Difficulties to make a snapshot with ASICamera2 APK

wuu

Hello,

I try to use the function ASIStartExposure to make a snaphot,

ASI_SUCCESS is returned after the call but the exposure status stays ASI_EXP_IDLE.

Resulting a ASI_ERROR_TIMEOUT, when I call ASIGetDataAfterExp.

All the camera parameters are set to the default value and all automatic controls are disabled.

Is there a code example with the camera2 apk to do that? To try/compare with my code.


void test(int camres_x, int camres_y){
	ASI_CAMERA_INFO asiCam;
	ASI_CONTROL_CAPS acc;
	ASI_ERROR_CODE aec;
	ASI_EXPOSURE_STATUS exp_status=ASI_EXP_SUCCESS;
	int nb_control, i;
	unsigned char* image;

	//open the camera
	ASIGetCameraProperty(&asiCam,  ASIGetNumOfConnectedCameras()-1);
	ASIOpenCamera(asiCam.CameraID);
   ASIInitCamera(asiCam.CameraID);

	//set all the parameters to default/non automatic
	ASIGetNumOfControls(asiCam.CameraID, &nb_control);
	for(i=0; i<nb_control; i++){
		ASIGetControlCaps(asiCam.CameraID, i, &acc);
		if(acc.IsWritable)
			aec=ASISetControlValue(asiCam.CameraID, acc.ControlType, acc.DefaultValue, ASI_FALSE);
	}
		
	//create a ROI of the image size at the top left corner
	ASISetROIFormat(asiCam.CameraID, camres_x, camres_y, 0, ASI_IMG_RAW8);
	ASISetStartPos(asiCam.CameraID, 0, 0);
	
	//create memory for the image
	image=(unsigned char*)malloc(camres_x*camres_y);

	/*problematic part*/
	aec=ASIStartExposure(asiCam.CameraID, ASI_FALSE);// here the funcion success
	ASIGetExpStatus(asiCam.CameraID, &exp_status); // here the status is set to IDLE
	while(exp_status==ASI_EXP_WORKING) //the loop is not reached
		ASIGetExpStatus(asiCam.CameraID, &exp_status);
	
	aec=ASIGetDataAfterExp(asiCam.CameraID, image, camres_x*camres_y);//the funcion return a time out
}

Edit: I have the same kind of error when I try the video mode, all the functions success expect the timeout when I want to get the image data.

monstermax

Which version of the SDK do you use? Try it with version 0.3xx, version 0.4 gives makes me problems, too. Replace the line directly above the while loop by exp_status = ASI_EXP_WORKING, so that the loop is definitely entered (but your version normally should work too).

wuu

I have tried the 1.11.0.35 and the 1.12.0.2, neither works. The versionning is not the same on windows :| .

There is the same problem on linux.

wuu

Execute the program as root on linux allow to have coherent values on the exposure status.

But it did not works on windows.

yang

That means when ASIGetExpStatus is called the exposure have completed and no image is grabbed, maybe in this case I should change status EXP_IDLE to EXP_FAILED. You can call ASIGetDataAfterExp only when status is EXP_SUCCESS

_________________

ZWO:www.zwoptical.com

SuZhou China

wuu

Yes it can be better! or create a new error code.

Finally I find the error: When I set the ROI, I put the binning to 0 instead of 1

The function return an error if the binning is too high but not if 0 or negative.

Especially for 0, the program seems to works until a floating point exception occurs.

Thanks for the answers :)