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Help with DIY CCD driver

  • Posts: 13
  • Thank you received: 2

Replied by Michael F. Toups on topic Help with DIY CCD driver

D2XX isn't working for me, again probably user error. I can't connect to the camera with D2XX and the current build with D2XX enabled.
sudo indiserver -v -m 100 indi_cam84_ccd
2016-11-26T22:28:22: startup: indiserver -v -m 100 indi_cam84_ccd 
2016-11-26T22:28:22: Driver indi_cam84_ccd: pid=3386 rfd=3 wfd=6 efd=7
2016-11-26T22:28:22: listening to port 7624 on fd 4
2016-11-26T22:28:22: Driver indi_cam84_ccd: snooping on Telescope Simulator.EQUATORIAL_EOD_COORD
2016-11-26T22:28:22: Driver indi_cam84_ccd: snooping on Telescope Simulator.TELESCOPE_INFO
2016-11-26T22:28:22: Driver indi_cam84_ccd: snooping on CCD Simulator.FILTER_SLOT
2016-11-26T22:28:22: Driver indi_cam84_ccd: snooping on CCD Simulator.FILTER_NAME
2016-11-26T22:28:31: Client 0: new arrival from 127.0.0.1:57556 - welcome!
2016-11-26T22:28:34: Driver indi_cam84_ccd: USING D2XX***********************************
2016-11-26T22:28:34: Driver indi_cam84_ccd: unable to open ftdi device: 1 (2)
2016-11-26T22:28:34: Driver indi_cam84_ccd: stderr EOF
2016-11-26T22:28:34: Driver indi_cam84_ccd: restart #1
2016-11-26T22:28:34: Driver indi_cam84_ccd: pid=3393 rfd=3 wfd=7 efd=8
2016-11-26T22:28:34: Driver indi_cam84_ccd: snooping on Telescope Simulator.EQUATORIAL_EOD_COORD
2016-11-26T22:28:34: Driver indi_cam84_ccd: snooping on Telescope Simulator.TELESCOPE_INFO
2016-11-26T22:28:34: Driver indi_cam84_ccd: snooping on CCD Simulator.FILTER_SLOT
2016-11-26T22:28:34: Driver indi_cam84_ccd: snooping on CCD Simulator.FILTER_NAME
2016-11-26T22:29:23: Driver indi_cam84_ccd: USING D2XX***********************************
2016-11-26T22:29:23: Driver indi_cam84_ccd: unable to open ftdi device: 1 (2)
2016-11-26T22:29:23: Driver indi_cam84_ccd: stderr EOF
2016-11-26T22:29:23: Driver indi_cam84_ccd: restart #2
2016-11-26T22:29:23: Driver indi_cam84_ccd: pid=3396 rfd=3 wfd=7 efd=8
2016-11-26T22:29:24: Driver indi_cam84_ccd: snooping on Telescope Simulator.EQUATORIAL_EOD_COORD
2016-11-26T22:29:24: Driver indi_cam84_ccd: snooping on Telescope Simulator.TELESCOPE_INFO
2016-11-26T22:29:24: Driver indi_cam84_ccd: snooping on CCD Simulator.FILTER_SLOT
2016-11-26T22:29:24: Driver indi_cam84_ccd: snooping on CCD Simulator.FILTER_NAME

But I can get the "read" example from the D2XX package.
 ./read
Library version = 0x10306
Opening port 0
FT_Open succeeded.  Handle is 0x823b680
FT_GetDeviceInfo succeeded.  Device is type 6.
FT_EE_Read succeeded.
 
Signature1 = 0
Signature2 = -1
Version = 3
VendorId = 0x0403
ProductId = 0x6010
Manufacturer = FTDI
ManufacturerId = CA
Description = cam8
SerialNumber = CAM8
MaxPower = 100
PnP = 1
SelfPowered = 0
RemoteWakeup = 0
Returning 0

Will shift back to the ftdi build and try to answer your other questions but any suggestions regarding D2XX, would like to have it for a comparison.
7 years 4 months ago #12684

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Replied by Michael F. Toups on topic Help with DIY CCD driver

Success, went back to the latest build with the ftdi lib and set the baudrate down to 50 baud, (and was playing with the timers also) and the read errors went away. Figuring out what settings do what will have to come later. I ended up with an image! So with the right settings the driver does work, just not sure what the right settings need to be.

Don't currently have any other indi items, cam8 is my first step down this path so not sure what I can use to test the usb serial adapter. I do have a Arduino that I am using to build a TEC controller and it uses the usb so that might be a good test. I'll have to dig it out later and test it while running the indi cam8 driver.

P.S. Tweaked a setting and now the image looks bad. Will need to investigate further but enough of this for one day.
Last edit: 7 years 4 months ago by Michael F. Toups. Reason: P.S.
7 years 4 months ago #12685

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Replied by gehelem on topic Help with DIY CCD driver

good news, thank you for the report
did it work "without sudo" ? what did you change ?
there are many other drivers you can try, eg dslr, filterwheel, focuser, mounts, other cameras ...
7 years 4 months ago #12695

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Replied by Michael F. Toups on topic Help with DIY CCD driver

(Still using sudo.)

