sync

firmware/src/audio.c

@@ -3,6 +3,7 @@
 #include <zephyr/device.h>
 #include <zephyr/drivers/i2s.h>
 #include <zephyr/pm/device.h>
+#include <zephyr/drivers/gpio.h>
 #include <string.h>
 
 #include <audio.h>
@@ -29,13 +30,42 @@ K_SEM_DEFINE(audio_ready_sem, 0, 1);
 #error "Audio I2S alias not defined in devicetree"
 #endif
 
+#define AUDIO_AMP_ENABLE_NODE DT_ALIAS(audio_amp_en)
+#if !DT_NODE_EXISTS(AUDIO_AMP_ENABLE_NODE)
+#error "Audio Amplifier Enable alias not defined in devicetree"
+#endif
+
 static const struct device *const i2s_dev = DEVICE_DT_GET(I2S_NODE);
+static const struct gpio_dt_spec amp_en_dev = GPIO_DT_SPEC_GET(AUDIO_AMP_ENABLE_NODE, gpios);
+
+
 static volatile bool abort_playback = false;
 static char next_random_filename[64] = {0};
 
 static uint32_t audio_file_count = 0;
 static char cached_404_path[] = "/lfs/sys/404";
 
+void i2s_suspend(void)
+{
+    LOG_DBG("Suspending I2S interface for power saving");
+    i2s_trigger(i2s_dev, I2S_DIR_TX, I2S_TRIGGER_DROP);
+    
+    /* Nutzt jetzt die korrekte Spezifikation */
+    gpio_pin_set_dt(&amp_en_dev, 0); 
+    
+    pm_device_action_run(i2s_dev, PM_DEVICE_ACTION_SUSPEND);
+}
+
+void i2s_resume(void)
+{
+    LOG_DBG("Resuming I2S interface");
+    
+    /* Zuerst Pin auf High, dann Hardware wecken */
+    gpio_pin_set_dt(&amp_en_dev, 1);
+    
+    pm_device_action_run(i2s_dev, PM_DEVICE_ACTION_RESUME);
+}
+
 void audio_refresh_file_count(void)
 {
     struct fs_dir_t dirp;
@@ -142,6 +172,7 @@ void audio_thread(void *arg1, void *arg2, void *arg3)
 {
     LOG_DBG("Audio thread started");
     k_sem_take(&audio_ready_sem, K_FOREVER);
+    i2s_suspend();
 
     /* Ersten zufälligen Dateinamen beim Booten vorab cachen */
     get_random_file(next_random_filename, sizeof(next_random_filename));
@@ -152,9 +183,8 @@ void audio_thread(void *arg1, void *arg2, void *arg3)
     {
         if (k_msgq_get(&audio_play_msgq, &filename, K_FOREVER) == 0)
         {
-            fs_pm_flash_resume();
-
             abort_playback = false;
+            i2s_resume();
 
             /* 2. Datei bestimmen (aus Cache oder synchron als Fallback) */
             if (filename[0] == '\0')
@@ -178,7 +208,7 @@ void audio_thread(void *arg1, void *arg2, void *arg3)
 
             struct fs_file_t file;
             fs_file_t_init(&file);
-            if (fs_open(&file, filename, FS_O_READ) < 0)
+            if (fs_pm_open(&file, filename, FS_O_READ) < 0)
             {
                 LOG_ERR("Failed to open %s", filename);
                 continue;
@@ -284,10 +314,10 @@ void audio_thread(void *arg1, void *arg2, void *arg3)
                 }
             }
 
-            fs_close(&file);
-            fs_pm_flash_suspend();
+            fs_pm_close(&file);
             if (k_msgq_num_used_get(&audio_play_msgq) == 0)
             {
+                i2s_suspend();
                 io_status(false);
             }
 
@@ -325,6 +355,19 @@ int audio_init(void)
     if (ret < 0)
         return ret;
 
+    if (!gpio_is_ready_dt(&amp_en_dev)) {
+        LOG_DBG("Amplifier enable GPIO device not ready");
+        return -ENODEV;
+    }
+
+    ret = gpio_pin_configure_dt(&amp_en_dev, GPIO_OUTPUT_ACTIVE);
+    if (ret < 0) {
+        LOG_ERR("Failed to configure amplifier enable GPIO: %d", ret);
+        return ret;
+    }
+
+    gpio_pin_configure_dt(&amp_en_dev, 0);
+
     audio_refresh_file_count();
     LOG_INF("Audio initialized: %u bits, %u.%03u kHz", config.word_size, config.frame_clk_freq / 1000, config.frame_clk_freq % 1000);
     return 0;