sendrcvself._c

ATmega16应用例子

//ICC-AVR application builder : 2005-6-30 17:44:36
// Target : M16
// Crystal: 7.3728Mhz

#include <iom16v.h>
#include "E:\ICCAVR_H\CmmICC.H"

#define DISP_PORT PORTA
#define DISP_DDR  DDRA

//UART0 initialisation
// desired baud rate: 9600
// actual: baud rate:9600 (0.0%)
// char size: 8 bit
// parity: Disabled
void uart0_init(void)
{
 UCSRB = 0x00; //disable while setting baud rate
 UCSRA = 0x00;
 UCSRC = 0x86;
 UBRRL = 47; //set baud rate lo
 UBRRH = 0x00; //set baud rate hi
 UCSRB = 0x98;
}

#pragma interrupt_handler uart0_rx_isr:12
void uart0_rx_isr(void)
{
 //uart has received a character in UDR
 DISP_PORT = UDR;
}


//call this routine to initialise all peripherals
void mcu_init(void)
{
 //stop errant interrupts until set up
 CLI(); //disable all interrupts
 uart0_init();
 MCUCR = 0x00;
 GICR  = 0x00;
 TIMSK = 0x00; //timer interrupt sources
 SEI(); //re-enable interrupts
 //all peripherals are now initialised
}

void main()
{
 uint8 counter;
 mcu_init();

 DISP_DDR=0xFF;
 
 while(1)
 {
  UDR=counter++;
   while(!(UCSRA&0x40));
      UCSRA|=0x40;
   delay50ms(4);
 }
 
}