Imagecraft c compiler and development environment for the atmel avr

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ICCV8 for AVR – C Compiler for Atmel AVRBuild Options - CompilerStrict Checking - ANSI C evolves from the original K&R C. While the ANSI Cstandard is a much tighter language than K&R C with more strict type checking,etc., it still allows certain operations that are potentially unsafe. If selected, thecompiler warns about declarations and casts of function types without prototypes,assignments between pointers to integers and pointers to enums, andconversions from pointers to smaller integral types. It also warns aboutunrecognized control lines, non-ANSI language extensions and source charactersin literals, unreferenced variables and static functions, and declaring arrays ofincomplete types.This option should normally be ON and all warnings should be studied to ensurethat they are acceptable.ANSI C Portability Conformance Checking - If selected, the compiler warnswhen your program exceeds some ANSI environmental limits, such as more than257 cases in switch statements, or more than 512 nesting levels, etc. This doesnot affect the operation of your program under our compilers, but may causeproblems with other ANSI C compilers.Treat const as __flash - For backward compatibility, interpret the constqualifier to refer to program memory, along with __flash.Accept Extensions - If selected, the compiler accepts the following extensions: C++ style comments, which treat everything up to the newline after the characterpair // as comments. support for binary constants (such as 0b10101). C++ style anonymous union and struct; e.g., you can writestruct {struct {int a;int b;};union {int c;int d;} x;and reference x.a, x.b, x.c and x.d58
ICCV8 for AVR – C Compiler for Atmel AVRMacro Define(s) - When you define macros, separate them by spaces orsemicolons. Each macro definition is in the formname[:value] or name[=value]For example:DEBUG=1;PRINT=printfdefines two macros, DEBUG and PRINT. DEBUG has the value 1 by default andPRINT is defined as printf. This is equivalent to writing#define DEBUG 1#define PRINT printfin the source code. A common usage is to use conditional preprocessor directivesto include or exclude certain code fragments.The C Preprocessor predefines a number of macros. See Predefined Macros.Macro Undefine(s) - same syntax as Macro Define(s) but with the oppositemeaning.Enable MISRA / Lint Checks - See MISRA / Lint Code Checking for explanationsof MISRA checks. Available in the ADVANCE and PROFESSIONAL versionsonly.Enable Cross Module Type Checking - detect inconsistence in the definitionsand declarations of global functions and data variables. Available in thePROFESSIONAL version only.Since the compiler encourages the use of function prototyping, this check is mostuseful for detecting accidental misdeclarations of global variables, which cancause your program to fail.Output File Format - select the choice of the output format. Usually a deviceprogrammer requires simple Intel HEX or Motorola S19 format files. If you wantsymbolic debugging, select one of the choices that include the debugging output.For example, the AVR Studio understands COFF output formatEnable 64-bit “double” - enabled for the PROFESSIONAL version. Specify thesize of the double data type as 64 bits. See Data Type Sizes. Note that this issignificantly slower and requires larger code space than 32-bit float.Optimizations - control the levels and types of optimizations. Currently, thechoices areEnable Code Compression - enabled for the ADVANCED and PROFES-SIONAL version. This invokes the Code Compressor (tm) optimizer to elimi-59
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TOOL REFERENCESMISRA / Lint Code Ch
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Imagecraft c compiler and development environment for the atmel avr

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