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USART 的代码
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
软件模拟usart.txt
转：软件模拟<mark>USART</mark>
在用单片机开发各种嵌入式应用系统时，异步串行通信是经常要用到的一种通信模式，很多应用中还要求实现多路异步串行通信。大家平时熟悉的各种厂家的单片机，绝大部分片上只提供一个硬件UART模块，利用它可以方便实现一路串行通讯。PIC系列单片机也不例外，在其丰富的产品家族成员中，除高端系列（PIC17/18）一些型号片上带有两路硬件UART模块外，其它大部分型号 ...
usart.c
#define USART_C
#include "includes.h"
int usart_putchar(char c)
{
if (c == '\n')
usart_putchar('\r');
while(UCSRA&(1
includes.h
#include "main.h"
#include "delay.h"
//#include "horse.h"
//#include "lcd.h"
//#include "ad.h"
#include "init.h"
#include "number.h"
//#include "usart.h"
#include
//#include
usart.c
#define USART_C
#include "includes.h"
int usart_putchar(char c)
{
if (c == '\n')
usart_putchar('\r');
while(UCSRA&(1
includes.h
#include "main.h"
#include "delay.h"
//#include "horse.h"
//#include "lcd.h"
//#include "ad.h"
#include "init.h"
#include "number.h"
//#include "usart.h"
#include
//#include
includes.h
#include "main.h"
#include "delay.h"
#include "horse.h"
//#include "lcd.h"
//#include "ad.h"
//#include "init.h"
//#include "usart.h"
#include
//#include
includes.h
#include "main.h"
#include "delay.h"
#include "lcd.h"
#include "ad.h"
#include "init.h"
#include "usart.h"
#include
//#include
includes.h
#include "main.h"
#include "delay.h"
//#include "horse.h"
#include "lcd.h"
//#include "ad.h"
//#include "init.h"
//#include "number.h"
//#include "usart.h"
#include
//#include
includes.h
#include "main.h"
#include "delay.h"
//#include "horse.h"
//#include "lcd.h"
//#include "ad.h"
#include "init.h"
#include "number.h"
//#include "usart.h"
#include
//#include