Add clang-format

Signed-off-by: Matthias Blankertz <matthias@blankertz.org>

.gitea/workflows/check-format.yaml

@@ -0,0 +1,14 @@
+name: Check code formatting
+on:
+  push:
+
+jobs:
+  Check-C-Format:
+    runs-on: ubuntu-22.04-full
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v4
+      - name: Run clang format
+        run: |
+          cmake software -B build
+          cmake --build build -- check-format

.gitignore

@@ -2,3 +2,4 @@ hardware/tonberry-pico/tonberry-pico-backups/
 *~
 *.kicad_sch-bak
 *.kicad_sch.lck
+software/build

software/CMakeLists.txt

@@ -0,0 +1,13 @@
+cmake_minimum_required(VERSION 3.14)
+
+project(tonberry-pico)
+
+add_custom_target(check-format
+    find . -iname '*.[ch]' -exec clang-format -Werror --dry-run {} +
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/src
+)
+
+add_custom_target(clang-format
+    find . -iname '*.[ch]' -exec clang-format -i {} +
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/src
+)

software/src/.clang-format

@@ -0,0 +1,6 @@
+# -*- mode: yaml -*-
+
+BasedOnStyle: LLVM
+IndentWidth: 4
+ColumnLimit: 120
+BreakBeforeBraces: WebKit # Only break at start of functions

software/src/audiocore/audiocore.c

@@ -6,7 +6,8 @@
 
 #include "py/mperrno.h"
 
-void core1_main(void) {
+void core1_main(void)
+{
     if (!i2s_init(shared_context.out_pin, shared_context.sideset_base, shared_context.samplerate))
         multicore_fifo_push_blocking(MP_EIO);
 

software/src/audiocore/audiocore.h

@@ -8,20 +8,23 @@
 #include <string.h>
 
 /* Access rules
- * audiocore processing runs on core 1 and, unless stated otherwise, all variables may only be accessed from core 1.
- * Take care of interrupt safety where needed.
- * The micropython interface lives in module.c and is invoked from the micropython runtime on core 0.
- * Micropython objects may only be handled in that context
- * The audiocore_shared_context struct defined below is used for communication between the cores.
+ * audiocore processing runs on core 1 and, unless stated otherwise, all
+ * variables may only be accessed from core 1. Take care of interrupt safety
+ * where needed. The micropython interface lives in module.c and is invoked from
+ * the micropython runtime on core 0. Micropython objects may only be handled in
+ * that context The audiocore_shared_context struct defined below is used for
+ * communication between the cores.
  */
 
 #define AUDIO_BUFFER_SIZE 2048
 
-// Context shared between the micropython runtime on core0 and the audio task on core1
-// All access must hold "lock" unless otherwise noted
+// Context shared between the micropython runtime on core0 and the audio task on
+// core1 All access must hold "lock" unless otherwise noted
 struct audiocore_shared_context {
     spin_lock_t *lock;
-    int out_pin, sideset_base, samplerate; // Set by module.c before core1 is launched and then never changed, can be read without lock
+    int out_pin, sideset_base,
+        samplerate; // Set by module.c before core1 is launched and then never
+                    // changed, can be read without lock
     uint32_t audio_buffer[AUDIO_BUFFER_SIZE];
     int audio_buffer_write, audio_buffer_read;
     int underruns;
@@ -48,7 +51,8 @@ static inline unsigned audiocore_get_audio_buffer_avail(void)
 static inline void audiocore_audio_buffer_put(const uint32_t *restrict src, const size_t len)
 {
     const unsigned end_samples = AUDIO_BUFFER_SIZE - shared_context.audio_buffer_write;
-    memcpy(shared_context.audio_buffer + shared_context.audio_buffer_write, src, 4 * ((end_samples >= len) ? len : end_samples));
+    memcpy(shared_context.audio_buffer + shared_context.audio_buffer_write, src,
+           4 * ((end_samples >= len) ? len : end_samples));
     if (end_samples < len) {
         memcpy(shared_context.audio_buffer, src + end_samples, 4 * (len - end_samples));
         shared_context.audio_buffer_write = len - end_samples;

software/src/audiocore/i2s.c

@@ -1,8 +1,8 @@
 // SPDX-License-Identifier: MIT
 // Copyright (c) 2024 Matthias Blankertz <matthias@blankertz.org>
 
-#include "i2s_max98357.pio.h"
 #include "audiocore.h"
+#include "i2s_max98357.pio.h"
 
