1、编写 init_i2s 函数,初始化 i2s 接口。 //I2S通道句柄statici2s_chan_handle_t iis_tx_ch;staticvoidinit_i2s() {//1、创建通道i2s_chan_config_t chcfg =I2S_CHANNEL_DEFAULT_CONFIG(I2S_NUM_0, I2S_ROLE_MASTER); ESP_ERROR_CHECK(i2
for (size_t i = 0; i < bytes_read / sizeof(int32_t); i += 2) { //左右声道数据取高16位 int16_t left_sample = (i2s_buffer>> 16) & 0xFFFF; int16_t right_sample = (i2s_buffer[i + 1] >> 16) & 0xFFFF; //获取音频幅度最大振幅 ...
i2s_config_t i2s_config = { .mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_RX | I2S_MODE_ADC_BUILT_IN), .sample_rate = 40000, .bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT, .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT, .communication_format = I2S_COMM_FORMAT_I2S_LSB, .intr...
I2S包括两个声道(Left/Right)的数据,在主设备发出声道选择/字选择(WS)控制下进行左右声道数据切换。通过增加I2S接口的数目或其它I2S设备可以实现多声道(Multi-Channels)应用。 在I2S传输协议中,数据信号、时钟信号以及控制信号是分开传输的。I2S协议只定义三根信号线:时钟信号SCK、数据信号SD和左右声道选择信号WS。 时钟...
i2s_driver_install(I2S_NUM_0, &i2s_config, 0, NULL); } // 采集音频数据 void capture_audio_data() { char *audio_buffer = malloc(1024); size_t bytes_read; i2s_read(I2S_NUM_0, audio_buffer, 1024, &bytes_read, portMAX_DELAY); ...
i2s_driver_install(I2S_NUM_0, &i2s_config, 0, NULL); i2s_set_adc_mode(ADC_UNIT_1, ADC1_CHANNEL_6); // 绑定 ADC 通道 c. 启动采集 i2s_adc_enable(I2S_NUM_0); // 启动 ADC DMA d. 读取数据 uint8_t buffer[1024]; size_t bytes_read; ...
Codec 在左右channel上报固定数据 0x11,0x22, 0x33,0x44 和 0xaa 0xbb 0xcc 0xdd。app调用i2s_read读取数据,但是只有部分数据是正确的,绝大多少都是错误数据。 err = i2s_read(CONFIG_I2S_PORT, pbuf, in_len, &out_len, portMAX_DELAY); 测试了几种参数,无论是读取32/320/640字节,都是同样情况,只...
i2s_config_t i2s_read_config = { .mode = I2S_MODE_MASTER | I2S_MODE_TX | I2S_MODE_RX, .sample_rate = 44100, .bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT, .communication_format = I2S_COMM_FORMAT_STAND_I2S, .channel_format = I2S_CHANNEL_FMT_RIGHT_LEFT, .intr_alloc_flags = ESP...
Re: ESP32 I2S Read Timeout Problem Postbydjixon»Sat Apr 20, 2024 10:58 pm Why don't you make two separated i.e std_cfg_rx and std_cfg_tx variables with proper values in each of them, then in last two functions i2s_channel_init_std_mode() pass one variable for tx_chan and ...
static void IRAM_ATTR i2s_in_isr(void *arg) { if (I2S0.int_st.out_done) { // 检查是否为输入完成中断 // 1. 读取填满的 DMA 缓冲区 size_t bytes_read; i2s_read(I2S_NUM_0, buffer, BUFFER_SIZE, &bytes_read, 0); // 2. 处理数据(例如写入 SD 卡、网络发送等) ...