Buzzer Support for M5Stack

variants/m5stack_core/Speaker.cpp

@@ -0,0 +1,33 @@
+#include "Speaker.h"
+
+TONE::TONE(void) {
+  _volume = 5;
+  _begun = false;
+}
+
+void TONE::begin() {
+  _begun = true;
+  ledcSetup(TONE_PIN_CHANNEL, 0, 13);
+  ledcAttachPin(PIN_BUZZER, TONE_PIN_CHANNEL);
+}
+
+void TONE::end() {
+  mute();
+  ledcDetachPin(PIN_BUZZER);
+  _begun = false;
+}
+
+void TONE::tone(uint16_t frequency) {
+  if(!_begun) begin();
+  ledcWriteTone(TONE_PIN_CHANNEL, frequency);
+  ledcWrite(TONE_PIN_CHANNEL, 0x400 >> _volume);
+}
+
+void TONE::setVolume(uint8_t volume) {
+  _volume = 11 - volume;
+}
+
+void TONE::mute() {
+  ledcWriteTone(TONE_PIN_CHANNEL, 0);
+  digitalWrite(PIN_BUZZER, 0);
+}

variants/m5stack_core/Speaker.h

@@ -0,0 +1,30 @@
+#ifndef _SPEAKER_H_
+  #define _SPEAKER_H_
+
+  #include "configuration.h"
+
+  #ifdef __cplusplus
+    extern "C"
+    {
+  #endif /* __cplusplus */
+  #include "esp32-hal-dac.h"
+  #ifdef __cplusplus
+    }
+  #endif /* __cplusplus */
+
+  class TONE {
+    public:
+      TONE(void);
+
+      void begin();
+      void end();
+      void mute();
+      void tone(uint16_t frequency);
+      void setVolume(uint8_t volume);
+
+    private:
+      uint8_t _volume;
+      bool _begun;
+      bool speaker_on;
+  };
+#endif

variants/m5stack_core/platformio.ini

@@ -4,6 +4,9 @@ board = m5stack-core-esp32
 upload_port = COM8
 monitor_port = COM8
 monitor_filters = esp32_exception_decoder
+src_filter = 
+  ${esp32_base.src_filter}
+  +<../variants/m5stack_core>
 build_flags = 
   ${esp32_base.build_flags} -D PRIVATE_HW -I variants/m5stack_core
   -DILI9341_DRIVER
@@ -24,4 +27,4 @@ lib_ignore =
   m5stack-core
 lib_deps = 
   ${esp32_base.lib_deps}
-  bodmer/TFT_eSPI@^2.4.61
+  bodmer/TFT_eSPI@^2.4.61

variants/m5stack_core/variant.h

@@ -10,6 +10,9 @@
 
 #define BUTTON_PIN 38
 
+#define PIN_BUZZER 25
+#define TONE_PIN_CHANNEL 0
+
 #undef RF95_SCK
 #undef RF95_MISO
 #undef RF95_MOSI
@@ -32,11 +35,9 @@
 #define GPS_RX_PIN 16
 #define GPS_TX_PIN 17
 
-#define NO_GPS
-
 // Define if screen should be mirrored left to right
 #define SCREEN_ROTATE
 
 // LCD screens are slow, so slowdown the wipe so it looks better
 #define SCREEN_TRANSITION_MSECS 1
-#define SCREEN_TRANSITION_FRAMERATE 1 // fps
+#define SCREEN_TRANSITION_FRAMERATE 1 // fps