Embeded system session 6

8/12/2019 Embeded system session 6

http://slidepdf.com/reader/full/embeded-system-session-6 1/29

By Fateen Mubarak EMBEDDED SYSTEMS DESIGN (EE 4314) 1

Embedded Systems Design

(EE-4314)

Fateen MubarakLecture # 113rd October 2013




Class Quiz (Solution)

Time 15 mins

• Calculate total time required to transmit 10bytes of data over serial protocol @115200 rate and two stop bits with noparity

• Calculate total time required to transmit 8words of data over serial protocol @ 2400rate with parity

• Number of ‘a’ is >= 2 && number of ‘m’ is >= 1:

• Number of ‘a’ is = 2 && number of ‘m’ is = 2:

• Marks 5




Raspberry Pi




History of Raspberry Pi

• Eben Christopher Upton: – PhD in Computer Engineering

– Technical Director Broadcom

– Executive director Pi Foundation

– Designer of Raspberry Pi

– World's Top Young Innovators for

2012

• Raspberry Pi designs: – 2006

















– World's Top Young Innovators for

2012

• Raspberry Pi designs: – 2006

– August 2011 (Raspberry Pi α)

– December 2011




Raspberry Pi Model A









• Raspberry Pi designs:

– 2006

– August 2011 (Raspberry Pi α) – December 2011

– 2012 Final version







PCB Internal Routing




Raspberry Pi Model A versus Model B

TECHNICAL FEATURES

Raspberry Pi Model A Raspberry Pi Model B

Chip Broadcom BCM2835 SoC full HD multimedia

applications processor

Broadcom BCM2835 SoC full HD multimedia

applications processor

CPU 700 MHz Low Power ARM1176JZ-F Applications

Processor

700 MHz Low Power ARM1176JZ-F Applications

Processor

GPU Dual Core VideoCore IV® Multimedia Co-Processor

Dual Core VideoCore IV® Multimedia Co-Processor

Memory 256MB SDRAM 512MB SDRAM

Ethernet None onboard 10/100 Ethernet RJ45 jack

USB 2.0 Single USB Connector Dual USB Connector

Video Output HDMI Composite RCA (PAL and NTSC) HDMI Composite RCA (PAL and NTSC)

Audio Output 3.5mm jack, HDMI 3.5mm jack, HDMI

Ethernet/Internet No Yes

Onboard Storage SD, MMC, SDIO card slot SD, MMC, SDIO card slot

Operating System Linux Linux

Dimensions 8.6cm x 5.4cm x 1.5cm 8.6cm x 5.4cm x 1.7cm

http://www.broadcom.com/videocore?CMP=modela-vs-modelb-doc







Raspberry Pi Architecture

•On Board it has: – CORE:

• ARM11 700 MHz Processor Chip

• 512 MB of Memory

– Interfaces:

•SDI Card Interface

• DSI Display (Display Serial Interface Standard)

• CSI Interface (Camera Serial Interface)

• Some GPIOs

• USB 2.0

• Ethernet

– Display Interface:

• HDMI output

• Composite (RCA Video Out)

– Audio Out










The BCM-2835 Broadcom Chip




The BCM-2835 Broadcom Chip•

SoC (System on Chip)• This is a multimedia processor designed for mobile application andhas following on chip Cores/peripherals – ARM 11 Processor Core

– OpneGL Video Core GPU• Video Encoder Decore

• H.264 Encoder/Decoder

• Graphic Accelerator

– Audio Interface

– LCD Interface

– Camera Interface

– On Chip Peripherals:• USB

• SPI

• GPIO

• I2C

• UART

• SD Card Interface




ARM OS Support

• Microsoft – Windows XP Embedded

– Windows CE

• Google – Google's Android 2.3 OS

• Linux

– Fedora, Debian, Ubuntu

• Android

• webOS




Understanding the Board

• On Board LED – There are 5 status LED's on the Raspberry Pi board

namely:

– OK, PWR, FDX, LNK and 10M.

– FDX, LNK, 10M are connected to the LAN IC

– D5(Green) - OK - SDCard Access

– D6(Red) - PWR - 3.3 V Power

– D7(Green) - FDX - Full Duplex (LAN) (Model B) – D8(Green) - LNK - Link/Activity (LAN) (Model B)

– D9(Yellow) - 10M - 10/100Mbit (LAN) (Model B)




Setup Requirement for Pi




Pi Setup




Reading Material

• Please read the following article (MUST)

– http://www.embedded.com/design/other/4395

443/How-FPGAs--multicore-CPUs--and-

graphical-programming-are-changing-embedded-design

http://www.embedded.com/design/other/4395443/How-FPGAs--multicore-CPUs--and-graphical-programming-are-changing-embedded-design





























LCD Controllers

• LCD (Liquid Crystal Display)is a low cost, low power

device capable of displaying

text and images

• Why LCD is extremelycommon in Embedded

Systems

• Display information

– Debug

– Status

– INPUT/OUTPUT




LCD ControllersFeatures• Low Power

– 3.3 v to 5 v

• Easy Interface – 8 bit interface with MCU

– 4 bit interface with MCU

• Different Display configurations• Programmable RAM

– For Special characters

– For Chinese characters

• Pin Compatibility

• Back Light

• Wide Range of Instructions – Display clear, cursor home, display on/off, cursor on/off, display

character blink, cursor shift, display shift




LCD Controllers

• RS – MPU Selects registers.

– 0: Instruction register (for write)

– 1: Data register (for write and

read)

• R/W

– MPU Selects read or write.

– 0: Write

– 1: Read

• E

– MPU Starts data read/write.

Microcontroller

D0-D7

E

RS

R/W’

LCD




LCD Controllers

Write Operation




LCD Controllers

Read Operation



Documents

Embeded system session 6