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USART 的代码
usart_main.c
/***********************************************
**** AVR USART串口使用范例 ***
**** ***
**** 作者： HJJourAVR ***
**** 编译器
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
uart.c
#include
#include "Uart.h"
/*
1.USART数据寄存器-UDR
7 6 5 4 3 2 1 0 ??
2.USART控制和状态寄存器A - UCSRA
7 RXC USART接收完成
6 TXC USART发送完成
5 UDRE USART数据寄存器空
4 FE 接收帧出错
3 DOR 接收数据溢出
usart.c
#ifndef _REFERENCE
//*-----------------------------------------------------------------------------
//* ATMEL Microcontroller Software Support - ROUSSET -
//*-------------------------------
usart.h
//*-----------------------------------------------------------------------------
//* ATMEL Microcontroller Software Support - ROUSSET -
//*---------------------------------------------------
usart.inc
;-----------------------------------------------------------------------------
;- ATMEL Microcontroller Software Support - ROUSSET -
;--------------------------------------------------------
usart.h
//usart.h
#define BIT0 0x00000001
#define BIT1 0x00000002
#define BIT2 0x00000004
#define BIT3 0x00000008
#define BIT4 0x00000010
#define BIT5
usart.c
//usart.c
#include "usart.h"
#include "AT91SAM7S64.h"
AT91PS_PIO u_pPio = AT91C_BASE_PIOA;
AT91PS_PMC u_pPMC = AT91C_BASE_PMC;
AT91PS_USART u_pUSART0 = AT91C_BASE_US0;
AT91PS_USAR
usart.c
#define USART_C
#include "includes.h"
int usart_putchar(char c)
{
if (c == '\n')
usart_putchar('\r');
while(UCSRA&(1