diff --git a/hal_adc/Cargo.lock b/hal_adc/Cargo.lock
index bbaebed..812182e 100644
--- a/hal_adc/Cargo.lock
+++ b/hal_adc/Cargo.lock
@@ -2,6 +2,18 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "ahash"
+version = "0.8.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a15f179cd60c4584b8a8c596927aadc462e27f2ca70c04e0071964a73ba7a75"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+ "version_check",
+ "zerocopy",
+]
+
 [[package]]
 name = "aligned"
 version = "0.4.2"
@@ -26,6 +38,12 @@ version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c08606f8c3cbf4ce6ec8e28fb0014a2c086708fe954eaa885384a6165172e7e8"
 
+[[package]]
+name = "az"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b7e4c2464d97fe331d41de9d5db0def0a96f4d823b8b32a2efd503578988973"
+
 [[package]]
 name = "bare-metal"
 version = "0.2.5"
@@ -47,6 +65,12 @@ version = "0.13.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "46afbd2983a5d5a7bd740ccb198caf5b82f45c40c09c0eed36052d91cb92e719"
 
+[[package]]
+name = "bitfield"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d7e60934ceec538daadb9d8432424ed043a904d8e0243f3c6446bce549a46ac"
+
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -87,7 +111,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ec610d8f49840a5b376c69663b6369e71f4b34484b9b2eb29fb918d92516cb9"
 dependencies = [
  "bare-metal",
- "bitfield",
+ "bitfield 0.13.2",
  "critical-section",
  "embedded-hal 0.2.7",
  "volatile-register",
@@ -110,16 +134,7 @@ checksum = "e37549a379a9e0e6e576fd208ee60394ccb8be963889eebba3ffe0980364f472"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
-]
-
-[[package]]
-name = "cortex-m-semihosting"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c23234600452033cc77e4b761e740e02d2c4168e11dbf36ab14a0f58973592b0"
-dependencies = [
- "cortex-m",
+ "syn 2.0.107",
 ]
 
 [[package]]
@@ -149,7 +164,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "strsim",
- "syn",
+ "syn 2.0.107",
 ]
 
 [[package]]
@@ -160,7 +175,7 @@ checksum = "fc34b93ccb385b40dc71c6fceac4b2ad23662c7eeb248cf10d529b7e055b6ead"
 dependencies = [
  "darling_core",
  "quote",
- "syn",
+ "syn 2.0.107",
 ]
 
 [[package]]
@@ -192,7 +207,7 @@ dependencies = [
  "proc-macro-error2",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.107",
 ]
 
 [[package]]
@@ -214,29 +229,6 @@ dependencies = [
  "defmt 1.0.1",
 ]
 
-[[package]]
-name = "defmt-test"
-version = "0.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1c1e67ff0e1c6b1a9540a1a3e04454658faacdd188c91987c444d56e469d7dea"
-dependencies = [
- "cortex-m-rt",
- "cortex-m-semihosting",
- "defmt 0.3.100",
- "defmt-test-macros",
-]
-
-[[package]]
-name = "defmt-test-macros"
-version = "0.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fe5520fd36862f281c026abeaab153ebbc001717c29a9b8e5ba9704d8f3a879d"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "document-features"
 version = "0.2.11"
@@ -273,6 +265,7 @@ checksum = "06070468370195e0e86f241c8e5004356d696590a678d47d6676795b2e439c6b"
 dependencies = [
  "cortex-m",
  "critical-section",
+ "defmt 1.0.1",
  "document-features",
  "embassy-executor-macros",
  "embassy-executor-timer-queue",
@@ -287,7 +280,7 @@ dependencies = [
  "darling",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.107",
 ]
 
 [[package]]
@@ -323,6 +316,17 @@ dependencies = [
  "defmt 0.3.100",
 ]
 
+[[package]]
+name = "embassy-net-driver-channel"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b7b2739fbcf6cd206ae08779c7d709087b16577d255f2ea4a45bc4bbbf305b3f"
+dependencies = [
+ "embassy-futures",
+ "embassy-net-driver",
+ "embassy-sync",
+]
+
 [[package]]
 name = "embassy-stm32"
 version = "0.4.0"
@@ -340,7 +344,6 @@ dependencies = [
  "defmt 1.0.1",
  "document-features",
  "embassy-embedded-hal",
- "embassy-executor",
  "embassy-futures",
  "embassy-hal-internal",
  "embassy-net-driver",
@@ -373,6 +376,28 @@ dependencies = [
  "volatile-register",
 ]
 
+[[package]]
+name = "embassy-stm32u575zi-examples"
+version = "0.1.0"
+dependencies = [
+ "cortex-m",
+ "cortex-m-rt",
+ "defmt 1.0.1",
+ "defmt-rtt",
+ "embassy-executor",
+ "embassy-futures",
+ "embassy-stm32",
+ "embassy-sync",
+ "embassy-time",
+ "embassy-usb",
+ "embedded-graphics",
+ "embedded-hal 1.0.0",
+ "heapless",
+ "micromath",
+ "panic-probe",
+ "tinybmp",
+]
+
 [[package]]
 name = "embassy-sync"
 version = "0.7.2"
@@ -424,6 +449,23 @@ dependencies = [
  "heapless",
 ]
 
+[[package]]
+name = "embassy-usb"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc4462e48b19a4f401a11901bdd981aab80c6a826608016a0bdc73cbbab31954"
+dependencies = [
+ "defmt 1.0.1",
+ "embassy-futures",
+ "embassy-net-driver-channel",
+ "embassy-sync",
+ "embassy-usb-driver",
+ "embedded-io-async",
+ "heapless",
+ "ssmarshal",
+ "usbd-hid",
+]
+
 [[package]]
 name = "embassy-usb-driver"
 version = "0.2.0"
@@ -455,6 +497,29 @@ dependencies = [
  "nb 1.1.0",
 ]
 
