Merge branch 'fix/example_pdm_mic_recording' into 'master'

example: Fixed example I2S PDM microphone recording on sdcard

Closes IDF-3952 and IDFGH-5912

See merge request espressif/esp-idf!14928

components/driver/i2s.c

@@ -1550,10 +1550,10 @@ static esp_err_t i2s_check_cfg_validity(i2s_port_t i2s_num, i2s_hal_config_t *cf
     if (cfg->mode & I2S_MODE_PDM) {
         ESP_RETURN_ON_FALSE(i2s_num == I2S_NUM_0, ESP_ERR_INVALID_ARG, TAG, "I2S PDM mode only support on I2S0");
 #if !SOC_I2S_SUPPORTS_PDM_TX
-        ESP_RETURN_ON_FALSE(cfg->mode & I2S_MODE_TX, ESP_ERR_INVALID_ARG, TAG, "PDM does not support TX on this chip");
+        ESP_RETURN_ON_FALSE(!(cfg->mode & I2S_MODE_TX), ESP_ERR_INVALID_ARG, TAG, "PDM does not support TX on this chip");
 #endif // SOC_I2S_SUPPORTS_PDM_TX
 #if !SOC_I2S_SUPPORTS_PDM_RX
-        ESP_RETURN_ON_FALSE(cfg->mode & I2S_MODE_RX, ESP_ERR_INVALID_ARG, TAG, "PDM does not support RX on this chip");
+        ESP_RETURN_ON_FALSE(!(cfg->mode & I2S_MODE_RX), ESP_ERR_INVALID_ARG, TAG, "PDM does not support RX on this chip");
 #endif // SOC_I2S_SUPPORTS_PDM_RX
     }
 #else

components/hal/esp32c3/include/hal/i2s_ll.h

@@ -1,16 +1,8 @@
-// Copyright 2021 Espressif Systems (Shanghai) PTE LTD
+/*
-//
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
-// Licensed under the Apache License, Version 2.0 (the "License");
+ *
-// you may not use this file except in compliance with the License.
+ * SPDX-License-Identifier: Apache-2.0
-// You may obtain a copy of the License at
+ */
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 // The LL layer for I2S register operations
 /*******************************************************************************
@@ -86,6 +78,26 @@ static inline void i2s_ll_rx_enable_clock(i2s_dev_t *hw)
     hw->rx_clkm_conf.rx_clk_active = 1;
 }
 
+/**
+ * @brief Disable I2S tx module clock
+ *
+ * @param hw Peripheral I2S hardware instance address.
+ */
+static inline void i2s_ll_tx_disable_clock(i2s_dev_t *hw)
+{
+    hw->tx_clkm_conf.tx_clk_active = 0;
+}
+
+/**
+ * @brief Disable I2S rx module clock
+ *
+ * @param hw Peripheral I2S hardware instance address.
+ */
+static inline void i2s_ll_rx_disable_clock(i2s_dev_t *hw)
+{
+    hw->rx_clkm_conf.rx_clk_active = 0;
+}
+
 /**
  * @brief I2S mclk use tx module clock
  *

components/hal/esp32h2/include/hal/i2s_ll.h

@@ -1,16 +1,8 @@
-// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
+/*
-//
+ * SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
-// Licensed under the Apache License, Version 2.0 (the "License");
+ *
-// you may not use this file except in compliance with the License.
+ * SPDX-License-Identifier: Apache-2.0
-// You may obtain a copy of the License at
+ */
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 /*******************************************************************************
  * NOTICE
@@ -87,6 +79,26 @@ static inline void i2s_ll_rx_enable_clock(i2s_dev_t *hw)
     hw->rx_clkm_conf.rx_clk_active = 1;
 }
 
