bak.txt

基于Nios II的串口通信

/*
 * "Hello World" example.
 *
 * This example prints 'Hello from Nios II' to the STDOUT stream. It runs on
 * the Nios II 'standard', 'full_featured', 'fast', and 'low_cost' example
 * designs. It runs with or without the MicroC/OS-II RTOS and requires a STDOUT
 * device in your system's hardware.
 * The memory footprint of this hosted application is ~69 kbytes by default
 * using the standard reference design.
 *
 * For a reduced footprint version of this template, and an explanation of how
 * to reduce the memory footprint for a given application, see the
 * "small_hello_world" template.
 *
 */

#include <stdio.h>
#include "system.h"
#include "altera_avalon_pio_regs.h"
#include "alt_types.h"

void delay()
{
  int i=0;
  while(i<10000)
  i++;
}

int main()
{
  
//  while(1)
  
    int j,ctrl;
    unsigned char buffer[8];
    //puts(gets(buffer));
    /*printf("Hello from Nios II!");
    puts("你好！\0");
    
    puts("输入年龄\0");
    scanf("%d",&age);
    
    fflush(stdin);
    
    puts("输入姓名\0");
    scanf("%s",buffer);
    
    printf("你的年龄是%d.\n",age);
    printf("你的姓名是%s.\n",buffer);*/
    
    ctrl=IORD_ALTERA_AVALON_PIO_DATA(CTRL_PIO_BASE); //读取外接控制信号
      if( ctrl = 0 )
      {
         IOWR_ALTERA_AVALON_PIO_DATA(LED_PIO_BASE,0x8);//点亮禁止通信灯
      }
      if( ctrl = 1 )
      {
         j++;
         IOWR_ALTERA_AVALON_PIO_DATA(LED_PIO_BASE,0x7);//点亮通信许可灯
         
         while(1)
        { 
          printf("Input char\0");
          scanf("%s",buffer);
          if( buffer == "55\0" )
            { 
              printf("33\0");
              fflush(stdin);
            
              scanf("%s",buffer);
             if( buffer == "aa\0" )
                fflush(stdin);
                scanf("%s",buffer);
                int i=0;
                while(i<8)                
                {
                  buffer[i]= buffer[i]>>1;
                  i++;
                }
                printf("%s",buffer);
                fflush(stdin);
            }  
            else
            fflush(stdin);
            //scanf("%s",buffer);
            delay();
      }
         
    delay();
  }
  return 0;
}