nios II--实验3——led 100M软件部分

软件开发

参照实验二（led），该实验与实验二（led）的不同之处在于系统的时钟由50M提成为100M。运行结果，在调试窗口输出Hello from Nios II!，并且板上的四个LED灯流动显示，表明测试成功！通过此实验证实，板子支持的运行频率足够高，可达到100M。

实验代码

/*

* "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 "system.h"

#include "altera_avalon_pio_regs.h"

#include <stdio.h>

#include <unistd.h>

int main()

{

int i;

printf("Hello from Nios II!\n");

)

{

; i++)

{

<<i );

);//each one 0.5s delay

}

}

;

}

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