+/**
+ * @brief Disable I2S tx module clock
+ *
+ * @param hw Peripheral I2S hardware instance address.
+ */
+static inline void i2s_ll_tx_disable_clock(i2s_dev_t *hw)
+{
+    hw->tx_clkm_conf.tx_clk_active = 0;
+}
+
+/**
+ * @brief Disable I2S rx module clock
+ *
+ * @param hw Peripheral I2S hardware instance address.
+ */
+static inline void i2s_ll_rx_disable_clock(i2s_dev_t *hw)
+{
+    hw->rx_clkm_conf.rx_clk_active = 0;
+}
+
 /**
  * @brief I2S mclk use tx module clock
  *

components/hal/esp32s3/include/hal/i2s_ll.h

@@ -1,16 +1,8 @@
-// Copyright 2021 Espressif Systems (Shanghai) PTE LTD
+/*
-//
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
-// Licensed under the Apache License, Version 2.0 (the "License");
+ *
-// you may not use this file except in compliance with the License.
+ * SPDX-License-Identifier: Apache-2.0
-// You may obtain a copy of the License at
+ */
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 // The LL layer for I2S register operations
 /*******************************************************************************
@@ -87,6 +79,26 @@ static inline void i2s_ll_rx_enable_clock(i2s_dev_t *hw)
     hw->rx_clkm_conf.rx_clk_active = 1;
 }
 
+/**
+ * @brief Disable I2S tx module clock
+ *
+ * @param hw Peripheral I2S hardware instance address.
+ */
+static inline void i2s_ll_tx_disable_clock(i2s_dev_t *hw)
+{
+    hw->tx_clkm_conf.tx_clk_active = 0;
+}
+
+/**
+ * @brief Disable I2S rx module clock
+ *
+ * @param hw Peripheral I2S hardware instance address.
+ */
+static inline void i2s_ll_rx_disable_clock(i2s_dev_t *hw)
+{
+    hw->rx_clkm_conf.rx_clk_active = 0;
+}
+
 /**
  * @brief I2S mclk use tx module clock
  *

components/hal/i2s_hal.c

@@ -1,16 +1,8 @@
-// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
+/*
-//
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
-// Licensed under the Apache License, Version 2.0 (the "License");
+ *
-// you may not use this file except in compliance with the License.
+ * SPDX-License-Identifier: Apache-2.0
-// You may obtain a copy of the License at
+ */
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 
 // The HAL layer for I2S (common part)
@@ -104,6 +96,15 @@ void i2s_hal_tx_set_pdm_mode_default(i2s_hal_context_t *hal, uint32_t sample_rat
 {
     /* enable pdm tx mode */
     i2s_ll_tx_enable_pdm(hal->dev, true);
+#if SOC_I2S_SUPPORTS_TDM
+    i2s_ll_tx_enable_clock(hal->dev);
+    i2s_ll_tx_clk_set_src(hal->dev, I2S_CLK_D2CLK); // Set I2S_CLK_D2CLK as default
+    i2s_ll_mclk_use_tx_clk(hal->dev);
+    /* Still need to enable the first 2 TDM channel mask to get the correct number of frame */
+    i2s_ll_tx_set_active_chan_mask(hal->dev, I2S_TDM_ACTIVE_CH0 | I2S_TDM_ACTIVE_CH1);
+#else
+    i2s_ll_tx_force_enable_fifo_mod(hal->dev, true);
+#endif
     /* set pdm tx default presacle */
     i2s_ll_tx_set_pdm_prescale(hal->dev, 0);
     /* set pdm tx default sacle of high pass filter */
@@ -140,6 +141,18 @@ void i2s_hal_rx_set_pdm_mode_default(i2s_hal_context_t *hal)
     i2s_ll_rx_enable_pdm(hal->dev, true);
     /* set pdm rx downsample number */
     i2s_ll_rx_set_pdm_dsr(hal->dev, I2S_PDM_DSR_8S);
+#if !SOC_I2S_SUPPORTS_TDM
+    i2s_ll_rx_force_enable_fifo_mod(hal->dev, true);
+#endif
+#if SOC_I2S_SUPPORTS_TDM
+    i2s_ll_rx_enable_clock(hal->dev);
+    i2s_ll_rx_clk_set_src(hal->dev, I2S_CLK_D2CLK); // Set I2S_CLK_D2CLK as default
+    i2s_ll_mclk_use_rx_clk(hal->dev);
+    /* Still need to enable the first 2 TDM channel mask to get the correct number of frame */
+    i2s_ll_rx_set_active_chan_mask(hal->dev, I2S_TDM_ACTIVE_CH0 | I2S_TDM_ACTIVE_CH1);
+#else
+    i2s_ll_rx_force_enable_fifo_mod(hal->dev, true);
+#endif
 }
 #endif // SOC_I2S_SUPPORTS_PDM_RX
 
