MPLAB C Compiler for PIC24 MCUs and dsPIC DSCs ... - Microchip

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16-Bit C Compiler User’s Guide RECOMMENDED READING This documentation describes how to use the MPLAB C Compiler for PIC24 MCUs and dsPIC DSCs. Other useful documents are listed below. The following Microchip documents are available and recommended as supplemental reference resources. Readme Files For the latest information on Microchip tools, read the associated Readme files (HTML files) included with the software. 16-Bit Language Tools Getting Started (DS70094) A guide to installing and working with the Microchip language tools for 16-bit devices. Examples using the 16-bit simulator SIM30 (a component of MPLAB SIM) are provided. MPLAB ® Assembler, Linker and Utilities for PIC24 MCUs and dsPIC ® DSCs User’s Guide (DS51317) A guide to using the 16-bit assembler, object linker, object archiver/librarian and various utilities. 16-Bit Language Tools Libraries (DS51456) A descriptive listing of libraries available for Microchip 16-bit devices. This includes standard (including math) libraries and C compiler built-in functions. DSP and 16-bit peripheral libraries are described in Readme files provided with each peripheral library type. Device-Specific Documentation The Microchip website contains many documents that describe 16-bit device functions and features. Among these are: • Individual and family data sheets • Family reference manuals • Programmer’s reference manuals C Standards Information American National Standard for Information Systems – Programming Language – C. American National Standards Institute (ANSI), 11 West 42nd. Street, New York, New York, 10036. This standard specifies the form and establishes the interpretation of programs expressed in the programming language C. Its purpose is to promote portability, reliability, maintainability and efficient execution of C language programs on a variety of computing systems. DS51284H-page 4 © 2008 Microchip Technology Inc.
THE MICROCHIP WEB SITE Preface C Reference Manuals Harbison, Samuel P. and Steele, Guy L., C A Reference Manual, Fourth Edition, Prentice-Hall, Englewood Cliffs, N.J. 07632. Kernighan, Brian W. and Ritchie, Dennis M., The C Programming Language, Second Edition. Prentice Hall, Englewood Cliffs, N.J. 07632. Kochan, Steven G., Programming In ANSI C, Revised Edition. Hayden Books, Indianapolis, Indiana 46268. Plauger, P.J., The Standard C Library, Prentice-Hall, Englewood Cliffs, N.J. 07632. Van Sickle, Ted., Programming Microcontrollers in C, First Edition. LLH Technology Publishing, Eagle Rock, Virginia 24085. Microchip provides online support via our web site at www.microchip.com. This web site is used as a means to make files and information easily available to customers. Accessible by using your favorite Internet browser, the web site contains the following information: • Product Support – Data sheets and errata, application notes and sample programs, design resources, user’s guides and hardware support documents, latest software releases and archived software • General Technical Support – Frequently Asked Questions (FAQs), technical support requests, online discussion groups, Microchip consultant program member listing • Business of Microchip – Product selector and ordering guides, latest Microchip press releases, listing of seminars and events, listings of Microchip sales offices, distributors and factory representatives © 2008 Microchip Technology Inc. DS51284H-page 5
Page 1 and 2: MPLAB ® C COMPILER FOR PIC24 MCUs
Page 5 and 6: Table of Contents A.5 Identifiers .
Page 7 and 8: INTRODUCTION MPLAB ® C COMPILER FO
Page 9: CONVENTIONS USED IN THIS GUIDE The
Page 13 and 14: 1.1 INTRODUCTION 1.2 HIGHLIGHTS MPL
Page 15 and 16: 1.5 COMPILER FEATURE SET Compiler O
Page 19 and 20: Differences Between 16-Bit Device C
Page 41 and 42: Using the Compiler on the Command L
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Using the Compiler on the Command L
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3.6 ENVIRONMENT VARIABLES Using the
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4.1 INTRODUCTION 4.2 HIGHLIGHTS 4.3
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4.5 MEMORY SPACES Run Time Environm
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Run Time Environment 1. It is possi
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4.8 SOFTWARE STACK Run Time Environ
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FIGURE 4-2: CALL OR RCALL Stack gro
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4.11 FUNCTION CALL CONVENTIONS Run
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Run Time Environment The compiler a
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4.14.2 String Literals as Arguments
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5.1 INTRODUCTION 5.2 HIGHLIGHTS MPL
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6.1 INTRODUCTION MPLAB ® C COMPILE
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6.3 PMP POINTERS Additional C Point
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6.4 EXTERNAL POINTERS 6.3.3 Define
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ead_external16 Additional C Pointer
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Additional C Pointer Types } else {
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7.5 USING SFRS Device Support Files
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7.6 USING MACROS Device Support Fil
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EXAMPLE 7-2: EEDATA ACCESS VIA PSV
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Interrupts When using the interrupt
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8.4.1 dsPIC30F DSCs (Non-SMPS) Inte
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8.4.3 PIC24F MCUs Interrupt Vectors
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Interrupts TABLE 8-3: INTERRUPT VEC
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Interrupts TABLE 8-4: INTERRUPT VEC
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85 _Interrupt85 _AltInterrupt85 Res
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8.8 ENABLING/DISABLING INTERRUPTS I
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Interrupts 2. Unsafe: read bar inte
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LATGbits.LATG2 = 0; /* No problem l
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MPLAB ® C COMPILER FOR PIC24 MCUs
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Mixing Assembly Language and C Modu
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A.5 IDENTIFIERS A.6 CHARACTERS Impl
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Implementation-Defined Behavior The
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A.15 PREPROCESSING DIRECTIVES Imple
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A.17 SIGNALS A.18 STREAMS AND FILES
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A.24 GETENV A.25 SYSTEM A.26 STRERR
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B.1 INTRODUCTION MPLAB ® C COMPILE
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__builtin_btg Built-in Functions De
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__builtin_clr_prefetch Argument: xp
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__builtin_dmaoffset Built-in Functi
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__builtin_fbcl Built-in Functions A
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__builtin_modsd Argument: dividend
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__builtin_mpy Error Messages An err
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__builtin_mulss Built-in Functions
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__builtin_psvoffset Built-in Functi
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__builtin_subab Built-in Functions
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__builtin_tblwth Built-in Functions
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C.1 INTRODUCTION C.2 ERRORS MPLAB
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Diagnostics ambiguous abbreviation
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Diagnostics cast specifies function
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F Diagnostics ‘identifier’ fail
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Diagnostics initializer for static
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Diagnostics invalid use of undefine
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N Diagnostics negative width in bit
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R Diagnostics redeclaration of ‘i
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Diagnostics symbol ‘symbol’ not
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Diagnostics void expression between
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Diagnostics anonymous union declare
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Diagnostics comparison between sign
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duplicate ‘const’ The ‘const
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Diagnostics function might be possi
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Diagnostics ‘identifier’ is nar
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Diagnostics library function ‘ide
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P Diagnostics parameter has incompl
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Diagnostics shift count >= width of
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Diagnostics too many arguments for
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V Diagnostics __VA_ARGS__ can only
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MPLAB C Compiler for PIC18 MCUs vs.
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E.1 INTRODUCTION E.2 HIGHLIGHTS MPL
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G.1 PREAMBLE MPLAB ® C COMPILER FO
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G.3 VERBATIM COPYING G.4 COPYING IN
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GNU Free Documentation License incl
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Glossary File Registers On-chip dat
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Glossary Machine Language A set of
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Glossary Stack, Software Memory use
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Symbols __builtin_add..............
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-fpack-struct .....................
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-idirafter.........................
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Peephole Optimization..............
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-Wsequence-point...................
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