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

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16-Bit C Compiler User’s Guide COFF Common Object File Format. An object file of this format contains machine code, debugging and other information. Command Line Interface A means of communication between a program and its user based solely on textual input and output. Data Memory On Microchip MCU and DSC devices, data memory (RAM) is comprised of General Purpose Registers (GPRs) and Special Function Registers (SFRs). Some devices also have EEPROM data memory. Device Programmer A tool used to program electrically programmable semiconductor devices, such as microcontrollers. Digital Signal Controller A microcontroller device with digital signal processing capability, (i.e., Microchip dsPIC DSC devices). Digital Signal Processing The computer manipulation of digital signals, commonly analog signals (sound or image) which have been converted to digital form (sampled). Digital Signal Processor A microprocessor that is designed for use in digital signal processing. Directives Statements in source code that provide control of the language tool’s operation. DSC See Digital Signal Controller. DSP See Digital Signal Processor. Endianess Describes order of bytes in a multi-byte object. Epilogue A portion of compiler-generated code that is responsible for deallocating stack space, restoring registers and performing any other machine-specific requirement specified in the run-time model. This code executes after any user code for a given function, immediately prior to the function return. Errors Errors report problems that make it impossible to continue processing your program. When possible, errors identify the source file name and line number where the problem is apparent. Executable Code Software that is ready to be loaded for execution. Expressions Combinations of constants and/or symbols separated by arithmetic or logical operators. DS51284H-page 222 © 2008 Microchip Technology Inc.
Glossary File Registers On-chip data memory, including General Purpose Registers (GPRs) and Special Function Registers (SFRs). Frame Pointer A pointer that references the location on the stack that separates the stack-based arguments from the stack-based local variables. Provides a convenient base from which to access local variables and other values for the current function. Free-Standing A C compiler implementation that accepts any strictly conforming program that does not use complex types and in which the use of the features specified in the ISO library clause is confined to the contents of the standard headers , , , and . GPR General Purpose Register. The portion of device data memory (RAM) available for general use. Heap An area of memory used for dynamic memory allocation where blocks of memory are allocated and freed in an arbitrary order determined at run time. Hex Code Executable instructions stored in a hexadecimal format code. Hex code is contained in a hex file. Hex File An ASCII file containing hexadecimal addresses and values (hex code) suitable for programming a device. High Level Language A language for writing programs that is further removed from the processor than assembly. IDE Integrated Development Environment. MPLAB IDE is Microchip’s integrated development environment. Identifier A function or variable name. IEEE Institute of Electrical and Electronics Engineers. Initialized Data Data which is defined with an initial value. In C, int myVar=5; defines a variable which will reside in an initialized data section. Instruction Set The collection of machine language instructions that a particular processor understands. Instructions A sequence of bits that tells a Central Processing Unit (CPU) to perform a particular operation and can contain data to be used in the operation. © 2008 Microchip Technology Inc. DS51284H-page 223
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MPLAB ® C COMPILER FOR PIC24 MCUs
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Table of Contents A.5 Identifiers .
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INTRODUCTION MPLAB ® C COMPILER FO
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CONVENTIONS USED IN THIS GUIDE The
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THE MICROCHIP WEB SITE Preface C Re
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1.1 INTRODUCTION 1.2 HIGHLIGHTS MPL
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1.5 COMPILER FEATURE SET Compiler O
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Differences Between 16-Bit Device C
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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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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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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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MPLAB C Compiler for PIC24 MCUs and dsPIC DSCs ... - Microchip

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