@@ -286,8 +299,8 @@ void i2s_hal_config_param(i2s_hal_context_t *hal, const i2s_hal_config_t *hal_cf
         {
             /* Set tx common mode */
             i2s_hal_tx_set_common_mode(hal, hal_cfg);
-            i2s_hal_tx_set_channel_style(hal, hal_cfg);
         }
+        i2s_hal_tx_set_channel_style(hal, hal_cfg);
     }
 
     /* Set configurations for RX mode */
@@ -304,8 +317,8 @@ void i2s_hal_config_param(i2s_hal_context_t *hal, const i2s_hal_config_t *hal_cf
         {
             /* Set rx common mode */
             i2s_hal_rx_set_common_mode(hal, hal_cfg);
-            i2s_hal_rx_set_channel_style(hal, hal_cfg);
         }
+        i2s_hal_rx_set_channel_style(hal, hal_cfg);
     }
 
     /* Set configurations for full-duplex mode */
@@ -318,3 +331,35 @@ void i2s_hal_config_param(i2s_hal_context_t *hal, const i2s_hal_config_t *hal_cf
         }
     }
 }
+
+void i2s_hal_start_tx(i2s_hal_context_t *hal)
+{
+#if SOC_I2S_SUPPORTS_TDM
+    i2s_ll_tx_enable_clock(hal->dev);
+#endif
+    i2s_ll_tx_start(hal->dev);
+}
+
+void i2s_hal_start_rx(i2s_hal_context_t *hal)
+{
+#if SOC_I2S_SUPPORTS_TDM
+    i2s_ll_rx_enable_clock(hal->dev);
+#endif
+    i2s_ll_rx_start(hal->dev);
+}
+
+void i2s_hal_stop_tx(i2s_hal_context_t *hal)
+{
+    i2s_ll_tx_stop(hal->dev);
+#if SOC_I2S_SUPPORTS_TDM
+    i2s_ll_tx_disable_clock(hal->dev);
+#endif
+}
+
+void i2s_hal_stop_rx(i2s_hal_context_t *hal)
+{
+    i2s_ll_rx_stop(hal->dev);
+#if SOC_I2S_SUPPORTS_TDM
+    i2s_ll_rx_disable_clock(hal->dev);
+#endif
+}

components/hal/include/hal/i2s_hal.h

@@ -1,16 +1,8 @@
-// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
+/*
-//
+ * SPDX-FileCopyrightText: 2020-2021 Espressif Systems (Shanghai) CO LTD
-// Licensed under the Apache License, Version 2.0 (the "License");
+ *
-// you may not use this file except in compliance with the License.
+ * SPDX-License-Identifier: Apache-2.0
-// You may obtain a copy of the License at
+ */
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 /*******************************************************************************
  * NOTICE
@@ -176,28 +168,28 @@ void i2s_hal_enable_slave_fd_mode(i2s_hal_context_t *hal);
  *
  * @param hal Context of the HAL layer
  */
-#define i2s_hal_start_tx(hal)               i2s_ll_tx_start((hal)->dev)
+void i2s_hal_start_tx(i2s_hal_context_t *hal);
 
 /**
  * @brief Start I2S rx
  *
  * @param hal Context of the HAL layer
  */
-#define i2s_hal_start_rx(hal)               i2s_ll_rx_start((hal)->dev)
+void i2s_hal_start_rx(i2s_hal_context_t *hal);
 
 /**
  * @brief Stop I2S tx
  *
  * @param hal Context of the HAL layer
  */
-#define i2s_hal_stop_tx(hal)                i2s_ll_tx_stop((hal)->dev)
+void i2s_hal_stop_tx(i2s_hal_context_t *hal);
 
 /**
  * @brief Stop I2S rx
  *
  * @param hal Context of the HAL layer
  */
-#define i2s_hal_stop_rx(hal)                i2s_ll_rx_stop((hal)->dev)
+void i2s_hal_stop_rx(i2s_hal_context_t *hal);
 
 /**
  * @brief Set the received data length to trigger `in_suc_eof` interrupt.

examples/peripherals/i2s/i2s_audio_recorder_sdcard/README.md

@@ -1,5 +1,5 @@
-| Supported Targets | ESP32 |
+| Supported Targets | ESP32 | ESP32-S3 |
-| ----------------- | ----- |
+| ----------------- | ----- | -------- |
 
 # I2S Digital Microphone Recording Example
 
@@ -18,7 +18,7 @@ The audio is recorded into the SDCard using WAVE file format.
 
