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Lab 2. CCS Introduction

Plateform: – Spartan 6/OMAP-138 coprocessing kid

– FPGA: Xilinx Spartan 6

– DSP: TI 6000

– CUP: ARM processor Code composer studio (CCS):

– An integrated development environment (IDE) for Texas Instruments (TI) embedded processor families.

– It includes compilers for each of TI's device families, source code editor, project build environment, debugger, profiler, simulators, real-time operating system and many other features.

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The plateform: PowerOn/offEthernet plug

USB plug

S7 switch

Reset

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The setting of S7 switch:

The first, the fifth, and the eighth switches must be on (DSP only).

The other setting is that all are off except the first one (DSP and ARM).

Turn on the plateform.

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Activate the CCS form the Program files– TI Code composer studio v5

First, you have select a directory for the workspace.

Then, File New create a CCS project. Give a project name and select the family of the device as

C6000, and the variant as OMP138.

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Click the finish icon and you are ready to edit a C file. After you finish the editing, you can select

– Proj Built all Make sure you are in the Edit mode rather than Debug

mode (shown on the right up corner). Then, click

– Run Debug (link/loading) If there is an error indicating the system is in reset, then

press Reset and try again. If there is an error indicating a target configuration is

needed, press “yes” and – Select the device TI XDS100v2 USB emulator,

– Then press “save”.

* Print a couple of words.

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Finally, you can click Run Resume to execute the program.

If you want to execute the program again, you can click Run Restart

Once the program has been executed, you can click the Terminate to return the edit mode.

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Icons: Resume Terminate

Pause

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Make sure to include stdio header file (#include <stdio.h>)

Practice 1:– Run the convolution program created in the last week in the

CCS environment.

In CCS, you can plot the signal stored in the memory.– Must in the pause mode (put an idle loop).

– Debug Run Pause

– Tools graphic single time

– Change the parameters for the plot

* for (; ;) { }

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Then,

length

data type

decimationfactor

signal display length

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You can also plot the spectrum of a signal.– Tools graph FFT magnitude

interlaced input

Complex

FFT size: 2n

Graph properties:re-input parameters

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CCS provides many build-in routines in its libraries. Before they can be used, we have to do some setup.

Select Project and then Properties:– Properties C6000 compiler include options

– Add one option: “C:\Program Files\Texas Instruments\dsplib_c674x_3_1_0_0\packages\” (in the upper blank)

– Properties C6000 linker file search path

– Add one file: “C:\Program Files\Texas Instruments\dsplib_c674x_3_1_0_0\lib/dsplib.a674” (in the upper blank)

Copy dsplib.h into the project you are working on and add “ #include “dsplib.h” ” in your C program.

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Use the convolution routine from the DSP library:– DSPF_sp_convol(x, h, y, nh, ny);

– x: input signal, h: filter, y: output signal

– nh: length of h, ny: length of y (both have to be even)

– x has to be zero padded (before and after x)

If there are more than one C programs in a project. You can de-activate one by pressing right mouse on the file and selecting Recourse configuration and then Exclude from Build ... (check Debug and Release)

Practice 2:– Use the build-in routine to conduct the convolution

operation and compare the result with the one you have written.

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Use the FFT routine from the DSP library:– DSPF_sp_fftSPxSP(N, x, w, y, brev, n_min, offset, n_max)

– N: the size of FFT (N=2m)

– x, y: input/output (even: real, old: imaginary) with length 2N

– brev: unsign characters with 64 entries (defined globally)

– w: generated by another function gen_twiddle_fft_sp(w,N)

– n_min: 2 or 4 (N=2m; and m is divided by 2 or 4; choose the larger one)

– offset: index from the start of main FFT (typical 0)

– n_max: N

Practice 3:– Use the build-in routine to see the spectrum of the signals

generated in Practice 2.

* After the calling, the input values may be changed (must be defined as global var. for plotting)

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Reading assignment:– Digital modulation: PAM, QAM (CS: 6.1-6.4)

– AWGN

– Error probability (Q-function) * Textbooks: CS: Communication System S&S: Signals and Systems