7个范例程序的测试结果.txt

NiosII的范例

7个范例程序的测试结果
1、字符模式设备范例.txt 
--上位机串口波特率115200,在硬件上全速运行程序后控制台收到:
This application will printf 'Hello world' to uart1!
串口上收到:
hello world

2、Alarm范例.txt  
--在my_alarm_callback()函数return前,加入了一条printf("CallCounter's Value is %d!\n",CallCounter);，在硬件上全速运行程序后收到:
CallCounter's Value is 1!

3、ISR范例.txt
--在硬件上全速运行程序后收到:
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
--在硬件上全速运行程序后收到:
Elapsed time in func1 = 993 us
Elapsed time in func1 = 4830 us

5、DMA范例.txt
--在SOPC Builder中建一个RAM型On-chip_memory命名为onchip_RAM_4K(也可取其它名)，建一个DMA命名为dma，将dma的read_master、write_master与onchip_RAM_4K连接.在硬件上全速运行程序后收到:
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驱动范例.txt
--在硬件上全速运行程序后收到:
Simple Flash Access Demo.
Open Flash Device Successfully.
Write Flash Device Successfully.
Read Flash Device Successfully.
Verify Successfully!

7、Fine-gained Flash Access驱动范例.txt
--在硬件上全速运行程序后收到:
Fine-gained Flash Access Demo.
Open Flash Device Successfully.
Erase Flash Device Successfully.
Write Flash Device Successfully.
Read Flash Device Successfully.
Verify Successfully!

Alarm范例程序经过修改之后，可以看到重复进my_alarm_callback()函数了
控制台显示结果为:
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演示代码修改版.
* 
* 二、相关说明：
*    由于NiosII IDE的ISS(Instruction Set Simulation)支持JTAG_UART和定时
*    器的仿真功能,所以该源码可以运行在ISS模式下,而无须任何硬件开发板的支持.
* 
* 三、运行前提:
*    1. 选择包含JTAG_UART和具有周期中断功能的定时器的NiosII系统(ptf文件);
*    2. 在系统库属性中完成下面的配置:
*        (1) 将stdout映射到JTAG_UART;
*        (2) 将具有周期中断功能的定时器映射为系统时钟;
* 
*/
#include <stdio.h>
#include "sys/alt_alarm.h"
#include "alt_types.h"

//定义my_alarm_callback函数的重复调用周期
//INTEVAL_TICK不能太大,因为ISS对定时器的仿真需要很长的时间,这里取1即可
//在SOPC Builder中对定时器周期的设定也不要太大,1ms即可
#define INTEVAL_TICK 1 //单位:系统时钟周期

//定义全局静态变量对my_alarm_callback的被调用次数进行计数;
static int CalledCounter = 0;
/* 定义欲注册为Alarm的callback函数; */
alt_u32 my_alarm_callback (void* context)
{
  CalledCounter++;

  //返回值决定在返回后的多少个系统时钟周期后,my_alarm_callback函数再次被调用;
  return INTEVAL_TICK;
}

int main()
{
  //在注册alarm之前,必须先定义一个alt_alarm类型的变量(无须初始化),
  //并将它作为alarm注册函数alt_alarm_start的输入参数;
  static alt_alarm alarm;
  //当alt_alarm_start注册成功时返回0,否则返回负数;
  if(  
      alt_alarm_start(&alarm,
                      INTEVAL_TICK,
                      my_alarm_callback,
                      NULL
                      ) < 0
    )
    {
      printf ("No system clock available\n" ) ;
    }
    
  //将my_alarm_callback的被调用次数由stdout设备输出          
  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);
    }
  }  
}