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 _______________________________________________ fprint mailing list fprint@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/fprint