Thursday, October 25, 2012

CY8C20224-12LKXI Designing with PSoC Designer

CY8C20224-12LKXI Designing with PSoC Designer
The development process for the PSoC device differs from that
of a traditional fixed-function microprocessor. The configurable
analog and digital hardware blocks give the PSoC architecture a
unique flexibility that pays dividends in managing specification
change during development and lowering inventory costs. These
configurable resources, called PSoC blocks, have the ability to
implement a wide variety of user-selectable functions. The PSoC
development process is:
1. Select user modules.
2. Configure user modules.
3. Organize and connect.
4. Generate, verify, and debug.
Select User Modules
PSoC Designer provides a library of prebuilt, pretested hardware
peripheral components called “user modules.” User modules
make selecting and implementing peripheral devices, both
analog and digital, simple.
Configure User Modules
Each user module that you select establishes the basic register
settings that implement the selected function. They also provide
parameters and properties that allow you to tailor their precise
configuration to your particular application. For example, a Pulse
Width Modulator (PWM) User Module configures one or more
digital PSoC blocks, one for each eight bits of resolution. Using
these parameters, you can establish the pulse width and duty
cycle. Configure the parameters and properties to correspond to
your chosen application. Enter values directly or by selecting
values from drop-down menus. All of the user modules are
documented in datasheets that may be viewed directly in
PSoC Designer or on the Cypress website. These user module
data sheets explain the internal operation of the user module and
provide performance specifications. Each datasheet describes
the use of each user module parameter, and other information
that you may need to successfully implement your design.
Organize and Connect
Build signal chains at the chip level by interconnecting user
modules to each other and the I/O pins. Perform the selection,
configuration, and routing so that you have complete control over
all on-chip resources.
Generate, Verify, and Debug
When you are ready to test the hardware configuration or move
on to developing code for the project, perform the “Generate
Configuration Files” step. This causes PSoC Designer to
generate source code that automatically configures the device to
your specification and provides the software for the system. The
generated code provides APIs with high-level functions to control
and respond to hardware events at run time, and interrupt
service routines that you can adapt as needed.
A complete code development environment allows you to
develop and customize your applications in C, assembly
language, or both.
The last step in the development process takes place inside
PSoC Designer's Debugger (accessed by clicking the Connect
icon). PSoC Designer downloads the HEX image to the ICE
where it runs at full speed. PSoC Designer debugging capabilities rival those of systems costing many times more. In addition
to traditional single-step, run-to-breakpoint, and watch-variable
features, the debug interface provides a large trace buffer. It
allows you to define complex breakpoint events that include
monitoring address and data bus values, memory locations, and
external signals

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