Add buzzer functionality & ability to toggle buzzer via button

Boards.h

@@ -634,6 +634,21 @@
       #define BLE_MANUFACTURER "RAK Wireless"
       #define BLE_MODEL "RAK4640"
 
+      #define HAS_BUZZER true
+      #define PIN_BUZZER WB_IO2
+
+      // todo, I would much rather these be in Buzzer.h
+      #define RX_LO_TONE 400
+      #define RX_HI_TONE 500
+      #define TX_LO_TONE 450
+      #define TX_HI_TONE 550
+      #define MAX_BUZZER_DELAY 100
+
+      #define HAS_BUZZER_CTRL true
+
+      #define HAS_INPUT false
+      #define PIN_BUTTON WB_SW1
+
       #define INTERFACE_COUNT 1
 
       // first interface in list is the primary

Buzzer.h

@@ -0,0 +1,38 @@
+#ifndef BUZZER_H 
+    #define BUZZER_H
+
+    extern bool buzzer_enabled;
+    extern unsigned long last_tone_toggle;
+    extern uint16_t buzzer_delay;
+    extern uint16_t last_buzzer_tone;
+
+    void update_buzzer_tone(uint16_t hi_tone, uint16_t lo_tone) {
+        if (buzzer_enabled) {
+            if (millis() - last_tone_toggle >= buzzer_delay) {
+                if (last_buzzer_tone == RX_HI_TONE) {
+                    tone(PIN_BUZZER, RX_LO_TONE);
+                    last_buzzer_tone = RX_LO_TONE;
+                } else {
+                    tone(PIN_BUZZER, RX_HI_TONE);
+                    last_buzzer_tone = RX_HI_TONE;
+                }
+                buzzer_delay = ::random(MAX_BUZZER_DELAY);
+                last_tone_toggle = millis();
+            }
+        }
+    }
+
+    void update_buzzer_notone() {
+      if (buzzer_enabled) {
+          if (millis() - last_tone_toggle >= buzzer_delay) {
+              noTone(PIN_BUZZER);
+              digitalWrite(PIN_BUZZER, LOW);
+          }
+      }
+    }
+
+    void toggle_buzzer_enable() {
+        buzzer_enabled = !buzzer_enabled;
+        update_buzzer_notone();
+    }
+#endif

Config.h

@@ -133,4 +133,12 @@
     RadioInterface* selected_radio;
     RadioInterface* interface_obj[INTERFACE_COUNT];
     RadioInterface* interface_obj_sorted[INTERFACE_COUNT];
+
+    #if HAS_BUZZER
+    // Buzzer
+    bool buzzer_enabled = true;
+    unsigned long last_tone_toggle = 0;
+    uint16_t buzzer_delay = 0;
+    uint16_t last_buzzer_tone = 0;
+    #endif
 #endif

Input.h

@@ -15,12 +15,12 @@
 
 #ifndef INPUT_H
   #define INPUT_H
-  
-  #define PIN_BUTTON pin_btn_usr1
 
   #define PRESSED LOW
   #define RELEASED HIGH
 
+  #define BUTTON_MIN_DURATION 50
+
   #define EVENT_ALL                 0x00
   #define EVENT_CLICKS              0x01
   #define EVENT_BUTTON_DOWN         0x11
@@ -92,4 +92,4 @@
     }
   }
 
-#endif
+#endif

Radio.h

@@ -59,6 +59,10 @@ void led_indicate_airtime_lock();
 extern portMUX_TYPE update_lock;
 #endif
 
+#if HAS_BUZZER
+extern void update_buzzer_tone(uint16_t, uint16_t);
+#endif
+
 class RadioInterface : public Stream {
 public:
     // todo: in the future define _spiModem and _spiSettings from here for inheritence by child classes
@@ -237,6 +241,9 @@ public:
                       _last_dcd = _last_status_update;
                       _dcd_led = true;
                       _dcd = true;
+                      #if HAS_BUZZER
+                      update_buzzer_tone(RX_HI_TONE, RX_LO_TONE);
+                      #endif
                   }
               }
           } else {

Utilities.h

@@ -58,6 +58,10 @@ uint8_t eeprom_read(uint32_t mapped_addr);
 	#include "Input.h"
 #endif
 
+#if HAS_BUZZER
+    #include "Buzzer.h"
+#endif
+
 #if MCU_VARIANT == MCU_ESP32 || MCU_VARIANT == MCU_NRF52
 	#include "Device.h"
 #endif

freeNode_Firmware.ino

@@ -87,7 +87,7 @@ void setup() {
 
   Serial.begin(serial_baudrate);
 
-  #if BOARD_MODEL != BOARD_RAK4631 && BOARD_MODEL != BOARD_RNODE_NG_22
+  #if BOARD_MODEL != BOARD_FREENODE && BOARD_MODEL != BOARD_RNODE_NG_22
   // Some boards need to wait until the hardware UART is set up before booting
   // the full firmware. In the case of the RAK4631, the line below will wait
   // until a serial connection is actually established with a master. Thus, it
@@ -100,6 +100,10 @@ void setup() {
     input_init();
   #endif
 
+  #if HAS_BUZZER
+  pinMode(PIN_BUZZER, OUTPUT);
+  #endif
+
   #if HAS_NP == false
     pinMode(pin_led_rx, OUTPUT);
     pinMode(pin_led_tx, OUTPUT);
@@ -465,6 +469,9 @@ void flushQueue(RadioInterface* radio) {
     uint8_t data_byte;
 
     while (!fifo16_isempty(&packet_starts[index])) {
+      #if HAS_BUZZER
+      update_buzzer_tone(TX_HI_TONE, TX_LO_TONE);
+      #endif
       uint16_t start = fifo16_pop(&packet_starts[index]);
       uint16_t length = fifo16_pop(&packet_lengths[index]);
 
@@ -1153,7 +1160,6 @@ void loop() {
         }
     }
 
-
   // If at least one radio is online then we can continue
   if (ready) {
       if (packet_ready) {
@@ -1274,6 +1280,10 @@ void loop() {
   #if HAS_INPUT
     input_read();
   #endif
+
+  #if HAS_BUZZER
+      update_buzzer_notone();
+  #endif
 }
 
 void process_serial() {
@@ -1281,26 +1291,15 @@ void process_serial() {
       if (!fifo_isempty(&serialFIFO)) serial_poll();
 }
 
-void sleep_now() {
+#if HAS_INPUT
-  #if HAS_SLEEP == true
-    #if BOARD_MODEL == BOARD_RNODE_NG_22
-      display_intensity = 0;
-      update_display(true);
-    #endif
-    #if PIN_DISP_SLEEP >= 0
-      pinMode(PIN_DISP_SLEEP, OUTPUT);
-      digitalWrite(PIN_DISP_SLEEP, DISP_SLEEP_LEVEL);
-    #endif
-    esp_sleep_enable_ext0_wakeup(PIN_WAKEUP, WAKEUP_LEVEL);
-    esp_deep_sleep_start();
-  #endif
-}
-
 void button_event(uint8_t event, unsigned long duration) {
-  if (duration > 2000) {
+  if (duration > BUTTON_MIN_DURATION) {
-    sleep_now();
+    #if HAS_BUZZER_CTRL
+        toggle_buzzer_enable();
+    #endif
   }
 }
+#endif
 
 void poll_buffers() {
     process_serial();