1602与串口实际例子（电开版本）

这个直接放代码吧，一开始就是因为把不等于写成等于了所以全错完了，昨天才改的
main.c
#include<reg52.h>

sbit BUZZ = P1^3;

bit flagBuzzOn = 0;
unsigned char T0RH = 0;
unsigned char T0RL = 0;

extern void ConfigTimer0(unsigned int ms);
extern void ConfigUART(unsigned int baud);
extern void UartWrite(unsigned char *buf,unsigned char len);
extern void UartRxMonitor(unsigned char ms);
extern InitLcd1602();
extern UartDriver();
extern void LcdShowStr(unsigned char x,unsigned char y,unsigned char *str);
extern void LcdAreaClear(unsigned char x,unsigned char y,unsigned char len);

void main()
{
EA = 1;
ConfigTimer0(1);
ConfigUART(9600);
InitLcd1602();

while(1)
{
UartDriver();
}
}

bit CmpMemory(unsigned char *ptr1,unsigned char *ptr2,unsigned char len)
{
while(len--)
{
if(*ptr1++!= *ptr2++)
{
return 0;
}
}
return 1;
}
void UartAction(unsigned char *buf,unsigned char len)
{
unsigned char i;
unsigned char code cmd0[] = "buzz on";
unsigned char code cmd1[] = "buzz off";
unsigned char code cmd2[] = "showstr";
unsigned char code cmdLen[] = {
sizeof(cmd0)-1,sizeof(cmd1)-1,sizeof(cmd2)-1};
unsigned char code *cmdPtr[] = {
&cmd0[0],&cmd1[0],&cmd2[0]};
for(i = 0;i<sizeof(cmdLen);i++)
{
if(len>=cmdLen[i])
{
if(CmpMemory(buf,cmdPtr[i],cmdLen[i]))
{
break;
}
}
}
switch(i)
{
case 0:
  flagBuzzOn = 1;
  break;
case 1:
  flagBuzzOn = 0;
  break;
case 2:
  buf[len] = '\0';
        LcdShowStr(0,0,buf+cmdLen[2]);
        i = len - cmdLen[2];
        if(i<16)
        {
        LcdAreaClear(i,0,16-i);
        }
break;
default:
UartWrite("bad command.\r\n",sizeof("bad command.\r\n")-1);
return;
}
buf[len++] = '\r';
buf[len++] = '\n';
UartWrite(buf,len);
}

void ConfigTimer0(unsigned int ms)
{
                unsigned long tmp;

    tmp = 32768000/12;
                tmp = (tmp*ms)/1000;
    tmp = 65536 - tmp;
    tmp = tmp + 33;
    T0RH = (unsigned char)(tmp>>8);
    T0RL = (unsigned char)tmp;
    TMOD &= 0xF0;
    TMOD |= 0x01;
    TH0 = T0RH;
                TL0 = T0RL;
    ET0 = 1;
    TR0 = 1;
}

void InterruptTimer0() interrupt 1
{
TH0 = T0RH;
TL0 = T0RL;
if(flagBuzzOn)
{
BUZZ = ~BUZZ;
}
else
{
BUZZ = 1;
}
UartRxMonitor(1);
}

depart1
#include<reg52.h>

bit flagFrame = 0;
bit flagTxd = 0;
unsigned char cntRxd = 0;
unsigned char pdata bufRxd[64];

extern void UartAction(unsigned char *buf,unsigned char len);

void ConfigUART(unsigned int baud)
{
SCON = 0x50;
TMOD &= 0x0F;
TMOD |= 0x20;
TH1 = 255-(32768000/12/32)/baud;
TL1 = TH1;
ET1 = 0;
ES = 1;
TR1 = 1;
}

void UartWrite(unsigned char *buf,unsigned char len)
{
while(len--)
{
flagTxd = 0;
SBUF = *buf++;
while(!flagTxd);
}
}

unsigned char UartRead(unsigned char *buf,unsigned char len)
{
unsigned char i;

if(len>cntRxd)
{
len = cntRxd;
}
for(i = 0;i<len;i++)
{
*buf++ = bufRxd[i];
}
cntRxd = 0;
return len;
}

void UartRxMonitor(unsigned char ms)
{
static unsigned char cntbkp = 0;
static unsigned char idletmr = 0;

if(cntRxd>0)
{
if(cntbkp != cntRxd)
{
cntbkp = cntRxd;
idletmr = 0;
}
else
{
if(idletmr<30)
{
idletmr += ms;
if(idletmr>=30)
{
flagFrame = 1;
}
}
}
}
else
{
cntbkp = 0;
}
}

void UartDriver()
{
unsigned char len;
unsigned char pdata buf[40];

if(flagFrame)
{
flagFrame = 0;
len = UartRead(buf,sizeof(buf));
UartAction(buf,len);
}
}

void InterruptUART() interrupt 4
{
if(RI)
{
RI = 0;
if(cntRxd<sizeof(bufRxd))
{
bufRxd[cntRxd++] = SBUF;
}
}
if(TI)
{
TI = 0;
flagTxd = 1;
}
}

depart2
#include<reg52.h>
#define LCD1602_DB P0
sbit LCD1602_RS=P2^0;
sbit LCD1602_RW=P2^1;
sbit LCD1602_E=P1^2;
void Delay1us()               
{
  unsigned char a;
  a= 5;
  while (--a);
}
void LcdWaitReady()         
{
        unsigned char sta;
        LCD1602_DB=0xFF;
        LCD1602_RS=0;
        LCD1602_RW=1;
        do
        {
                LCD1602_E=1;           
                sta=LCD1602_DB;
                LCD1602_E=0;        
        }
        while(sta&0x80);                    
}
void LcdWritecmd(unsigned char cmd)  
{
        LcdWaitReady();                 
        LCD1602_RS=0;
        LCD1602_RW=0;
        LCD1602_DB=cmd;               
        Delay1us();
        LCD1602_E=1;
        Delay1us();
        LCD1602_E=0;           
}
void LcdWriteDat(unsigned char dat)
{
        LcdWaitReady();            
        LCD1602_RS=1;
        LCD1602_RW=0;
        LCD1602_DB=dat;            
  Delay1us();
        LCD1602_E=1;
        Delay1us();
        LCD1602_E=0;

}
void LcdSetCursor(unsigned char x,unsigned char y)
{
        unsigned char addr;
        if(y==0)              
        {
                addr=0x00+x;
        }
        else                  
        {
                addr=0x40+x;
        }
        LcdWritecmd(addr|0x80);      
}
void LCDShowstr(unsigned char x,unsigned char y,unsigned char *str,unsigned char len)
{
        LcdSetCursor(x,y);        
        while(len--)
        {
                LcdWriteDat(*str++);                 
        }
}
void LcdAreaClear(unsigned char x,unsigned char y,unsigned char len)
{
LcdSetCursor(x,y);
while(len--)
{
LcdWriteDat(' ');
}
}
void Initlcd1602()
{                        
        LcdWritecmd(0x38);   
        LcdWritecmd(0x0C);   
        LcdWritecmd(0x06);            
        LcdWritecmd(0x01);     
}