+[[package]]
+name = "embedded-graphics"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0649998afacf6d575d126d83e68b78c0ab0e00ca2ac7e9b3db11b4cbe8274ef0"
+dependencies = [
+ "az",
+ "byteorder",
+ "embedded-graphics-core",
+ "float-cmp",
+ "micromath",
+]
+
+[[package]]
+name = "embedded-graphics-core"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba9ecd261f991856250d2207f6d8376946cd9f412a2165d3b75bc87a0bc7a044"
+dependencies = [
+ "az",
+ "byteorder",
+]
+
 [[package]]
 name = "embedded-hal"
 version = "0.2.7"
@@ -524,6 +589,21 @@ dependencies = [
  "embedded-storage",
 ]
 
+[[package]]
+name = "encode_unicode"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a357d28ed41a50f9c765dbfe56cbc04a64e53e5fc58ba79fbc34c10ef3df831f"
+
+[[package]]
+name = "float-cmp"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "98de4bbd547a563b716d8dfa9aad1cb19bfab00f4fa09a6a4ed21dbcf44ce9c4"
+dependencies = [
+ "num-traits",
+]
+
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -569,6 +649,15 @@ dependencies = [
  "byteorder",
 ]
 
+[[package]]
+name = "hashbrown"
+version = "0.13.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "43a3c133739dddd0d2990f9a4bdf8eb4b21ef50e4851ca85ab661199821d510e"
+dependencies = [
+ "ahash",
+]
+
 [[package]]
 name = "heapless"
 version = "0.8.0"
@@ -591,6 +680,18 @@ version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f5e54036fe321fd421e10d732f155734c4e4afd610dd556d9a82833ab3ee0bed"
 
+[[package]]
+name = "log"
+version = "0.4.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34080505efa8e45a4b816c349525ebe327ceaa8559756f0356cba97ef3bf7432"
+
+[[package]]
+name = "micromath"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3c8dda44ff03a2f238717214da50f65d5a53b45cd213a7370424ffdb6fae815"
+
 [[package]]
 name = "nb"
 version = "0.1.3"
@@ -615,6 +716,12 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "once_cell"
+version = "1.21.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
+
 [[package]]
 name = "panic-probe"
 version = "1.0.0"
@@ -637,6 +744,12 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
+[[package]]
+name = "portable-atomic"
+version = "1.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f84267b20a16ea918e43c6a88433c2d54fa145c92a811b5b047ccbe153674483"
+
 [[package]]
 name = "proc-macro-error-attr2"
 version = "2.0.0"
@@ -656,7 +769,7 @@ dependencies = [
  "proc-macro-error-attr2",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.107",
 ]
 
 [[package]]
@@ -704,12 +817,6 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b328e2cb950eeccd55b7f55c3a963691455dcd044cfb5354f0c5e68d2c2d6ee2"
 
-[[package]]
-name = "semihosting"
-version = "0.1.20"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3e1c7d2b77d80283c750a39c52f1ab4d17234e8f30bca43550f5b2375f41d5f"
-
 [[package]]
 name = "semver"
 version = "0.9.0"
@@ -725,6 +832,45 @@ version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 
+[[package]]
+name = "serde"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a8e94ea7f378bd32cbbd37198a4a91436180c5bb472411e48b5ec2e2124ae9e"
+dependencies = [
+ "serde_core",
+]
+
+[[package]]
+name = "serde_core"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41d385c7d4ca58e59fc732af25c3983b67ac852c1a25000afe1175de458b67ad"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d540f220d3187173da220f885ab66608367b6574e925011a9353e4badda91d79"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.107",
+]
+
+[[package]]
+name = "ssmarshal"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3e6ad23b128192ed337dfa4f1b8099ced0c2bf30d61e551b65fda5916dbb850"
+dependencies = [
+ "encode_unicode",
+ "serde",
+]
+
 [[package]]
 name = "stable_deref_trait"
 version = "1.2.1"
@@ -757,29 +903,23 @@ dependencies = [
  "defmt 0.3.100",
 ]
 
-[[package]]
-name = "stm32u5-blinky"
-version = "0.1.0"
-dependencies = [
- "cortex-m",
- "cortex-m-rt",
- "defmt 1.0.1",
- "defmt-rtt",
- "defmt-test",
- "embassy-executor",
- "embassy-stm32",
- "embassy-time",
- "embedded-hal 1.0.0",
- "panic-probe",
- "semihosting",
-]
-
 [[package]]
 name = "strsim"
 version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
 
+[[package]]
+name = "syn"
+version = "1.0.109"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
 [[package]]
 name = "syn"
 version = "2.0.107"
@@ -808,7 +948,16 @@ checksum = "3ff15c8ecd7de3849db632e14d18d2571fa09dfc5ed93479bc4485c7a517c913"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.107",
+]
+
+[[package]]
+name = "tinybmp"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df43af2cb7b369009aa14144959bb4f2720ab62034c9073242f2d3a186c2edb6"
+dependencies = [
+ "embedded-graphics",
 ]
 
 [[package]]
@@ -817,12 +966,65 @@ version = "1.0.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f63a545481291138910575129486daeaf8ac54aee4387fe7906919f7830c7d9d"
 
+[[package]]
+name = "usb-device"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "98816b1accafbb09085168b90f27e93d790b4bfa19d883466b5e53315b5f06a6"
+dependencies = [
+ "heapless",
+ "portable-atomic",
+]
+
+[[package]]
+name = "usbd-hid"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6f291ab53d428685cc780f08a2eb9d5d6ff58622db2b36e239a4f715f1e184c"
+dependencies = [
+ "serde",
+ "ssmarshal",
+ "usb-device",
+ "usbd-hid-macros",
+]
+
+[[package]]
+name = "usbd-hid-descriptors"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0eee54712c5d778d2fb2da43b1ce5a7b5060886ef7b09891baeb4bf36910a3ed"
+dependencies = [
+ "bitfield 0.14.0",
+]
+
+[[package]]
+name = "usbd-hid-macros"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb573c76e7884035ac5e1ab4a81234c187a82b6100140af0ab45757650ccda38"
+dependencies = [
+ "byteorder",
+ "hashbrown",
+ "log",
+ "proc-macro2",
+ "quote",
+ "serde",
+ "syn 1.0.109",
+ "usbd-hid-descriptors",
+]
+
 [[package]]
 name = "vcell"
 version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "77439c1b53d2303b20d9459b1ade71a83c716e3f9c34f3228c00e6f185d6c002"
 
