uart.c

C8051FTest.rar 是C8051F系列处理器的基本测试程序

#include <string.h>
#include <stdio.h>
#include "uart.h"
#include "menu.h"
#include "Lcd.h"
#include "system.h"
	
#define MAXLEN 2000				//Uart接收数据区
char xdata Mydata[MAXLEN]; 

char *USP;						//Uart发送字符串指针
char UBUSY;						//Uart发送忙标志位
char xdata *URP=Mydata;			//Uart接收指针，指向数据接受区

////////////////////////////////////////////////////////////////////////////////////////////////

//串口模块参数设置菜单
char code *UartConfigMenu={"(10,2)串口传输实验参数设置,(6,60)波特率设置: ,1200,2400,4800,9600,\
19200,28800,57600,115200,(6,90)显示方式: ,字符,十六进制,(6,120)数据返回: ,打开,关闭,"};

//串口模块参数默认值
unsigned char UartParaList[]={3,0,0};

////////////////////////////////////////////////////////////////////////////////////////////////
void Hexprintf(unsigned char  x,unsigned char  y, char *ptr) 	//以十六进制显示*ptr
{
	unsigned char temp;
	unsigned int low,high;
	char buf[10];
	temp=*ptr;
	high=temp/16;
	low=temp%16;
	sprintf(buf,"%X%X%s",high,low," \0");
	tprintf(x,y,buf);
	if (X>=39)					
	{
		X=0;
		Y+=16;
	}
}
         
void UartSend(char *ptr)		//通过UART发送指定字符串
{
	char SFRPAGE_SAVE;
	SFRPAGE_SAVE=SFRPAGE;
	SFRPAGE=UART0_PAGE;
	USP=ptr;
	TI0=1;
	SFRPAGE=SFRPAGE_SAVE;
}

void inter() interrupt 4
{
	if (TI0)					//发送USP指向字符
	{
		TI0 = 0;
		if(*USP!='\0')
		{
			SBUF0 = *USP;
			USP++;
		}
		else
		{
			UBUSY=0;
		}
	}
	if (RI0)					//将数据保存到数据接收区
	{
		RI0 = 0;
		if( URP-Mydata < MAXLEN-1 )
		{
       		*URP = SBUF0;
			URP++;
		}
	}
}

void uart_port_ini(void)
{
    SFRPAGE = 0x0F;
    XBR0 |= 0x04;                  	//Uart引出到管脚:Tx到P0.0;Rx到P0.1
    XBR2 |= 0x40;				   	//弱上拉全局允许,交叉开关使能
    P0MDOUT |= 0x01;
	IE |= 0x90;
}

void uart_ini(unsigned char Sel_Baud)
{
	SFRPAGE = 0x00;
    SSTA0 = 0x10;  					//选择T1作为时钟源,禁止波特率2分频
    SCON0 = 0x50;  					//Uart工作在方式1:8位可变波特率.忽略停止位.接受允许.
    CKCON = 0x00;  					//sys/12 -> T1
    TMOD |= 0x20;  					//T1工作方式:自动再装入8位定时器
	//波特率设置
	switch (Sel_Baud)
	{								// 波特率设置=256-22.1184M/12/16/Baud
		case 0:	TH1 = 160;	break;	//	1200		
		case 1:	TH1 = 208;	break;	//	2400
		case 2:	TH1 = 232;	break;	//	4800
		case 3:	TH1 = 244;	break;	//	9600
		case 4:	TH1 = 250;	break;	//	19200
		case 5:	TH1 = 252;	break;	//	28800
		case 6:	TH1 = 254;	break;	//	57660
		case 7:	TH1 = 255;	break;  //	115200
	}  				
	TL1 = TH1;
	TR1 = 1;
}

//串口模块函数
void Uart()
{		
	char *p[20];                		//记录每页显示的起始地址,支持最多20页显示
	unsigned char currentp;   			//记录当前页号
	char xdata *DSP;					//显示指针    
	unsigned char Disflag;           	//显示接收数据标志位  
	unsigned int RCounter;				//记录接收字节数
	char SFRPAGE_SAVE;					//保存SFR值

	if(MenuActive(UartConfigMenu, UartParaList)==0)		//放弃菜单设置，直接退出
	return ;
	uart_port_ini();
	uart_ini(UartParaList[0]);
	UartSend("C8051f124 UART ready!!");
	
	SFRPAGE=0x0F;	
	Udprintf(0,208,"  波特率:                               ");
	switch (UartParaList[0])
	{						
		case 0:	Udprintf(10,208,"1200");	break;		
		case 1:	Udprintf(10,208,"2400");	break;
		case 2:	Udprintf(10,208,"4800");	break;
		case 3:	Udprintf(10,208,"9600");	break;
		case 4:	Udprintf(10,208,"19200");	break;
		case 5:	Udprintf(10,208,"28800");	break;
		case 6:	Udprintf(10,208,"57600");	break;
		case 7:	Udprintf(10,208,"115200");	break;
	}   						
	dprintf(26,224,"暂停 清空 退出");	
	Key[6].pressed=1;						//进行初始化