However, I think I found the key issue that is causing the read errors. It is that the ftdi library's ftdi_read_data and the D2XX FT_Read have very different behaviors. See developer.intra2net.com/mailarchive/html...i/2012/msg00149.html for example. Looks like we might need to implement some variant of the function given in the patch. However, that version appears to be windows specific but could easily be linux compatible (it uses windows timer function.)

Need to investigate further but I think this is the key issue; it looks like there should be an easy fix. I'll investigate further.
7 years 4 months ago #12723

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Replied by gehelem on topic Help with DIY CCD driver

this is the conclusion i was afraid of, as understanding the way this library works is much beyond my skills...
thank you for your help Mikael !
Gilles.
7 years 4 months ago #12724

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Replied by Michael F. Toups on topic Help with DIY CCD driver

I am trying a few things. I think this is solvable with a modified version of ftdi_read_data. If so we should be able to make this work. Might be a while before I can work some more on this.

Michael
7 years 4 months ago #12725

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Replied by gehelem on topic Help with DIY CCD driver

ok fine,
Here comes the cleaning time, many other points need to be checked, like binning and subframe
7 years 4 months ago #12726

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Replied by Michael F. Toups on topic Help with DIY CCD driver

Below are two diffs showing a quick mod that appears to take care of the "timing" issue due to the differences between D2XX and ftdi.

First I changed the calls to ftdi_read_data to ftdi_read_data_modified and created a new function ftdi_read_data_modified that continually calls ftdi_read_data until either too many attempts are made or all the data has been collected. This is a quick and dirty solution that appears to care of the problem. The number of tries and the usleep time are somewhat arbitrary and probably could be tuned. Not the cleanest solution, but this should allow your code to work with the ftdi library.

Michael

First in libcam84.h changes are
18,23d17
< #ifdef D2XX
< #else
< struct ftdi_context;
< int ftdi_read_data_modified(struct ftdi_context *ftdi, unsigned char *buf,  int size);
< #endif
<

and in libcam84.c the changes are
312c312
<       dwBytesRead=ftdi_read_data_modified(CAM8A,FT_In_Buffer,0);
---
>       dwBytesRead=ftdi_read_data(CAM8A,FT_In_Buffer,0);
338c338
<       dwBytesRead=ftdi_read_data_modified(CAM8A,FT_In_Buffer, 8*mdeltX);
---
>       dwBytesRead=ftdi_read_data(CAM8A,FT_In_Buffer, 8*mdeltX);
367c367
< 	  dwBytesRead=ftdi_read_data_modified(CAM8A,FT_In_Buffer, 2*mdeltX);
---
> 	  dwBytesRead=ftdi_read_data(CAM8A,FT_In_Buffer, 2*mdeltX);
965,980d964
< }
< 
< int ftdi_read_data_modified(struct  ftdi_context * ftdi, unsigned char * buf, int size)
< {
< 	int rsize = ftdi_read_data(ftdi, buf, size);
< 	int nsize=size-rsize;
< 	int retry=0;
< 	while((nsize>0)&(retry<20))
< 	{
< 		retry++;
< 		usleep(500);
<  //	     	 fprintf(stderr,"Try %d since %d<>%d \n",retry, rsize,size);
< 	        rsize = rsize+ftdi_read_data(ftdi, buf+rsize, nsize);
< 		nsize = size - rsize;
< 	}
< 	return rsize;
7 years 4 months ago #12731

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Replied by gehelem on topic Help with DIY CCD driver

very clever, it works for me quite well !
i can now run to baudrate 150 without errors
EDIT : never goes more than 1 or 2 retry, and ... 1us sleep...
Only first read often needs to wait
Last edit: 7 years 4 months ago by gehelem.
7 years 4 months ago #12732

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Replied by Michael F. Toups on topic Help with DIY CCD driver

Glad it works for you.

The old netbook I want to run the camera on gets lots of retries during a read at the 150 setting, but is successful. Sometimes goes to 4 or 5 retries. I had some hiccups with only 1 us of sleep where the read actually failed due to max number of retries but 10 us worked fairly well.
7 years 4 months ago #12734

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Replied by gehelem on topic Help with DIY CCD driver

My new Cam86 is working, and this is my very first picture with brand new indi driver !! i'm so excited!! :woohoo: :woohoo:
[url=
File Attachment:
][/url]
very "beta test" but this is the first step
The following user(s) said Thank You: Jasem Mutlaq
7 years 3 months ago #13430

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Replied by Michael F. Toups on topic Help with DIY CCD driver

speaking of the version indi_cam84_ccd on GitHub, did you incorporate the fix for the read? If not, I could probably create a branch today with those changes and request a "pull" back to the master branch.
7 years 3 months ago #13431

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