tiny6410 按鍵中斷驅動 poll機制

驅動程式key_drv_int.c

#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define s3c6410_gpncon_pa 	(0x7f008830)

#define s3c6410_gpndat_pa (0x7f008834)
#define s3c6410_gpnpud_pa (0x7f008838)
#define s3c6410_gplcon0_pa (0x7f008810)
#define s3c6410_gplcon1_pa (0x7f008814)
#define s3c6410_gpldat_pa (0x7f008818)
#define s3c6410_gplpud_pa (0x7f00881c)
static volatile unsigned long* gpncon = null;
static volatile unsigned long* gpndat = null;
static volatile unsigned long* gplcon0 = null;
static volatile unsigned long* gplcon1 = null;
static volatile unsigned long* gpldat = null;
struct key_irq_desc;
static struct key_irq_desc key_irqs = , \
, \, \ 
, \, \
, \, \
};static volatile char key_values = ;
static int major = 0;
static struct class* key_drv_int_class;
static declare_wait_queue_head(key_waitq);
static volatile int ev_press = 0;
static irqreturn_t key_drv_irq(int irq, void* dev_id)
disable_irq(key_irqs[i].irq);
free_irq(key_irqs[i].irq, (void *)&key_irqs[i]);
} return -ebusy; } 
ev_press = 1;
/* set key(1~8) gpio pin = input */
// *gpncon &= ~((0x3<<0)|(0x3<<2)|(0x3<<4)|(0x3<<6)|(0x3<<8)|(0x3<<10)); /* set key1~key6 pin = input*/
// *gpncon |= ((0x0<<0)|(0x0<<2)|(0x0<<4)|(0x0<<6)|(0x0<<8)|(0x0<<10)); /* gpn0~gpn5 */
// *gplcon1 &= ~((0xf<<12)|(0xf<<16)); /* set key7~key8 pin = input*/
// *gplcon1 |= ((0x0<<12)|(0x0<<16)); /* gpl11~gpl12 */
return 0;
}static ssize_t key_drv_int_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
else
}ev_press = 0;
ret = copy_to_user(buf, &key_values, sizeof(key_values)makefile
kerneldir = /sdb/kernel/linux-2.6.38-tiny6410/linux-2.6.38/
pwd := $(shell pwd)
modules:
$(make) -c $(kerneldir) m=$(pwd) modules
clean:
rm -rf *.o *~ core .depend .*.cmd *.ko *.mod.c .tmp_versions
.phony: modules clean
obj-m := key_drv_int.o

#include #include #include #include #include #define device_name "/dev/key_drv_int"

int main(int argc, char* argv)
unsigned char key_values[8];
int ret;
struct pollfd fds[1];
fds[0].fd = fd;
fds[0].events = pollin;
for( ; ; )
else if(ret > 0)
else
}close(fd);
return 0;
}

#include #include #include #include //#include #include #include #define device_name "/dev/key_drv_int"

int main(int argc, char* argv)
unsigned char key_values[8];
int ret;
fd_set readset;
struct timeval timeout;
for( ; ; )
else if(ret < 0)
else if(fd_isset(fd, &readset))/*如果描述符集readset的fd位被設定*/
}close(fd);
return 0;
}

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