# Include <Linux/fs. h>
# Include <Linux/module. h>
# Include <Linux/errno. h>
# Include <Linux/kernel. h>
# Include <Linux/init. h>
# Include <Linux/cdev. h>
# Include <Linux/ioport. h>
# Include <Linux/PCI. h>
# Include <ASM/uaccess. h>
# Include <ASM/IO. h> Static volatile unsigned long * gpfcon; // = (volatile unsigned long x) 0x56000050;
Static volatile unsigned long * gpfdat; // = (volatile unsigned long x) 0x56000054; Static struct timer_list led_timer; VoidLed_timer_function(Unsigned long data)
{
Static int cur_val = 0;
If (cur_val)
{
Cur_val = 0;
* Gpfdat & = ~ (1 <4 );
}
Else
{
Cur_val = 1;
* Gpfdat | = (1 <4 );
} Mod_timer(& Led_timer, jiffies + 50);/* 50*10 Ms = 500 ms = 0.5 s */
} Int led_timer_init (void)
{
Gpfcon = ioremap (0x56000050, 8);/* obtain the virtual address */
Gpfdat = gpfcon + 1; * Gpfcon & = ~ (0x3 <(4*2 ));
* Gpfcon | = (0x1 <(4*2 ));; Init_timer (& led_timer );
Led_timer.function = led_timer_function;
Led_timer.expires = jiffies + 50;
Add_timer (& led_timer );
} Void led_timer_exit (void)
{
Del_timer(& Led_timer );
Iounmap (gpfcon );
} Module_init (led_timer_init );
Module_exit (led_timer_exit ); Module_license ("GPL "); |
