keil的安裝目錄中有例程，可以直接拿來用。并且keil的幫助文件有很詳細的說明和更適合實際工程的。- /*------------------------------------------------------------------------------
- HELLO.C
- Copyright 1995-2005 Keil Software, Inc.
- ------------------------------------------------------------------------------*/
- #include <REG52.H> /* special function register declarations */
- /* for the intended 8051 derivative */
- #include <stdio.h> /* prototype declarations for I/O functions */
- #ifdef MONITOR51 /* Debugging with Monitor-51 needs */
- char code reserve [3] _at_ 0x23; /* space for serial interrupt if */
- #endif /* Stop Exection with Serial Intr. */
- /* is enabled */
- /*------------------------------------------------
- The main C function. Program execution starts
- here after stack initialization.
- ------------------------------------------------*/
- void main (void) {
- /*------------------------------------------------
- Setup the serial port for 1200 baud at 16MHz.
- ------------------------------------------------*/
- #ifndef MONITOR51
- SCON = 0x50; /* SCON: mode 1, 8-bit UART, enable rcvr */
- TMOD |= 0x20; /* TMOD: timer 1, mode 2, 8-bit reload */
- TH1 = 221; /* TH1: reload value for 1200 baud @ 16MHz */
- TR1 = 1; /* TR1: timer 1 run */
- TI = 1; /* TI: set TI to send first char of UART */
- #endif
- /*------------------------------------------------
- Note that an embedded program never exits (because
- there is no operating system to return to). It
- must loop and execute forever.
- ------------------------------------------------*/
- while (1) {
- P1 ^= 0x01; /* Toggle P1.0 each time we print */
- printf ("Hello World\n"); /* Print "Hello World" */
- }
- }
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