Grabber::execI2COperation Method |
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Performs a read/write operation on the I²C bus of the currently used video capture device.
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| Syntax: |
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bool execI2COperation( int dev_addr, void* write_buffer, int write_len, void* read_buffer, int read_len );
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| dev_addr |
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The address of the I²C slave on the device to be communicated with. The address value depends on the used hardware, and is specified in its 7-bit form.
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| write_buffer |
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The data to write. The buffer size has to be at least write_len bytes.
This pointer can be NULL, if write_len is 0.
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| write_len |
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The amount of bytes the that should be sent to the I²C slave. This value may be 0.
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| read_buffer |
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A buffer to receive the data read from the I²C slave. The buffer has to have a size of at least read_len bytes.
This pointer can be NULL, if read_len is 0.
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| read_len |
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The number of byte to be read from the I²C slave. This value may be 0.
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| Return value: |
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| true |
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The operation was successful.
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| false |
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The operation failed.
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| Remarks: |
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This function gives access to internal parts of the video capture device. Please do not use it unless you have additional
documentation about the specific I²C slave you are communicating with.
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| Information: | | Introduced in version 3.4
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| See also: |
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Grabber, Grabber::hasI2CInterface |