85 lines
2.4 KiB
ReStructuredText
85 lines
2.4 KiB
ReStructuredText
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UVC
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=================================
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:link_to_translation:`en:[English]`
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1. 简介
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---------------------------------
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本工程是UVC默认调试工程，可以用来测试插入的UVC工作是否正常，默认使用16M PSRAM。
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1.1 规格
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,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
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请参考 `规格 <../../media/doorbell/index.html#id2>`_
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1.2 路径
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,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
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<bk_avdk源代码路径>/projects/peripheral/uvc
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2. 框架图
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---------------------------------
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请参考 `框架图 <../../media/doorviewer/index.html#id4>`_
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3. 配置
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---------------------------------
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3.1 蓝牙与多媒体内存复用
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使用此工程，只是单纯验证uvc，故内存不需要与蓝牙共用。
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+-------------------------------------+---------------+-------------------------------------+
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| marco | value | implication |
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+-------------------------------------+---------------+-------------------------------------+
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| CONFIG_BT_REUSE_MEDIA_MEMORY | N | 多媒体和蓝牙共用一块sram（分时复用）|
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+-------------------------------------+---------------+-------------------------------------+
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3.1.1 卸载蓝牙
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.................................
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::
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#ifdef CONFIG_BT_REUSE_MEDIA_MEMORY
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#if CONFIG_BLUETOOTH
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bk_bluetooth_deinit();
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#endif
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#endif
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3.1.2 初始化蓝牙
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.................................
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::
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bk_bluetooth_init();
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3.2 区别
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,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
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uvc与doorbell的区别在于：
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* uvc默认上电启动外设uvc，并通过软件解码器，分析输出的JPEG图像原始数据格式YUV422/YUV420，和输出分辨率。其他外设不参与，不支持图传，LCD显示，语音传输等。
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* doorbell是一个完整的门锁方案。
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4. 演示说明
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---------------------------------
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默认上电自启动，不需要额外操作，会打印如下log。
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::
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(4736):##MJPEG: frame_id:113, length:56922, frame_addr:0x6020fba0
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video_co:I(4736):4:2:2, YUV:
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(4736):##DECODE:pixel_x:864, pixel_y:480
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(4736):rotate_angle:0(0:0 1:90 2:180 3:270)
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(4736):byte_order:0(0:little endian 1:big endian)
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(4736):out_fmt:YUYV
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5. 代码讲解
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---------------------------------
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请参考 `代码讲解 <../../media/doorbell/index.html#id13>`_
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