+[[package]]
+name = "version_check"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
+
 [[package]]
 name = "void"
 version = "1.0.2"
@@ -837,3 +1039,23 @@ checksum = "de437e2a6208b014ab52972a27e59b33fa2920d3e00fe05026167a1c509d19cc"
 dependencies = [
  "vcell",
 ]
+
+[[package]]
+name = "zerocopy"
+version = "0.8.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0894878a5fa3edfd6da3f88c4805f4c8558e2b996227a3d864f47fe11e38282c"
+dependencies = [
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.8.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "88d2b8d9c68ad2b9e4340d7832716a4d21a22a1154777ad56ea55c51a9cf3831"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.107",
+]
diff --git a/hal_adc/Cargo.toml b/hal_adc/Cargo.toml
index 6e0cf00..8360bd2 100644
--- a/hal_adc/Cargo.toml
+++ b/hal_adc/Cargo.toml
@@ -1,43 +1,57 @@
 [package]
-# TODO(1) fix `authors` and `name` if you didn't use `cargo-generate`
-authors = ["Priec <filippriec@gmail.com>"]
-name = "stm32u5-blinky"
 edition = "2024"
+name = "embassy-stm32u575zi-examples"
 version = "0.1.0"
-
+license = "MIT OR Apache-2.0"
+publish = false
+authors = ["Priec <filippriec@gmail.com>"]
 
 [dependencies]
-cortex-m = { version = "0.7", features = ["critical-section-single-core"] }
-cortex-m-rt = "0.7"
-defmt = "1.0"
-defmt-rtt = "1.0"
+# Embassy core crates from crates.io (no relative paths)
+embassy-stm32 = { version = "0.4.0", features = [
+    "defmt",
+    "stm32u575zi",
+    "time-driver-any",
+] }
+embassy-sync = { version = "0.7.2", features = ["defmt"] }
+embassy-executor = { version = "0.9.1", features = [
+    "arch-cortex-m",
+    "executor-thread",
+    "defmt",
+] }
+embassy-time = { version = "0.5.0", features = [
+    "defmt",
+    "defmt-timestamp-uptime",
+    "tick-hz-32_768",
+] }
+embassy-usb = { version = "0.5.1", features = ["defmt"] }
+embassy-futures = { version = "0.1.2" }
+
+# Logging and panic behavior
+defmt = "1.0.1"
+defmt-rtt = "1.0.0"
 panic-probe = { version = "1.0", features = ["print-defmt"] }
-embassy-stm32 = { version = "0.4.0", features = ["stm32u575zi", "time-driver-tim1", "defmt", "low-power", "memory-x"] }
-embassy-time = "0.5.0"
-semihosting = "0.1.20"
+
+# MCU + HAL utilities
+cortex-m = { version = "0.7", features = ["inline-asm", "critical-section-single-core"] }
+cortex-m-rt = "0.7"
 embedded-hal = "1.0.0"
-embassy-executor = { version = "0.9.1", features = ["arch-cortex-m", "executor-thread"] }
+heapless = { version = "0.8", default-features = false }
+embedded-graphics = "0.8.1"
+tinybmp = "0.6.0"
+micromath = "2.0.0"
 
-[dev-dependencies]
-defmt-test = "0.3"
+[features]
+## Allow building secure binaries if TrustZone is enabled
+trustzone-secure = ["embassy-stm32/trustzone-secure"]
 
-# cargo build/run
-[profile.dev]
-# default is opt-level = '0', but that makes very
-# verbose machine code
-opt-level = 's'
-# trade compile speed for slightly better optimisations
-codegen-units = 1
-
-# cargo build/run --release
 [profile.release]
-# default is opt-level = '3', but that makes quite
-# verbose machine code
-opt-level = 's'
-# trade compile speed for slightly better optimisations
-codegen-units = 1
-# Use Link Time Optimisations to further inline things across
-# crates
-lto = 'fat'
-# Leave the debug symbols in (default is no debug info)
+lto = "fat"
+opt-level = "s"
 debug = 2
+codegen-units = 1
+
+[package.metadata.embassy]
+build = [
+  { target = "thumbv8m.main-none-eabihf", artifact-dir = "out/examples/stm32u5" }
+]
diff --git a/hal_adc/Makefile b/hal_adc/Makefile
new file mode 100644
index 0000000..dfa5ac1
--- /dev/null
+++ b/hal_adc/Makefile
@@ -0,0 +1,23 @@
+TARGET = thumbv8m.main-none-eabihf
+CHIP = STM32U575ZI
+BIN = stm32u5-blinky
+MODE ?= release
+TARGET_DIR = target/$(TARGET)/$(MODE)
+ELF = $(TARGET_DIR)/$(BIN)
+PROBE = probe-rs
+
+.PHONY: all build flash clean empty
+
+all: build
+
+build:
+	cargo build --$(MODE)
+
+flash: build
+	$(PROBE) run --chip $(CHIP) $(ELF)
+
+empty:
+	$(PROBE) erase --chip $(CHIP)
+
+clean:
+	cargo clean
diff --git a/hal_adc/openocd-u5.cfg b/hal_adc/openocd-u5.cfg
new file mode 100644
index 0000000..5ac6db7
--- /dev/null
+++ b/hal_adc/openocd-u5.cfg
@@ -0,0 +1,4 @@
+source [find interface/stlink.cfg]
+transport select hla_swd
+source [find target/stm32u5x.cfg]
+reset_config srst_only srst_nogate connect_assert_srst
diff --git a/hal_adc/src/lib.rs b/hal_adc/src/lib.rs
index deac2a0..f01d8a6 100644
--- a/hal_adc/src/lib.rs
+++ b/hal_adc/src/lib.rs
@@ -1,11 +1,6 @@
-#![no_main]
 #![no_std]
 
 use defmt_rtt as _; // global logger
-
-// TODO(5) adjust HAL import
-// use some_hal as _; // memory layout
-
 use panic_probe as _;
 
