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• How do I get a Canon LBP 2900 printer working?

  - by elektron

  i am unable to set up my canon lbp2900 printer on ubuntu12.04 64 bit i aliened the 64 bit rpm drivers and then installed the drivers (version 2.40) and followed the procedure in the canon guide ( however i changed fifo path to //localhost:59787 (somebody suggested) instead of 59687 (as suggested by canon guide) ) intially i got the message pstocapt failed .. the drivers had put the pstocapt and backend/ccp in the lib64 directory instead of the lib directory ... i copied that to the aproprite directory under lib but still i get the error "ccp send_data error exit " i also tried with fifo path //localhost:59687 i also tried the Radu script but the drivers the script uses are version 1.90 and has conflicting packages

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• Python: Serial Transmission

  - by Silent Elektron

  I have an image stack of 500 images (jpeg) of 640x480. I intend to make 500 pixels (1st pixels of all images) as a list and then send that via COM1 to FPGA where I do my further processing. I have a couple of questions here: How do I import all the 500 images at a time into python and how do i store it? How do I send the 500 pixel list via COM1 to FPGA? I tried the following: Converted the jpeg image to intensity values (each pixel is denoted by a number between 0 and 255) in MATLAB, saved the intensity values in a text file, read that file using readlines(). But it became too cumbersome to make the intensity value files for all the 500 images! Used NumPy to put the read files in a matrix and then pick the first pixel of all images. But when I send it, its coming like: [56, 61, 78, ... ,71, 91]. Is there a way to eliminate the [ ] and , while sending the data serially? Thanks in Advance! :)

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