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Cx51 User's Guide
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Startup Code
Variable Initialization Code
XBANKING.A51
Basic I/O
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Interfacing C to Assembler
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Using the SRC Directive
Register Usage
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Small Model Example
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Interfacing C programs to PL/M-51
Data Storage Formats
Bit Variables
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The _at_ Keyword
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Library Reference
Appendix
Basic 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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