Cypress Semiconductor PSoCEval User Guide and Example Projects
PSoCEval User Guide
and Example Projects
Cypress MicroSystems, Inc.
2700 162nd Street SW, Building D
Lynnwood, WA 98037
Phone: 800.669.0557
Fax: 425.787.4641
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TABLE OF CONTENTS
INTRODUCTION TO PSOCEVAL
Introduction to the PsoCEval.....................................3
What Comes with my PSoCEval? .............................4
PSoCEval Power Supply Options..............................6
Introduction to MiniProg ...........................................7
Specications for MiniProg ....................................... 9
Operating Changes to the PsoCEval..........................9
Introduction to Example Projects.............................10
Example #1 ADC Conversion and LCD Display ......................11
Example #2 Blink an LED.........................................................16
Example #3 Output a SINE Wave..............................................19
Example #4 Dynamically Re-congure a PWM .......................24
Example #5 Combine PWMs using Output Logic ....................29
Cypress Support.......................................................32
Welcome to the new exciting world of the PSoCEval!
PSoCEval allows you to evaluate what PSoC has to offer. The
board includes an LCD module, potentiometer, LEDs, and plenty
of breadboard space. This user guide includes ve different
example projects that can be used with the PSoCEval board. The
MiniProg can program both the PSoC on your PSoCEval board or
on a proto board you might build using a ve-pin header.
The example projects can answer your questions. Want to see how
PSoC can talk with an LCD? Hook up the LCD module and output
your sensor’s data. Curious how PSoC’s dynamic re-conguration
is reshaping how designers do business? Switch back and forth
between different types of PWMs. Test both the digital and analog
resources of our system-on-a-chip in your application.
Use PSoCEval to gain insight into how the PSoC’s breadth of
exibility and functionality can work for you!
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WHAT COMES WITH MY PSOCEVAL?
Please conrm that your kit includes the following items:
• PSoCEval Evaluation Board
• MiniProg Programmer
• LCD Module
• CY8C29466-24PXI 28-Pin DIP Sample
• PSoC Designer CD
• USB Cable
• Wire Pack
• User Guide
For additional technical information a schematic is available online
at www.cypress.com/ >> Developer Kits.
Regulator
Breadboard
RS232
Transceiver
ISSP Header
Reset
Button
POT
Button
LCD
Contrast
LCD Module
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PSOCEVAL POWER SUPPLY OPTIONS
INTRODUCTION TO MINIPROG
The following are PSoCEval power supply options:
1. Powered by the MiniProg unit.
2. Powered by a 9-12V DC wall transformer with
positive tip barrel plug and a 100 mA or higher rating.
Recommended model is CUI Inc., EPAS-101W-12.
3. Powered by a 9V battery connected to battery terminals.
4. Powered from the ICE pod in socket.
Only one of the power supplies should be used at a time. Do not
use a power supply that is less than 9V or exceeds 12V.
The Cypress MicroSystems MiniProg gives you the ability to
program PSoC parts quickly and easily.
It is small and compact, and connects to your PC using the
provided USB 2.0 cable.
During prototyping, the MiniProg can be used as an in-system
serial programmer (ISSP) to program PSoC devices on your PCB.
(See Application Notes AN2014 and AN2026 available online at
www.cypress.com for more details.)
For production purposes, it is recommended that you use the
CY3207ISSP programmer or a third-party production programmer.
Once the MiniProg is connected, you can use PSoC Programmer
software to program. (This free software can either be launched
from within PSoC Designer or run as a stand alone program.)
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SPECIFICATIONS FOR MINIPROG
OPERATING CHANGES TO THE PSOCEVAL
The operating temperature of the MiniProg is from 0° C to 50° C.
Always plug the USB cable into the MiniProg before attaching it
to the ve-pin header on the board.
When using an ISSP adapter cable with MiniProg, keep the length
under six inches to avoid signal integrity issues.
When using MiniProg, the LEDs blink at a variable rate to track
connection status. The green LED near the USB connector turns
on after MiniProg is plugged into the computer and congured by
the OS. If MiniProg cannot nd the correct driver in the system,
this LED will not turn on. After the device has been congured,
the LED stays on at about a 4-Hz blink rate. This changes during
programming, where the blink duty cycle increases.
The red LED at the bottom turns on when the MiniProg powers the
part. The LED is off when power is provided by the target board.
To use an external 32 kHz crystal oscillator, R8 and R9 on the
PSoCEval board must be removed. C9 and C10 must be added,
with values determined by the type of feedback desired. It is
recommended that you use unbalanced feedback, with C9 at 12
pF and C10 at 100 pF. (See Application Note AN2027 online at
www.cypress.com for complete details.)
To use PSoCEval at 3.3V, two parts will need to be swapped on the
board: the regulator and the RS232 transceiver, shown in Figure 1.
Suitable replacements or their equivalents are as follows:
Regulator:
TI UA78M33CKTPR
(Digikey 296-13425-1-ND)
RS232 Transceiver:
Maxim MAC3232CSE
(Digikey MAX3232CSE-ND)
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INTRODUCTION TO EXAMPLE PROJECTS
Four Example Projects are described in the following sections.
Each section is organized as follows:
EXAMPLE PROJECT #1 ADC CONVERSION
AND LCD DISPLAY
Project Name: ASM_Example_ADC_UART_LCD
Project Name: PSoC Designer project name.
Purpose: Overview of the project.
Implementation: Describes the funtionality.
Connections: Pin connections to wire up the PSoCEval board.
Pictures are included to help you verify your wiring for each
project.
Example Code (main.asm): Code to run the project.
The example projects are available in PSoC Designer. To use
them, open PSoC Designer and browse to select the correct
le. The example projects are found in …\Program Files\Cypress
MicroSystems\ PSoC Designer\Examples. Choose the chip type you
desire and open the project’s .soc le (CY8C29x66 comes with the
PSoCEval board).
When using the MiniEval programmer, do not use the “Connect”
and “Download” buttons in PSoC Designer. Theys are for use with
an In-Circuit Emulator (ICE).
Purpose: To demonstrate the 12-bit incremental ADC by
measuring the voltage of the potentiometer, transmitting the
conversion result out the UART, and displaying it on the LCD.
Implementation: This project enables the LCD, UART and
ADCINC12, and then goes into an endless loop.
In the loop, the ADC status (as it monitors the potentiometer) is
checked. If the ADC has completed a conversion, the result is
placed in “iResult” and the HEX value is transmitted out the serial
port and displayed on the LCD as ASCII text.
The clock divider VC1 provides a sample clock of 3 MHz to the
ADCINC12, resulting in a sample rate of 180 samples per second.
The clock divider VC3 generates the baud clock for the UART by
dividing 24 MHz by 156.
The UART internally divides VC3 by 8, resulting in a baud rate of
19,200 bps.
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