	while(1)
	{
		if(Key[6].pressed==1)            	//检测到清空键
		{
			int i;	
			Clear(0,208);		
		 	currentp=0;   
			DSP=Mydata;	
	   	    URP=Mydata;
			USP=Mydata;
			Disflag=1; 
            RCounter=0;	 
   		  	for(i=0;i<20;i++)
			p[i]=Mydata;
			for(i=0;i<MAXLEN;i++)
			Mydata[i]='\0';					
			X=0;
			Y=0;			
			dprintf(1,224,"  ");
			dprintf(6,224,"  ");
			dprintf(26,224,"暂停");
			Udprintf(20,208,"接收字节数: 0     ");
			SFRPAGE_SAVE=SFRPAGE;
			SFRPAGE=UART0_PAGE;
			REN0=1;					//接受允许
			SFRPAGE=SFRPAGE_SAVE;
			Key[6].pressed=0;		
		}

		if(CheckKeyF==1)							//键盘检测           
	    {		
			CheckKey();
        	CheckKeyF=0;
	    }	

		if (URP > DSP)								//检测新接收数据
		{
			if(Disflag==1)							//是否需要显示
			{
				if(UartParaList[1]==0)
					DSP=tprintf(X,Y,DSP);	
				else
				{
					Hexprintf(X,Y,DSP);
					DSP++;
				}
				if(F)								//写满了一页
				{
					Disflag=0;						//关显示
					if(UartParaList[1]==1)	DSP--;
					p[currentp+1]=DSP;				//记录下页地址
					dprintf(6,224,DownArrow);	
				}
			}

			if(RCounter!=(URP-Mydata))				//显示接收字节数
			{
				RCounter=(URP-Mydata);
				if(RCounter==MAXLEN-1)				//数据区满
				{
					Udprintf(20,208,"接收区已满(2k字节)");
					SFRPAGE_SAVE=SFRPAGE;			//关掉UART	
					SFRPAGE=UART0_PAGE;
					REN0=0;
					SFRPAGE=SFRPAGE_SAVE;
				}
				else								//刷新数字				
				{
					char buf[10];
					sprintf(buf,"%d",RCounter);
					Udprintf(32,208,buf);
				}
			}
		}

		if(Key[1].pressed==1)				//检测到下键
		{
			if(p[currentp+1]!=Mydata)		//可以向下翻页
			{
				currentp++;
				Clear(0,208);
				dprintf(1,224,UpArrow);
				if(UartParaList[1]==0)
				{
					DSP=tprintf(0,0,p[currentp]);
					if(F==0)					//写完了,未写满一页，等待接收显示新数据
					{
						Disflag=1;
						dprintf(6,224,"  ");
					}
					else						//该页已写满                     
					{
						Disflag=0;
						p[currentp+1]=DSP;
						dprintf(6,224,DownArrow);
					}
				}
				if(UartParaList[1]==1)
				{
					dprintf(6,224,"  ");
					DSP=p[currentp];
					Disflag=1;
					F=0;
					X=0;
					Y=0;
				}
			}
			Key[1].pressed=0;
		}

		if(Key[0].pressed==1)				//向上翻页
		{
			if(currentp>0)					//可以向上翻页
			{
				currentp--;
				Clear(0,208);
				if(currentp>0)
				{
					dprintf(1,224,UpArrow);
				}
				else
				{
					dprintf(1,224,"  ");
				}
				dprintf(6,224,DownArrow);
				if(UartParaList[1]==0)
				tprintf(0,0,p[currentp]);
				if(UartParaList[1]==1)
				{
					Disflag=1;
					DSP=p[currentp];
					F=0;
					X=0;
					Y=0;
				}
			}
			Key[0].pressed=0;
		}

		if(Key[5].pressed==1)            	//暂停
		{
			char temp;
			SFRPAGE_SAVE=SFRPAGE;			//切换Uart开关	
			SFRPAGE=UART0_PAGE;
			REN0=~REN0;
			temp=REN0;
			SFRPAGE=SFRPAGE_SAVE;
			if(temp==0)						//当前为暂停状态
			{
				Udprintf(16,224,"暂停接收");
				dprintf(26,224,"继续");
			}
			else							//当前为接收状态			
			{
				dprintf(16,224,"        ");
				dprintf(26,224,"暂停");
			}
			Key[5].pressed=0;
		}
	
		if(Key[7].pressed==1)            	//退出串口模块
		{
			ClearKey();						//清按键
			Clear(0,240);					//清屏幕
			SFRPAGE_SAVE=SFRPAGE;					
			SFRPAGE=UART0_PAGE;
			REN0=0;							//关闭Uart接受
			TR1=0;							//关T1
			SFRPAGE=SFRPAGE_SAVE;
			return;
		}
		
		if(UartParaList[2]==0)				//数据返回
		{		
			if(UBUSY==0)					//Uart发送空闲
			{
				if( USP<URP )				//有字节需要发送
				{
					UBUSY=1;				//Uart忙
					SFRPAGE_SAVE=SFRPAGE;					
					SFRPAGE=UART0_PAGE;	
					TI0=1;					//进入发送中断
					SFRPAGE=SFRPAGE_SAVE;
				}
			}
		}					
	}
}