 #include <hardware/dma.h>
 #include <hardware/sync.h>
@@ -23,7 +23,6 @@ struct i2s_context {
 
 static struct i2s_context i2s_context;
 
-
 static void dma_isr(void)
 {
     if (!dma_channel_get_irq1_status(i2s_context.dma_ch))
@@ -56,7 +55,8 @@ bool i2s_init(int out_pin, int sideset_base, int samplerate)
     if (i2s_context.pio_sm == -1)
         return false;
     i2s_context.pio_program_offset = pio_add_program(audiocore_pio, &i2s_max98357_program);
-    i2s_max98357_program_init(audiocore_pio, i2s_context.pio_sm, i2s_context.pio_program_offset, out_pin, sideset_base, samplerate);
+    i2s_max98357_program_init(audiocore_pio, i2s_context.pio_sm, i2s_context.pio_program_offset, out_pin, sideset_base,
+                              samplerate);
 
     i2s_context.dma_ch = dma_claim_unused_channel(false);
     if (i2s_context.dma_ch == -1)

software/src/audiocore/module.c

@@ -4,8 +4,8 @@
 #include "audiocore.h"
 
 // Include MicroPython API.
-#include "py/runtime.h"
 #include "py/mperrno.h"
+#include "py/runtime.h"
 
 // This module is RP2 specific
 #include "mphalport.h"
@@ -19,7 +19,8 @@ struct audiocore_Context_obj {
     mp_obj_base_t base;
 };
 
-static mp_obj_t audiocore_Context_deinit(mp_obj_t self_in) {
+static mp_obj_t audiocore_Context_deinit(mp_obj_t self_in)
+{
     struct audiocore_Context_obj *self = MP_OBJ_TO_PTR(self_in);
     multicore_fifo_push_blocking(AUDIOCORE_CMD_SHUTDOWN);
     multicore_fifo_pop_blocking();
@@ -30,7 +31,8 @@ static mp_obj_t audiocore_Context_deinit(mp_obj_t self_in) {
 }
 static MP_DEFINE_CONST_FUN_OBJ_1(audiocore_Context_deinit_obj, audiocore_Context_deinit);
 
-static mp_obj_t audiocore_Context_put(mp_obj_t self_in, mp_obj_t buffer) {
+static mp_obj_t audiocore_Context_put(mp_obj_t self_in, mp_obj_t buffer)
+{
     struct audiocore_Context_obj *self = MP_OBJ_TO_PTR(self_in);
     (void)self;
     mp_buffer_info_t bufinfo;
@@ -50,11 +52,12 @@ static mp_obj_t audiocore_Context_put(mp_obj_t self_in, mp_obj_t buffer) {
     const unsigned underruns = shared_context.underruns;
     spin_unlock(shared_context.lock, flags);
 
-    mp_obj_t items[] = {mp_obj_new_int(to_copy),
+    mp_obj_t items[] = {
+        mp_obj_new_int(to_copy),
         mp_obj_new_int(buf_space),
-			 mp_obj_new_int(underruns),};
+        mp_obj_new_int(underruns),
+    };
     return mp_obj_new_tuple(3, items);
-    //return mp_obj_new_int(to_copy);
 }
 static MP_DEFINE_CONST_FUN_OBJ_2(audiocore_Context_put_obj, audiocore_Context_put);
 
@@ -66,14 +69,11 @@ static const mp_rom_map_elem_t audiocore_Context_locals_dict_table[] = {
 static MP_DEFINE_CONST_DICT(audiocore_Context_locals_dict, audiocore_Context_locals_dict_table);
 const mp_obj_type_t audiocore_Context_type;
 
-MP_DEFINE_CONST_OBJ_TYPE(
-    audiocore_Context_type,
-    MP_QSTR_Context,
-    MP_TYPE_FLAG_NONE,
-    locals_dict, &audiocore_Context_locals_dict
-);
+MP_DEFINE_CONST_OBJ_TYPE(audiocore_Context_type, MP_QSTR_Context, MP_TYPE_FLAG_NONE, locals_dict,
+                         &audiocore_Context_locals_dict);
 
-static mp_obj_t audiocore_init(mp_obj_t pin_obj, mp_obj_t sideset_obj, mp_obj_t samplerate_obj) {
+static mp_obj_t audiocore_init(mp_obj_t pin_obj, mp_obj_t sideset_obj, mp_obj_t samplerate_obj)
+{
     if (initialized)
         mp_raise_OSError(MP_EBUSY);
     if (!shared_context.lock) {