一种方便调试的打印语句宏定义

最新推荐文章于 2024-08-08 16:09:31 发布

转载最新推荐文章于 2024-08-08 16:09:31 发布 · 97 阅读

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原文链接：http://www.cnblogs.com/fedorayang/archive/2009/03/20/5094234.html

本文介绍了一个基于8051单片机的C语言程序实例，演示了如何进行串口的初始化设置及基本的串口通信操作。程序中包括了特殊功能寄存器的声明、I/O函数的原型声明等内容，并展示了如何设置串口波特率、工作模式等参数。

/*------------------------------------------------------------------------------
HELLO.C

#include <REG52.H> /* special function register declarations */
/* for the intended 8051 derivative */

#include <stdio.h> /* prototype declarations for I/O functions */
#include <stdlib.h>
#include <string.h>
#include <ABSACC.H>

#define APP_DBG //print my dbg-info

#ifdef APP_DBG
#define dprintf(fmt,param...) do{ /
printf("[%s : %d]/t",__FILE__,__LINE__); /
printf(fmt,##param); /
/*fflush(stdout);*/ /
}while(0)//现在GCC编译器通过,VC、KeilC编译器不能通过
//怎样能写一个在大多数编译器都能通过的宏
#else
#define dprintf(fmt,param...)
#endif

#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) {
char *p_str="init string";
/*------------------------------------------------
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.
------------------------------------------------*/

dprintf("which file : which line/n");

if(NULL!=p_str)
dprintf("%s%d/n",p_str,100); /* Print "Hello World" */

dprintf("%s:%d,%d/n","Nme",120,56);

while (1) {
P1 ^= 0x01; /* Toggle P1.0 each time we print */

}
}

转载于:https://www.cnblogs.com/fedorayang/archive/2009/03/20/5094234.html