 ### Hardware Required
 
-* A development board with ESP32 SoC (e.g., ESP32-DevKitC, ESP-WROVER-KIT, etc.)
+* A development board with ESP32 or ESP32S3 SoC (e.g., ESP32-DevKitC, ESP-WROVER-KIT, etc.)
 * A USB cable for power supply and programming
 * A digital microphone (SPK0838HT4H PDM output was used in this example)
 
@@ -28,17 +28,17 @@ The default GPIO configuration is the following:
 
 |Mic        | GPIO   |
 |:---------:|:------:|
-| PDM Clock | GPIO22 |
+| PDM Clock | GPIO4 |
-| PDM Data  | GPIO23 |
+| PDM Data  | GPIO5 |
 
 The SDCard is connected using SPI peripheral.
 
 | SPI  | SDCard |  GPIO  |
 |:----:|:------:|:------:|
-| MISO | DAT0   | GPIO2  |
+| MISO | DAT0   | GPIO17 |
-| MOSI | CMD    | GPIO15 |
+| MOSI | CMD    | GPIO16 |
-| SCLK | CLK    | GPIO14 |
+| SCLK | CLK    | GPIO18 |
-| CS   | CD     | GPIO13 |
+| CS   | CD     | GPIO19 |
 
 To change the GPIO configuration, see the `Example Configuration` from the menuconfig.
 

examples/peripherals/i2s/i2s_audio_recorder_sdcard/main/Kconfig.projbuild

@@ -4,25 +4,25 @@ menu "Example Configuration"
 
         config EXAMPLE_SPI_MISO_GPIO
             int "SPI MISO GPIO"
-            default 2
+            default 15
             help
                 Set the GPIO number used for MISO from SPI.
 
         config EXAMPLE_SPI_MOSI_GPIO
             int "SPI MOSI GPIO"
-            default 15
+            default 14
             help
                 Set the GPIO number used for MOSI from SPI.
 
         config EXAMPLE_SPI_SCLK_GPIO
             int "SPI SCLK GPIO"
-            default 14
+            default 18
             help
                 Set the GPIO number used for SCLK from SPI.
 
         config EXAMPLE_SPI_CS_GPIO
             int "SPI CS GPIO"
-            default 13
+            default 19
             help
                 Set the GPIO number used for CS from SPI.
 
@@ -36,13 +36,13 @@ menu "Example Configuration"
             help
                 Set the I2S channel number.
 
-        config EXAMPLE_AUDIO_SAMPLE_RATE
+        config EXAMPLE_SAMPLE_RATE
             int "Audio Sample Rate"
             default 44100
             help
                 Set the audio sample rate frequency. Usually 16000 or 44100 Hz.
 
-        config EXAMPLE_AUDIO_BIT_SAMPLE
+        config EXAMPLE_BIT_SAMPLE
             int "Audio Bit Sample"
             default 16
             help
@@ -50,13 +50,13 @@ menu "Example Configuration"
 
         config EXAMPLE_I2S_DATA_GPIO
             int "I2S Data GPIO"
-            default 23
+            default 5
             help
                 Set the GPIO number used for transmitting/receiving data from I2S.
 
         config EXAMPLE_I2S_CLK_GPIO
             int "I2S Clock GPIO"
-            default 22
+            default 4
             help
                 Set the GPIO number used for the clock line from I2S.
 

