start to write infrared_sensor

project/module/infrared_sensor/infrared_sensor.c

@@ -13,19 +13,40 @@
 
 #include "infrared_sensor.def.h"
 
+static unsigned int infrared_sensor_in_1 = 2;
+static unsigned int infrared_sensor_in_2 = 3;
+static unsigned int infrared_sensor_in_3 = 4;
+static unsigned int infrared_sensor_in_4 = 17; 
 
-static int black_white_open(struct inode devfile, struct file *instance) 
+
+static int infrared_sensor_open(struct inode devfile, struct file *instance) 
 {
+	int err;
+
+	err = gpio_request(infrared_sensor_in_1, "rpi-gpio-1");
+	if (err) {
+		printk("gpio_request failed %d\n", err);
+		return -1;
+	}
+	err = gpio_direction_output(infrared_sensor_in_1);
+	if (err) {
+		printk("gpio_direction_input failed %d\n", err);
+		gpio_free(infrared_sensor_in_1);
+		return -1;
+	}
+	printk("gpio 2 successfull configured\n");
+
+
 
 }
 
-static ssize_t black_white_read( struct file *instance, char __user *buffer,
+static ssize_t infrared_sensor_read( struct file *instance, char __user *buffer,
 							size_t max_bytes_to_read, loff_t *offset)
 {
 
 }
 
-static int black_white_close( struct inode devfile, struct file *instance)
+static int infrared_sensor_close( struct inode devfile, struct file *instance)
 {
 	
 }
@@ -33,89 +54,9 @@ static int black_white_close( struct inode devfile, struct file *instance)
 
 static struct file_operations fops = {
 	.owner = THIS_MODULE,
-	.open = black_white_open,
+	.open = infrared_sensor_open,
-	.release = black_white_close,
+	.release = infrared_sensor_close,
-	.read = black_white_read,
+	.read = infrared_sensor_read,
 };
 
-MODULE_AUTHOR("Manuel Vögele, Siegfried Kienzle, Simon Wörner");
+#include "infrared_sensor.h";
-MODULE_DESCRIPTION(DEVICE_NAME "driver");
-MODULE_LICENSE("GPL");
-
-static int __init ModInit(void)
-{
-    unsigned int i = 0;
-
-    printk(KERN_DEBUG DEVICE_NAME ": init");
-
-    if (alloc_chrdev_region(&devno, 0, NUMBER_OF_MINOR_DEVICE, DEVICE_NAME) < 0)
-        return -EIO;
-
-    cdev_init(&chardev, &fops);
-    chardev.owner = THIS_MODULE;
-    chardev.ops = &fops;
-
-    if (cdev_add(&chardev, devno, NUMBER_OF_MINOR_DEVICE)) {
-        pr_err(DEVICE_NAME ": cdev_add failed.");
-        goto free_device_number;
-    }
-
-    chardev_class = class_create(THIS_MODULE, DEVICE_NAME);
-
-    if (IS_ERR(chardev_class)) {
-        pr_err(DEVICE_NAME ": no udev support\n");
-        goto free_cdev;
-    }
-
-    for (i = 0; i < NUMBER_OF_MINOR_DEVICE; ++i)
-    {
-#if NUMBER_OF_MINOR_DEVICE == 1
-        chardev_device[i] = device_create(chardev_class, NULL, devno + i, NULL, DEVICE_NAME);
-#else
-        chardev_device[i] = device_create(chardev_class, NULL, devno + i, NULL, DEVICE_NAME "%d", i);
-#endif
-
-        if (IS_ERR(chardev_device[i])) {
-            pr_err(DEVICE_NAME ": device create failed\n");
-            goto free_device;
-        }
-    }
-
-#ifdef CUSTOM_INIT
-    CUSTOM_INIT
-#endif
-
-    return 0;
-
-free_device:
-    for (; i > 0; --i) {
-        device_destroy(chardev_class, devno + i - 1);
-    }
-    class_destroy(chardev_class);
-free_cdev:
-    cdev_del(&chardev);
-free_device_number:
-    unregister_chrdev_region(devno, NUMBER_OF_MINOR_DEVICE);
-    return -EIO;
-}
-
-static void __exit ModExit(void)
-{
-    unsigned int i = 0;
-
-    printk(KERN_DEBUG DEVICE_NAME ": exit");
-
-#ifdef CUSTOM_EXIT
-    CUSTOM_EXIT
-#endif
-
-    for (i = NUMBER_OF_MINOR_DEVICE; i > 0; --i) {
-        device_destroy(chardev_class, devno + i - 1);
-    }
-    class_destroy(chardev_class);
-    cdev_del(&chardev);
-    unregister_chrdev_region(devno, NUMBER_OF_MINOR_DEVICE);
-}
-
-module_init( ModInit );
-module_exit( ModExit );

