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Fix(I2S example): make fix to the ESP32 I2S simple tone example (#10954)

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* made some fix to the ESP32 I2S simple tone example

* edit the I2S - simple tone example

* edit the I2S - simple tone example

* some edit

* edit comment

* edit

* edit

* ci(pre-commit): Apply automatic fixes

---------

Co-authored-by: pre-commit-ci-lite[bot] <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com>
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whatsABetterNick 2025-06-10 18:27:47 +08:00 committed by GitHub
parent c21ef70a15
commit d71135e2ca
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1 changed files with 18 additions and 4 deletions
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22
libraries/ESP_I2S/examples/Simple_tone/Simple_tone.ino
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@ -24,10 +24,17 @@
2nd September 2021
Lucas Saavedra Vaz (lucasssvaz)
22nd December 2023
anon
10nd February 2025
*/
#include <ESP_I2S.h>
// The GPIO pins are not fixed, most other pins could be used for the I2S function.
#define I2S_LRC 25
#define I2S_BCLK 5
#define I2S_DIN 26
const int frequency = 440; // frequency of square wave in Hz
const int amplitude = 500; // amplitude of square wave
const int sampleRate = 8000; // sample rate in Hz
@ -36,10 +43,10 @@ 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 unsigned 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;
@ -47,6 +54,8 @@ void setup() {
Serial.begin(115200);
Serial.println("I2S simple tone");
i2s.setPins(I2S_BCLK, I2S_LRC, I2S_DIN);
// start I2S at the sample rate with 16-bits per sample
if (!i2s.begin(mode, sampleRate, bps, slot)) {
Serial.println("Failed to initialize I2S!");
@ -60,8 +69,13 @@ void loop() {
sample = -1 * sample;
}
i2s.write(sample); // Right channel
i2s.write(sample); // Left channel
// Left channel, the low 8 bits then high 8 bits
i2s.write(sample);
i2s.write(sample >> 8);
// Right channel, the low 8 bits then high 8 bits
i2s.write(sample);
i2s.write(sample >> 8);
// increment the counter for the next sample
count++;