esp32:i2s
MH-ET LIVE Omnidirectional Microphone Module I2S Interface INMP441 MEMS High Precision Low Power Ultra small volume for ESP32
esp32 i2s microphone
tik l/r ruti buti GRND
https://github.com/maspetsberger/esp32-i2s-mems
veikia man ir 16 ir 32 bitai: I2S_BITS_PER_SAMPLE_16BIT I2S_BITS_PER_SAMPLE_32BIT
sample_rate maziausias 4000, didziausias 48000
ne sitas SPH0645 I2S MEMS Microphone
SEL is unconnected, i.e. only one channel, apparently left
if (bytes_read > 0 and sample != 0) {
// The I2S config as per the example
const i2s_config_t i2s_config = {
.mode = i2s_mode_t(I2S_MODE_MASTER | I2S_MODE_RX), // Receive, not transfer
//.mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_RX | I2S_MODE_TX | I2S_MODE_DAC_BUILT_IN | I2S_MODE_ADC_BUILT_IN),
.sample_rate = SAMPLE_RATE, // 48000, 44100, // // 16KHz
.bits_per_sample = I2S_BITS_PER_SAMPLE_32BIT, // could only get it to work with 32bits
.channel_format = I2S_CHANNEL_FMT_ONLY_LEFT, // although the SEL config should be left, it seems to transmit on right
//.channel_format = I2S_CHANNEL_FMT_ONLY_RIGHT,
//.channel_format = I2S_CHANNEL_FMT_RIGHT_LEFT,
.communication_format = (i2s_comm_format_t)(I2S_COMM_FORMAT_I2S | I2S_COMM_FORMAT_I2S_MSB),
//.intr_alloc_flags = ESP_INTR_FLAG_LEVEL1, // Interrupt level 1
// .dma_buf_count = 16, // number of buffers
// .dma_buf_len = 80 // 8 samples per buffer (minimum)
.intr_alloc_flags = 0,
//.intr_alloc_flags = ESP_INTR_FLAG_LEVEL1, // Interrupt level 1
.dma_buf_count = 16,
.dma_buf_len = 1024
};
ir L/R turi buti pajungtas ant grnd
esp32/i2s.txt · Last modified: by aistis