f05b8099478e001b1f47f7c69a081316

基于Nios II的串口通信

/*
 * "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 <stdio.h>
#include <excalibur.h>

int main(void)
{
  unsigned char c;
  int d;
  while ((c=nr_uart_rxchar(na_uart)) == -1);
  //从串口1接收字符
  if(c=0x55)
  nr_uart_txchar(0x33,0);
  //将0x33传给默认串口
  else
  c=c-Oxaa;
  d=int(c/2);
  nr_uart_txchar(d,0);
  //将计算后的数据传给默认串口
}