1 files changed, 0 insertions, 115 deletions
diff --git a/platforms/chibios/drivers/audio_pwm_hardware.c b/platforms/chibios/drivers/audio_pwm_hardware.c
deleted file mode 100644
index 40d891326f..0000000000
--- a/platforms/chibios/drivers/audio_pwm_hardware.c
+++ /dev/null
@@ -1,115 +0,0 @@
-// Copyright 2022 Stefan Kerkmann
-// Copyright 2020 Jack Humbert
-// Copyright 2020 JohSchneider
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-// Audio Driver: PWM the duty-cycle is always kept at 50%, and the pwm-period is
-// adjusted to match the frequency of a note to be played back. This driver uses
-// the chibios-PWM system to produce a square-wave on specific output pins that
-// are connected to the PWM hardware. The hardware directly toggles the pin via
-// its alternate function. see your MCUs data-sheet for which pin can be driven
-// by what timer - looking for TIMx_CHy and the corresponding alternate
-// function.
-
-#include "audio.h"
-#include "gpio.h"
-
-#if !defined(AUDIO_PIN)
-#    error "Audio feature enabled, but no pin selected - see docs/feature_audio under the ARM PWM settings"
-#endif
-
-#if !defined(AUDIO_PWM_COUNTER_FREQUENCY)
-#    define AUDIO_PWM_COUNTER_FREQUENCY 100000
-#endif
-
-extern bool    playing_note;
-extern bool    playing_melody;
-extern uint8_t note_timbre;
-
-static PWMConfig pwmCFG = {.frequency = AUDIO_PWM_COUNTER_FREQUENCY, /* PWM clock frequency  */
-                           .period    = 2,
-                           .callback  = NULL,
-                           .channels  = {[(AUDIO_PWM_CHANNEL - 1)] = {.mode = PWM_OUTPUT_ACTIVE_HIGH, .callback = NULL}}};
-
-static float channel_1_frequency = 0.0f;
-
-void channel_1_set_frequency(float freq) {
-    channel_1_frequency = freq;
-
-    if (freq <= 0.0) {
-        // a pause/rest has freq=0
-        return;
-    }
-
-    pwmcnt_t period = (pwmCFG.frequency / freq);
-    chSysLockFromISR();
-    pwmChangePeriodI(&AUDIO_PWM_DRIVER, period);
-    pwmEnableChannelI(&AUDIO_PWM_DRIVER, AUDIO_PWM_CHANNEL - 1,
-                      // adjust the duty-cycle so that the output is for 'note_timbre' duration HIGH
-                      PWM_PERCENTAGE_TO_WIDTH(&AUDIO_PWM_DRIVER, (100 - note_timbre) * 100));
-    chSysUnlockFromISR();
-}
-
-float channel_1_get_frequency(void) {
-    return channel_1_frequency;
-}
-
-void channel_1_start(void) {
-    pwmStop(&AUDIO_PWM_DRIVER);
-    pwmStart(&AUDIO_PWM_DRIVER, &pwmCFG);
-}
-
-void channel_1_stop(void) {
-    pwmStop(&AUDIO_PWM_DRIVER);
-}
-
-static virtual_timer_t audio_vt;
-static void            audio_callback(virtual_timer_t *vtp, void *p);
-
-// a regular timer task, that checks the note to be currently played and updates
-// the pwm to output that frequency.
-static void audio_callback(virtual_timer_t *vtp, void *p) {
-    float freq; // TODO: freq_alt
-
-    if (audio_update_state()) {
-        freq = audio_get_processed_frequency(0); // freq_alt would be index=1
-        channel_1_set_frequency(freq);
-    }
-
-    chSysLockFromISR();
-    chVTSetI(&audio_vt, TIME_MS2I(16), audio_callback, NULL);
-    chSysUnlockFromISR();
-}
-
-void audio_driver_initialize(void) {
-    pwmStart(&AUDIO_PWM_DRIVER, &pwmCFG);
-
-    // connect the AUDIO_PIN to the PWM hardware
-#if defined(USE_GPIOV1) // STM32F103C8, RP2040
-    palSetLineMode(AUDIO_PIN, AUDIO_PWM_PAL_MODE);
-#else // GPIOv2 (or GPIOv3 for f4xx, which is the same/compatible at this command)
-    palSetLineMode(AUDIO_PIN, PAL_MODE_ALTERNATE(AUDIO_PWM_PAL_MODE));
-#endif
-
-    chVTObjectInit(&audio_vt);
-}
-
-void audio_driver_start(void) {
-    channel_1_stop();
-    channel_1_start();
-
-    if ((playing_note || playing_melody) && !chVTIsArmed(&audio_vt)) {
-        // a whole note is one beat, which is - per definition in
-        // musical_notes.h - set to 64 the longest note is
-        // BREAVE_DOT=128+64=192, the shortest SIXTEENTH=4 the tempo (which
-        // might vary!) is in bpm (beats per minute) therefore: if the timer
-        // ticks away at 64Hz (~16.6ms) audio_update_state is called just often
-        // enough to not miss any notes
-        chVTSet(&audio_vt, TIME_MS2I(16), audio_callback, NULL);
-    }
-}
-
-void audio_driver_stop(void) {
-    channel_1_stop();
-    chVTReset(&audio_vt);
-}