Dsp2 Adda Demos

7/30/2019 Dsp2 Adda Demos

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University of MariborFaculty of Electrical Engineering and Computer ScienceSmetanova ulica 17, 2000 MariborSloveniaINSTITUTE Of ROBOTICS

October, 2005 ADDA interface card demos

Authors: Darko Hercog

Suzana Uran

dsp2lib version: 1.5.04

Terminal version: 1.5.5

MATLAB version: 6.5

ADDA I n t e r f a ce Ca r d L ib r a r y a n d

D em o n s t r a t i o n Ex a m p l e s

Technical Documentation


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TABLE OF CONTENT i

TABLE OF CONTENT

1. ABOUT THIS DOCUMENTATION ....................................................................1

2. ADDA INTERFACE CARD HARDWARE DESCRIPTION .....................................2

3. SIMULINK BLOCKS FOR ADDA INTERFACE CARD..........................................4

ADDA analog input 1...................................................................................... 6ADDA analog input 2...................................................................................... 7ADDA analog output ...................................................................................... 8ADDA DSP-2 Interface block ........................................................................... 9

4. DEMO EXAMPLES FOR DSP-2 ADDA INTERFACE CARD................................10

4.1. DEMO EXAMPLE OF DSP-2 LEARNING MODULE AND ADDA INTERFACE CARD .........................10

5. APPENDIX ..................................................................................................13


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TABLE OF FIGURES ii

TABLE OF FIGURES

Figure 1: photo of ADDA interface card ....................................................................... 2Figure 2: The circuit of the ADDA interface card............................................................ 2Figure 3: photo of DSP-2 learning module, ADDA interface card and custom breadboard .... 3Figure 4: ADDA interface card Simulink library ............................................................. 4Figure 5: ADDA interface card blocks in Simulink Library Browser ................................... 5Figure 6: GUI of ADDA DSP-2 Interface block............................................................... 6Figure 7: GUI of ADDA DSP-2 Interface block............................................................... 7Figure 8: GUI of ADDA DSP-2 Interface block............................................................... 8Figure 9: GUI of ADDA DSP-2 Interface block............................................................... 9Figure 10: ADDA DSP-2 Interface block algorithm......................................................... 9Figure 11: DSP-2 ADDA interface card demos .............................................................10Figure 12: Simulink block scheme of ADDA simple demo example ..................................11

Figure 13: demo example in DSP Terminal..................................................................12Figure 14: DSP-2 learning module connector...............................................................13


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CHAPTER 1: ABOUT THIS DOCUMENTATION 1

1. About this documentation

In this documentation short hardware description of the ADDA interface card is presented.

It is assumed that user is familiar with DSP-2 controller, DSP-2 Library for Simulink and DSP

Terminal. If this is not the case the user is kindly invited to read the documentation which

could be found on the following internet address:

http://www.ro.feri.uni-mb.si/projekti/dsp2/documentation.htm

Related documentation:

DSP-2 Users Manual

DSP-2 Library for Simulink Users Manual

DSP Terminal Users Manual


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CHAPTER 2: ADDA INTERFACE CARD HARDWARE DESCRIPTION 2

2. ADDA interface card hardware descript ion

ADDA interface card (Figure 1) is an interface between D/A converter and two A/D

converters (A/D 1 and A/D 2) of the DSP-2 learning module. The output of the D/A

converter is called AO (Analog output). The input for A/D 1 converter is called AI1, and

similarly the input for A/D 2 converter is called AI2. The +, - and GND pins are power supplypins for power supply needed in the case of active circuits built on the breadboard. + means

+15 V power supply, - means 15 V power supply, and GND is ground (Figure 14).

Figure 1: photo of ADDA interface card

The circuit of the ADDA interface card is shown in Figure 2. It consists of three voltage

followers (buffers) and 2 resistor dividers.

Figure 2: The circuit of the ADDA interface card

Detailed description of DSP-2 connector can be found on page 13.

The D/A output voltage range is between 0 and 8 V therefore the AO output voltage range is

the same. The A/D 1 and A/D 2 input voltage range is between 2 V. The allowed input

voltage range for AI1 and AI2 is between +/- 12 V. The two resistor dividers reduce the

input voltage range of AI's to the range of A/D inputs.