examples/peripherals/i2s/i2s_audio_recorder_sdcard/main/i2s_recorder_main.c

@@ -8,30 +8,28 @@
 */
 #include <stdio.h>
 #include <string.h>
+#include <math.h>
+#include <sys/unistd.h>
+#include <sys/stat.h>
+#include "esp_log.h"
+#include "esp_err.h"
+#include "esp_system.h"
+#include "esp_vfs_fat.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "driver/i2s.h"
 #include "driver/gpio.h"
-#include "esp_system.h"
-#include <math.h>
-#include "esp_log.h"
-#include <sys/unistd.h>
-#include <sys/stat.h>
-#include "esp_err.h"
-#include "esp_vfs_fat.h"
-#include "driver/sdspi_host.h"
 #include "driver/spi_common.h"
 #include "sdmmc_cmd.h"
 #include "sdkconfig.h"
 
 static const char* TAG = "pdm_rec_example";
 
-#define AUDIO_SAMPLE_SIZE       (CONFIG_EXAMPLE_AUDIO_BIT_SAMPLE * 1024)
+#define SPI_DMA_CHAN        SPI_DMA_CH_AUTO
-#define SAMPLES_NUM             ((CONFIG_EXAMPLE_AUDIO_SAMPLE_RATE/100) * 2)
+#define NUM_CHANNELS        (1) // For mono recording only!
-#define BYTE_RATE               (1 * CONFIG_EXAMPLE_AUDIO_SAMPLE_RATE * ((CONFIG_EXAMPLE_AUDIO_BIT_SAMPLE / 8))
-#define FLASH_RECORD_SIZE       (BYTE_RATE * CONFIG_EXAMPLE_REC_TIME))
 #define SD_MOUNT_POINT      "/sdcard"
-#define SPI_DMA_CHAN            (1)
+#define SAMPLE_SIZE         (CONFIG_EXAMPLE_BIT_SAMPLE * 1024)
+#define BYTE_RATE           (CONFIG_EXAMPLE_SAMPLE_RATE * (CONFIG_EXAMPLE_BIT_SAMPLE / 8)) * NUM_CHANNELS
 
 // When testing SD and SPI modes, keep in mind that once the card has been
 // initialized in SPI mode, it can not be reinitialized in SD mode without
@@ -39,7 +37,7 @@ static const char* TAG = "pdm_rec_example";
 sdmmc_host_t host = SDSPI_HOST_DEFAULT();
 sdmmc_card_t* card;
 
-static int16_t i2s_readraw_buff[AUDIO_SAMPLE_SIZE];
+static int16_t i2s_readraw_buff[SAMPLE_SIZE];
 size_t bytes_read;
 const int WAVE_HEADER_SIZE = 44;
 
@@ -52,17 +50,10 @@ void mount_sdcard(void)
     esp_vfs_fat_sdmmc_mount_config_t mount_config = {
         .format_if_mount_failed = true,
         .max_files = 5,
-        .allocation_unit_size = 16 * 1024
+        .allocation_unit_size = 8 * 1024
     };
     ESP_LOGI(TAG, "Initializing SD card");
 
-    // Use settings defined above to initialize SD card and mount FAT filesystem.
-    // Note: esp_vfs_fat_sdmmc/sdspi_mount is all-in-one convenience functions.
-    // Please check its source code and implement error recovery when developing
-    // production applications.
-
-    ESP_LOGI(TAG, "Using SPI peripheral");
-
     spi_bus_config_t bus_cfg = {
         .mosi_io_num = CONFIG_EXAMPLE_SPI_MOSI_GPIO,
         .miso_io_num = CONFIG_EXAMPLE_SPI_MISO_GPIO,
@@ -87,8 +78,7 @@ void mount_sdcard(void)
 
     if (ret != ESP_OK) {
         if (ret == ESP_FAIL) {
-            ESP_LOGE(TAG, "Failed to mount filesystem. "
+            ESP_LOGE(TAG, "Failed to mount filesystem.");
-                "If you want the card to be formatted, set the EXAMPLE_FORMAT_IF_MOUNT_FAILED menuconfig option.");
         } else {
             ESP_LOGE(TAG, "Failed to initialize the card (%s). "
                 "Make sure SD card lines have pull-up resistors in place.", esp_err_to_name(ret));
@@ -100,11 +90,11 @@ void mount_sdcard(void)
     sdmmc_card_print_info(stdout, card);
 }
 
-void wavHeader(char* wav_header, uint32_t wav_size, uint32_t sample_rate){
+void generate_wav_header(char* wav_header, uint32_t wav_size, uint32_t sample_rate){
 
