AVR MEGA8 当UART收到和本单元一样的地址后发送 PORTC 的C0-C3状态

jack

//ICC-AVR application builder : 28-Nov-2007  By HP Zhou
// Target : M8
// Crystal: 8.0000Mhz

#include <iom8v.h>
#include <macros.h>
#define uint unsigned int
unsigned char Sc;
unsigned char Tdata;
unsigned char Addr ;


//PORT Initialize >>>>>>>>
void port_init(void)
{
PORTC = 0xF0;
DDRC  = 0x00;
PORTD = (1<<PD2);
DDRD = (1<<DDD2);
}

//UART0 initialize >>>>>>>
// desired baud rate: 9600
// actual: baud rate:9615 (0.2%)
// char size: 8 bit,1 bit stop
// parity: Disabled
void uart0_init(void)
{
UCSRB = 0x00; //disable while setting baud rate
UCSRA = 0x00;
UCSRC = BIT(URSEL) | 0x06;
//UCSRC = (1<<URSEL)|(1<<UCSZ1)|(1<<UCSZ0);
UBRRL = 0x33; //set baud rate lo
UBRRH = 0x00; //set baud rate hi
UCSRB = 0xF8;
// ;UCR=0XD8;
//UCSRB = (1<<RXEN)|(1<<TXEN);
}

// Delay_Ms >>>>>>>>>
void delayMs(uint i)
{uint j;
for(;i!=0;i--)
{for(j=8000;j!=0;j--) ;}
}

// UART TRANSMIT   >>>>>>>>>
void Transmit(Tdata)
{
PORTD&=0XFD;
while (!(UCSRA&(1<<UDRE))) //wait txr be zeno
UDR = Tdata;
while (UCSRA&(1<<TXC))
  {
   delayMs (5);
   PORTD = (1<<PD2);
  }
}

// UART RECIVE DATA  >>>>>>>>>
unsigned char Rdata(void)
{
//;while (!(USR&0X80))
while (!(UCSRA&(1<<RXC))) //wait txr be zeno
  return UDR;
}
//Rdata = UDR;


// Read PORTC STAUTE  >>>>>>>>>
unsigned char Staute(Sc)
{
  unsigned char Sc1;
  Sc = 0xF3;
  Sc1 = 0xF3;
  for(;;)
  {
   Sc1 = PINC;
   if (Sc^Sc1)
    {
     delayMs(20);
         Sc = PINC;
     if (Sc & Sc1)
         Sc = Sc1;
     return Sc;
        }
   }
  }

//  Main program >>>>>>>>>
void main (void)
{
Addr = C1;  //             ??地址变量
unsigned char tchr;
unsigned char stau;
port_init();
uart0_init();
//GIMSK = 0X00;
CLI();
for(;;)
{
tchr = Rdate();
stau = Staute();
while (tchr & Addr)
    Transmit(stau);  
    delayMs(10);
  }
}


个位高手,帮我看看,还有那些问题,. 地址从何出输入?.

machao

建议LZ先从本栏的置顶帖子中,下载我的书前2篇11章内容参考学习.

如果觉得有帮助,可以购买本书,书中有2章(13\14)介绍USART的使用.