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Altera_Forum
Honored Contributor I
721 Views

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?
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2 Replies
Altera_Forum
Honored Contributor I
44 Views

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

Altera_Forum
Honored Contributor I
44 Views

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.

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