sys_init.c

PV4协议转换为MODBUS RTU协议的程序

//ICC-AVR application builder : 2007-8-11 18:02:35
// Target : M64
// Crystal: 16.000Mhz

#include ".\Globle.h"
#include <macros.h>



void port_init(void)
{
 PORTA = 0x00;
 DDRA  = 0x00;
 PORTB = 0x00;
 DDRB  = 0x00;
 PORTC = 0x00; //m103 output only
 DDRC  = 0x20;
 PORTD = 0x00;
 DDRD  = 0x10;
 PORTE = 0x00;
 DDRE  = 0x00;
 PORTF = 0x00;
 DDRF  = 0x00;
 PORTG = 0x00;
 DDRG  = 0x00;
}

//UART0 initialize
// desired baud rate: 9600
// actual: baud rate:9615 (0.2%)
// char size: 8 bit
// parity: Disabled
void uart0_init(void)
{
 UCSR0B = 0x00; //disable while setting baud rate
 UCSR0A = 0x00;
 UCSR0C = 0x06;
 UBRR0L = 0x33; ; //set baud rate lo
 UBRR0H = 0x00; //set baud rate hi
 UCSR0B = 0x98;
}



//UART1 initialize
// desired baud rate:9600
// actual baud rate:9615 (0.2%)
// char size: 8 bit
// parity: Disabled
void uart1_init(void)
{
 UCSR1B = 0x00; //disable while setting baud rate
 UCSR1A = 0x00;
 UCSR1C = 0x06;
 UBRR1L = 0x33; ; //set baud rate lo
 UBRR1H = 0x00; //set baud rate hi
 UCSR1B = 0x98;
}

#if 0
//TIMER0 initialize - prescale:1024
// WGM: Normal
// desired value: 10mSec
// actual value:  9.984mSec (0.2%)
void timer0_init(void)
{
 TCCR0 = 0x00; //stop
 ASSR  = 0x00; //set async mode
 TCNT0 = 0x64; //set count
 OCR0  = 0x9C;
 TCCR0 = 0x07; //start timer
}
#endif

void timer0_init(void)
{
 TCCR0 = 0x00; //stop
 ASSR  = 0x00; //set async mode
 TCNT0 = 0xB2; //set count
 OCR0  = 0x4E;
 TCCR0 = 0x07; //start timer
}


//TIMER2 initialize - prescale:1024
// WGM: Normal
// desired value: 10mSec
// actual value:  9.984mSec (0.2%)
void timer2_init(void)
{
TCCR2 = 0x00; //stop
 TCNT2 = 0x16; //setup
 OCR2  = 0xEA;
 TCCR2 = 0x00; //startt
}




//call this routine to initialize all peripherals
void init_devices(void)
{
 //stop errant interrupts until set up
 CLI(); //disable all interrupts
 XDIV  = 0x00; //xtal divider
 XMCRA = 0x00; //external memory
 port_init();
 uart0_init();
 uart1_init();
 timer0_init();
 timer2_init();
 MCUCR = 0x00;
 EICRA = 0x00; //extended ext ints
 EICRB = 0x00; //extended ext ints
 EIMSK = 0x00;
 TIMSK = 0x41; //timer interrupt sources
 ETIMSK = 0x00; //extended timer interrupt sources
 SEI(); //re-enable interrupts
 //all peripherals are now initialized
}
#if 0
void  uart1_init(void)
{

 
 	UCSR1B = 0x00; //disable while setting baud rate
 	UCSR1A = 0x00;//en rxc
 
	UBRR0L = 0x67; //set baud rate lo
 	UBRR0H = 0x00; //set baud rate hi
 	UCSR1C = 0x00;
 	UCSR1C |= (1<<4);
 	UCSR1C |= (3<<1);
	UCSR1C |= (0<<3);
	//UCSR0C = 0x06;
 	UCSR1B|=(1<<RXCIE1)|/*(1<<TXCIE)|*/(1<<RXEN1)|(1<<TXEN1);
 	UCSR1A|=1<<1; //U2X1=1;

 
}
#endif