ASI120MC Set BANDWIDTHOVERLOAD Error

mikep

Hello,

I have a user of my application who receives and error (see bleow) whenever the app tries to set the ASI_BANDWIDTHOVERLOAD value through the ASICameraDll2.SetControlValue method SDK. The value he is trying to set is 40 and the camera is a ZWO120MC.

Any ideas?

Thanks,

Mike

Message: Error 'ASI_ERROR_GENERAL_ERROR' from call to

ASISetControlValue(cameraId=0, controlType=ASI_BANDWIDTHOVERLOAD, value=40, auto=False)

HResult: -2146233088

Source: AllSkEye.Common.Infrastructure

StackTrace: at AllSkEye.Common.Infrastructure.Interop.ASICameraDll2.CheckReturn(ASI_ERROR_CODE errorCode, MethodBase callingMethod, Object parameters)

at AllSkEye.Common.Infrastructure.Interop.ASICameraDll2.SetControlValue(Int32 cameraId, ASI_CONTROL_TYPE controlType, Int32 value, Boolean auto)

at AllSkEye.Common.Infrastructure.Interop.CameraControl.set_Value(Int32 value)

at ...MoveNext()

chad

Hi Mike,

1, Is it ok to set other values? Like 50.

2, Let him offer more settings, try to repeat the issue.

3, Using the same USB Port and cable, then try other software with same settings.

Thanks

Chad

mikep

Thanks Chad.

I now also have another user with the same problem. The answers to the above suggestions are:

1) The problem occurs regardless of what the value is set to, it happens all the time

2) Other changes didn't solve the problem either

3) The camera works fine in ASICAP

Any help would be appreciated!

mikep

Also I would like to add that the application is able to set the other properties like gain and exposure fine, it's just the ASI_BANDWIDTHOVERLOAD that is throwing an error. Could this be related to the camera being old? Does it need a firmware upgrade?

Thanks,

Mike

chad

Hi Mike，

I checked, it should be the same with other controls.

In general, it has nothing to do with FW. So there is no need to upgrade the FW.

Can you give me your program? I will test it.

Thanks

Chad

mikep

Thanks Chad.

The app can be downloaded from here;

https://mpoelzl.exavault.com/share/view/igsg-5xo0l8b6

Just unzip and run the AllSkEye.exe file. First time you will have to go into the 'Change Settings' tab and click 'Edit Application Settings'. Then use the 'Create Default Folders...' button to create the output folders somewhere on your computer (this is where all the images will be created to). Then click 'Save Changes' to save the new settings.

Once this is done go back to the 'Run System' tab and select the 'Other' radio button under 'Select Camera'. This should find and display the ASI camera in the drop down box. Once it is selected in the dropdown box you can then click 'Run' or 'One Acquisition' to take an image. If you want to see it you can go to the 'Image Preview' tab and tick the 'Create Preview Image(s)' checkbox.

To change the ZWO related camera settings you have to go back into editing the settings and scroll down to the 'Zwo Camera' section of the settings where you can change the USB limit setting etc.

Thanks!

Mike

chad

Hi Mike,

I checked.

I think you should set the bandwidth before the exposure.

If you want to set exposure time first, please make sure the value is smaller than 500ms.

In the initialization phase, if the exposure time is too long, it may cause the camera initial failed.

Thanks

Chad

mikep

Hi Chad,

Thanks, I will try this and let you know if it fixes the problem.

Kind Regards,

Mike

mikep

Hi Chad,

Unfortunately that change didn't solve the problem, the same error still persists. When you tested the app did it work on your camera? It's strange because it seems to work fine with other ASI cameras.