 // same panicking *behavior* as `panic-probe` but doesn't print a panic message
@@ -15,32 +10,9 @@ fn panic() -> ! {
     cortex_m::asm::udf()
 }
 
-/// Terminates the application and makes a semihosting-capable debug tool exit
-/// with status code 0.
-pub fn exit() -> ! {
-    semihosting::process::exit(0);
-}
-
-/// Hardfault handler.
-///
-/// Terminates the application and makes a semihosting-capable debug tool exit
-/// with an error. This seems better than the default, which is to spin in a
-/// loop.
+/// HardFault exit handler
 #[cortex_m_rt::exception]
 unsafe fn HardFault(_frame: &cortex_m_rt::ExceptionFrame) -> ! {
-    semihosting::process::exit(1);
-}
-
-// defmt-test 0.3.0 has the limitation that this `#[tests]` attribute can only be used
-// once within a crate. the module can be in any file but there can only be at most
-// one `#[tests]` module in this library crate
-#[cfg(test)]
-#[defmt_test::tests]
-mod unit_tests {
-    use defmt::assert;
-
-    #[test]
-    fn it_works() {
-        assert!(true)
-    }
+    cortex_m::asm::bkpt(); // stay under debugger rather than exit semihosting
+    loop {}
 }
diff --git a/hal_rng/Makefile b/hal_rng/Makefile
new file mode 100644
index 0000000..dfa5ac1
--- /dev/null
+++ b/hal_rng/Makefile
@@ -0,0 +1,23 @@
+TARGET = thumbv8m.main-none-eabihf
+CHIP = STM32U575ZI
+BIN = stm32u5-blinky
+MODE ?= release
+TARGET_DIR = target/$(TARGET)/$(MODE)
+ELF = $(TARGET_DIR)/$(BIN)
+PROBE = probe-rs
+
+.PHONY: all build flash clean empty
+
+all: build
+
+build:
+	cargo build --$(MODE)
+
+flash: build
+	$(PROBE) run --chip $(CHIP) $(ELF)
+
+empty:
+	$(PROBE) erase --chip $(CHIP)
+
+clean:
+	cargo clean
diff --git a/hal_test/.cargo/config.toml b/hal_test/.cargo/config.toml
index 793e2c8..c5c1552 100644
--- a/hal_test/.cargo/config.toml
+++ b/hal_test/.cargo/config.toml
@@ -1,22 +1,11 @@
-[target.'cfg(all(target_arch = "arm", target_os = "none"))']
-runner = ["probe-rs", "run", "--chip", "STM32U575ZI", "--log-format=oneline"]
-
-rustflags = [
-  "-C", "linker=flip-link",
-  "-C", "link-arg=-Tlink.x",
-  "-C", "link-arg=-Tdefmt.x",
-  "-C", "link-arg=--nmagic",
-]
-
 [build]
 target = "thumbv8m.main-none-eabihf"
 
 [target.thumbv8m.main-none-eabihf]
-runner = "probe-rs run --chip STM32U575ZI"
+runner = "probe-rs run --chip STM32U575ZITxQ"
 
-[alias]
-rb = "run --bin"
-rrb = "run --release --bin"
-
-[env]
-DEFMT_LOG = "info"
+rustflags = [
+  "-C", "linker=rust-lld",
+  "-C", "link-arg=-Tlink.x",   # provided by cortex-m-rt
+  "-C", "link-arg=--nmagic",
+]
diff --git a/hal_test/Cargo.lock b/hal_test/Cargo.lock
index a3c15a8..00eb822 100644
--- a/hal_test/Cargo.lock
+++ b/hal_test/Cargo.lock
@@ -2,6 +2,18 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "ahash"
+version = "0.8.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a15f179cd60c4584b8a8c596927aadc462e27f2ca70c04e0071964a73ba7a75"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+ "version_check",
+ "zerocopy",
+]
+
 [[package]]
 name = "aligned"
 version = "0.4.2"
@@ -26,6 +38,12 @@ version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c08606f8c3cbf4ce6ec8e28fb0014a2c086708fe954eaa885384a6165172e7e8"
 
+[[package]]
+name = "az"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b7e4c2464d97fe331d41de9d5db0def0a96f4d823b8b32a2efd503578988973"
+
 [[package]]
 name = "bare-metal"
 version = "0.2.5"
@@ -48,16 +66,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "46afbd2983a5d5a7bd740ccb198caf5b82f45c40c09c0eed36052d91cb92e719"
 
 [[package]]
-name = "bitflags"
-version = "1.3.2"
+name = "bitfield"
+version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+checksum = "2d7e60934ceec538daadb9d8432424ed043a904d8e0243f3c6446bce549a46ac"
 
 [[package]]
 name = "bitflags"
-version = "2.9.4"
+version = "2.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2261d10cca569e4643e526d8dc2e62e433cc8aba21ab764233731f8d369bf394"
+checksum = "812e12b5285cc515a9c72a5c1d3b6d46a19dac5acfef5265968c166106e31dd3"
 
 [[package]]
 name = "block-device-driver"
@@ -87,7 +105,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ec610d8f49840a5b376c69663b6369e71f4b34484b9b2eb29fb918d92516cb9"
 dependencies = [
  "bare-metal",
- "bitfield",
+ "bitfield 0.13.2",
  "critical-section",
  "embedded-hal 0.2.7",
  "volatile-register",
@@ -110,16 +128,7 @@ checksum = "e37549a379a9e0e6e576fd208ee60394ccb8be963889eebba3ffe0980364f472"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
-]
-
-[[package]]
-name = "cortex-m-semihosting"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c23234600452033cc77e4b761e740e02d2c4168e11dbf36ab14a0f58973592b0"
-dependencies = [
- "cortex-m",
+ "syn 2.0.107",
 ]
 
