touchinterface.c

RS232 和 RS485 互相转换

/*===========================
TouchInterface.c
===========================*/
#include "TouchInterface.h"

unsigned char test_str[]="123456789\n";

unsigned int  buzzer_time=100;

/*===========================
===========================*/
void McuInit(void)
{
  CLI();
  //PORT
  PORTA=0xff;
  DDRA =0x90;
  PORTB=0xff;
  DDRB =0x10;
  PORTC=0xff;
  DDRC =0x00;
  PORTD=0xff;
  DDRD =0x00;
  PORTE=0xff;
  DDRE =0x00;
  //
  WDR();
  WDTCR=0x18;
  WDTCR=0x1f;
  //UART0 initialisation
  // desired baud rate: 9600
  // actual: baud rate:9600 (0.0%)
  // char size: 8 bit
  // parity: Disabled
  UCSR0B = 0x00; //disable while setting baud rate
  UCSR0A = 0x00; //disable while setting baud rate
  UBRR0L  =0x47; //set baud rate
  UBRR0H = 0x00;
  UCSR0C = 0x86;
  UCSR0A = 0x00; //enable
  UCSR0B = 0x98; //enable
  //UART1 initialisation
  // desired baud rate:19200
  // actual baud rate:19200 (0.0%)
  // char size: 8 bit
  // parity: Disabled
  UCSR1B = 0x00; //disable while setting baud rate
  UCSR1A = 0x00; //disable while setting baud rate
  UBRR1L  =0x23; //set baud rate
  UBRR1H = 0x00;
  UCSR1C = 0x86;
  UCSR1A = 0x00; //enable
  UCSR1B = 0x98; //enable
  //TIMER0 initialisation - prescale:256
  // WGM: Normal
  // desired value: 1mSec
  // actual value:  0.995mSec (0.5%)
  TCCR0= 0x00; //stop
  TCNT0= 0xD5; //set count
  OCR0= 0x2B; //set compare value
  TCCR0= 0x04; //start timer
  
  //MCU
  MCUCR= 0x00; 
  EMCUCR = 0x00;
//  GIMSK= 0x00;
  TIMSK= 0x02; //timer interrupt sources
  ETIMSK=0x00;
  GICR= 0x00;
  PCMSK0=0x00;
  PCMSK1=0x00;
  
  SEI();
}
/*===========================
===========================*/
void main(void)
{
  McuInit();
  DelayMs(100);
  EN485RXD();
  //for test
  UartTxdStr(RS232_PORT,test_str,10);
  UartTxdStr(RS485_PORT,test_str,10);
  LEDon();
  
  while(1)
  {
    WDR();
  }
}
/*===========================
===========================*/
#pragma vector=USART0_RXC_vect
__interrupt void uart0_rx_isr(void)
{
  //uart has received a character in UDR
  unsigned char tmp;
  tmp=UDR0;
  
  UartTxd0(tmp);
  
/*  EN485TXD();
  UartTxd1(tmp);
  EN485RXD();*/
}
/*===========================
===========================*/
#pragma vector=USART1_RXC_vect
__interrupt void uart1_rx_isr(void)
{
  //uart has received a character in UDR
  unsigned char tmp;
  tmp=UDR1;
  
//  UartTxd0(tmp);
  
  EN485TXD();
  UartTxd1(tmp);
  EN485RXD();
}
/*===========================
===========================*/
#pragma vector=TIMER0_OVF_vect
__interrupt void timer0_ovf_isr(void) //1mS
{
  TCNT0= 0xD5; //reload counter value
  LEDblink();
  if(buzzer_time)
  {
    buzzer_time--;
    BUZZERon();
  }
  else
  {
    BUZZERoff();
  }
  
}
/*===========================
END
===========================*/