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Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

VIP scaler problem:cann't dynamically control the input image width

I'm using quartus9.1 to generate an scaler. I configured the scaler as following:

turn off the Run-time control of image size

input image width 300

intput image height 300

output image width 100

output image hight 100

parallel.

other settings are default.

If I test the scaler as described above(the control packet set the input format as:300*300), the circuit behaves normall.

However,when I changed the input image size to 100*100 in the circuit using a control packet(I'm quite sure that the control packet format is correct) ,the scaler could not behave correctly.At the end of the simulation, the dout_startofpacket goes high and dout_endofpacket never goes high.

What's the problem here?

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    The scaler Run-time control of image size has to be enabled otherwise the scaler will ignore your control packets.

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    Thank you. I think the vip userguide is too vague.Only after you have tried a lot of time can you finally understand what it really means.