#include <twl/camera.h>CAMERAResult CAMERA_I2CFrameRate(CAMERASelect camera, CAMERAFrameRate rate); CAMERAResult CAMERA_I2CFrameRateAsync(CAMERASelect camera, CAMERAFrameRate rate, CAMERACallback callback, void *arg);
| camera | Camera to configure (CAMERA_SELECT_IN, CAMERA_SELECT_OUT, or CAMERA_SELECT_BOTH). |
| rate | Frame rate. |
| callback | Function that is called when asynchronous processing has completed. |
| arg | Arguments when the callback function is invoked. |
Returns CAMERA_RESULT_SUCCESS if configuration was successful.
Changes the camera's frame rate.
Unlike CAMERA_I2CFrameRate, the CAMERA_I2CFrameRateAsync function returns control immediately and runs asynchronously. Use callback to confirm that processing has completed.
Do not set CAMERA_FRAME_RATE_30_TO_10, CAMERA_FRAME_RATE_30_TO_5, or CAMERA_FRAME_RATE_30 with this function while either CAMERA_SIZE_VGA or CAMERA_SIZE_DS_LCDx4 is specified with the CAMERA_I2CSize* functions. Capture data becomes impossible to receive if these settings are used at the same time.
Also,
Note:
If camera settings are changed using any of the CAMERA_I2C* functions, the changes may be delayed for approximately one frame before they are applied. If camera settings are changed during image capture, therefore, an application's timing may make it impossible to get an image with the changes applied.
Occasional Shifting of Captured Images
The captured image may shift if this function is called during image capture.
Before calling this function, first stop the image capture with CAMERA_StopCapture. Then call this function. After this function completes execution, restart the image capture with CAMERA_StartCapture.
CAMERASelect
CAMERACallback
CAMERAResult
CAMERAFrameRate
CAMERA_I2CSize*
2009/11/11 Explained occasional shifting of captured images.
2009/07/03 Updated information about conditions of use.
2008/10/30 Added that CAMERA_SELECT_BOTH can also be specified.
2008/01/23 Added a description that 30 fps capture is impossible at VGA resolution.
2007/11/12 Initial version.
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