     // See this for reference: http://soundfile.sapp.org/doc/WaveFormat/
     uint32_t file_size = wav_size + WAVE_HEADER_SIZE - 8;
-    uint32_t byte_rate = 1 * CONFIG_EXAMPLE_AUDIO_SAMPLE_RATE * (CONFIG_EXAMPLE_AUDIO_BIT_SAMPLE / 8);
+    uint32_t byte_rate = BYTE_RATE;
 
     const char set_wav_header[] = {
         'R','I','F','F', // ChunkID
@@ -125,14 +115,16 @@ const char set_wav_header[] = {
     memcpy(wav_header, set_wav_header, sizeof(set_wav_header));
 }
 
-void record_wav(void)
+void record_wav(uint32_t rec_time)
 {
     // Use POSIX and C standard library functions to work with files.
     int flash_wr_size = 0;
     ESP_LOGI(TAG, "Opening file");
 
     char wav_header_fmt[WAVE_HEADER_SIZE];
-    wavHeader(wav_header_fmt, FLASH_RECORD_SIZE, CONFIG_EXAMPLE_AUDIO_SAMPLE_RATE);
+
+    uint32_t flash_rec_time = BYTE_RATE * rec_time;
+    generate_wav_header(wav_header_fmt, flash_rec_time, CONFIG_EXAMPLE_SAMPLE_RATE);
 
     // First check if file exists before creating a new file.
     struct stat st;
@@ -152,9 +144,9 @@ void record_wav(void)
     fwrite(wav_header_fmt, 1, WAVE_HEADER_SIZE, f);
 
     // Start recording
-    while (flash_wr_size < FLASH_RECORD_SIZE) {
+    while (flash_wr_size < flash_rec_time) {
         // Read the RAW samples from the microphone
-        i2s_read(CONFIG_EXAMPLE_I2S_CH, (char *)i2s_readraw_buff, AUDIO_SAMPLE_SIZE, &bytes_read, portMAX_DELAY);
+        i2s_read(CONFIG_EXAMPLE_I2S_CH, (char *)i2s_readraw_buff, SAMPLE_SIZE, &bytes_read, 100);
         // Write the samples to the WAV file
         fwrite(i2s_readraw_buff, 1, bytes_read, f);
         flash_wr_size += bytes_read;
@@ -173,27 +165,32 @@ void record_wav(void)
 
 void init_microphone(void)
 {
+    // Set the I2S configuration as PDM and 16bits per sample
     i2s_config_t i2s_config = {
         .mode = I2S_MODE_MASTER | I2S_MODE_RX | I2S_MODE_PDM,
-        .sample_rate = CONFIG_EXAMPLE_AUDIO_SAMPLE_RATE,
+        .sample_rate = CONFIG_EXAMPLE_SAMPLE_RATE,
         .bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT,
         .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,
         .communication_format = I2S_COMM_FORMAT_STAND_I2S,
-        .intr_alloc_flags = ESP_INTR_FLAG_LEVEL1,
+        .intr_alloc_flags = ESP_INTR_FLAG_LEVEL2,
-        .dma_buf_count = 64,
+        .dma_buf_count = 8,
-        .dma_buf_len = 1024,
+        .dma_buf_len = 200,
-        .use_apll = 1
+        .use_apll = 0,
     };
 
-    i2s_pin_config_t pin_config;
+    // Set the pinout configuration (set using menuconfig)
-    pin_config.bck_io_num = I2S_PIN_NO_CHANGE;
+    i2s_pin_config_t pin_config = {
-    pin_config.ws_io_num = CONFIG_EXAMPLE_I2S_CLK_GPIO;
+        .mck_io_num = I2S_PIN_NO_CHANGE,
-    pin_config.data_out_num = I2S_PIN_NO_CHANGE;
+        .bck_io_num = I2S_PIN_NO_CHANGE,
-    pin_config.data_in_num = CONFIG_EXAMPLE_I2S_DATA_GPIO;
+        .ws_io_num = CONFIG_EXAMPLE_I2S_CLK_GPIO,
+        .data_out_num = I2S_PIN_NO_CHANGE,
+        .data_in_num = CONFIG_EXAMPLE_I2S_DATA_GPIO,
+    };
 
