FFT on MCF5485

JShilinski — Mon, 24 Nov 2008 07:22:49 GMT

Hey guys, I'm trying to get the freescale FFT (included as the attachment) to work on the MCF5485 using CW 7.0.

The issue I have is the source code (written in assembly) doesn't compile. I attached the compile errors via a screen shot. The only file I included in the project was the one attached, DSP32.s. (renamed to DPS.txt because the forums won't let me attach the *.s file)

Does anyone have any idea how to get this FFT to work on the target platform?

-Jay

Re: FFT on MCF5485

SimonMarsden_de — Mon, 24 Nov 2008 18:07:37 GMT

Hello Jay

Getting this file to assemble with CodeWarrior should be quite easy. You need to do four things:

(1) Add this as the first line:
    .option processor=mcf5485

(2) Comment out the following line:
;;;        .name   "dsp32.s"

(3) Change the lines which use EQU to use .equ instead (note the leading '.'), e.g:

    CACR    .equ    $002

(4) For lines which use indexed addressing, you must explicitly specify the index length (always long for ColdFire), e.g. change

        lea    (a0,d1),a2 -----> lea    (a0,d1.l),a2

(There are about 8 lines like this)

Hope this helps

Simon

ColdFire/68K Microcontrollers and ProcessorsのトピックRe: FFT on MCF5485

FFT on MCF5485

Re: FFT on MCF5485