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CHAPTER 2: ADDA INTERFACE CARD HARDWARE DESCRIPTION 3

Figure 3: photo of DSP-2 learning module, ADDA interface card and custom breadboard


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CHAPTER 3: SIMULINK BLOCKS FOR ADDA INTERFACE CARD 4

3. Simulink blocks for ADDA interface card

In this chapter, Simulink blocks for DSP-2 ADDA interface card are described. Blocks are

placed in DSP-2 ADDA Library (Figure 4). To access this library, enter dsp2addalib in

MATLAB command window. Blocks are also accessible in Simulink Library Browser underDSP-2 controller -> Plants -> ADDA interface card (Figure 12).

Figure 4: ADDA interface card Simulink library


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Figure 5: ADDA interface card blocks in Simulink Library Browser


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ADDA analog input 1

Description: ADDA Analog Input 1 block reads analog voltage at the input port AI1

(input of A/D 1 converter) of the ADDA interface card. The range of the

input voltage is +/- 12 V.

Note: this block should be placed in Simulink model only, ifADDA interface

card is attached to the DSP-2 learning module.

Figure 6: GUI of ADDA DSP-2 Interface block

Parameters: Sample time

Sample time must be an integer multiple of the base sample time (Fixed

sample time parameter).


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ADDA analog input 2

Description: ADDA analog input 2 block reads analog voltage at the input port AI2 (input

of A/D 1 converter) of the ADDA interface card. The range of the input

voltage is +/- 12V.








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ADDA analog output

Description: ADDA analog output block sets output voltage at AO port of DSP-2 learning

module (output of D/A converter) to the value specified at the input of the

block. The range of output voltage is +/- 8 V.








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ADDA DSP-2 Interface block

Description: ADDA DSP-2 Interface block contains all blocks that are needed when

developing algorithm for DSP-2 ADDA interface card (Figure 10). This

interface block contains ADDA analog output, ADDA analog input 1, ADDAanalog input 1 blocks (Figure 10). Description of these blocks can be found

on pages 6, 7 and 8.




Figure 10: ADDA DSP-2 Interface block algorithm





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CHAPTER 4: DEMO EXAMPLES FOR DSP-2 ADDA INTERFACE CARD 10

4. Demo examples for DSP-2 ADDA interface card

For easier beginning with DSP-2 learning module and ADDA interface card, demonstration

examples are prepared. All DSP-2 related demonstration examples are placed inside

MATLAB demos. You can access to DSP-2 demos by typing demos in MATLAB command

window. In Help window navigate to Blocksets > DSP-2 Library for Simulink > ADDAinterface card (Figure 11).

Figure 11: DSP-2 ADDA interface card demos

4.1. Demo example of DSP-2 learning module and ADDA interface card

After the ADDA simple example is selected in ADDA interface card folder (Figure 11),

Simulink model shown in Figure 12 will appear.


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Figure 12: Simulink block scheme of ADDA simple demo example

In the left above corner of the Simulink block scheme Edit Parameters, Update Parameters,

Buildand HELPbuttons exist.

In order to run demo on DSP-2 controller follow the steps:

double click Update Parameters button and then

double click Build button.

Double click on Buildblock starts the code generation process for the DSP-2 controller from

Simulink block scheme. When the code generation process is completed, DSP Terminal

program is automatically invoked and generated code is downloaded to the DSP-2 learning

module.

On the ADDA interface card place a wire connection between AO port and AI1 port. In DSP

Terminal select PG_OUT and AI1. After this, selected signals will appear in Terminal graph

(Figure 13). Parameter inspector window (Figure 13) enables on-the-fly parameter tuning.

In this demo example, pulse generator amplitude, pulse generator frequency and both gains

(AD1_GAIN, AD2_GAIN) are changeable in online mode (meanwhile generated code is

executing on DSP-2 controller).

More informations about DSP Terminal can be found in DSP Terminal Users Manual:

http://www.ro.feri.uni-mb.si/projekti/dsp2/documentation.htm

Now you can place custom plant between AO, AI1 and AI2 ports.


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Figure 13: demo example in DSP Terminal


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CHAPTER 5: APPENDIX 13

5. Appendix

DSP-2 learning module connector

Figure 14: DSP-2 learning module connector

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