-    i2s_driver_install(CONFIG_EXAMPLE_I2S_CH, &i2s_config, 0, NULL);
+    // Call driver installation function before any I2S R/W operation.
-    i2s_set_pin(CONFIG_EXAMPLE_I2S_CH, &pin_config);
+    ESP_ERROR_CHECK( i2s_driver_install(CONFIG_EXAMPLE_I2S_CH, &i2s_config, 0, NULL) );
-    i2s_set_clk(CONFIG_EXAMPLE_I2S_CH, CONFIG_EXAMPLE_AUDIO_SAMPLE_RATE, I2S_BITS_PER_SAMPLE_16BIT, I2S_CHANNEL_MONO);
+    ESP_ERROR_CHECK( i2s_set_pin(CONFIG_EXAMPLE_I2S_CH, &pin_config) );
+    ESP_ERROR_CHECK( i2s_set_clk(CONFIG_EXAMPLE_I2S_CH, CONFIG_EXAMPLE_SAMPLE_RATE, I2S_BITS_PER_SAMPLE_16BIT, I2S_CHANNEL_MONO) );
 }
 
 void app_main(void)
@@ -205,5 +202,7 @@ void app_main(void)
     init_microphone();
     ESP_LOGI(TAG, "Starting recording for %d seconds!", CONFIG_EXAMPLE_REC_TIME);
     // Start Recording
-    record_wav();
+    record_wav(CONFIG_EXAMPLE_REC_TIME);
+    // Stop I2S driver and destroy
+    ESP_ERROR_CHECK( i2s_driver_uninstall(CONFIG_EXAMPLE_I2S_CH) );
 }

tools/ci/check_copyright_ignore.txt

@@ -1517,7 +1517,6 @@ components/hal/esp32c3/include/hal/gpspi_flash_ll.h
 components/hal/esp32c3/include/hal/hmac_hal.h
 components/hal/esp32c3/include/hal/hmac_ll.h
 components/hal/esp32c3/include/hal/i2c_ll.h
-components/hal/esp32c3/include/hal/i2s_ll.h
 components/hal/esp32c3/include/hal/interrupt_controller_ll.h
 components/hal/esp32c3/include/hal/ledc_ll.h
 components/hal/esp32c3/include/hal/memprot_ll.h
@@ -1555,7 +1554,6 @@ components/hal/esp32h2/include/hal/gpspi_flash_ll.h
 components/hal/esp32h2/include/hal/hmac_hal.h
 components/hal/esp32h2/include/hal/hmac_ll.h
 components/hal/esp32h2/include/hal/i2c_ll.h
-components/hal/esp32h2/include/hal/i2s_ll.h
 components/hal/esp32h2/include/hal/interrupt_controller_ll.h
 components/hal/esp32h2/include/hal/ledc_ll.h
 components/hal/esp32h2/include/hal/memprot_ll.h
@@ -1634,7 +1632,6 @@ components/hal/esp32s3/include/hal/gdma_ll.h
 components/hal/esp32s3/include/hal/gpio_ll.h
 components/hal/esp32s3/include/hal/gpspi_flash_ll.h
 components/hal/esp32s3/include/hal/i2c_ll.h
-components/hal/esp32s3/include/hal/i2s_ll.h
 components/hal/esp32s3/include/hal/interrupt_controller_ll.h
 components/hal/esp32s3/include/hal/lcd_ll.h
 components/hal/esp32s3/include/hal/ledc_ll.h
@@ -1669,7 +1666,6 @@ components/hal/gdma_hal.c
 components/hal/gpio_hal.c
 components/hal/i2c_hal.c
 components/hal/i2c_hal_iram.c
-components/hal/i2s_hal.c
 components/hal/include/hal/adc_hal.h
 components/hal/include/hal/adc_types.h
 components/hal/include/hal/aes_hal.h
@@ -1689,7 +1685,6 @@ components/hal/include/hal/gpio_hal.h
 components/hal/include/hal/gpio_types.h
 components/hal/include/hal/i2c_hal.h
 components/hal/include/hal/i2c_types.h
-components/hal/include/hal/i2s_hal.h
 components/hal/include/hal/i2s_types.h
 components/hal/include/hal/interrupt_controller_hal.h
 components/hal/include/hal/interrupt_controller_types.h