 [[package]]
@@ -149,7 +158,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "strsim",
- "syn",
+ "syn 2.0.107",
 ]
 
 [[package]]
@@ -160,81 +169,7 @@ checksum = "fc34b93ccb385b40dc71c6fceac4b2ad23662c7eeb248cf10d529b7e055b6ead"
 dependencies = [
  "darling_core",
  "quote",
- "syn",
-]
-
-[[package]]
-name = "defmt"
-version = "0.3.100"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0963443817029b2024136fc4dd07a5107eb8f977eaf18fcd1fdeb11306b64ad"
-dependencies = [
- "defmt 1.0.1",
-]
-
-[[package]]
-name = "defmt"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "548d977b6da32fa1d1fda2876453da1e7df63ad0304c8b3dae4dbe7b96f39b78"
-dependencies = [
- "bitflags 1.3.2",
- "defmt-macros",
-]
-
-[[package]]
-name = "defmt-macros"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d4fc12a85bcf441cfe44344c4b72d58493178ce635338a3f3b78943aceb258e"
-dependencies = [
- "defmt-parser",
- "proc-macro-error2",
- "proc-macro2",
- "quote",
- "syn",
-]
-
-[[package]]
-name = "defmt-parser"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "10d60334b3b2e7c9d91ef8150abfb6fa4c1c39ebbcf4a81c2e346aad939fee3e"
-dependencies = [
- "thiserror",
-]
-
-[[package]]
-name = "defmt-rtt"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b2cac3b8a5644a9e02b75085ebad3b6deafdbdbdec04bb25086523828aa4dfd1"
-dependencies = [
- "critical-section",
- "defmt 1.0.1",
-]
-
-[[package]]
-name = "defmt-test"
-version = "0.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1c1e67ff0e1c6b1a9540a1a3e04454658faacdd188c91987c444d56e469d7dea"
-dependencies = [
- "cortex-m-rt",
- "cortex-m-semihosting",
- "defmt 0.3.100",
- "defmt-test-macros",
-]
-
-[[package]]
-name = "defmt-test-macros"
-version = "0.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fe5520fd36862f281c026abeaab153ebbc001717c29a9b8e5ba9704d8f3a879d"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
+ "syn 2.0.107",
 ]
 
 [[package]]
@@ -252,7 +187,6 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "554e3e840696f54b4c9afcf28a0f24da431c927f4151040020416e7393d6d0d8"
 dependencies = [
- "defmt 1.0.1",
  "embassy-futures",
  "embassy-hal-internal",
  "embassy-sync",
@@ -287,7 +221,7 @@ dependencies = [
  "darling",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.107",
 ]
 
 [[package]]
@@ -310,7 +244,6 @@ checksum = "95285007a91b619dc9f26ea8f55452aa6c60f7115a4edc05085cd2bd3127cd7a"
 dependencies = [
  "cortex-m",
  "critical-section",
- "defmt 1.0.1",
  "num-traits",
 ]
 
@@ -319,8 +252,16 @@ name = "embassy-net-driver"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "524eb3c489760508f71360112bca70f6e53173e6fe48fc5f0efd0f5ab217751d"
+
+[[package]]
+name = "embassy-net-driver-channel"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b7b2739fbcf6cd206ae08779c7d709087b16577d255f2ea4a45bc4bbbf305b3f"
 dependencies = [
- "defmt 0.3.100",
+ "embassy-futures",
+ "embassy-net-driver",
+ "embassy-sync",
 ]
 
 [[package]]
@@ -331,16 +272,14 @@ checksum = "0d972eab325cc96afee98f80a91ca6b00249b6356dc0fdbff68b70c200df9fae"
 dependencies = [
  "aligned",
  "bit_field",
- "bitflags 2.9.4",
+ "bitflags",
  "block-device-driver",
  "cfg-if",
  "cortex-m",
  "cortex-m-rt",
  "critical-section",
- "defmt 1.0.1",
  "document-features",
  "embassy-embedded-hal",
- "embassy-executor",
  "embassy-futures",
  "embassy-hal-internal",
  "embassy-net-driver",
@@ -381,11 +320,10 @@ checksum = "73974a3edbd0bd286759b3d483540f0ebef705919a5f56f4fc7709066f71689b"
 dependencies = [
  "cfg-if",
  "critical-section",
- "defmt 1.0.1",
  "embedded-io-async",
  "futures-core",
  "futures-sink",
- "heapless",
+ "heapless 0.8.0",
 ]
 
 [[package]]
@@ -396,7 +334,6 @@ checksum = "f4fa65b9284d974dad7a23bb72835c4ec85c0b540d86af7fc4098c88cff51d65"
 dependencies = [
  "cfg-if",
  "critical-section",
- "defmt 1.0.1",
  "document-features",
  "embassy-time-driver",
  "embedded-hal 0.2.7",
@@ -421,7 +358,23 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "80e2ee86063bd028a420a5fb5898c18c87a8898026da1d4c852af2c443d0a454"
 dependencies = [
  "embassy-executor-timer-queue",
- "heapless",
+ "heapless 0.8.0",
+]
+
+[[package]]
+name = "embassy-usb"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc4462e48b19a4f401a11901bdd981aab80c6a826608016a0bdc73cbbab31954"
+dependencies = [
+ "embassy-futures",
+ "embassy-net-driver-channel",
+ "embassy-sync",
+ "embassy-usb-driver",
+ "embedded-io-async",
+ "heapless 0.8.0",
+ "ssmarshal",
+ "usbd-hid",
 ]
 
 [[package]]
@@ -430,7 +383,6 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "17119855ccc2d1f7470a39756b12068454ae27a3eabb037d940b5c03d9c77b7a"
 dependencies = [
- "defmt 1.0.1",
  "embedded-io-async",
 ]
 
