.mif file problem

Question

Hi,everyone ! i got a 256*256 gray-scale lena picture.i want to store it into the sram.Due to the limitation of the FPGA internal memory size. i divided the picture into 2 mif file, and send it to the sram "manually" . is there any method to send more than 2 mif files , and store it into the sram "automatically" ?

<note> i have already tried to store the 256*256 image to one mif file, but during the compile process , the compiler showed me the memory is out of useage.

altera_forum · Answer

a mif file is meant to be associated with actual memory. Once compiled that memory is initialised by mif values. You can't send mif after mif...you send what is in memory.

If you receive the image into your fpga and want to send it to sram then send it as it comes , you don't need fpga memory to hold it first...

if you mean you have your image data in a file(on PC) then let nios read that into sram directly.

altera_forum · Answer

thanks for your replying,KAZ! But is there any possible way sending data directly to my design without storing in th rom first ?

i wrote a VGA interface which can recive 8 bits data and display on the monitor, if i want to show an 640*480(or bigger) gray-scale image on the screen.How can i send the pixel data directly to my vga input without saving in the rom or ram, because of the limitation of its storage.

altera_forum · Answer

Hi,

Naturally if you haven't enough storage inside fpga for your application then you need external memory like your sram idea in the first post. You can send data to sram via fpga without the need for mif files or fpga memory.

altera_forum · Answer

Thx! but what i am trying to do is playing a video. and my cyclone II fpga only have 2M sram, that means i have not enough space to store my video data in the sram. i want to send video data to my vga input without saving it first. is sopc or nios is a solution? or all the data i want to process or display "must" store it in the rom or sram first?

altera_forum · Answer

Hi,

The primary idea is not storage by itself but that data should be sent to vga at required speed. Are you sure about your sram size, is it 2MBytes or 2 Mbits? your data is 640x480 bytes.

You may also consider sharing fpga memory with sram if so but it gets complicated.

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.mif file problem

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