delay;
+use board::hal::prelude::*;
+use board::hal::stm32;
+use board::gpio;
+use board::gpio::gpiod::{PD12, PD13, PD14, PD15};
+
+use hal::digital::OutputPin;
+
+use cortex_m::iprintln;
+use cortex_m::peripheral::Peripherals;
+
+struct Leds {
+ green: PD12<gpio::Output<gpio::PushPull>>,
+ orange: PD13<gpio::Output<gpio::PushPull>>,
+ red: PD14<gpio::Output<gpio::PushPull>>,
+ blue: PD15<gpio::Output<gpio::PushPull>>,
+}
+
+#[entry]
+fn main() -> ! {
+ if let (Some(p), Some(cp)) = (stm32::Peripherals::take(), Peripherals::take()) {
+ let gpiod = p.GPIOD.split();
+ let mut itm = cp.ITM;
+
+ // Configure LED outputs
+ let mut leds = Leds {
+ green: gpiod.pd12.into_push_pull_output(),
+ orange: gpiod.pd13.into_push_pull_output(),
+ red: gpiod.pd14.into_push_pull_output(),
+ blue: gpiod.pd15.into_push_pull_output(),
+ };
+
+ // Constrain clock registers
+ let mut rcc = p.RCC.constrain();
+
+ // Configure clock to 168 MHz (i.e. the maximum) and freeze it
+ let clocks = rcc.cfgr.sysclk(168.mhz()).freeze();
+
+ // Get delay provider
+ let mut delay = Delay::new(cp.SYST, clocks);
+
+ iprintln!(&mut itm.stim[0], "start" );
+
+ loop {
+ // Turn LED on
+ leds.red.set_high();
+ iprintln!(&mut itm.stim[0], "on" );
+
+ // Delay twice for half a second due to limited timer resolution
+ delay.delay_ms(500_u16);
+ delay.delay_ms(500_u16);
+
+ // Turn LED off
+ leds.red.set_low();
+ iprintln!(&mut itm.stim[0], "off" );
+
+ // Delay twice for half a second due to limited timer resolution
+ delay.delay_ms(500_u16);
+ delay.delay_ms(500_u16);
+ }
+ }
+
+ loop {}
+}
\ No newline at end of file