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"); while(1) { for( i=0; i<4; i++) { IOWR_ALTERA_AVALON_PIO_DATA( LED_PIO_BASE,1<<i ); usleep(1000000);//each one 0.5s delay } } return0; } |
大西瓜FPGA-->https://daxiguafpga.taobao.com
博客资料、代码、图片、文字等属大西瓜FPGA所有,切勿用于商业! 若引用资料、代码、图片、文字等等请注明出处,谢谢!
每日推送不同科技解读,原创深耕解读当下科技,敬请关注微信公众号“科乎”。