Nios ii--Experiment 3--led 100M software section

Software development

Referring to experiment two (LED), this experiment and experiment two (LED) difference is that the system clock from 50M to become 100M. Run the result, output hello from Nios ii! in the Debug window, and the four LED lights on the board flow display, indicating the test was successful! This experiment confirmed that the board support Operation frequency is high enough to reach 100M.

Experiment Code

/* * "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 are ~69 Kbytes by default * Using the standard reference design. * * For a reduced footprint version of the This template, and the explanation of how * To reduce the memory footprint-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; }

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Nios ii--Experiment 3--led 100M software section