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Rebase and removed the sample rate division by 2

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pedro.minatel
2021-09-13 10:07:19 +01:00
committed by laokaiyao
parent 5e53ff825e
commit ae6e2aa687
1 changed files with 10 additions and 17 deletions
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27
examples/peripherals/i2s/i2s_audio_recorder_sdcard/main/i2s_recorder_main.c
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@@ -25,10 +25,11 @@
static const char* TAG = "pdm_rec_example"; static const char* TAG = "pdm_rec_example";
#define SPI_DMA_CHAN (1) #define SPI_DMA_CHAN (1)
#define SD_MOUNT_POINT "/sdcard" #define NUM_CHANNELS (1) // For mono recording only!
#define SAMPLE_SIZE (CONFIG_EXAMPLE_BIT_SAMPLE * 1024) #define SD_MOUNT_POINT "/sdcard"
#define BYTE_RATE 1 * CONFIG_EXAMPLE_SAMPLE_RATE * (CONFIG_EXAMPLE_BIT_SAMPLE / 8) #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 // 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 // initialized in SPI mode, it can not be reinitialized in SD mode without
@@ -49,17 +50,10 @@ void mount_sdcard(void)
esp_vfs_fat_sdmmc_mount_config_t mount_config = { esp_vfs_fat_sdmmc_mount_config_t mount_config = {
.format_if_mount_failed = true, .format_if_mount_failed = true,
.max_files = 5, .max_files = 5,
.allocation_unit_size = 16 * 1024 .allocation_unit_size = 8 * 1024
}; };
ESP_LOGI(TAG, "Initializing SD card"); 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 = { spi_bus_config_t bus_cfg = {
.mosi_io_num = CONFIG_EXAMPLE_SPI_MOSI_GPIO, .mosi_io_num = CONFIG_EXAMPLE_SPI_MOSI_GPIO,
.miso_io_num = CONFIG_EXAMPLE_SPI_MISO_GPIO, .miso_io_num = CONFIG_EXAMPLE_SPI_MISO_GPIO,
@@ -84,8 +78,7 @@ void mount_sdcard(void)
if (ret != ESP_OK) { if (ret != ESP_OK) {
if (ret == ESP_FAIL) { 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 { } else {
ESP_LOGE(TAG, "Failed to initialize the card (%s). " 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)); "Make sure SD card lines have pull-up resistors in place.", esp_err_to_name(ret));
@@ -173,7 +166,7 @@ void record_wav(uint32_t rec_time)
void init_microphone(void) void init_microphone(void)
{ {
// Set the I2S configuration as PDM 16bits per sample // Set the I2S configuration as PDM and 16bits per sample
i2s_config_t i2s_config = { i2s_config_t i2s_config = {
.mode = I2S_MODE_MASTER | I2S_MODE_RX | I2S_MODE_PDM, .mode = I2S_MODE_MASTER | I2S_MODE_RX | I2S_MODE_PDM,
.sample_rate = CONFIG_EXAMPLE_SAMPLE_RATE, .sample_rate = CONFIG_EXAMPLE_SAMPLE_RATE,
@@ -181,7 +174,7 @@ void init_microphone(void)
.channel_format = I2S_CHANNEL_FMT_ONLY_LEFT, .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,
.communication_format = I2S_COMM_FORMAT_STAND_I2S, .communication_format = I2S_COMM_FORMAT_STAND_I2S,
.intr_alloc_flags = ESP_INTR_FLAG_LEVEL2, .intr_alloc_flags = ESP_INTR_FLAG_LEVEL2,
.dma_buf_count = 16, .dma_buf_count = 8,
.dma_buf_len = 1024, .dma_buf_len = 1024,
.use_apll = 1, .use_apll = 1,
}; };
@@ -198,7 +191,7 @@ void init_microphone(void)
// Call driver installation function before any I2S R/W operation. // Call driver installation function before any I2S R/W operation.
ESP_ERROR_CHECK( i2s_driver_install(CONFIG_EXAMPLE_I2S_CH, &i2s_config, 0, NULL) ); ESP_ERROR_CHECK( i2s_driver_install(CONFIG_EXAMPLE_I2S_CH, &i2s_config, 0, NULL) );
ESP_ERROR_CHECK( i2s_set_pin(CONFIG_EXAMPLE_I2S_CH, &pin_config) ); 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 / 2), I2S_BITS_PER_SAMPLE_16BIT, I2S_CHANNEL_MONO) ); 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) void app_main(void)