main.c

经过测试成功的PDIUSBD12与Mega8的连接代码

//ICC-AVR application builder : 2008-5-18 17:17:14
// Target : M8
// Crystal: 8.0000Mhz

#include <iom8v.h>
#include <macros.h>

#include "define.h"
#include "D12API.h"
#include "M8API.h"

void port_init(void)
{
 PORTB = 0xFF;
 DDRB  = 0xFF;
 PORTC = 0x00; //m103 output only
 DDRC  = 0x00;
 PORTD = 0xFF;
 DDRD  = 0xFF;
}

//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 = 0x67; //set baud rate lo
 UBRRH = 0x00; //set baud rate hi
 UCSRB = 0x18;
}

#pragma interrupt_handler int0_isr:iv_INT0
void int0_isr(void)
{
 //external interupt on INT0
}

//call this routine to initialize all peripherals
void init_devices(void)
{
 //stop errant interrupts until set up
 CLI(); //disable all interrupts
 port_init();//初始化I/O口
 uart0_init();//初始化串行口
	//注:串行口是用来外扩LCD和键盘,用于查询显示当前的工作状态

 MCUCR = 0x00;
 GICR  = 0x40;
 TIMSK = 0x00; //timer interrupt sources
 SEI(); //re-enable interrupts
 //all peripherals are now initialized
}
/****/
//API

/****/


/*****************   延时x毫秒函数 ***********/
void delay(unsigned int x)                
{
 unsigned int i;
 unsigned int j;
 for(i=0;i<x;i++)
 for(j=0;j<230;j++);
}
/********************************************/

void main(void)
{
 init_devices();
 Prints("系统启动................................",1);
 delay(1000);	 //延迟
 disconnect_usb(); 	   //断开USB连接
 init_usb();		   //初始化USB芯片
 connect_usb();		   //连接USB
 KeyMapCanChange=1;

 while(1)
  { 
   if(!USB_INT)		//中断产生
    {
  	 read_interrupt_register();
	 if(Interrupt_Register.Interrupt.bus_reset){usb_bus_reset();continue;}
	 if(Interrupt_Register.Interrupt.suspend_change){usb_bus_suspend();continue;}
     if(Interrupt_Register.Interrupt.control_out_port){endp0_out();continue;}
	 if(Interrupt_Register.Interrupt.control_in_port&&usb_flags.flags.usb_endp0_in){endp0_in();continue;}
//	 if(Interrupt_Register.Interrupt.port_out_1)endp1_out();
//	 if(Interrupt_Register.Interrupt.port_in_1)endp1_in();
	 if(Interrupt_Register.Interrupt.main_out_port){endp2_out();}
	 if(Interrupt_Register.Interrupt.main_in_port){endp2_in();}
    }
  }
}