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USART 的代码
usart.c
#define USART_C
#include "includes.h"
int usart_putchar(char c)
{
if (c == '\n')
usart_putchar('\r');
while(UCSRA&(1
usart.h
/******************************************************************
本程序只供学习使用，未经作者许可，不得用于其它任何用途
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includes.h
#if !defined(INCLUDES_H)
#define INCLUDES_H
#include
#include
#include "ds1302.h"
#include "lcd.h"
#include "delay.h"
//#include "usart.h"
#endif
includes.h
#if !defined(INCLUDES_H)
#define INCLUDES_H
#define ENABLE_BIT_DEFINITIONS
#include
#include "ds1302.h"
#include "hd44780.h"
#include "delay.h"
#include "usart.h"
#endif
usart_main.c
/***********************************************
**** AVR USART串口使用范例 ***
**** ***
**** 作者： HJJourAVR ***
**** 编译器
testuart.tagsrc
E:\Mysoft\TestUart\main.c
E:\Mysoft\TestUart\usart.c
E:\Mysoft\TestUart\usart.h
usart.lst
HI-TECH Software PICC Macro Assembler V9.50PL2
Sat Sep 16 09:34:47 2006
1 processor 16F73
2
main.c
#include
#include
#include "usart.h"
/* A simple demonstration of serial communications which
* incorporates the on-board hardware USART of the Microchip
* PIC16Fxxx series
usart.c
#include
#include
#include "usart.h"
void
putch(unsigned char byte)
{
/* output one byte */
while(!TXIF) /* set when register is empty */
continue;
TXREG = byte;
}
testuart.tagsrc
E:\Mysoft\TestUart\main.c
E:\Mysoft\TestUart\usart.c
E:\Mysoft\TestUart\usart.h