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+/*
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+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
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+ *
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+ * SPDX-License-Identifier: CC0-1.0
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+ */
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+
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+#include <stdio.h>
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+#include <string.h>
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+#include "freertos/FreeRTOS.h"
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+#include "freertos/task.h"
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+#include "driver/i2s.h"
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+#include "esp_system.h"
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+#include "esp_check.h"
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+#include "es8311.h"
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+
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+/* I2C port and GPIOs */
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+#define I2C_NUM (0)
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+#ifdef CONFIG_IDF_TARGET_ESP32C3
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+#define I2C_SDA_IO (GPIO_NUM_17)
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+#define I2C_SCL_IO (GPIO_NUM_16)
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+#else
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+#define I2C_SDA_IO (GPIO_NUM_15)
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+#define I2C_SCL_IO (GPIO_NUM_14)
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+#endif
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+
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+/* I2S port and GPIOs */
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+#define I2S_NUM (0)
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+#define I2S_MCK_IO (GPIO_NUM_0)
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+#define I2S_BCK_IO (GPIO_NUM_4)
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+#define I2S_WS_IO (GPIO_NUM_5)
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+#define I2S_DO_IO (GPIO_NUM_18)
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+#define I2S_DI_IO (GPIO_NUM_19)
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+
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+/* Example configurations */
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+#define EXAMPLE_RECV_BUF_SIZE (2048)
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+#define EXAMPLE_SAMPLE_RATE (16000)
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+#define EXAMPLE_MCLK_MULTIPLE I2S_MCLK_MULTIPLE_256
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+#define EXAMPLE_VOICE_VOLUME CONFIG_EXAMPLE_VOICE_VOLUME
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+#if CONFIG_EXAMPLE_MODE_ECHO
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+#define EXAMPLE_MIC_GAIN CONFIG_EXAMPLE_MIC_GAIN
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+#endif
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+
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+static const char *TAG = "i2s_es8311";
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+static const char err_reason[][30] = {"input param is invalid",
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+ "operation timeout"
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+ };
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+
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+/* Import music file as buffer */
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+#if CONFIG_EXAMPLE_MODE_MUSIC
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+extern const uint8_t music_pcm_start[] asm("_binary_canon_pcm_start");
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+extern const uint8_t music_pcm_end[] asm("_binary_canon_pcm_end");
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+#endif
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+
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+static esp_err_t es8311_codec_init(void)
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+{
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+ /* Initialize I2C peripheral */
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+ i2c_config_t es_i2c_cfg = {
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+ .sda_io_num = I2C_SDA_IO,
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+ .scl_io_num = I2C_SCL_IO,
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+ .mode = I2C_MODE_MASTER,
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+ .sda_pullup_en = GPIO_PULLUP_ENABLE,
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+ .scl_pullup_en = GPIO_PULLUP_ENABLE,
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+ .master.clk_speed = 100000,
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+ };
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+ ESP_RETURN_ON_ERROR(i2c_param_config(I2C_NUM, &es_i2c_cfg), TAG, "config i2c failed");
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+ ESP_RETURN_ON_ERROR(i2c_driver_install(I2C_NUM, I2C_MODE_MASTER, 0, 0, 0), TAG, "install i2c driver failed");
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+
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+ /* Initialize es8311 codec */
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+ es8311_handle_t es_handle = es8311_create(I2C_NUM, ES8311_ADDRRES_0);
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+ ESP_RETURN_ON_FALSE(es_handle, ESP_FAIL, TAG, "es8311 create failed");
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+ es8311_clock_config_t es_clk = {
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+ .mclk_from_mclk_pin = true,
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+ .sample_frequency = EXAMPLE_SAMPLE_RATE
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+ };
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+
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+ es8311_init(es_handle, &es_clk, ES8311_RESOLUTION_16, ES8311_RESOLUTION_16);
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+ ESP_RETURN_ON_ERROR(es8311_sample_frequency_config(es_handle, EXAMPLE_SAMPLE_RATE * EXAMPLE_MCLK_MULTIPLE, EXAMPLE_SAMPLE_RATE), TAG, "set es8311 sample frequency failed");
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+ ESP_RETURN_ON_ERROR(es8311_voice_volume_set(es_handle, EXAMPLE_VOICE_VOLUME, NULL), TAG, "set es8311 volume failed");
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+ ESP_RETURN_ON_ERROR(es8311_microphone_config(es_handle, false), TAG, "set es8311 microphone failed");
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+#if CONFIG_EXAMPLE_MODE_ECHO
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+ ESP_RETURN_ON_ERROR(es8311_microphone_gain_set(es_handle, EXAMPLE_MIC_GAIN), TAG, "set es8311 microphone gain faield");
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+#endif
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+ return ESP_OK;
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+}
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+
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+static esp_err_t i2s_driver_init(void)
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+{
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+ i2s_config_t i2s_cfg = {
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+ .mode = I2S_MODE_MASTER | I2S_MODE_TX | I2S_MODE_RX,
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+ .sample_rate = EXAMPLE_SAMPLE_RATE,
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+ .bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT,
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+ .channel_format = I2S_CHANNEL_FMT_RIGHT_LEFT,
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+ .communication_format = I2S_COMM_FORMAT_STAND_I2S,
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+ .tx_desc_auto_clear = true,
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+#if SOC_I2S_SUPPORTS_TDM
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+ .total_chan = 2,
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+ .chan_mask = I2S_TDM_ACTIVE_CH0 | I2S_TDM_ACTIVE_CH1,
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+ .left_align = false,
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+ .big_edin = false,
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+ .bit_order_msb = false,
