30 oct 2006 · Motorola 68HC11 E1,E9 operating at 2 MHz E-clock 68HC11 EVBU Simulator Version 0 6 PySim11 Version 3 4 Sample Source Code
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Inherent addressing always deals with data or operands stored in registers not in memory Examples: Address Code Mnemonic Instruction Actions 0100 4F CLRA
gram examples distributed with the Motorola 68HC11 Reference Manual; any of the code examples stored on the anonymous ftp sites (see Section H) or
code In the back of the Motorola 68HC11 programmer's handbook is a table of the operations are often placed back into a register; for example, an instruction
Source Code, Object Code, and the Assembler C 68HC11 Instruction Set Example ○ Add the following numbers: ○ 68HC11 can add 2 bytes or 2 double
30 oct 2006 · Motorola 68HC11 E1,E9 operating at 2 MHz E-clock 68HC11 EVBU Simulator Version 0 6 PySim11 Version 3 4 Sample Source Code
Programming Model for the an example microprocessors (the See examples on web: μP Binary(Hex) Machine Codes 68HC11: $86 $0A G-CPU: $02 $0A
68HC11 most widely used • Used in C 8-bit condition code register Stores Example: LDAA $64 loads contents of memory address $0064 into AccA AccA
The AX-11 68HC11 Microcontroller Activity board is developed based-on User code will be stored in memory with back up circuit 2 5 1 A Quick C Tutorial
computer languages and provides some samples of how the code might read High-level languages are designed to be more removed from machine code and
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68HC11 Notes Version 1.1.1 Oct 30, 2006 Andrew J. Blauch School of Engineering 68HC11 Notes i DISCLAIMER: All software is provided "as is" and without any express or implied warranties, including, without limitation, the implied warranties of merchantability and fitness for a particular purpose.
COMPATABILITY: This software has been created and tested using the following development systems:
Compiler(s): GCC 68HC11 compiler version 2.2 Processor(s): Motorola 68HC11 E1,E9 operating at 2 MHz E-clock Evaluation Board(s): Axiom Manufacturing CMM11E1-EVBU Axiom Manufacturing CME11E9-EVBU Simulators(s): 68HC11 EVBU Simulator Version 0.6. PySim11 Version 0.5 (developed by Andrew Sterian)
Copyright © 2005 School of Engineering Grand Valley State University 68HC11 Notes ii Table of Contents 1 HC11 Microcontroller.................................................................................................1 1.1 Overview.............................................................................................................1 1.2 Memory Maps.....................................................................................................1 2 Communication between PC and EVBU....................................................................6 2.1 Overview.............................................................................................................6 2.2 Block Diagram ....................................................................................................7 3 Gcc 68HC11 Compiler................................................................................................8 3.1 Overview.............................................................................................................8 3.2 Library Functions................................................................................................8 3.3 BUFFALO Library Functions.............................................................................8 3.4 Sample Source Code...........................................................................................8 4 I/O Registers................................................................................................................9 4.1 Overview.............................................................................................................9 4.2 Memory Mapped I/O Register............................................................................9 5 Parallel I/O................................................................................................................11 5.1 Overview...........................................................................................................11 5.2 Output Ports.......................................................................................................11 5.3 Input Ports.........................................................................................................11 5.4 Bi-directional Ports ...........................................................................................12 6 I/O Register C Definitions.........................................................................................13 6.1 Overview...........................................................................................................13 6.2 Register Defines................................................................................................13 6.3 Register Usage...................................................................................................13 6.4 Bit Defines.........................................................................................................14 6.5 Bit Usage...........................................................................................................14 7 Clocks and Counters..................................................................................................15 7.1 Overview...........................................................................................................15 7.2 Clocks................................................................................................................15 7.3 Free Running Clock and Counter......................................................................16 7.3.1 Overview...................................................................................................16 7.3.2 Sample Source Code.................................................................................17 7.4 Real-Time Interrupt Clock................................................................................18 7.5 Software Timing Measurements .......................................................................19 7.5.1 Example - Measuring a Pulse Width........................................................20 7.5.2 Example - Generating a Pulse Width .......................................................22 8 Events and Flags........................................................................................................24 8.1 Overview...........................................................................................................24 8.2 Polling Technique .............................................................................................25 8.2.1 Overview...................................................................................................25 8.2.2 Sample Source Code.................................................................................25 8.3 Interrupt Technique...........................................................................................26 8.3.1 Overview...................................................................................................26 8.3.2 Sample Source Code.................................................................................26 68HC11 Notes iii 8.3.3 Terminology..............................................................................................27 8.3.4 Sequence of Operation..............................................................................29 9 Timer Overflow.........................................................................................................30 9.1 Overview...........................................................................................................30 9.2 Sample Source Code.........................................................................................30 10 Real-Time Interrupt...............................................................................................31 10.1 Overview...........................................................................................................31 10.2 Sample Source Code.........................................................................................31 11 Output Compares...................................................................................................32 11.1 Overview...........................................................................................................32 11.2 Output Compare 1.............................................................................................33 11.3 Output Compares 2...5......................................................................................33 11.4 Examples...........................................................................................................34 11.4.1 Generating a Pulse Width (Output Compare 1)........................................34 11.4.2 Generating a Pulse Width (Output Compare 2)........................................35 11.4.3 Generating a Pulse Width (Output Compare 1 and 2) ..............................36 11.4.4 Generating a PWM Signal (Output Compare 1 and 2).............................37 12 Input Captures.......................................................................................................38 12.1 Overview...........................................................................................................38 12.2 Example - Measuring a Pulse Width................................................................39 13 Analog-to-Digital Conversion...............................................................................40 13.1 Overview...........................................................................................................40 13.2 Configuration ....................................................................................................41 14 Serial Communication Interface (SCI)..................................................................42 14.1 Overview...........................................................................................................42 14.2 Baud Rate..........................................................................................................43 quotesdbs_dbs2.pdfusesText_2
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