made some fix to the ESP32 I2S simple tone example

Author: greenyleaf

libraries/ESP_I2S/examples/Simple_tone/Simple_tone.ino

@@ -24,6 +24,8 @@
  2nd September 2021
  Lucas Saavedra Vaz (lucasssvaz)
  22nd December 2023
+ anonZ
+ 10nd February 2025
  */
 
 #include <ESP_I2S.h>
@@ -36,21 +38,24 @@ i2s_data_bit_width_t bps = I2S_DATA_BIT_WIDTH_16BIT;
 i2s_mode_t mode = I2S_MODE_STD;
 i2s_slot_mode_t slot = I2S_SLOT_MODE_STEREO;
 
-const int halfWavelength = (sampleRate / frequency);  // half wavelength of square wave
+const int halfWavelength = (sampleRate / frequency / 2);  // half wavelength of square wave
 
 int32_t sample = amplitude;  // current sample value
-int count = 0;
+unsigned int count = 0;
 
 I2SClass i2s;
 
 void setup() {
   Serial.begin(115200);
   Serial.println("I2S simple tone");
 
+  i2s.setPins(5, 25, 26);
+
   // start I2S at the sample rate with 16-bits per sample
   if (!i2s.begin(mode, sampleRate, bps, slot)) {
     Serial.println("Failed to initialize I2S!");
-    while (1);  // do nothing
+    while (1)
+      ;  // do nothing
   }
 }
 
@@ -61,7 +66,9 @@ void loop() {
   }
 
   i2s.write(sample);  // Right channel
+  i2s.write(sample >> 8);
   i2s.write(sample);  // Left channel
+  i2s.write(sample >> 8);
 
   // increment the counter for the next sample
   count++;