@@ -441,7 +393,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "288751f8eaa44a5cf2613f13cee0ca8e06e6638cb96e897e6834702c79084b23"
 dependencies = [
  "critical-section",
- "defmt 1.0.1",
  "embassy-sync",
  "embassy-usb-driver",
 ]
@@ -455,6 +406,29 @@ dependencies = [
  "nb 1.1.0",
 ]
 
+[[package]]
+name = "embedded-graphics"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0649998afacf6d575d126d83e68b78c0ab0e00ca2ac7e9b3db11b4cbe8274ef0"
+dependencies = [
+ "az",
+ "byteorder",
+ "embedded-graphics-core",
+ "float-cmp",
+ "micromath",
+]
+
+[[package]]
+name = "embedded-graphics-core"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba9ecd261f991856250d2207f6d8376946cd9f412a2165d3b75bc87a0bc7a044"
+dependencies = [
+ "az",
+ "byteorder",
+]
+
 [[package]]
 name = "embedded-hal"
 version = "0.2.7"
@@ -495,9 +469,6 @@ name = "embedded-io"
 version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "edd0f118536f44f5ccd48bcb8b111bdc3de888b58c74639dfb034a357d0f206d"
-dependencies = [
- "defmt 0.3.100",
-]
 
 [[package]]
 name = "embedded-io-async"
@@ -505,7 +476,6 @@ version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3ff09972d4073aa8c299395be75161d582e7629cd663171d62af73c8d50dba3f"
 dependencies = [
- "defmt 0.3.100",
  "embedded-io",
 ]
 
@@ -524,6 +494,21 @@ dependencies = [
  "embedded-storage",
 ]
 
+[[package]]
+name = "encode_unicode"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a357d28ed41a50f9c765dbfe56cbc04a64e53e5fc58ba79fbc34c10ef3df831f"
+
+[[package]]
+name = "float-cmp"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "98de4bbd547a563b716d8dfa9aad1cb19bfab00f4fa09a6a4ed21dbcf44ce9c4"
+dependencies = [
+ "num-traits",
+]
+
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -560,6 +545,26 @@ dependencies = [
  "pin-utils",
 ]
 
+[[package]]
+name = "hal_test"
+version = "0.1.0"
+dependencies = [
+ "cortex-m",
+ "cortex-m-rt",
+ "embassy-executor",
+ "embassy-futures",
+ "embassy-stm32",
+ "embassy-sync",
+ "embassy-time",
+ "embassy-usb",
+ "embedded-graphics",
+ "embedded-hal 1.0.0",
+ "heapless 0.9.1",
+ "micromath",
+ "panic-halt",
+ "tinybmp",
+]
+
 [[package]]
 name = "hash32"
 version = "0.3.1"
@@ -569,6 +574,15 @@ dependencies = [
  "byteorder",
 ]
 
+[[package]]
+name = "hashbrown"
+version = "0.13.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "43a3c133739dddd0d2990f9a4bdf8eb4b21ef50e4851ca85ab661199821d510e"
+dependencies = [
+ "ahash",
+]
+
 [[package]]
 name = "heapless"
 version = "0.8.0"
@@ -579,6 +593,16 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "heapless"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1edcd5a338e64688fbdcb7531a846cfd3476a54784dcb918a0844682bc7ada5"
+dependencies = [
+ "hash32",
+ "stable_deref_trait",
+]
+
 [[package]]
 name = "ident_case"
 version = "1.0.1"
@@ -591,6 +615,18 @@ version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f5e54036fe321fd421e10d732f155734c4e4afd610dd556d9a82833ab3ee0bed"
 
+[[package]]
+name = "log"
+version = "0.4.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34080505efa8e45a4b816c349525ebe327ceaa8559756f0356cba97ef3bf7432"
+
+[[package]]
+name = "micromath"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3c8dda44ff03a2f238717214da50f65d5a53b45cd213a7370424ffdb6fae815"
+
 [[package]]
 name = "nb"
 version = "0.1.3"
@@ -616,14 +652,16 @@ dependencies = [
 ]
 
 [[package]]
-name = "panic-probe"
+name = "once_cell"
+version = "1.21.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
+
+[[package]]
+name = "panic-halt"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd402d00b0fb94c5aee000029204a46884b1262e0c443f166d86d2c0747e1a1a"
-dependencies = [
- "cortex-m",
- "defmt 1.0.1",
-]
+checksum = "a513e167849a384b7f9b746e517604398518590a9142f4846a32e3c2a4de7b11"
 
 [[package]]
 name = "pin-project-lite"
@@ -638,26 +676,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
 [[package]]
-name = "proc-macro-error-attr2"
-version = "2.0.0"
+name = "portable-atomic"
+version = "1.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "96de42df36bb9bba5542fe9f1a054b8cc87e172759a1868aa05c1f3acc89dfc5"
-dependencies = [
- "proc-macro2",
- "quote",
-]
-
-[[package]]
-name = "proc-macro-error2"
-version = "2.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11ec05c52be0a07b08061f7dd003e7d7092e0472bc731b4af7bb1ef876109802"
-dependencies = [
- "proc-macro-error-attr2",
- "proc-macro2",
- "quote",
- "syn",
-]
+checksum = "f84267b20a16ea918e43c6a88433c2d54fa145c92a811b5b047ccbe153674483"
 
 [[package]]
 name = "proc-macro2"
@@ -704,12 +726,6 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b328e2cb950eeccd55b7f55c3a963691455dcd044cfb5354f0c5e68d2c2d6ee2"
 
