7個(gè)范例程序的測(cè)試結(jié)果
1、字符模式設(shè)備范例.txt 
--上位機(jī)串口波特率115200,在硬件上全速運(yùn)行程序后控制臺(tái)收到:
This application will printf 'Hello world' to uart1!
串口上收到:
hello world

2、Alarm范例.txt  
--在my_alarm_callback()函數(shù)return前,加入了一條printf("CallCounter's Value is %d!\n",CallCounter);，在硬件上全速運(yùn)行程序后收到:
CallCounter's Value is 1!

3、ISR范例.txt
--在硬件上全速運(yùn)行程序后收到:
ISR Demo!
Timer interrupt has occurred for: 0 times
Timer interrupt has occurred for: 1 times
Timer interrupt has occurred for: 2 times
Timer interrupt has occurred for: 3 times
…………

4、HighResTimer范例.txt
--在硬件上全速運(yùn)行程序后收到:
Elapsed time in func1 = 993 us
Elapsed time in func1 = 4830 us

5、DMA范例.txt
--在SOPC Builder中建一個(gè)RAM型On-chip_memory命名為onchip_RAM_4K(也可取其它名)，建一個(gè)DMA命名為dma，將dma的read_master、write_master與onchip_RAM_4K連接.在硬件上全速運(yùn)行程序后收到:
DMA Demo(Memory to Memory)!
Create the transmit channel successfully!
Create the receive channel successfully!
Post the transmit request successfully!
Post the receive request successfully!

6、Simple Flash Access驅(qū)動(dòng)范例.txt
--在硬件上全速運(yùn)行程序后收到:
Simple Flash Access Demo.
Open Flash Device Successfully.
Write Flash Device Successfully.
Read Flash Device Successfully.
Verify Successfully!

7、Fine-gained Flash Access驅(qū)動(dòng)范例.txt
--在硬件上全速運(yùn)行程序后收到:
Fine-gained Flash Access Demo.
Open Flash Device Successfully.
Erase Flash Device Successfully.
Write Flash Device Successfully.
Read Flash Device Successfully.
Verify Successfully!

Alarm范例程序經(jīng)過(guò)修改之后，可以看到重復(fù)進(jìn)my_alarm_callback()函數(shù)了
控制臺(tái)顯示結(jié)果為:
my_alarm_callback has been called for: 0 times
my_alarm_callback has been called for: 1 times
my_alarm_callback has been called for: 2 times
my_alarm_callback has been called for: 3 times
my_alarm_callback has been called for: 4 times
…………

/*
* 一、功能: Alarm演示代碼修改版.
* 
* 二、相關(guān)說(shuō)明：
*    由于NiosII IDE的ISS(Instruction Set Simulation)支持JTAG_UART和定時(shí)
*    器的仿真功能,所以該源碼可以運(yùn)行在ISS模式下,而無(wú)須任何硬件開(kāi)發(fā)板的支持.
* 
* 三、運(yùn)行前提:
*    1. 選擇包含JTAG_UART和具有周期中斷功能的定時(shí)器的NiosII系統(tǒng)(ptf文件);
*    2. 在系統(tǒng)庫(kù)屬性中完成下面的配置:
*        (1) 將stdout映射到JTAG_UART;
*        (2) 將具有周期中斷功能的定時(shí)器映射為系統(tǒng)時(shí)鐘;
* 
*/
#include <stdio.h>
#include "sys/alt_alarm.h"
#include "alt_types.h"

//定義my_alarm_callback函數(shù)的重復(fù)調(diào)用周期
//INTEVAL_TICK不能太大,因?yàn)镮SS對(duì)定時(shí)器的仿真需要很長(zhǎng)的時(shí)間,這里取1即可
//在SOPC Builder中對(duì)定時(shí)器周期的設(shè)定也不要太大,1ms即可
#define INTEVAL_TICK 1 //單位:系統(tǒng)時(shí)鐘周期

//定義全局靜態(tài)變量對(duì)my_alarm_callback的被調(diào)用次數(shù)進(jìn)行計(jì)數(shù);
static int CalledCounter = 0;
/* 定義欲注冊(cè)為Alarm的callback函數(shù); */
alt_u32 my_alarm_callback (void* context)
{
  CalledCounter++;

  //返回值決定在返回后的多少個(gè)系統(tǒng)時(shí)鐘周期后,my_alarm_callback函數(shù)再次被調(diào)用;
  return INTEVAL_TICK;
}

int main()
{
  //在注冊(cè)alarm之前,必須先定義一個(gè)alt_alarm類型的變量(無(wú)須初始化),
  //并將它作為alarm注冊(cè)函數(shù)alt_alarm_start的輸入?yún)?shù);
  static alt_alarm alarm;
  //當(dāng)alt_alarm_start注冊(cè)成功時(shí)返回0,否則返回負(fù)數(shù);
  if(  
      alt_alarm_start(&alarm,
                      INTEVAL_TICK,
                      my_alarm_callback,
                      NULL
                      ) < 0
    )
    {
      printf ("No system clock available\n" ) ;
    }
    
  //將my_alarm_callback的被調(diào)用次數(shù)由stdout設(shè)備輸出          
  printf("my_alarm_callback has been called for: %d times\n", CalledCounter) ;
  int Old_Value = CalledCounter;
  for( ; ; )
  {
    if(Old_Value != CalledCounter)
    {
      Old_Value = CalledCounter;
      printf("my_alarm_callback has been called for: %d times\n", Old_Value);
    }
  }  
}