On Wed, Nov 7, 2012 at 9:22 AM, Timo Teras <timo.te...@iki.fi> wrote: > Hi, > > On Tue, 06 Nov 2012 18:06:51 -0600 "Ing. Alfredo Alarcon" > <frekoalar...@gmail.com> wrote: > >> Hi, sorry for my bad english, my name is Freko from Mexico, have a >> 4000b reader and a Beaglebone ARM 7 with Ubuntu 12.04 and kernel 3.2. >> >> I successfully installed libfprint from sources and all dependencies >> from the repository, except libmagick9-dev Ubuntu suggested me >> another one, all compilations are fine, when run the examples detects >> my reader fine, but when takes the image send the next error: >> >> uru4000:error [imaging_run_state] bad captured image (289 lines) or >> size mismatch 111041 != 111040 > > The error implies you have fresh git checkout with my uru4500 patch > applied. So that change probably introduced this :/ > > Basically the device is sending one more byte than expected. The extra > byte could come because of problem in: > - Host USB hardware > - Bug in USB driver for your hardware in linux kernel > - Or error due to some architecture specific bug in the code > - Bug in my patch > >> But if i run the same examples in my PC with Ubuntu 10.04 kernel 2.6, >> everything works fine, gets a image from the reader and save this in >> the same carpet in pgm format. I hope my problem have a solution. > > If possible, could you get USB captures of what is happening? > See: http://wiki.wireshark.org/CaptureSetup/USB#Linux > > Alternatively, if the junk byte is at the end of the transfer, just > modfying to length assertation should be ok: > > --- a/libfprint/drivers/uru4000.c > +++ b/libfprint/drivers/uru4000.c > @@ -687,8 +687,8 @@ static void imaging_run_state(struct fpi_ssm *ssm) > fp_dbg("hw header lines %d", img->num_lines); > > if (img->num_lines >= IMAGE_HEIGHT || > - urudev->img_transfer->actual_length != img->num_lines * > IMAGE_WIDTH + 64) { > - fp_err("bad captured image (%d lines) or size > mismatch %d != %d", > + urudev->img_transfer->actual_length < img->num_lines * > IMAGE_WIDTH + 64) { > + fp_err("bad captured image (%d lines) or size > mismatch %d < %d", > img->num_lines, > urudev->img_transfer->actual_length, > img->num_lines * IMAGE_WIDTH + 64); > > Maybe this helps. > > Cheers, > Timo
Hi, That could be an alignment issue, could you guys try attached patch? At least it should not break anything. Regards Vasily
uru4000-portability-fix.patch
Description: Binary data
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