-[[package]]
-name = "semihosting"
-version = "0.1.20"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3e1c7d2b77d80283c750a39c52f1ab4d17234e8f30bca43550f5b2375f41d5f"
-
 [[package]]
 name = "semver"
 version = "0.9.0"
@@ -725,6 +741,45 @@ version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 
+[[package]]
+name = "serde"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a8e94ea7f378bd32cbbd37198a4a91436180c5bb472411e48b5ec2e2124ae9e"
+dependencies = [
+ "serde_core",
+]
+
+[[package]]
+name = "serde_core"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41d385c7d4ca58e59fc732af25c3983b67ac852c1a25000afe1175de458b67ad"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d540f220d3187173da220f885ab66608367b6574e925011a9353e4badda91d79"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.107",
+]
+
+[[package]]
+name = "ssmarshal"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3e6ad23b128192ed337dfa4f1b8099ced0c2bf30d61e551b65fda5916dbb850"
+dependencies = [
+ "encode_unicode",
+ "serde",
+]
+
 [[package]]
 name = "stable_deref_trait"
 version = "1.2.1"
@@ -754,23 +809,6 @@ checksum = "6fd8ec3a292a0d9fc4798416a61b21da5ae50341b2e7b8d12e662bf305366097"
 dependencies = [
  "cortex-m",
  "cortex-m-rt",
- "defmt 0.3.100",
-]
-
-[[package]]
-name = "stm32u5-blinky"
-version = "0.1.0"
-dependencies = [
- "cortex-m",
- "cortex-m-rt",
- "defmt 1.0.1",
- "defmt-rtt",
- "defmt-test",
- "embassy-stm32",
- "embassy-time",
- "embedded-hal 1.0.0",
- "panic-probe",
- "semihosting",
 ]
 
 [[package]]
@@ -781,9 +819,9 @@ checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
 
 [[package]]
 name = "syn"
-version = "2.0.106"
+version = "1.0.109"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ede7c438028d4436d71104916910f5bb611972c5cfd7f89b8300a8186e6fada6"
+checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -791,23 +829,23 @@ dependencies = [
 ]
 
 [[package]]
-name = "thiserror"
-version = "2.0.17"
+name = "syn"
+version = "2.0.107"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f63587ca0f12b72a0600bcba1d40081f830876000bb46dd2337a3051618f4fc8"
-dependencies = [
- "thiserror-impl",
-]
-
-[[package]]
-name = "thiserror-impl"
-version = "2.0.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3ff15c8ecd7de3849db632e14d18d2571fa09dfc5ed93479bc4485c7a517c913"
+checksum = "2a26dbd934e5451d21ef060c018dae56fc073894c5a7896f882928a76e6d081b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "unicode-ident",
+]
+
+[[package]]
+name = "tinybmp"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df43af2cb7b369009aa14144959bb4f2720ab62034c9073242f2d3a186c2edb6"
+dependencies = [
+ "embedded-graphics",
 ]
 
 [[package]]
@@ -816,12 +854,65 @@ version = "1.0.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f63a545481291138910575129486daeaf8ac54aee4387fe7906919f7830c7d9d"
 
+[[package]]
+name = "usb-device"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "98816b1accafbb09085168b90f27e93d790b4bfa19d883466b5e53315b5f06a6"
+dependencies = [
+ "heapless 0.8.0",
+ "portable-atomic",
+]
+
+[[package]]
+name = "usbd-hid"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6f291ab53d428685cc780f08a2eb9d5d6ff58622db2b36e239a4f715f1e184c"
+dependencies = [
+ "serde",
+ "ssmarshal",
+ "usb-device",
+ "usbd-hid-macros",
+]
+
+[[package]]
+name = "usbd-hid-descriptors"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0eee54712c5d778d2fb2da43b1ce5a7b5060886ef7b09891baeb4bf36910a3ed"
+dependencies = [
+ "bitfield 0.14.0",
+]
+
+[[package]]
+name = "usbd-hid-macros"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb573c76e7884035ac5e1ab4a81234c187a82b6100140af0ab45757650ccda38"
+dependencies = [
+ "byteorder",
+ "hashbrown",
+ "log",
+ "proc-macro2",
+ "quote",
+ "serde",
+ "syn 1.0.109",
+ "usbd-hid-descriptors",
+]
+
 [[package]]
 name = "vcell"
 version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "77439c1b53d2303b20d9459b1ade71a83c716e3f9c34f3228c00e6f185d6c002"
 
+[[package]]
+name = "version_check"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
+
 [[package]]
 name = "void"
 version = "1.0.2"
@@ -836,3 +927,23 @@ checksum = "de437e2a6208b014ab52972a27e59b33fa2920d3e00fe05026167a1c509d19cc"
 dependencies = [
  "vcell",
 ]
+
+[[package]]
+name = "zerocopy"
+version = "0.8.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0894878a5fa3edfd6da3f88c4805f4c8558e2b996227a3d864f47fe11e38282c"
+dependencies = [
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.8.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "88d2b8d9c68ad2b9e4340d7832716a4d21a22a1154777ad56ea55c51a9cf3831"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.107",
+]
diff --git a/hal_test/Cargo.toml b/hal_test/Cargo.toml
index 2962bab..ed1226b 100644
--- a/hal_test/Cargo.toml
+++ b/hal_test/Cargo.toml
@@ -1,42 +1,24 @@
 [package]
-# TODO(1) fix `authors` and `name` if you didn't use `cargo-generate`
 authors = ["Priec <filippriec@gmail.com>"]
-name = "stm32u5-blinky"
+name = "hal_test"
 edition = "2024"
 version = "0.1.0"
 
