#include?“reg51.h“
#include?“intrins.h“

typedef?unsigned?char?BYTE;
typedef?unsigned?int?WORD;

#define?UART_IDLE	???0
#define?UART_SND_BUSY??1
#define?UART_RCV_BUSY??1
#define?FOSC?11059200L
//緩沖區大小
#define?RECV_BUFFER_SIZE?5

//sbit?bit9?=?P2^2;
bit?busy;

//接收緩沖數據結構
struct?RecvBuffer
{
	BYTE?buffer[RECV_BUFFER_SIZE];//使用數組定義緩存大小
	long?out;
	long?in;
	long?rbufCount;//緩存大小計數
};

struct?RecvBuffer?rbuf;

//--------------------------------------------------------
//發送程序
//--------------------------------------------------------

void?SendData（BYTE?dat）
{
	while（busy?!=?UART_IDLE）;
	busy?=?UART_SND_BUSY;//清標志位
	SBUF?=?dat;
}

?//--------------------------------------------------------
?//初始化發送的數據
?//--------------------------------------------------------
//發送字符串
void?SendString（char?*s）
{
	while（*s）
	{
		SendData（*s++）;
	}
}
//---------------------------------------------------------
//接收緩存區定義
//---------------------------------------------------------		??

//uart接收數據緩沖區
void?rbuf_init（struct?RecvBuffer?*?rbuf）;
long?rbuf_conten_size（struct?RecvBuffer?*?rbuf）;
void?rbuf_clear（struct?RecvBuffer?*?rbuf）;
void?delay（long?count）;
//-----------------------------------------------------
//-----------------------------------------------------

//uart接收緩沖?初始化
void?rbuf_init（struct?RecvBuffer?*?rbuf）
{
	rbuf_clear（rbuf）;
}

//uart接收緩沖?清空緩沖
void?rbuf_clear（struct?RecvBuffer?*?rbuf）
{
	rbuf->rbufCount?=?rbuf->out?=?rbuf->in?=?0;
}

//清空串口數據
void?uartFlash（）
{
	rbuf_clear（&rbuf）;
}

//--------------------------------------------------------
//--------------------------------------------------------

//uart接收緩沖?獲取數據大小
long?rbuf_conten_size（struct?RecvBuffer?*?rbuf）
{

	return?rbuf->rbufCount;
}

//----------------------------------------------------------------
//uart接收緩沖?從緩沖讀取
//----------------------------------------------------------------

long?rbuf_write_to_buf（struct?RecvBuffer?*?rbufBYTE?*?bufferlong?count）
{
	//計算COPY的大小
	long?i;
	long?rbufCount?=?rbuf_conten_size（rbuf）;//-----?
	long?cpyCount;
	?//rbuf沒有數據
	?if（rbufCount?==?0）
	?{
	?	return?0;
	?}

	?//不拷貝數據
	?if（count?==?0）//count沒有賦初值?
	?{
	?	return?0;
	?}

	//保證要拷貝的大小，不超過緩沖區
	cpyCount?=?rbufCount?>?count??count?:?rbufCount;

	for（i?=?0?;?i?	{
		//COPY?串口數據更新rbuf
		buffer[i]?=?rbuf->buffer[rbuf->out];
?		++rbuf->out;
		rbuf->out?=?rbuf->out?%??RECV_BUFFER_SIZE;

	}
	
	//
	while（busy?==?UART_RCV_BUSY）;
	ES?=?0;
	rbuf->rbufCount?-=?cpyCount;
	ES?=?1;

	return?cpyCount;
}
//---------------------------------------------------------
//串口初始化
//---------------------------------------------------------

void?uartInit（long?baud）
{
	TMOD=?0x20;//定時器工作方式選擇
	SCON=0x50;//串口工作方式選擇
	TH1=?TL1?=?-（FOSC/12/32/baud）;//裝載計數初值
	TR1?=?1;//開啟定時器1
	ES?=?1;
	EA?=?1;

	rbuf_init（&rbuf）;
}

//----------------------------------------------------------
//接收

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????4231??2012-11-24?19:02??光電編碼\51uart.c

?????文件????????604??2012-11-26?13:16??光電編碼\51uart.h

?????文件???????8878??2012-11-28?21:15??光電編碼\51uart.LST

?????文件??????10270??2012-11-28?21:15??光電編碼\51uart.OBJ

????.......?????50521??2012-11-24?17:10??光電編碼\guangdian.uvopt

????.......?????????0??2012-11-24?17:09??光電編碼\guangdian_uvproj.bak

?????文件???????3954??2012-11-28?21:15??光電編碼\HXA.c

?????文件??????16253??2012-11-28?21:15??光電編碼\光電編碼

?????文件???????3253??2012-11-28?20:56??光電編碼\光電編碼.c

?????文件???????5970??2012-11-28?21:15??光電編碼\光電編碼.hex

?????文件?????????48??2012-11-28?21:15??光電編碼\光電編碼.lnp

?????文件??????10417??2012-11-28?21:15??光電編碼\光電編碼.LST

?????文件??????20408??2012-11-28?21:15??光電編碼\光電編碼.M51

?????文件???????7674??2012-11-28?21:15??光電編碼\光電編碼.OBJ

?????文件????????169??2012-11-28?21:16??光電編碼\光電編碼.plg

????.......?????57310??2012-11-28?21:16??光電編碼\光電編碼.uvopt

????.......?????13413??2012-11-24?19:08??光電編碼\光電編碼.uvproj

????.......?????57306??2012-11-28?21:15??光電編碼\光電編碼_uvopt.bak

????.......?????13247??2012-11-24?17:09??光電編碼\光電編碼_uvproj.bak

?????目錄??????????0??2012-11-28?21:16??光電編碼

-----------?---------??----------?-----??----

???????????????283926????????????????????20