camera - Camera#

Adapted Air780EP/Air780EPV Air105

Note

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Tip

This library has its own demo,click this link to view the demo example of camera

Constant#

constant	type	explanation
camera.AUTO	number	Camera works in automatic mode
camera.SCAN	number	The camera works in scan mode and only outputs Y component

camera.init(InitReg_or_cspi_id, cspi_speed, mode, is_msb, rx_bit, seq_type, is_ddr, only_y, scan_mode, w, h)#

Initialize camera

Parameters

Incoming Value Type	Explanation
table/integer	If it is a table, see demo/camera/AIR105 for DVP camera configuration, and ignore subsequent parameters. If it is a number, it is the serial number of the camera spi bus.
int	camera spi Bus speed
int	camera spi Mode,0~3
int	Is the bit order of bytes msb,0 no 1 yes
int	Number of bits received simultaneously,1,2,4
int	byte Sequence,0~1
int	Double edge sampling configuration, 0 is not enabled, other values are determined according to actual SOC
int	Only receive Y component, 0 is not enabled, 1 is enabled, scan code must be enabled, otherwise it will fail.
int	Working mode, camera.AUTO, camera.SCAN scan code
int	Camera width
int	Camera height

Return Value

return value type	explanation
int/false	Return camera_id on success, return on failure false

Examples

camera_id = camera.init(GC032A_InitReg)--screen output rgb image
--After initialization, start is required to start output/scan code
camera.start(camera_id)--Start the specified camera

camera.on(id, event, func)#

Parameters

Incoming Value Type	Explanation
int	camera id, camera 0 Write 0, camera 1 write 1
string	Event Name
function	Callback Method

Return Value

return value type	explanation
nil	No return value

Examples

camera.on(0, "scanned", function(id, str)
--id int camera id
--str Various types of false cameras do not work normally, the true photo mode is successfully photographed and saved, the size of the data returned this time in int original data mode, and the decoded value after the code is successfully scanned in string scan mode.
    print(id, str)
end)

camera.start(id)#

Start the specified camera

Parameters

Incoming Value Type	Explanation
int	camera id,For example 0

Return Value

return value type	explanation
boolean	Returns true on success, otherwise false

Examples

camera.start(0)

camera.stop(id)#

Stop the specified camera

Parameters

Incoming Value Type	Explanation
int	camera id,For example 0

Return Value

return value type	explanation
boolean	Returns true on success, otherwise false

Examples

camera.stop(0)

camera.close(id)#

Close the specified camera and release the corresponding I/O resources.

Parameters

Incoming Value Type	Explanation
int	camera id,For example 0

Return Value

return value type	explanation
boolean	Returns true on success, otherwise false

Examples

camera.close(0)

camera.capture(id, save_path, quality)#

camera Take pictures

Parameters

Incoming Value Type	Explanation
int	camera id,For example 0
string/zbuff/nil	save_path,The path to save the file. If it is empty, it is written in the last path. The default is/capture.jpg. If it is zbuff, the picture is saved in buff and not written to the file system.
int	quality, jpeg Compression quality, 1 worst, small footprint, 3 highest, largest footprint and time-consuming, default 1

Return Value

return value type	explanation
boolean	Returns true on success, otherwise returns false, and the received length is called back through the callback function set by camera.on after the actual completion.

Examples

camera.capture(0)

camera.video(id, w, h, out_path)#

camera Output video stream USB

Parameters

Incoming Value Type	Explanation
int	camera id,For example 0
int	Width
int	Height
int	Output path, currently only virtual serial port can be used 0

Return Value

return value type	explanation
boolean	Returns true on success, otherwise false

Examples

camera.video(0, 320, 240, uart.VUART_0)

camera.startRaw(id, w, h, buff)#

Start camera to output the original data to the user’s zbuff buffer, stop after outputting 1fps, and call back the received length through the callback function set by camera.on. if you need to output again, please call camera.getRaw

Parameters

Incoming Value Type	Explanation
int	camera id,For example 0
int	Width
int	Height
zbuff	The buffer area used to store data. The size must be no less w X h X 2 byte

Return Value

return value type	explanation
boolean	Returns true on success, otherwise false

Examples

camera.startRaw(0, 320, 240, buff)

camera.getRaw(id)#

Start camera again to output the original data to the user’s zbuff buffer, stop after outputting 1fps, and call back the received length through the callback function set by camera.on. if you need to output again, please continue to call this API

Parameters

Incoming Value Type	Explanation
int	camera id,For example 0

Return Value

return value type	explanation
boolean	Returns true on success, otherwise false

Examples

camera.getRaw(0)

camera.preview(id, onoff)#

Start and stop camera preview function, directly output to LCD, only the SOC supported by hardware can run

Parameters

Incoming Value Type	Explanation
int	camera id,For example 0
boolean	true On, false to stop

Return Value

return value type	explanation
boolean	Returns true on success, otherwise false

Examples

camera.preview(1, true)