diff --git a/.codespell/exclude-file.txt b/.codespell/exclude-file.txt
new file mode 100644
index 00000000..af8265cc
--- /dev/null
+++ b/.codespell/exclude-file.txt
@@ -0,0 +1 @@
+  return USB0.INTSTS1.BIT.ATTCH ? true : false;
diff --git a/.codespell/ignore-words.txt b/.codespell/ignore-words.txt
new file mode 100644
index 00000000..e37d97a9
--- /dev/null
+++ b/.codespell/ignore-words.txt
@@ -0,0 +1,8 @@
+synopsys
+sie
+tre
+hsi
+fro
+dout
+mot
+te
diff --git a/.codespellrc b/.codespellrc
new file mode 100644
index 00000000..142bbbe1
--- /dev/null
+++ b/.codespellrc
@@ -0,0 +1,10 @@
+# See: https://github.com/codespell-project/codespell#using-a-config-file
+[codespell]
+# In the event of a false positive, add the problematic word, in all lowercase, to 'ignore-words.txt' (one word per line).
+# Or copy & paste the whole problematic line to 'exclude-file.txt'
+ignore-words = .codespell/ignore-words.txt
+exclude-file = .codespell/exclude-file.txt
+check-filenames =
+check-hidden =
+count =
+skip = .cproject,./.git,./hw/mcu,./lib,./examples/*/*/_build,./examples/*/*/ses,./examples/*/*/ozone,./hw/mcu,./test/vendor,./tests_obsolete,./tools/uf2
diff --git a/.github/workflows/build_aarch64.yml b/.github/workflows/build_aarch64.yml
index af26f33f..49973fe4 100644
--- a/.github/workflows/build_aarch64.yml
+++ b/.github/workflows/build_aarch64.yml
@@ -7,6 +7,10 @@ on:
     types:
       - created
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   # ---------------------------------------
   # Build AARCH64 family
diff --git a/.github/workflows/build_arm.yml b/.github/workflows/build_arm.yml
index 369048fc..56200465 100644
--- a/.github/workflows/build_arm.yml
+++ b/.github/workflows/build_arm.yml
@@ -7,28 +7,11 @@ on:
     types:
       - created
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
-  # ---------------------------------------
-  # Unit testing with Ceedling
-  # ---------------------------------------
-  unit-test:
-    runs-on: ubuntu-latest
-    steps:
-    - name: Setup Ruby
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: '2.7'
-
-    - name: Checkout TinyUSB
-      uses: actions/checkout@v3
-
-    - name: Unit Tests
-      run: |
-        # Install Ceedling
-        gem install ceedling
-        cd test
-        ceedling test:all
-
   # ---------------------------------------
   # Build ARM family
   # ---------------------------------------
diff --git a/.github/workflows/build_esp.yml b/.github/workflows/build_esp.yml
index 51d91de4..d775e50b 100644
--- a/.github/workflows/build_esp.yml
+++ b/.github/workflows/build_esp.yml
@@ -7,6 +7,10 @@ on:
     types:
       - created
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   build-esp:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/build_msp430.yml b/.github/workflows/build_msp430.yml
index 1ef25a6a..d28341e5 100644
--- a/.github/workflows/build_msp430.yml
+++ b/.github/workflows/build_msp430.yml
@@ -7,6 +7,10 @@ on:
     types:
       - created
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:  
   build-msp430:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/build_renesas.yml b/.github/workflows/build_renesas.yml
index 2e272c83..6cb873dd 100644
--- a/.github/workflows/build_renesas.yml
+++ b/.github/workflows/build_renesas.yml
@@ -7,6 +7,10 @@ on:
     types:
       - created
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   build-rx:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/build_riscv.yml b/.github/workflows/build_riscv.yml
index 61c1c60c..18e952d9 100644
--- a/.github/workflows/build_riscv.yml
+++ b/.github/workflows/build_riscv.yml
@@ -7,6 +7,10 @@ on:
     types:
       - created
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   build-riscv:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/pre-commit.yml b/.github/workflows/pre-commit.yml
new file mode 100644
index 00000000..2463903f
--- /dev/null
+++ b/.github/workflows/pre-commit.yml
@@ -0,0 +1,36 @@
+name: pre-commit
+
+on:
+  pull_request:
+  push:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Setup Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.x'
+
+    - name: Setup Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: '2.7'
+
+    - name: Checkout TinyUSB
+      uses: actions/checkout@v3
+
+    - name: Run codespell
+      uses: codespell-project/actions-codespell@master
+
+    - name: Run Unit Tests
+      run: |
+        # Install Ceedling
+        gem install ceedling
+        cd test
+        ceedling test:all
\ No newline at end of file