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

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16-Bit C Compiler User’s Guide concatenation of string literals with __FUNCTION__ is deprecated __FUNCTION__ will be handled the same way as __func__ (which is defined by the ISO standard C99). __func__ is a variable, not a string literal, so it does not catenate with other string literals. conflicting types for ‘identifier’ The specified identifier has multiple, inconsistent declarations. D data definition has no type or storage class A data definition was detected that lacked a type and storage class. data qualifier ‘qualifier’ ignored Data qualifiers, which include ‘access’, ‘shared’ and ‘overlay’, are not used in the compiler, but are there for compatibility with the MPLAB C Compiler for PIC18 MCUs. declaration of ‘identifier’ has ‘extern’ and is initialized Externs should not be initialized. declaration of ‘identifier’ shadows a parameter The specified identifier declaration shadows a parameter, making the parameter inaccessible. declaration of ‘identifier’ shadows a symbol from the parameter list The specified identifier declaration shadows a symbol from the parameter list, making the symbol inaccessible. declaration of ‘identifier’ shadows global declaration The specified identifier declaration shadows a global declaration, making the global inaccessible. ‘identifier’ declared inline after being called The specified function was declared inline after it was called. ‘identifier’ declared inline after its definition The specified function was declared inline after it was defined. ‘identifier’ declared ‘static’ but never defined The specified function was declared static, but was never defined. decrement of read-only member ‘name’ The member ‘name’ was declared as const and cannot be modified by decrementing. decrement of read-only variable ‘name’ ‘name’ was declared as const and cannot be modified by decrementing. ‘identifier’ defined but not used The specified function was defined, but was never used. deprecated use of label at end of compound statement A label should not be at the end of a statement. It should be followed by a statement. dereferencing ‘void *’ pointer It is not correct to dereference a ‘void *’ pointer. Cast it to a pointer of the appropriate type before dereferencing the pointer. division by zero Compile-time division by zero has been detected. DS51284H-page 186 © 2008 Microchip Technology Inc.
duplicate ‘const’ The ‘const’ qualifier should be applied to a declaration only once. duplicate ‘restrict’ The ‘restrict’ qualifier should be applied to a declaration only once. duplicate ‘volatile’ The ‘volatile’ qualifier should be applied to a declaration only once. E Diagnostics embedded ‘\0’ in format When checking the argument list of a call to printf, scanf, etc., the compiler found that the format string contains an embedded ‘\0’ (zero), which can cause early termination of format string processing. empty body in an else-statement An else statement is empty. empty body in an if-statement An if statement is empty. empty declaration The declaration contains no names to declare. empty range specified The range of values in a case range is empty, that is, the value of the low expression is greater than the value of the high expression. Recall that the syntax for case ranges is case low ... high:. ‘enum identifier’ declared inside parameter list The specified enum is declared inside a function parameter list. It is usually better programming practice to declare enums outside parameter lists, since they can never become complete types when defined inside parameter lists. enum defined inside parms An enum is defined inside a function parameter list. enumeration value ‘identifier’ not handled in switch The controlling expression of a switch statement is an enumeration type, yet not all enumeration values have case expressions. enumeration values exceed range of largest integer Enumeration values are represented as integers. The compiler detected that an enumeration range cannot be represented in any of the compiler integer formats, including the largest such format. excess elements in array initializer There are more elements in the initializer list than the array was declared with. excess elements in scalar initializer"); There should be only one initializer for a scalar variable. excess elements in struct initializer There are more elements in the initializer list than the structure was declared with. excess elements in union initializer There are more elements in the initializer list than the union was declared with. © 2008 Microchip Technology Inc. DS51284H-page 187
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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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Page 143 and 144: A.17 SIGNALS A.18 STREAMS AND FILES
Page 145 and 146: A.24 GETENV A.25 SYSTEM A.26 STRERR
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Page 149 and 150: __builtin_btg Built-in Functions De
Page 151 and 152: __builtin_clr_prefetch Argument: xp
Page 153 and 154: __builtin_dmaoffset Built-in Functi
Page 155 and 156: __builtin_fbcl Built-in Functions A
Page 157 and 158: __builtin_modsd Argument: dividend
Page 159 and 160: __builtin_mpy Error Messages An err
Page 161 and 162: __builtin_mulss Built-in Functions
Page 163 and 164: __builtin_psvoffset Built-in Functi
Page 165 and 166: __builtin_subab Built-in Functions
Page 167 and 168: __builtin_tblwth Built-in Functions
Page 169 and 170: C.1 INTRODUCTION C.2 ERRORS MPLAB
Page 171 and 172: Diagnostics ambiguous abbreviation
Page 173 and 174: Diagnostics cast specifies function
Page 175 and 176: F Diagnostics ‘identifier’ fail
Page 177 and 178: Diagnostics initializer for static
Page 179 and 180: Diagnostics invalid use of undefine
Page 181 and 182: N Diagnostics negative width in bit
Page 183 and 184: R Diagnostics redeclaration of ‘i
Page 185 and 186: Diagnostics symbol ‘symbol’ not
Page 187 and 188: Diagnostics void expression between
Page 189 and 190: Diagnostics anonymous union declare
Page 191: Diagnostics comparison between sign
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Page 199 and 200: Diagnostics library function ‘ide
Page 201 and 202: P Diagnostics parameter has incompl
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Page 207 and 208: V Diagnostics __VA_ARGS__ can only
Page 209 and 210: MPLAB ® C COMPILER FOR PIC24 MCUs
Page 211 and 212: MPLAB C Compiler for PIC18 MCUs vs.
Page 217 and 218: E.1 INTRODUCTION E.2 HIGHLIGHTS MPL
Page 221 and 222: G.1 PREAMBLE MPLAB ® C COMPILER FO
Page 223 and 224: G.3 VERBATIM COPYING G.4 COPYING IN
Page 225 and 226: GNU Free Documentation License incl
Page 229 and 230: Glossary File Registers On-chip dat
Page 231 and 232: Glossary Machine Language A set of
Page 233 and 234: Glossary Stack, Software Memory use
Page 235 and 236: Symbols __builtin_add..............
Page 237 and 238: -fpack-struct .....................
Page 239 and 240: -idirafter.........................
Page 241 and 242: Peephole Optimization..............
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-Wsequence-point...................
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