Not sure if it helps but the code for taking an image is:

/// <summary>
/// Gets the image from a Zwo camera
/// </summary>
/// <param name="exposureTimeSeconds">The exposure time in milliseconds.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>The image returned data array.</returns>
private async Task<int> GetImageFromZwoCamera(double exposureTimeSeconds, CancellationToken cancellationToken)
{
    var task = Task.Run(
        async () =>
        {
            // Set camera parameters
            CaptureAreaInfo area = this.asiCamera.CaptureAreaInfo;
            int imageWidth = area.Size.Width / this.settingsEntity.BinningFactor;
            int imageHeight = area.Size.Height / this.settingsEntity.BinningFactor;
            ASICameraDll2.ASI_IMG_TYPE imageTypeToUse = this.settingsEntity.ZwoCameraUseRaw8InstedOfRaw16 ? ASICameraDll2.ASI_IMG_TYPE.ASI_IMG_RAW8 : ASICameraDll2.ASI_IMG_TYPE.ASI_IMG_RAW16;
            this.asiCamera.CaptureAreaInfo = new CaptureAreaInfo(new Size(imageWidth, imageHeight), this.settingsEntity.BinningFactor, imageTypeToUse);

            // USB Limit
            var bandwidthControl = this.asiCamera.GetControl(ASICameraDll2.ASI_CONTROL_TYPE.ASI_BANDWIDTHOVERLOAD);
            bandwidthControl.Value = this.settingsEntity.ZwoCameraUsbLimit;

            // Set Gain
            var gainControl = this.asiCamera.GetControl(ASICameraDll2.ASI_CONTROL_TYPE.ASI_GAIN);
            gainControl.Value = this.settingsEntity.ZwoCameraGain;

            // Set Offset
            var offsetControl = this.asiCamera.GetControl(ASICameraDll2.ASI_CONTROL_TYPE.ASI_BRIGHTNESS);
            offsetControl.Value = this.settingsEntity.ZwoCameraOffset;

            // Exposure Time
            var exposureTimeControl = this.asiCamera.GetControl(ASICameraDll2.ASI_CONTROL_TYPE.ASI_EXPOSURE);
            exposureTimeControl.Value = (int)(exposureTimeSeconds * 1000000);

            // White Balance
            var redBalanceControl = this.asiCamera.GetControl(ASICameraDll2.ASI_CONTROL_TYPE.ASI_WB_R);
            redBalanceControl.Value = this.settingsEntity.ZwoCameraRedBalance;

            var blueBalanceControl = this.asiCamera.GetControl(ASICameraDll2.ASI_CONTROL_TYPE.ASI_WB_B);
            blueBalanceControl.Value = this.settingsEntity.ZwoCameraBlueBalance;                

            // Start exposure
            this.asiCamera.StartExposure(false);

            while (this.asiCamera.ExposureStatus == ASICameraDll2.ExposureStatus.ExpWorking)
            {
                await Task.Delay(new TimeSpan(0, 0, 0, 0, 200), cancellationToken);
            }

            if (this.asiCamera.ExposureStatus == ASICameraDll2.ExposureStatus.ExpSuccess)
            {
                byte buffer;

                if (this.asiCamera.CaptureAreaInfo.ImageType == ASICameraDll2.ASI_IMG_TYPE.ASI_IMG_RAW8)
                {
                    buffer = this.CopyCameraDataToBuffer(this.asiCamera.CaptureAreaInfo.Size.Height * this.asiCamera.CaptureAreaInfo.Size.Width);
                    return buffer.Select(x => (int)x).ToArray();
                }

                if (this.asiCamera.CaptureAreaInfo.ImageType == ASICameraDll2.ASI_IMG_TYPE.ASI_IMG_RAW16)
                {
                    buffer = this.CopyCameraDataToBuffer(this.asiCamera.CaptureAreaInfo.Size.Height * this.asiCamera.CaptureAreaInfo.Size.Width * 2);
                    int returnArray = new int;

                    for (int index = 0; index < buffer.Length - 1; index = index + 2)
                    {
                        byte lowerByte = buffer;
                        byte higherByte = buffer;

                        returnArray = 256 * (int)higherByte + (int)lowerByte;
                    }

                    return returnArray;
                }

                throw new ApplicationException("Application only supports RAW8 and RAW16 formats for ZWO Cameras.");
            }

            throw new ApplicationException("Exposure Failed.");
        });

    await task;

    return task.Result;
}

Any Ideas?

chad

Hi Mike,

On the 0.9.9.0 version, it could be opened for 120MC, no error.

Both 290 and 120 could be opened. They all show success.

But I do know how to get the image.

You know, 120 is our first generation products, It maybe a compatibility issue. You can use SharpCap to get rid of this problem.

Thanks

Chad