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CARM User's Guide
CARM Introduction Compiling Programs Language Extensions Preprocessor Advanced Programming Customization Files
Startup Code Basic I/O Memory Allocation Interfacing C to Assembler Function Parameters Function Return Values Using the SRC Directive Register Usage Example Routines ARM Code Example Thumb Code Example Data Storage Formats Byte Order Byte Alignment Integer Scalars 1-Byte Scalars 2-Byte Scalars 4-Byte Scalars 8-Byte Scalars float Scalars float Format float Errors double Scalars double Format double Errors Pointers Bit Fields Absolute Memory Access The __at Keyword Linker Location Controls Error Messages Library Reference AppendixBasic I/O
The following files contain the source code for the low-level stream I/O routines. When you use µVision IDE, you can simply add the modified versions to the project.
| C Source File | Description |
|---|---|
| PUTCHAR.C | Used by all stream routines that output characters. You may adapt this routine to your individual hardware (for example, LCD or LED displays). The default version outputs characters via the serial interface. An XON/XOFF protocol is used for flow control. Line feed characters ('\n') are converted into carriage return/line feed sequences ('\r\n'). |
| GETKEY.C | Used by all stream routines that input characters. You may adapt this routine to your individual hardware (for example, matrix keyboards). The default version reads a character via the serial interface. No data conversions are performed. |
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