 C166 User's Guide | |
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C166 User's Guide
C166 Introduction Compiling Programs Language Extensions Preprocessor Advanced Programming Sections, Classes, and Groups
Special Sections Locating Sections Customization Files Startup Code STARTUP.A66 START167.A66 Basic I/O Memory Allocation TRAPS.C Optimizer Optimizer Options General Optimizations 80C166-Specific Optimizations Global Register Coloring DPP Registers Stacks System Stack User Stack Stack Sizes System Stack Size User Stack Size XBUS Memory and Peripherals On-chip XRAM XBUS Peripherals Interfacing C to Assembler Function Parameters Function Return Values Using the SRC Directive Register Usage Example Routines TINY Model SMALL Model COMPACT Model MEDIUM Model LARGE Model Data Storage Formats Bit Variables 1-byte Scalars 2-byte Scalars 4-byte Scalars float Scalars float Errors double Scalars double Errors near Pointers far Pointers huge Pointers xhuge Pointers Absolute Memory Access Absolute Access Macros Linker Location Controls Debugging Error Messages Library Reference AppendixCustomization Files
The C166 Compiler provides a number of source files you may modify to adapt your target program to a specific hardware platform. These files contain:
- Code that executes upon reset
(STARTUP.A66, START167.A66, and START_V2.A66). - Code that performs low-level stream I/O.
- Code for memory allocation.
The code contained in these files is already compiled or assembled and included in the C library. When you link your program, the code from the library is automatically included.
You may customize these files to adjust them to your requirements. If you use the µVision IDE, we recommend that you copy the customization file into your project folder to make modifications. The modified version of the file may be added to your project.
When you use the command-line tools, you must include the object files generated from the modified customization files on the linker command line. The following example shows you how to include custom replacement files for STARTUP.A66 and PUTCHAR.C:
L166 MYMODUL1.OBJ, MYMODUL2.OBJ, STARTUP.OBJ, PUTCHAR.OBJ
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