gpio.c

来自「Spartan3_virtualplatform_8_1」· C语言 代码 · 共 28 行

#include "xparameters.h"

void* gpio_main (void *param)
{
  volatile unsigned int *data_ptr;
  volatile unsigned int *tri_ptr;
  volatile unsigned int i;

  data_ptr = (unsigned int *) (XPAR_LEDS_8BIT_BASEADDR);
  tri_ptr  = (unsigned int *) (XPAR_LEDS_8BIT_BASEADDR + 4);

  print("GPIO Test\r\n");

  print("Sending values to GPIO...\r\n");

  *tri_ptr  = 0; // All outputs
  *data_ptr = 0;
  i = 0;

  while (*data_ptr < 0xff) {
    if (!(i % 100))
      *data_ptr = *data_ptr + 1;
    i++;
  }

  print("GPIO Test Done\r\n");
}