163 lines
2.8 KiB
ReStructuredText
163 lines
2.8 KiB
ReStructuredText
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DAC
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=============
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Macros
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------------
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dac sampling frequence
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^^^^^^^^^^^^^^^^^^^^^^^^^
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dac 采样频率可以选择 32K、16K、8K，512K 只有 dma 模式下才可以使用。
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.. code-block:: c
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:linenos:
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#define DAC_SAMPLING_FREQ_32K 0
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#define DAC_SAMPLING_FREQ_16K 1
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#define DAC_SAMPLING_FREQ_8K 3
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#define DAC_SAMPLING_FREQ_512K 4
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dac channel
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^^^^^^^^^^^^^^^^^^^^^^^^^
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博流系列芯片 dac 通道共两组：A 通道和 B 通道。
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.. code-block:: c
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:linenos:
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#define DAC_CHANNEL_A (1 << 0)
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#define DAC_CHANNEL_B (1 << 1)
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Structs
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------------
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无
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Functions
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------------
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bflb_dac_init
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^^^^^^^^^^^^^^^^^^^^
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说明: 初始化 dac。dac 使用之前需要开启 dac ip 时钟、设置 dac 时钟源和分频值、选择使用的 gpio 为 analog 模式。
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.. code-block:: c
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:linenos:
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void bflb_dac_init(struct bflb_device_s *dev, uint8_t frequence);
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.. list-table::
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:widths: 10 10
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:header-rows: 1
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* - parameter
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- description
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* - dev
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- 设备句柄
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* - frequence
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- 采样率
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bflb_dac_deinit
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^^^^^^^^^^^^^^^^^^^^
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说明: 反初始化 dac。
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.. code-block:: c
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:linenos:
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void bflb_dac_deinit(struct bflb_device_s *dev);
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.. list-table::
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:widths: 10 10
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:header-rows: 1
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* - parameter
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- description
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* - dev
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- 设备句柄
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bflb_dac_link_txdma
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^^^^^^^^^^^^^^^^^^^^^^^^^^^
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说明: dac dma 开关使能。
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.. code-block:: c
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:linenos:
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void bflb_dac_link_txdma(struct bflb_device_s *dev, bool enable);
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.. list-table::
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:widths: 10 10
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:header-rows: 1
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* - parameter
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- description
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* - dev
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- 设备句柄
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* - enable
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- 是否使能 dma
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bflb_dac_channel_enable
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^^^^^^^^^^^^^^^^^^^^^^^^^^^
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说明: dac 通道使能。
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.. code-block:: c
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:linenos:
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void bflb_dac_channel_enable(struct bflb_device_s *dev, uint8_t ch);
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.. list-table::
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:widths: 10 10
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:header-rows: 1
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* - parameter
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- description
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* - dev
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- 设备句柄
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* - ch
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- 通道，多个通道之间使用 | 连接
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bflb_dac_channel_disable
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^^^^^^^^^^^^^^^^^^^^^^^^^^^
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说明: dac 通道关闭。
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.. code-block:: c
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:linenos:
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void bflb_dac_channel_disable(struct bflb_device_s *dev, uint8_t ch);
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.. list-table::
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:widths: 10 10
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:header-rows: 1
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* - parameter
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- description
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* - dev
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- 设备句柄
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* - ch
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- 通道，多个通道之间使用 | 连接
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bflb_dac_set_value
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^^^^^^^^^^^^^^^^^^^^^^^^^^^
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说明: 更改 dac 通道值。
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.. code-block:: c
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:linenos:
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void bflb_dac_set_value(struct bflb_device_s *dev, uint8_t ch, uint16_t value);
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.. list-table::
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:widths: 10 10
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:header-rows: 1
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* - parameter
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- description
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* - dev
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- 设备句柄
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* - ch
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- 通道，多个通道之间使用 | 连接
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* - value
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- 通道值
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