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+ .skip_msk = false,
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+#endif
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+ .dma_buf_count = 8,
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+ .dma_buf_len = 64,
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+ .use_apll = false,
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+ .mclk_multiple = EXAMPLE_MCLK_MULTIPLE,
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+ .intr_alloc_flags = ESP_INTR_FLAG_LEVEL1,
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+ };
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+
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+ ESP_RETURN_ON_ERROR(i2s_driver_install(I2S_NUM, &i2s_cfg, 0, NULL), TAG, "install i2s failed");
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+ i2s_pin_config_t i2s_pin_cfg = {
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+ .mck_io_num = I2S_MCK_IO,
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+ .bck_io_num = I2S_BCK_IO,
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+ .ws_io_num = I2S_WS_IO,
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+ .data_out_num = I2S_DO_IO,
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+ .data_in_num = I2S_DI_IO
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+ };
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+ ESP_RETURN_ON_ERROR(i2s_set_pin(I2S_NUM, &i2s_pin_cfg), TAG, "set i2s pins failed");
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+ return ESP_OK;
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+}
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+
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+#if CONFIG_EXAMPLE_MODE_MUSIC
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+static void i2s_music(void *args)
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+{
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+ esp_err_t ret = ESP_OK;
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+ size_t bytes_write = 0;
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+ while (1) {
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+ /* Write music to earphone */
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+ ret = i2s_write(I2S_NUM, music_pcm_start, music_pcm_end - music_pcm_start, &bytes_write, portMAX_DELAY);
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+ if (ret != ESP_OK) {
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+ /* Since we set timeout to 'portMAX_DELAY' in 'i2s_write'
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+ so you won't reach here unless you set other timeout value,
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+ if timeout detected, it means write operation failed. */
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+ ESP_LOGE(TAG, "[music] i2s read failed, %s", err_reason[ret == ESP_ERR_TIMEOUT]);
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+ abort();
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+ }
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+ /* Clear DMA buffer to avoid noise from legacy data in buffer */
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+ i2s_zero_dma_buffer(I2S_NUM);
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+ if (bytes_write > 0) {
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+ ESP_LOGI(TAG, "[music] i2s music played, %d bytes are written.", bytes_write);
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+ } else {
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+ ESP_LOGE(TAG, "[music] i2s music play falied.");
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+ abort();
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+ }
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+ vTaskDelay(1000 / portTICK_RATE_MS);
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+ }
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+ vTaskDelete(NULL);
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+}
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+
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+#else
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+static void i2s_echo(void *args)
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+{
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+ int *mic_data = malloc(EXAMPLE_RECV_BUF_SIZE);
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+ if (!mic_data) {
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+ ESP_LOGE(TAG, "[echo] No memory for read data buffer");
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+ abort();
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+ }
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+ esp_err_t ret = ESP_OK;
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+ size_t bytes_read = 0;
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+ size_t bytes_write = 0;
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+ ESP_LOGI(TAG, "[echo] Echo start");
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+
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+ while (1) {
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+ memset(mic_data, 0, EXAMPLE_RECV_BUF_SIZE);
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+ /* Read sample data from mic */
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+ ret = i2s_read(I2S_NUM, mic_data, EXAMPLE_RECV_BUF_SIZE, &bytes_read, 100);
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+ if (ret != ESP_OK) {
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+ ESP_LOGE(TAG, "[echo] i2s read failed, %s", err_reason[ret == ESP_ERR_TIMEOUT]);
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+ abort();
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+ }
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+ /* Write sample data to earphone */
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+ ret = i2s_write(I2S_NUM, mic_data, EXAMPLE_RECV_BUF_SIZE, &bytes_write, 100);
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+ if (ret != ESP_OK) {
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+ ESP_LOGE(TAG, "[echo] i2s write failed, %s", err_reason[ret == ESP_ERR_TIMEOUT]);
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+ abort();
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+ }
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+ if (bytes_read != bytes_write) {
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+ ESP_LOGW(TAG, "[echo] %d bytes read but only %d bytes are written", bytes_read, bytes_write);
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+ }
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+ }
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+ vTaskDelete(NULL);
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+}
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+#endif
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+
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+void app_main(void)
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+{
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+ /* Initialize i2s peripheral */
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+ if (i2s_driver_init() != ESP_OK) {
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+ ESP_LOGE(TAG, "i2s driver init failed");
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+ abort();
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+ }
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+ /* Initialize i2c peripheral and config es8311 codec by i2c */
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+ if (es8311_codec_init() != ESP_OK) {
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+ ESP_LOGE(TAG, "es8311 codec init failed");
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+ abort();
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+ }
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+#if CONFIG_EXAMPLE_MODE_MUSIC
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+ /* Play a piece of music in music mode */
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+ xTaskCreate(i2s_music, "i2s_music", 4096, NULL, 5, NULL);
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+#else
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+ /* Echo the sound from MIC in echo mode */
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+ xTaskCreate(i2s_echo, "i2s_echo", 8192, NULL, 5, NULL);
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+#endif
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+}
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laokaiyao