/* 清除 DMA 缓冲区以避免缓冲区中的旧数据产生噪声 */ i2s_zero_dma_buffer(I2S_NUM); if (bytes_write > 0) { ESP_LOGI(TAG, "[music] i2s music played, %d bytes are written.", bytes_write); } else { ESP_LOGE(TAG, "[music] i2s music play falied."); abort(); } vTaskDelay(100...
i2s_zero_dma_buffer(I2S_NUM_0); i2s_start(I2S_NUM_0); } void loop() { size_t bytes_read = 0; i2s_read(I2S_NUM_0, i2s_buffer, I2S_BUF_SIZE * 2 * sizeof(int32_t), &bytes_read, portMAX_DELAY); //左声道和右声道最大振幅复位 max_left_amplitude = INT16_MIN; max_right_...
esp_err_ti2s_start(i2s_port_ti2s_num) 下面这个函数是清空I2S的DMA缓存: esp_err_ti2s_zero_dma_buffer(i2s_port_ti2s_num)
the dma_tx_buffer outputing data to the DAC. One task is printing out i2s events as they happen. The other task continously writes 2048 bytes to the dma tx buffer.Each dma buffer is 256 bytes. I have 2 buffers.I get I2S_EVENT_TX_DONE event 8 times for every i2s_write().so...
i2s_zero_dma_buffer((i2s_port_t)portNo); } #elif defined(ESP8266) (void)dma_buf_count; (void)use_apll; if (!i2sOn) { orig_bck = READ_PERI_REG(PERIPHS_IO_MUX_MTDO_U); orig_ws = READ_PERI_REG(PERIPHS_IO_MUX_GPIO2_U); #ifdef I2S_HAS_BEGIN_RXTX_DRIVE_CLOCKS ...
i2s_driver_install"); } ret = i2s_set_pin((i2s_port_t)1, &pin_config); if (ret != ESP_OK) { ESP_LOGE(TAG, "Error in i2s_set_pin"); } ret = i2s_zero_dma_buffer((i2s_port_t)1); if (ret != ESP_OK) { ESP_LOGE(TAG, "Error in initializing dma buffer with 0"); }...
{ Start_Sending_Millis = Millis_Now; i2s_adc_disable(I2S_NUM_0); for (int i=0;i<NUM_SAMPLES;i++) { data = String((i2s_read_buff[i])/(float)40.95); data += "}"; webSocket.broadcastTXT(data.c_str(), data.length()); } i2s_zero_dma_buffer(I2S_NUM_0); i2s_adc_enable(...
i2s_zero_dma_buffer(I2S_NUM_0); for(;;) { // wait for some data to be requested i2s_event_t evt; if (xQueueReceive(i2sQueueHandle, &evt, portMAX_DELAY) == pdPASS) { if (evt.type == I2S_EVENT_TX_DONE) { i2s_write( I2S_NUM_0, (uint8_t *)buffer, (samples*bytes),...
data,1024);vTaskDelay(5);}vTaskDelay(pdMS_TO_TICKS(200));//延时200msi2s_zero_dma_buffer(...
disp_drv.buffer = &disp_buf; lv_disp_drv_register(&disp_drv);/*触摸屏输入接口配置*/lv_indev_drv_tindev_drv; lv_indev_drv_init(&indev_drv); indev_drv.read_cb = touch_driver_read; indev_drv.type = LV_INDEV_TYPE_POINTER;