Ham: playback of pre-recorded weather/traffic/other advisory voice me…

…ssage (WAV file) from micro-SD card into air with BOOT+PTT buttons press

README.md

@@ -80,7 +80,7 @@ Data|FLARM NMEA|<p align="center">![](https://github.com/lyusupov/SoftRF/raw/mas
 <sup>1</sup> - it is necessary for a reader to distinguish the difference between statement "**compatible**" and statement "**fully compatible**".<br>
 &nbsp;&nbsp;&nbsp;&nbsp; SoftRF implements only a reasonable minimum of the protocols specs. No "bells and whistles" so far.<br>
 <sup>2</sup> - FANET+ can not receive FLARM. However it is able to transmit it.<br>
-<sup>3</sup> - valid for [**Prime Mark III**](https://github.com/lyusupov/SoftRF/wiki/Prime-Edition-MkIII) , [**Prime Mark II**](https://github.com/lyusupov/SoftRF/wiki/Prime-Edition-MkII) , [**Dongle**](https://github.com/lyusupov/SoftRF/wiki/Dongle-Edition) , [**Mini**](https://github.com/lyusupov/SoftRF/wiki/Mini-Edition) , [**Badge**](https://github.com/lyusupov/SoftRF/wiki/Badge-Edition) , [**Bracelet**](https://github.com/lyusupov/SoftRF/wiki/Bracelet-Edition) , [**Academy**](https://github.com/lyusupov/SoftRF/wiki/Academy-Edition) , [**Octave**](https://github.com/lyusupov/SoftRF/wiki/Octave-Concept) , [**Lego**](https://github.com/lyusupov/SoftRF/wiki/Lego-Edition) and [**Balkan**](https://github.com/lyusupov/SoftRF/wiki/Balkan-Edition) **Editions**; valid for [**Standalone**](https://github.com/lyusupov/SoftRF/wiki/Standalone-Edition) , [**UAV**](https://github.com/lyusupov/SoftRF/wiki/UAV-Edition) and [**Uni**](https://github.com/lyusupov/SoftRF/wiki/Uni-Edition) **Editions** with optional DIY [SoftRF LoRa RF module](https://github.com/lyusupov/SoftRF/wiki/SoftRF-LoRa-module)<br>
+<sup>3</sup> - valid for [**Prime Mark III**](https://github.com/lyusupov/SoftRF/wiki/Prime-Edition-MkIII) , [**Prime Mark II**](https://github.com/lyusupov/SoftRF/wiki/Prime-Edition-MkII) , [**Dongle**](https://github.com/lyusupov/SoftRF/wiki/Dongle-Edition) , [**Mini**](https://github.com/lyusupov/SoftRF/wiki/Mini-Edition) , [**Badge**](https://github.com/lyusupov/SoftRF/wiki/Badge-Edition) , [**Bracelet**](https://github.com/lyusupov/SoftRF/wiki/Bracelet-Edition) , [**Academy**](https://github.com/lyusupov/SoftRF/wiki/Academy-Edition) , [**Octave**](https://github.com/lyusupov/SoftRF/wiki/Octave-Concept) , [**Lego**](https://github.com/lyusupov/SoftRF/wiki/Lego-Edition) , [**Balkan**](https://github.com/lyusupov/SoftRF/wiki/Balkan-Edition) and [**Midi**](https://github.com/lyusupov/SoftRF/wiki/Midi-Edition) **Editions**; valid for [**Standalone**](https://github.com/lyusupov/SoftRF/wiki/Standalone-Edition) , [**UAV**](https://github.com/lyusupov/SoftRF/wiki/UAV-Edition) and [**Uni**](https://github.com/lyusupov/SoftRF/wiki/Uni-Edition) **Editions** with optional DIY [SoftRF LoRa RF module](https://github.com/lyusupov/SoftRF/wiki/SoftRF-LoRa-module)<br>
 <sup>4</sup> - [**Reception**](https://github.com/lyusupov/SoftRF/wiki/Uni-Edition#ads-b-out-remark) of traffic 'downlink' frames only. Valid for [**Uni Edition**](https://github.com/lyusupov/SoftRF/wiki/Uni-Edition) alone and for [**Standalone Edition**](https://github.com/lyusupov/SoftRF/wiki/Standalone-Edition) with optional DIY [SoftRF UAT module](https://github.com/lyusupov/UAT-test-signal#variant-2-advanced)<br>
 <sup>5</sup> - Reception of traffic 'downlink' frames only. Valid for [**ES Edition**](https://github.com/lyusupov/SoftRF/wiki/ES-Edition)<br>
 <sup>6</sup> - APRS is the only available with [**Ham Edition**](https://github.com/lyusupov/SoftRF/wiki/Ham-Edition)<br>

