Merge branch 'main' into integrate_pull_request_137

# Conflicts:
#	edrumulus.h
#	edrumulus.ino
#	hardware.cpp
#	hardware.h

.clang-format

@@ -0,0 +1,26 @@
+BasedOnStyle: Google
+IndentWidth: 2
+TabWidth: 2
+UseTab: Never
+BreakBeforeBraces: Allman
+ColumnLimit: 0
+SpaceBeforeParens: ControlStatements
+SpaceAfterCStyleCast: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+SpacesInContainerLiterals: false
+AlignAfterOpenBracket: DontAlign
+AlignTrailingComments: true
+BinPackArguments: false
+BinPackParameters: false
+PenaltyBreakBeforeFirstCallParameter: 0
+
+AllowShortCaseLabelsOnASingleLine: true
+AlignConsecutiveAssignments: true
+SpacesBeforeTrailingComments: 1
+AlignOperands: true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortFunctionsOnASingleLine: All
+IndentPPDirectives: AfterHash
+#AllowShortLiteralsOnASingleLine: true
+#BracketAlignmentStyle: BAS_Align

.github/workflows/main.yml

@@ -33,5 +33,13 @@ jobs:
         python -m pip install --upgrade pip
         pip install --upgrade platformio setuptools wheel
 
+    - name: Install clang-format
+      run: sudo apt-get install clang-format
+
+    - name: Check clang-format
+      run: |
+        # Only check the format of the files in the root directory
+        clang-format --dry-run --Werror *.c *.cpp *.h *.ino
+
     - name: Build
       run: pio ci -c platformio.ini .

common.h

@@ -0,0 +1,84 @@
+/******************************************************************************\
+ * Copyright (c) 2020-2024
+ * Author(s): Volker Fischer
+ ******************************************************************************
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any later
+ * version.
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+\******************************************************************************/
+
+#pragma once
+
+//#define USE_SERIAL_DEBUG_PLOTTING
+
+#define VERSION_MAJOR 0
+#define VERSION_MINOR 9
+
+#define MAX_NUM_PADS 12      // a maximum of 12 pads are supported
+#define MAX_NUM_PAD_INPUTS 5 // a maximum of 5 sensors per pad is supported (where one is rim and one is the sum of three)
+
+inline void update_fifo(const float input,
+    const int fifo_length,
+    float* fifo_memory)
+{
+  // move all values in the history one step back and put new value on the top
+  for (int i = 0; i < fifo_length - 1; i++)
+  {
+    fifo_memory[i] = fifo_memory[i + 1];
+  }
+  fifo_memory[fifo_length - 1] = input;
+}
+
+inline void allocate_initialize(float** array_memory,
+    const int array_length)
+{
+  // (delete and) allocate memory
+  if (*array_memory != nullptr)
+  {
+    delete[] * array_memory;
+  }
+
+  *array_memory = new float[array_length];
+
+  // initialization values
+  for (int i = 0; i < array_length; i++)
+  {
+    (*array_memory)[i] = 0.0f;
+  }
+}
+
+class FastWriteFIFO
+{
+ public:
+  void initialize(const int len)
+  {
+    pointer     = 0;
+    fifo_length = len;
+    allocate_initialize(&fifo_memory, len);
+  }
+
+  void add(const float input)
+  {
+    // write new value and increment data pointer with wrap around
+    fifo_memory[pointer] = input;
+    pointer              = (pointer + 1) % fifo_length;
+  }
+
+  const float operator[](const int index)
+  {
+    return fifo_memory[(pointer + index) % fifo_length];
+  }
+
+ protected:
+  float* fifo_memory = nullptr;
+  int pointer;
+  int fifo_length;
+};