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Announcements . Feb 14 - ESPN will be recruiting via video conference. A typical “hardware” standard. How do computers control the world?. Each joint is a motor that can be turned on and off with a switch. 7 switches to control a whole robot. A Computer “port”.

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Presentation Transcript
announcements
Announcements
  • Feb 14 - ESPN will be recruiting via video conference
a computer port
A Computer “port”
  • Connects 1 byte of memory to outside world
a printer port
A printer “Port”
  • Computer connects an internal byte variable to the printer switches, and changes the values to tell the printer what to print
slide8

Address

Data

Memory

r/w

slide9

I/0 Memory

Data Memory

Program Memory

Fast Specialty Memory

slide10

Memory mapped I/O

8-bit

Your Program

Driver

Port

A Decimal

Variable

A Binary

Value

A function

call

an example program
an example program

Private Sub Write_Port(value As Integer)

txtByteOut.Text = (value) \'decimal

Status = cbUSBDOut(DeviceNum, RELAY_PORT, value)

If value < 16 Then

txtHexOut.Text = "0" & (Hex(value))

Else

txtHexOut.Text = (Hex(value))

End If \' hex

txtBinary.Text = CBin(value) \'binary

End Sub

slide16

Computer

“dirty” Environment

slide20

Computer

Environment

buying parts
buying parts

http://www.sparkfun.com

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