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Cypress PSoC 可配置混合信号片上系统 简介 PowerPoint PPT Presentation


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Cypress PSoC 可配置混合信号片上系统 简介. Luo Sai (keith @ BBS) 科大 11 系博 2005.3.27. Agenda. 嵌入式系统简介 PSoC 可配置混合信号片上系统 开发环境和开发流程 回顾 & 展望. 感性认识: What’s PSoC. What’s PSoC ? PSoC = Programmable System-on-Chip 可配置(混合信号)片上系统 是 Cypress 生产的一种面向嵌入式应用的芯片 用单片就可以构成一个系统,即 SoC(System on Chip)

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Cypress PSoC 可配置混合信号片上系统 简介

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Cypress psoc

Cypress PSoC 可配置混合信号片上系统简介

Luo Sai

(keith @ BBS)

科大11系博

2005.3.27


Agenda

Agenda

  • 嵌入式系统简介

  • PSoC 可配置混合信号片上系统

  • 开发环境和开发流程

  • 回顾 & 展望


What s psoc

感性认识:What’s PSoC

  • What’s PSoC ?

  • PSoC = Programmable System-on-Chip 可配置(混合信号)片上系统

  • 是Cypress生产的一种面向嵌入式应用的芯片

  • 用单片就可以构成一个系统,即SoC(System on Chip)

  • 低成本(几个$),用于替代C51等8位机系统

  • PSoC的特点

  • 混合信号处理

  • 可配置的互连通路

  • 运行时动态配置

  • 软/硬件设计方法


Cypress psoc

  • 嵌入式系统简介


Cypress psoc

嵌入式系统 简介

  • 嵌入式系统

  • 执行专用功能

  • 并被内部计算机控制的设备或者系统

  • 为什么叫“嵌入”?

  • 早期:专用的大型设备和机房

  • 70年代:出现微处理器和微型计算机,小、价廉、可靠

  • 其数值计算能力和智能化水平引起控制专业人士注意,被电气加固和机械加固,并配以外围接口,“嵌入”到控制系统中。


Cypress psoc

  • 比较(追求的目标不同)

  • 通用计算机系统

    • 高速:8086286386…P4

    • 海量存储:640KB预言

    • 易用性:Windows…

  • 嵌入式系统

    • “嵌入”(体积小):如买学生票的那个纸片

    • 智能化控制:51、PIC、68k等指令集

    • 高可靠性:看门狗、一些编程技术

    • 低功耗:手机的待机时间

    • 安全:如一卡通

    • ……


Cypress psoc

  • 嵌入式系统的两个基本特征

  • 首先,是专用的,解决现实世界的真实问题

    • 大自然是模拟的连续的,必须要能够处理模拟信号

  • 其次,是智能的,带一定的计算能力

    • 计算能力依靠离散的数字电路完成

CPU


Cypress psoc

  • PSoC的单芯片解决方案:

  • PSoC=M8C CPU核+模拟阵列+数字阵列+其它

  • 数字阵列+M8C:数值计算和通信

  • 模拟阵列:处理模拟信号

  • PSoC的设计如同搭积木般,将不同功能的模块安放到不同的位置上,并用线连接起来

  • 低成本


Cypress psoc

更低的成本:一个报警器的例子

Traditional Solution

Cypress Solution

PSoC BOM =$4.80

System BOM =$6.07


Cypress psoc

  • 设计过程

  • IDE工具:PSoC Designer,图形界面(GUI)

  • 硬件设计方法

    • 在IDE中配置数字块和模拟块,并设置互联通道

    • IDE自动生成硬件的初始化代码,以及所配置功能的编程库

  • 软件设计方法

    • C语言,以及汇编

    • 进入main()之前,系统自动配置并初始化硬件

    • C程序可使用前面生成的编程库

  • 特点

    • 软硬件都在同一个环境中完成设计

    • 硬件可以动态改变(这些代码也是自动生成的)


Cypress psoc

  • PSoC

  • 可配置混合信号片上系统


Cypress psoc

  • PSoC = Programmable System-on-Chip

    • PSoC is a configurable mixed signal array with an on board controller.

    • Create your customized chip.

      User Defines:

WhatFunctions Appear

WhenThey Appear

HowThey Interconnect


Example of what functions appear

Example of “What Functions Appear”

  • PSoC can be defined to meet customer requirements with Countless configuration possibilities

  • Both of these devices are made from the same chip!