 
 [dependencies]
-cortex-m = { version = "0.7", features = ["critical-section-single-core"] }
-cortex-m-rt = "0.7"
-defmt = "1.0"
-defmt-rtt = "1.0"
-panic-probe = { version = "1.0", features = ["print-defmt"] }
-embassy-stm32 = { version = "0.4.0", features = ["stm32u575zi", "time-driver-tim1", "defmt", "low-power", "memory-x"] }
-embassy-time = "0.5.0"
-semihosting = "0.1.20"
+cortex-m = { version = "0.7.7", features = ["inline-asm", "critical-section-single-core"] }
+cortex-m-rt = "0.7.5"
+panic-halt = "1.0.0"
+
+embassy-executor = { version = "0.9.1", features = ["arch-cortex-m", "executor-thread"] }
+embassy-futures = "0.1.2"
+embassy-stm32 = { version = "0.4.0", features = ["unstable-pac", "stm32u575zi", "time-driver-any", "memory-x"] }
+embassy-sync = "0.7.2"
+embassy-time = { version = "0.5.0", features = ["tick-hz-32_768"] }
+embassy-usb = "0.5.1"
+
 embedded-hal = "1.0.0"
-
-[dev-dependencies]
-defmt-test = "0.3"
-
-# cargo build/run
-[profile.dev]
-# default is opt-level = '0', but that makes very
-# verbose machine code
-opt-level = 's'
-# trade compile speed for slightly better optimisations
-codegen-units = 1
-
-# cargo build/run --release
-[profile.release]
-# default is opt-level = '3', but that makes quite
-# verbose machine code
-opt-level = 's'
-# trade compile speed for slightly better optimisations
-codegen-units = 1
-# Use Link Time Optimisations to further inline things across
-# crates
-lto = 'fat'
-# Leave the debug symbols in (default is no debug info)
-debug = 2
+embedded-graphics = "0.8.1"
+heapless = { version = "0.9.1", default-features = false }
+micromath = "2.1.0"
+tinybmp = "0.6.0"
diff --git a/hal_test/Makefile b/hal_test/Makefile
new file mode 100644
index 0000000..bf6595f
--- /dev/null
+++ b/hal_test/Makefile
@@ -0,0 +1,20 @@
+TARGET = thumbv8m.main-none-eabihf
+CHIP = STM32U575ZI
+BIN = main
+MODE ?= release
+ELF = target/$(TARGET)/$(MODE)/$(BIN)
+PROBE = probe-rs
+
+.PHONY: all build flash empty
+
+all: build flash
+
+build:
+	cargo build --target $(TARGET) --$(MODE)
+
+flash: build
+	$(PROBE) run --chip $(CHIP) $(ELF)
+
+empty:
+	$(PROBE) erase --chip $(CHIP)
+
diff --git a/hal_test/memory.x b/hal_test/memory.x
deleted file mode 100644
index 89f96e1..0000000
--- a/hal_test/memory.x
+++ /dev/null
@@ -1,13 +0,0 @@
-/* memory.x - STM32U575ZITxQ memory layout */
-
-/* Flash: 2 MB starting at 0x08000000 */
-/* SRAM1 + SRAM2 + SRAM3 total 786 KB starting at 0x20000000 */
-
-MEMORY
-{
-  FLASH (rx)  : ORIGIN = 0x08000000, LENGTH = 2048K
-  RAM   (xrw) : ORIGIN = 0x20000000, LENGTH = 786K
-}
-
-/* provide stack start symbol (end of RAM) */
-_stack_start = ORIGIN(RAM) + LENGTH(RAM);
diff --git a/hal_test/src/bin/main.rs b/hal_test/src/bin/main.rs
index f76a673..6e93254 100644
--- a/hal_test/src/bin/main.rs
+++ b/hal_test/src/bin/main.rs
@@ -1,30 +1,24 @@
-// src/bin/main.rs
-
 #![no_std]
 #![no_main]
 
-use defmt_rtt as _;
+use embassy_executor::Spawner;
 use embassy_stm32::gpio::{Level, Output, Speed};
+use embassy_time::{Duration, Timer};
+use embassy_stm32::init;
 use embassy_stm32::Config;
-use embassy_time::Delay;
-use embedded_hal::delay::DelayNs;
-use panic_probe as _;
+use panic_halt as _;
 
-#[cortex_m_rt::entry]
-fn main() -> ! {
-    defmt::info!("Starting blinky on STM32U575ZI-Q...");
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let p = init(Config::default());
 
-    // Initialize peripherals with the default clock tree for STM32U5.
-    let p = embassy_stm32::init(Config::default());
-
-    // On‑board LED (PB7 on NUCLEO‑U575ZI‑Q)
-    let mut led = Output::new(p.PB7, Level::Low, Speed::Low);
-    let mut delay = Delay;
+    // The user LED on NUCLEO-U575ZI-Q is typically on port B, pin 0 (verify silkscreen)
+    let mut led = Output::new(p.PB0, Level::Low, Speed::Low);
 
     loop {
         led.set_high();
-        delay.delay_ms(500); // needs embedded_hal::delay::DelayNs in scope
+        Timer::after(Duration::from_millis(500)).await;
         led.set_low();
-        delay.delay_ms(500);
+        Timer::after(Duration::from_millis(500)).await;
     }
 }
diff --git a/hal_test/src/lib.rs b/hal_test/src/lib.rs
index deac2a0..0c9ac1a 100644
--- a/hal_test/src/lib.rs
+++ b/hal_test/src/lib.rs
@@ -1,46 +1 @@
-#![no_main]
 #![no_std]
-
-use defmt_rtt as _; // global logger
-
-// TODO(5) adjust HAL import
-// use some_hal as _; // memory layout
-
-use panic_probe as _;
-
-// same panicking *behavior* as `panic-probe` but doesn't print a panic message
-// this prevents the panic message being printed *twice* when `defmt::panic` is invoked
-#[defmt::panic_handler]
-fn panic() -> ! {
-    cortex_m::asm::udf()
-}
-
-/// Terminates the application and makes a semihosting-capable debug tool exit
-/// with status code 0.
-pub fn exit() -> ! {
-    semihosting::process::exit(0);
-}
-
-/// Hardfault handler.
-///
-/// Terminates the application and makes a semihosting-capable debug tool exit
-/// with an error. This seems better than the default, which is to spin in a
-/// loop.
-#[cortex_m_rt::exception]
-unsafe fn HardFault(_frame: &cortex_m_rt::ExceptionFrame) -> ! {
-    semihosting::process::exit(1);
-}
-
-// defmt-test 0.3.0 has the limitation that this `#[tests]` attribute can only be used
-// once within a crate. the module can be in any file but there can only be at most
-// one `#[tests]` module in this library crate
-#[cfg(test)]
-#[defmt_test::tests]
-mod unit_tests {
-    use defmt::assert;
-
-    #[test]
-    fn it_works() {
-        assert!(true)
-    }
-}