diff --git a/.gitignore b/.gitignore
index 42bfd6f..26578c7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,4 @@
 cmake-build/
+build/
 ex/
+compile_commands.json
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c2dc03e..e277c70 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -84,8 +84,11 @@ target_include_directories(${PROJECT} PUBLIC
   ${CMAKE_CURRENT_SOURCE_DIR}/bsp/default/
 )
 
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra")
+
+add_custom_target(fix_db ALL WORKING_DIRECTORY ${OUTPUT_DIR}
+  COMMAND "${CMAKE_CURRENT_SOURCE_DIR}/scripts/fix_clang_db.py")
 
 if(FAMILY STREQUAL "rp2040")
   target_link_libraries(${PROJECT} pico_stdlib pico_unique_id hardware_spi
diff --git a/README.md b/README.md
index 9f4445a..1692f80 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@ Compilation is done using CMake:
 
 ```
 mkdir cmake-build && cd cmake-build
-cmake -DBOARD=raspberry_pi_pico -DFAMILIY=rp2040 -DCMAKE_BUILD_TYPE=RelWithDebInfo ..
+cmake -DBOARD=raspberry_pi_pico -DFAMILY=rp2040 -DCMAKE_BUILD_TYPE=RelWithDebInfo ..
 ```
 
 `BOARD` and `FAMILY` should correspond to those used in the TinyUSB `hw` folder,
@@ -54,7 +54,7 @@ the `-DUSE_SYSTEMWIDE_PICOSDK=On` flag to CMake, too.
 Other options are:
 * `-DPICO_NO_FLASH=[On|Off]`: store the binary in RAM only, useful for development.
 * `-DPICO_COPY_TO_RAM=[On|Off]`: write to flash, but always run from RAM
-* `-DUSE_USBCDC_FOR_STDIO=[On|Off]`: export an extra USB-CDC interface for debuggin
+* `-DUSE_USBCDC_FOR_STDIO=[On|Off]`: export an extra USB-CDC interface for debugging
 
 ## Usage
 
@@ -231,8 +231,9 @@ libco is licensed under the [ISC license](https://opensource.org/licenses/ISC)
 
 - [x] CMSIS-DAP JTAG implementation
 - [x] Flashrom/SPI support using Serprog
-  - [ ] Parallel ROM flashing support, too, by having the device switch into a
-        separate mode that temporarily disables all other IO protocols
+  - Parallel ROM flashing support, too, by having the device switch into a
+    separate mode that temporarily disables all other IO protocols
+    - Not enough IO, rip.
 - [x] UART with CTS/RTS flow control
   - [x] Needs configurable stuff as well, as some UART interfaces won't use this.
 - [x] Debug interface to send printf stuff directly to USB, instead of having
diff --git a/dmctl.py b/dmctl.py
index 6f85ce2..c29cadb 100755
--- a/dmctl.py
+++ b/dmctl.py
@@ -7,7 +7,7 @@ def auto_int(x):
     return int(x, 0)
 
 class RTOpt(NamedTuple):
-    type: bool
+    type: Callable[[Any], Any]
     optid: int
     desc: str
 
diff --git a/scripts/configure_dev.sh b/scripts/configure_dev.sh
new file mode 100755
index 0000000..e814bd3
--- /dev/null
+++ b/scripts/configure_dev.sh
@@ -0,0 +1,14 @@
+#!/bin/bash
+
+set -eo pipefail
+
+SCRIPTPATH="$(cd -- "$(dirname "$0")" >/dev/null 2>&1; pwd -P)"
+SRCPATH=$(readlink -e "$SCRIPTPATH/..")
+cd "$SRCPATH"
+[ -d "cmake-build" ] || mkdir cmake-build
+cd cmake-build
+
+set -x
+exec cmake -G Ninja -DBOARD=raspberry_pi_pico -DFAMILY=rp2040 -DCMAKE_BUILD_TYPE=RelWithDebInfo \
+    -DPICO_NO_FLASH=On -DUSE_USBCDC_FOR_STDIO=On -DUSE_SYSTEMWIDE_PICOSDK=On \
+    "$SRCPATH"
diff --git a/scripts/fix_clang_db.py b/scripts/fix_clang_db.py
new file mode 100755
index 0000000..fb130fe
--- /dev/null
+++ b/scripts/fix_clang_db.py
@@ -0,0 +1,16 @@
+#!/usr/bin/env python3
+
+import json
+import sys
+
+with open("compile_commands.json", "r") as f:
+    data = json.load(f)
+
+include = " -I/usr/arm-none-eabi/include"
+
+for i in range(len(data)):
+    if include not in data[i]["command"]:
+        data[i]["command"] += include
+
+with open("compile_commands.json", "w") as f:
+    json.dump(data, f)