LPM rom

thanks for the reply !

but if i have to use hex? is it the same? by the way, wats the different between hex and mif file?

u mean unsigned decimal input...does that refer to integer only? what about real number with fraction??

and the address to the rom..is it compulsory to be 16bit (4 hex)?

thank you very much.

but how do you create hex file with decimal number? i mean if hex i just do like:

:03800000028100FA

but if using decimal how? and if using decimal so the output of the rom shd be declared as integer?

sorry for the trouble....

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thank you very much.

but how do you create hex file with decimal number? i mean if hex i just do like:

:03800000028100FA

but if using decimal how? and if using decimal so the output of the rom shd be declared as integer?

sorry for the trouble....

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.mif and .hex are simply different file formats used to store the initialization data.

A mif file looks like this

WIDTH=8;

DEPTH=256;

ADDRESS_RADIX=UNS;

DATA_RADIX=UNS;

CONTENT BEGIN

0 : 100;

1 : 101;

2 : 0102;

[3..255] : 0;

END;

You can see the Address and data radix are set to UNS (Unsigned). This can be changed to HEX/Decimal etc.

To make one of these Use the Quartus File menu->New->Other Files->Memory Initialization File

and follow the prompts to build the size you want

You can change the radix by right clicking on the data columns of the editor.

You can also manually edit the generated mif file with text editors etc

Hope this helps

Vern

thank alot vernmid!

seems like using mif is more convenient than hex file!

i will try it out! thanks alot!!

hi, i have a question.

it is possible the data for rom in signed number?

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When you create the MIF (Memory initialization file) for the ROM, you will need to enter unsigned decimal numbers.

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what its mean? i try to make a look up table content pre compute data... the data set in signed number... i try to using that MIF file, but it fail.. :confused:

thank you with response from all...