temp._c

本源码为C语言环境的ATMAGE8的BootLoader开发程序

//ICC-AVR application builder : 2008-10-20 09:40:14
// Target : M8
// Crystal: 8.0000Mhz

#include <iom8v.h>
#include <macros.h>
#include "delay.h"
#include "boot.h"
void port_init(void)
{
 PORTB = 0x00;
 DDRB  = 0xFF;
 PORTC = 0x00; //m103 output only
 DDRC  = 0x00;
 PORTD = 0x00;
 DDRD  = 0x00;
}

//UART0 initialize
// desired baud rate: 9600
// actual: baud rate:9615 (0.2%)
void uart0_init(void)
{
 UCSRB = 0x00; //disable while setting baud rate
 UCSRA = 0x02;
 UCSRC = BIT(URSEL) | 0x06;
 UBRRL = 0x0C; //set baud rate lo
 UBRRH = 0x00; //set baud rate hi
 UCSRB = 0x98;
}

#pragma interrupt_handler uart0_rx_isr:iv_USART0_RXC
void uart0_rx_isr(void)
{ToBootloderCode(UDR);
 //uart has received a character in UDR
}
//call this routine to initialize all peripherals
void init_devices(void)
{
 //stop errant interrupts until set up
 CLI(); //disable all interrupts
 port_init();
uart0_init();
 MCUCR = 0x00;
 GICR  = 0x00;
 TIMSK = 0x00; //timer interrupt sources
 SEI(); //re-enable interrupts
 //all peripherals are now initialized
}

void main(void)
{
 init_devices();
 while(1)
 {
  PORTB=0X00;
  delay_nms(100);
  PORTB=0XFF;
  delay_nms(100);
 } 

}