Device 1

Device 2

  • One 16-Bit Counter

  • One 8-Bit PWM

  • One Half-Duplex UART

  • One SPI Master

  • One 12-Bit Incremental A/D

  • One Low-Pass Filter

  • One 8-Bit D/A

  • Two Instrumentation Amplifiers

  • One 8-Bit Counter

  • One 16-Bit Timer

  • One Full-Duplex UART w/Baud Rate Generator

  • One SPI Slave (Full Duplex)

  • One 4-Input 8-Bit Delta-Sigma A/D

  • One 6-Bit D/A

  • One 8-Bit D/A

  • Two Low-Pass Filters


When functions appear in application reuse of resources

“When Functions Appear”In-Application Reuse of Resources

  • Dynamic Reconfiguration allows multiple function sets to operate on the SAME CHIP at DIFFERENT TIMES in the SAME APPLICATION

  • Example:

  • 23 Hours 59 minutes per day

    • Accepts Money

    • Distributes Beverages

  • A few seconds each night

    • Dynamically reconfigures into a 300 baud Modem

    • Transmits coin, beverage and maintenance status to central office

  • Benefits

    • Only cost delta is phone interface

    • Increased machine profitability


Cypress psoc

How They Interconnect

  • Define connections between pins and function blocks

  • Define connections between function blocks

  • Define clock paths

  • Change connections dynamically too!


Psoc blocks

PSoC Blocks


Digital psoc blocks

Digital PSoC Blocks

  • Eight 8-bit Digital PSoC Blocks Available

  • Two Types:

    • Basic (4)

    • Communications (4)

  • - Programmed at the

  • Functional Level

  • - Not Programmed at the

  • Gate Level


Analog psoc blocks

Analog PSoC Blocks

  • Twelve Analog PSoC Blocks Available

  • Three Types:

    • Continuous Time (4)

    • Switch Capacitor C (4)

    • Switch Capacitor D (4)

Continuous Time

Switched Capacitor D

Switched Capacitor C


User modules

User Modules

  • Pre-configured and Pre-characterized Digital

  • and Analog PSoC Blocks

  • Analogous to On-chip Peripherals

    • Timer- Counters – PWM’s

    • UART – SPI

    • A/D –DAC’s - SAR

  • Defines the Register Bits for Initial Configuration

  • Selected via Double Click in IDE

  • User Modules Include

    • Application Programmer Interfaces (APIs)

    • Interrupt Service Routines (ISRs)

    • Specific UM Data Sheets


Digital user modules

Digital User Modules

  • 8, 16, 24, 32-bit Timer

  • 8, 16, 24, 32-bit Counter

  • 8, 16-bit PWM

  • 8, 16-bit Dead Band Generator

    • (2 Phase Underlapped Clock)

  • Pseudo Random Source (PRS)

  • Cyclic Redundancy Check (CRC) Generator

  • I2C Master

  • I2C Slave

  • SPI Master

  • SPI Slave

  • Full Duplex UART

  • IrDA receiver and transmitter


Analog user modules

Analog User Modules

  • A/D Converters

    • 8-bit Successive Approximation

    • 8-bit Delta Sigma

    • 11-bit Delta Sigma

    • 12-bit Incremental

    • 7-13 bit Variable Incremental

    • Dual input 7-13 bit Variable Incremental

    • Tri input 7-13 bit Variable Incremental

  • D/A Converters

    • 6, 8, and 9-bit

    • 6 and 8 bit multiplying

  • Filters

    • 2-pole Low-pass filter

    • 2-pole Band-pass filter

  • Amplifiers

    • Programmable Gain Amplifier

    • Instrumentation Amplifier

    • Inverting Amplifier

  • Programmable Threshold Comparator

  • DTMF Dialer


Software user modules

Software User Modules

  • I2C Master

  • EEPROM

  • LCD – Interface for Hitachi HD44780 controller


Cypress psoc

  • 集成开发环境

  • (PSoC Designer)

  • 和开发流程


Integrated development environment

Integrated Development Environment

  • Device Editor

  • Application Editor

  • C Compiler

  • Assembler

  • Librarian

  • Debugger


Psoc design flow

PSoC Design Flow

  • Determine system requirements

  • User Modules

    • Choose User Modules

    • Place User Modules

    • Set global and User Module parameters

  • Define the pin-out/interconnect for the device

  • Generate the application

  • Review generated code

  • Demonstrate working configuration


Requirements implementation

Requirements & Implementation

—— Example ——

Pup

需求:闪动2个LED灯,2Hz,duty cycle分别是40%和20%

PSoC

16-bit PWM

÷ 65535

P2[0]

(1.4Hz)

(94kHz)

(1.5MHz)

