模块编程（二）

本程序是用模块写的使八段数码管显示从0－F（已在LPC3250开发板上运行过）
程序源代码：
#include
#include
#include
#include
#include

#define p3_out  (*(volatile unsigned long *) io_p2v(0x40028004))
#define p3_clr  *(volatile unsigned long *) io_p2v(0x40028008)
#define p3_state *(volatile unsigned long *) io_p2v(0x4002800c)

unsigned long num[16]={
/*下面这些数字与你连接的引脚有关，你连接了哪个引脚就用哪个*/
(1<<14|1<<17|1<<20|1<<19|1<<7|1<<6),
(1<<17|1<<20),
(1<<14|1<<17|1<<19|1<<7|1<<5),
(1<<14|1<<17|1<<20|1<<19|1<<5),
(1<<17|1<<20|1<<6|1<<5),
(1<<14|1<<20|1<<19|1<<6|1<<5),
(1<<14|1<<20|1<<19|1<<7|1<<6|1<<5),
(1<<14|1<<17|1<<20),
(1<<14|1<<17|1<<20|1<<19|1<<7|1<<6|1<<5),
(1<<14|1<<17|1<<20|1<<19|1<<6|1<<5),
(1<<14|1<<17|1<<20|1<<7|1<<6|1<<5),
(1<<20|1<<19|1<<7|1<<6|1<<5),
(1<<14|1<<19|1<<7|1<<6),
(1<<17|1<<20|1<<19|1<<7|1<<5),
(1<<14|1<<19|1<<7|1<<6|1<<5),
(1<<14|1<<7|1<<6|1<<5)};
static int numled(void)
{
   int i;
   p3_out |=(1<<14|1<<17|1<<20|1<<19|1<<7|1<<6|1<<5);
        /*循环16次，显示0－F*/
        for(i=0;i<16;i++)
        {
          p3_clr |= num[i];
      printk("***************");
          mdelay(1000);
          p3_out |=(1<<14|1<<17|1<<20|1<<19|1<<7|1<<6|1<<5);
          
        }
   return 0;
}

static __init int numled_init(void)
{
   printk("numled init\n");
   numled();
   return 0;
}
static __exit void numled_exit(void)
{
 printk("numled exit\n");
 return ;
}
module_init(numled_init);
module_exit(numled_exit);
MODULE_LICENSE("GPL");
本程序还是在hello模块的基础上，在模块的初始化时调用了一个函数而已。