zephyrCommon: Make configurable the max number of tones

Allows you to change the maximum number of notes that can be
played with `tone()`.

Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@gmail.com>

Author: soburi

Kconfig

@@ -34,4 +34,8 @@ config ARDUINO_ENTRY
 	bool "Provide arduino setup and loop entry points"
 	default y
 
+config ARDUINO_MAX_TONES
+	int "Specify the number of sounds that can be played simultaneously with tone()"
+	default -1
+
 endif

cores/arduino/zephyrCommon.cpp

@@ -212,8 +212,10 @@ PinStatus digitalRead(pin_size_t pinNumber) {
   return (gpio_pin_get_dt(&arduino_pins[pinNumber]) == 1) ? HIGH : LOW;
 }
 
-#ifndef MAX_TONE_PINS
+#if CONFIG_ARDUINO_MAX_TONES == -1
 #define MAX_TONE_PINS DT_PROP_LEN(DT_PATH(zephyr_user), digital_pin_gpios)
+#else
+#define MAX_TONE_PINS CONFIG_ARDUINO_MAX_TONES
 #endif
 
 #define TOGGLES_PER_CYCLE 2ULL