Created
December 23, 2020 19:15
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#include <driver/i2s.h> | |
#define I2S_WS 15 | |
#define I2S_SD 13 | |
#define I2S_SCK 2 | |
#define I2S_PORT I2S_NUM_0 | |
void setup() { | |
Serial.begin(115200); | |
Serial.println("Setup I2S ..."); | |
delay(1000); | |
i2s_install(); | |
i2s_setpin(); | |
i2s_start(I2S_PORT); | |
delay(500); | |
} | |
void loop() { | |
int32_t sample = 0; | |
int bytes = i2s_pop_sample(I2S_PORT, (char*)&sample, portMAX_DELAY); | |
if(bytes > 0){ | |
Serial.println(sample); | |
} | |
} | |
void i2s_install(){ | |
const i2s_config_t i2s_config = { | |
.mode = i2s_mode_t(I2S_MODE_MASTER | I2S_MODE_RX), | |
.sample_rate = 44100, | |
.bits_per_sample = i2s_bits_per_sample_t(16), | |
.channel_format = I2S_CHANNEL_FMT_ONLY_LEFT, | |
.communication_format = i2s_comm_format_t(I2S_COMM_FORMAT_I2S | I2S_COMM_FORMAT_I2S_MSB), | |
.intr_alloc_flags = 0, // default interrupt priority | |
.dma_buf_count = 8, | |
.dma_buf_len = 64, | |
.use_apll = false | |
}; | |
i2s_driver_install(I2S_PORT, &i2s_config, 0, NULL); | |
} | |
void i2s_setpin(){ | |
const i2s_pin_config_t pin_config = { | |
.bck_io_num = I2S_SCK, | |
.ws_io_num = I2S_WS, | |
.data_out_num = -1, | |
.data_in_num = I2S_SD | |
}; | |
i2s_set_pin(I2S_PORT, &pin_config); | |
} |
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