ECE 567 Microprocessor Lab

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ECE 567Microprocessor Lab

• Instructor Yen-Lun Chen
• chen.1098_at_osu.edu

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Lab Overview

• Lab1
• Introduction, Familiarity with the THRSim11
• Lab2
• Timing (Both Software Hardware), Designing your
  own Dancing Light show
• Lab3
• Analog to Digital Conversion, Designing your own
  Digital Thermometer
• Lab4
• Keypad Interfacing

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Tentative Schedule
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Todays Review

• Hardware Model
• 68HC11 Instruction Set (course website)
• Addressing Modes
• Assembler Directives (ORG, EQU,)

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Programmers Model

• 8-bit processor
• Accumulators (A,B, and D)
• Index Registers (X and Y)
• Stack Pointer (SP)
• Program Counter (PC)
• Condition Code Register (CCR)

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Instruction Set

• Data Movement
• Load, Store, Push, Pull, Clear, Exchange,
  Transfer
• Arithmetic
• Add, Subtract, (Multiply, Divide),
  Increment/Decrement, Compare, Test
• Logical
• AND, OR, Complement, XOR
• Bit Manipulation
• Bit tests, bit set, bit clear

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Instruction Set

• Shift and Rotate
• Arithmetic/Logical shifts and rotates
• Condition Code Register (CCR)
• Set/Clear carry, overflow, get/set CCR
• Branch
• Unconditional (BRA), Conditional (BGT, BEQ, BNE)
• Subroutines
• Branch/Jump to subroutine (BSR/JSR)
• Return (RTS)
• Miscellaneous
• waste 2 cycles (NOP)

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M68HC11Addressing Modes
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M68HC11Addressing Modes
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M68HC11Simple exercise
00
FF
0010
FF
F4
76
0A
0010
0021
000A
5623
76F4
34A1
0010
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M68HC11Assembler Directives

• ORG specifies the address to generate code at.
• END stop assembling. Anything written after
  this is not assembled.
• Others such as FCB, EQU, and FDB will be
  discussed later.

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Lab 1

• Form Groups
• Introduction to THR11Sim Simulation Tool

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Lab 1 (cont)

• ORG 100
• MAIN CLRB
• LDAA 37
• LOOP DECB
• BNE LOOP
• TAB
• COMB
• BK1 BRA LOOP
• END

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Evaluation Board
Figure 2.1
Figure 2.3
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Lab 2 Setup

• Port B (output)
• Writing a 1 turns LEDs OFF / Writing a 0 turns
  LEDs ON
• Port C (input)
• Switch ON reads as 0 / switch OFF reads as 1

5v
5v
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Reminders

• Buy course packet from UniPrint
• Bring money to buy one 567 kit per group
• Bring to Lab
• Breadboard and 567 Kit
• Course packet
• Text (Optional)
• Quiz 1 next week