24MHz

÷16

÷16

VC1

VC2

16-bit PWM

÷ 65535

P2[1]

(1.4Hz)


Psoc designer device editor selection mode

PSoC Designer Device Editor – Selection Mode

  • Selecting User Modules

    • View Lists of User Modules in catalog

    • View datasheet for each user module

    • Select user modules and include in current project

    • View a running total of available and consumed resources

选择的功能模块

可用的硬件资源

功能框图

该功能模块的手册


Psoc designer device editor combined place pinout view

PSoC DesignerDevice Editor – Combined Place & Pinout View

  • Placing User Modules

    • View Block architecture with combined UM & port views

    • Generates routed block to block schematic

    • Routed global I/O connection schematic

    • Step through potential UM placement options

    • Select desired placement option for UM

    • Select UM and resource interconnections

    • Select/configure UM and global device resources

    • Define clocking for UMs


Configure global resources

Configure Global Resources

CPU_Clock: 24MHz

32K_Select: Internal

PLL_MODE: Disable

VC1 = SysClk/N: N=16

……


Configure user modules

Configure User Modules

  • PWM16_1: We want to generate a 1/5 duty cycle

    • Set Clock to VC2 (94kHz)

    • Set Enable

    • Set Period to 65535 (1.4Hz)

    • Set PulseWidth to 13107

    • ……


Interconnect blocks to resources

Interconnect Blocks to Resources

  • Route PWM16_1 to pin:

    • Connect PWM16_1 output to Row_0_Output_0

    • Connect Row_0_Output_0 to GlobalOutEven_0

Left Click

Left Click


Define the pin out

Define the Pin-out

Route PWM16_2 output to pin


Cypress psoc

Pin layout:


Time to create application code

Time to Create Application Code

按下这个按钮

生成这些代码

所有的API和ISR都可修改

对比WinCE的生成(Platform Builder)和Linux的生成(make menuconfig):

PSoC  配置/控制硬件的代码

WinCE/Linux  纯软件(OS)


Psoc designer application editor

PSoC DesignerApplication Editor

  • For Users to Write Code

  • For Users to Assemble/Compile Code

  • View and edit individual source files

  • Set and remove bookmarks (Editing tool)

  • Assemble/compile individual files

  • Build entire project including assemble/compile* all files in project

  • Source line error pointer

*The C compiler needs to be enabled for use.


Build debug

Build & Debug


Psoc designer c compiler

PSoC Designer C Compiler

  • The CY3202-C compiler.

  • Features Include:

    • ANSI C Compiler

    • Supports Inline Assembly and can Interface with Assembly Modules

    • Integrated code compressor

    • Modern Stack-Based Architecture

    • 7 Basic Data Types Including IEEE 32-Bit Floating Point

    • Assembler and Linker

    • Math and String Libraries

    • C Interrupt Service Routines

    • Librarian

  • C Interrupts are Supported

  • #pragma interrupt_handler <name> *


  • Cypress psoc

    • 回顾 & 展望


    Cypress psoc

    回顾

    • PSoC硬件组成

    • M8C 8位CPU

    • 数字阵列

    • 模拟阵列

    • 其他外围

    • 设计方法

    • 在PSoC Designer中选择并配置用户功能模块

    • 设置互联和引脚

    • 系统生成

    • 用C或汇编编写其他代码


    Cypress psoc

    思想的魅力

    • 组成方式——功能级可配置的数字/模拟阵列

    • 以数值计算的方式去解决模拟世界中的问题

    • PSoC同时拥有数/模阵列,单片就可以构成一个系统

      • MCU也有模拟部分,但其功能固定,不使用时成为摆设。PSoC总有一种功能会让你用到,利用率高,因而价格低。

    • 动态可变的系统构成

    • 硬件适应任务:任务不同,则硬件也不同。

    • 设计方法

    • 在同一环境内同时完成硬件和软件的开发

    • 并自动生成相关代码


    Cypress psoc

    嵌入式系统展望

    • 廉价

    • 将更多的数/模功能集成到单片上,如PSoC

    • 要仔细权衡好成本与功能的矛盾

    • 高性能

    • 成本已不太重要,可以接受多片系统的价格

    • 多片,因此数字/模拟电路可独立发展

    • 如DSP、高速运放、高精度ADC

    • 二者的折衷——现在是一个空白

    • PSoC 8位机,性能太弱,应用受限

    • 能否再设计出一种16/32位的类PSoC系统?应用将会更加广泛。


    Cypress psoc

    • 谢谢!

    • 详情参考Cypress网站的On-line Training


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