VC0706 Class Reference

Asynchronous UART JPEG camera with timer-driven command handling. Call begin() before commands and keep the driver/UART alive during callbacks. Commands share a state machine; do not overlap capture and command sequences. More...

#include <VC0706.hpp>

Public Member Functions
	VC0706 (SerialPort &, uint8_t compRatio=0xFF)
	Bind the UART and initial compression byte (default 0xFF).
void	begin ()
	Start the UART at 38400 baud and install the asynchronous receive handler.
void	getVer ()
	Request the version; the response is printed by the receive handler.
void	takePicture (void(*func)(void *, const char *buf, uint32_t size), void *arg)
	Begin an asynchronous JPEG capture when idle.
void	stopFrame ()
	Freeze the frame and start the internal length/image retrieval sequence.
void	getLen ()
	Request frozen-frame length as part of the capture state machine.
void	getImage ()
	Allocate a JPEG buffer and request image bytes after length retrieval.
void	reset ()
	Discard pending UART bytes and send an asynchronous reset command.
void	startCapture (uint16_t cycle, void(*func)(void *, bool)=nullptr, void *arg=nullptr)
	Enter motion-status capture mode with optional periodic polling.
void	endCapture ()
	Stop periodic capture polling and reset the parser to idle.
void	setMotionCtrl (uint8_t len, uint8_t motionAttribute, uint8_t ctrlItme, uint8_t secondBit, uint8_t thirdBit=0)
	Send raw motion-control settings.
void	sendData (char *args, uint8_t Len)
	Write Len raw command bytes from args to the UART.
void	recoverFrame (void(*func)(void *, bool)=nullptr, void *arg=nullptr)
	Resume frame acquisition asynchronously.
void	checkMotionStatus ()
	Send a motion-status query, normally used while startCapture() is active.
void	restart ()
	Reset the local parser to idle and resend the current compression ratio.

Public Attributes
uint8_t	ratio
	Desired compression byte applied by the next capture or restart().

Detailed Description

Asynchronous UART JPEG camera with timer-driven command handling. Call begin() before commands and keep the driver/UART alive during callbacks. Commands share a state machine; do not overlap capture and command sequences.

Member Function Documentation

recoverFrame()

void VC0706::recoverFrame	(	void(*	func )(void *, bool) = nullptr,
		void *	arg = nullptr )

Resume frame acquisition asynchronously.

Parameters

func	Optional callback receiving arg and success; timeout reports false.
arg	User context passed to the callback.

setMotionCtrl()

void VC0706::setMotionCtrl	(	uint8_t	len,
		uint8_t	motionAttribute,
		uint8_t	ctrlItme,
		uint8_t	secondBit,
		uint8_t	thirdBit = 0 )

Send raw motion-control settings.

Parameters

len	Command argument length byte.
motionAttribute	Camera motion attribute selector.
ctrlItme	Camera control-item selector; 1 sends both payload bytes.
secondBit	First motion-control payload byte.
thirdBit	Second payload byte, used for control item 1.

startCapture()

void VC0706::startCapture	(	uint16_t	cycle,
		void(*	func )(void *, bool) = nullptr,
		void *	arg = nullptr )

Enter motion-status capture mode with optional periodic polling.

Parameters

cycle	Poll interval in milliseconds; zero disables automatic polling.
func	Optional callback receiving arg and true on a detected capture event.
arg	User callback context. The stored callback is consumed on notification.

takePicture()

void VC0706::takePicture	(	void(*	func )(void *, const char *buf, uint32_t size),
		void *	arg )

Begin an asynchronous JPEG capture when idle.

Parameters

func	Receives arg, JPEG bytes, and byte count; failure paths can report nullptr and zero. The image buffer is valid only during the callback.
arg	User context passed to func. A request while busy resets the camera instead of queuing another capture.

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The documentation for this class was generated from the following file:

• include/dev/VC0706.hpp