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lib_xua/examples/AN00248_xua_example_pdm_mics/README.rst

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+:orphan:
+
+#########################################
+AN00248: Using lib_xua with lib_mic_array
+#########################################
+
+:vendor: XMOS
+:version: 1.0.0
+:scope: Example
+:description: Using lib_xua with lib_mic_array
+:category: General Purpose
+:keywords: USB Audio, PDM microphones
+:hardware: XK-EVK-XU316
+
+*******
+Summary
+*******
+
+This application note describes how to use ``lib_mic_array`` in conjunction with ``lib_xua``
+to implement a USB Audio device with the ability to record from multiple PDM microphones.
+
+
+**************
+Required tools
+**************
+
+  * XMOS XTC Tools: 15.3.0
+
+*****************
+Required hardware
+*****************
+
+The example code provided with the application has been implemented
+and tested on the XK-EVK-XU316 board.
+
+*********************************
+Required libraries (dependencies)
+*********************************
+
+  * `lib_xua <https://www.xmos.com/file/lib_xua>`_
+  * `lib_adat <https://www.xmos.com/file/lib_adat>`_
+  * `lib_locks <https://www.xmos.com/file/lib_locks>`_
+  * `lib_logging <https://www.xmos.com/file/lib_logging>`_
+  * `lib_mic_array <https://www.xmos.com/file/lib_mic_array>`_
+  * `lib_xassert <https://www.xmos.com/file/lib_xassert>`_
+  * `lib_xcore_math <https://www.xmos.com/file/lib_xcore_math>`_
+  * `lib_spdif <https://www.xmos.com/file/lib_spdif>`_
+  * `lib_sw_pll <https://www.xmos.com/file/lib_sw_pll>`_
+  * `lib_xud <https://www.xmos.com/file/lib_xud>`_
+  * `lib_board_support <https://www.xmos.com/file/lib_board_support>`_
+
+*************************
+Related application notes
+*************************
+
+ * None
+
+*******
+Support
+*******
+
+This package is supported by XMOS Ltd. Issues can be raised against the software at: http://www.xmos.com/support
+
+
+

lib_xua/examples/AN00248_xua_example_pdm_mics/src/xua_conf.h

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+// Copyright 2017-2024 XMOS LIMITED.
+// This Software is subject to the terms of the XMOS Public Licence: Version 1.
+
+#ifndef _XUA_CONF_H_
+#define _XUA_CONF_H_
+
+#include <platform.h>
+
+#define NUM_USB_CHAN_OUT                    0                /* Number of channels from host to device */
+#define NUM_USB_CHAN_IN                     2                /* Number of channels from device to host */
+#define I2S_CHANS_DAC                       2                /* Number of I2S channels out of xCORE */
+#define I2S_CHANS_ADC                       0                /* Number of I2S channels in to xCORE */
+#define MCLK_441                            (512 * 44100)    /* 44.1kHz family master clock frequency */
+#define MCLK_48                             (512 * 48000)    /* 48kHz family master clock frequency */
+#define XUA_PDM_MIC_FREQ                    48000            /* Currently sample rate changes are not supported for PDM mics */
+#define MIN_FREQ                            XUA_PDM_MIC_FREQ /* Minimum sample rate */
+#define MAX_FREQ                            XUA_PDM_MIC_FREQ /* Maximum sample rate */
+
+#define XUA_NUM_PDM_MICS                    2
+#define MIC_ARRAY_CONFIG_PORT_MCLK          PORT_MCLK_IN
+#define MIC_ARRAY_CONFIG_PORT_PDM_CLK       PORT_PDM_CLK
+#define MIC_ARRAY_CONFIG_PORT_PDM_DATA      PORT_PDM_DATA
+#define MIC_ARRAY_CONFIG_CLOCK_BLOCK_A      XS1_CLKBLK_1      
+#define MIC_ARRAY_CONFIG_CLOCK_BLOCK_B      XS1_CLKBLK_2    /* Second clock needed as we use DDR */
+
+#define EXCLUDE_USB_AUDIO_MAIN
+
+#define AUDIO_CLASS                         1
+#define VENDOR_STR                          "XMOS"
+#define VENDOR_ID                           0x20B1
+#define PRODUCT_STR_A2                      "XUA PDM Example"
+#define PRODUCT_STR_A1                      "XUA PDM Example"
+#define PID_AUDIO_1                         1
+#define PID_AUDIO_2                         2
+#define XUA_DFU_EN                          0               /* Disable DFU for simplicity of example */
+#endif

lib_xua/examples/AN00248_xua_example_pdm_mics/src/xud_conf.h

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+// Copyright 2017-2024 XMOS LIMITED.
+// This Software is subject to the terms of the XMOS Public Licence: Version 1.
+
+#include "xua_conf.h"
+
+/* TODO */
+#define XUD_UAC_NUM_USB_CHAN_OUT    NUM_USB_CHAN_OUT
+#define XUD_UAC_NUM_USB_CHAN_IN     NUM_USB_CHAN_IN