hello_world_small.c

参加今年的比赛肯定要用的。谢谢支持。祝大家好运！

/* 
 * "Small 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 requires a STDOUT  device in your system's hardware. 
 *
 * The purpose of this example is to demonstrate the smallest possible Hello 
 * World application, using the Nios II HAL library.  The memory footprint
 * of this hosted application is ~3124 bytes by default using the standard 
 * reference design.  For a more fully featured Hello World application
 * example, see the example titled "Hello World".
 *
 * The memory footprint of this example has been reduced by making the
 * following changes to the normal "Hello World" example.
 * Check in the Nios II Software Developers Manual for a more complete 
 * description.
 * 
 * In the SW Application project (small_hello_world):
 *
 *  - In the C/C++ Build page
 * 
 *    - Set the Optimization Level to -Os
 * 
 * In System Library project (small_hello_world_syslib):
 *  - In the C/C++ Build page
 * 
 *    - Set the Optimization Level to -Os
 * 
 *    - Define the preprocessor option ALT_NO_INSTRUCTION_EMULATION 
 *      This removes software exception handling, which means that you cannot 
 *      run code compiled for Nios II cpu with a hardware multiplier on a core 
 *      without a the multiply unit. Check the Nios II Software Developers 
 *      Manual for more details.
 *
 *  - In the System Library page:
 *    - Set Periodic system timer and Timestamp timer to none
 *      This prevents the automatic inclusion of the timer driver.
 *
 *    - Set Max file descriptors to 4
 *      This reduces the size of the file handle pool.
 *
 *    - Uncheck Clean exit (flush buffers)
 *      This removes the call to exit, and when main is exitted instead of 
 *      calling exit the software will just spin in a loop.
 *
 *    - Check Small C library
 *      This uses a reduced functionality C library, which lacks  
 *      support for buffering, file IO, floating point and getch(), etc. 
 *      Check the Nios II Software Developers Manual for a complete list.
 *
 *    - Check Reduced device drivers
 *      This uses reduced functionality drivers if they're available. For the
 *      standard design this means you get polled UART and JTAG UART drivers,
 *      no support for the LCD driver and you lose the ability to program 
 *      CFI compliant flash devices.
 *
 *      
 *
 */

#include <stdio.h>

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

  return 0;
}