software/firmware/source/SoftRF/src/platform/ESP32.cpp

@@ -378,6 +378,56 @@ extern SA818Controller controller;
 extern uint32_t Data_Frequency;
 extern uint32_t Voice_Frequency;
 extern void sa868_Tx_LED_state(bool);
+
+#if !defined(EXCLUDE_VOICE_MESSAGE)
+#include <driver/i2s.h>
+#include <AudioFileSourceSdFat.h>
+#include <AudioGeneratorWAV.h>
+#include <AudioOutputI2S.h>
+
+#define MAX_FILENAME_LEN      64
+#define WAV_FILE_PREFIX       "/Audio/"
+#define WAV_FILE_SUFFIX       ".wav"
+
+AudioGeneratorWAV    *Audio_Gen;
+AudioFileSourceSdFat *Audio_Source;
+AudioOutputI2S       *Audio_Sink;
+
+bool playback_inited = false;
+
+static bool play_file(char *filename)
+{
+  bool rval = false;
+
+  if (Audio_Source->open(filename)) {
+    unsigned long Audio_Timemarker = millis();
+    Audio_Gen->begin(Audio_Source, Audio_Sink);
+
+    bool wdt_status = loopTaskWDTEnabled;
+
+    if (wdt_status) {
+      disableLoopWDT();
+    }
+
+    while (Audio_Gen->loop()) {
+      // feedLoopWDT();
+      if (millis() - Audio_Timemarker > 30000) {
+        Audio_Gen->stop();
+        Serial.println("ERROR: Audio timeout. Playback aborted.");
+        Serial.flush();
+      }
+    }
+
+    if (wdt_status) {
+      enableLoopWDT();
+    }
+
+    rval = true;
+  }
+
+  return rval;
+}
+#endif /* EXCLUDE_VOICE_MESSAGE */
 #endif /* USE_SA8X8 */
 #endif /* CONFIG_IDF_TARGET_ESP32S3 */
 
@@ -1140,6 +1190,23 @@ static void ESP32_setup()
       digitalWrite(uSD_SS_pin, HIGH);
 
       uSD_is_attached = uSD.cardBegin(SD_CONFIG);
+
+#if !defined(EXCLUDE_VOICE_MESSAGE)
+      if (uSD_is_attached && uSD.card()->cardSize() > 0 && uSD.volumeBegin()) {
+        Audio_Gen    = new AudioGeneratorWAV();
+        Audio_Source = new AudioFileSourceSdFat(uSD);
+
+        Audio_Sink   = new AudioOutputI2S(0, AudioOutputI2S::INTERNAL_PDM);
+        Audio_Sink->SetPinout(I2S_PIN_NO_CHANGE,
+                              I2S_PIN_NO_CHANGE,
+                              SOC_GPIO_PIN_TWR2_PDM_OUT,
+                              I2S_PIN_NO_CHANGE);
+        Audio_Sink->SetOutputModeMono(true);
+        Audio_Sink->SetChannels(1);
+        Audio_Sink->SetMclk(false);
+        playback_inited = true;
+      }
+#endif /* EXCLUDE_VOICE_MESSAGE */
     }
   } else if (hw_info.model == SOFTRF_MODEL_MIDI) {
 
@@ -3823,7 +3890,11 @@ void handleMainEvent(AceButton* button, uint8_t eventType,
       if (button == &button_ptt &&
           Voice_Frequency > 0   &&
           (settings->power_save & POWER_SAVE_NORECEIVE)) {
-        pinMode(SOC_GPIO_PIN_TWR2_MIC_CH_SEL, INPUT_PULLDOWN);
+        bool playback = false;
+#if !defined(EXCLUDE_VOICE_MESSAGE)
+        playback = playback_inited && (digitalRead(SOC_GPIO_PIN_S3_BUTTON) == 0);
+#endif /* EXCLUDE_VOICE_MESSAGE */
+        if (!playback) {pinMode(SOC_GPIO_PIN_TWR2_MIC_CH_SEL, INPUT_PULLDOWN);}
         PTT_TxF = controller.getTXF();
         controller.setTXF(Voice_Frequency / 1000000.0);
         controller.update();
@@ -3844,6 +3915,15 @@ void handleMainEvent(AceButton* button, uint8_t eventType,
 #endif /* USE_OLED */
         sa868_Tx_LED_state(true);
         controller.transmit();
+#if !defined(EXCLUDE_VOICE_MESSAGE)
+        if (playback) {
+          char filename[MAX_FILENAME_LEN];
+          strcpy(filename, WAV_FILE_PREFIX);
+          strcat(filename, "message");
+          strcat(filename, WAV_FILE_SUFFIX);
+          play_file(filename);
+        }
+#endif /* EXCLUDE_VOICE_MESSAGE */
       }
       break;
 #endif /* USE_SA8X8 */

software/firmware/source/SoftRF/src/platform/ESP32.h

@@ -310,6 +310,7 @@ struct rst_info {
 //#define USE_GDL90_MSL
 #define USE_OGN_ENCRYPTION
 #define ENABLE_PROL
+#define EXCLUDE_VOICE_MESSAGE
 
 //#define EXCLUDE_GNSS_UBLOX    /* Neo-6/7/8, M10 */
 #define ENABLE_UBLOX_RFS        /* revert factory settings (when necessary)  */

software/firmware/source/SoftRF/src/platform/iomap/LilyGO_TTWR.h

@@ -16,6 +16,7 @@
 #define SOC_GPIO_PIN_TWR2_RADIO_PD      40
 #define SOC_GPIO_PIN_TWR2_RADIO_SQL     2  /* T-TWR 2.1 only */
 #define SOC_GPIO_PIN_TWR2_MIC_CH_SEL    17
+#define SOC_GPIO_PIN_TWR2_PDM_OUT       18
 
 // Radio SPI (not in use)
 #define SOC_GPIO_PIN_TWR2_MOSI          16