project/module/infrared_sensor/infrared_sensor.h

@@ -0,0 +1,82 @@
+MODULE_AUTHOR("Manuel Vögele, Siegfried Kienzle, Simon Wörner");
+MODULE_DESCRIPTION(DEVICE_NAME "driver");
+MODULE_LICENSE("GPL");
+
+static int __init ModInit(void)
+{
+
+    unsigned int i = 0;
+
+    printk(KERN_DEBUG DEVICE_NAME ": init");
+
+    if (alloc_chrdev_region(&devno, 0, NUMBER_OF_MINOR_DEVICE, DEVICE_NAME) < 0)
+        return -EIO;
+
+    cdev_init(&chardev, &fops);
+    chardev.owner = THIS_MODULE;
+    chardev.ops = &fops;
+
+    if (cdev_add(&chardev, devno, NUMBER_OF_MINOR_DEVICE)) {
+        pr_err(DEVICE_NAME ": cdev_add failed.");
+        goto free_device_number;
+    }
+
+    chardev_class = class_create(THIS_MODULE, DEVICE_NAME);
+
+    if (IS_ERR(chardev_class)) {
+        pr_err(DEVICE_NAME ": no udev support\n");
+        goto free_cdev;
+    }
+
+    for (i = 0; i < NUMBER_OF_MINOR_DEVICE; ++i)
+    {
+#if NUMBER_OF_MINOR_DEVICE == 1
+        chardev_device[i] = device_create(chardev_class, NULL, devno + i, NULL, DEVICE_NAME);
+#else
+        chardev_device[i] = device_create(chardev_class, NULL, devno + i, NULL, DEVICE_NAME "%d", i);
+#endif
+
+        if (IS_ERR(chardev_device[i])) {
+            pr_err(DEVICE_NAME ": device create failed\n");
+            goto free_device;
+        }
+    }
+
+#ifdef CUSTOM_INIT
+    CUSTOM_INIT
+#endif
+
+    return 0;
+
+free_device:
+    for (; i > 0; --i) {
+        device_destroy(chardev_class, devno + i - 1);
+    }
+    class_destroy(chardev_class);
+free_cdev:
+    cdev_del(&chardev);
+free_device_number:
+    unregister_chrdev_region(devno, NUMBER_OF_MINOR_DEVICE);
+    return -EIO;
+}
+
+static void __exit ModExit(void)
+{
+    unsigned int i = 0;
+
+    printk(KERN_DEBUG DEVICE_NAME ": exit");
+
+#ifdef CUSTOM_EXIT
+    CUSTOM_EXIT
+#endif
+
+    for (i = NUMBER_OF_MINOR_DEVICE; i > 0; --i) {
+        device_destroy(chardev_class, devno + i - 1);
+    }
+    class_destroy(chardev_class);
+    cdev_del(&chardev);
+    unregister_chrdev_region(devno, NUMBER_OF_MINOR_DEVICE);
+}
+
+module_init( ModInit );
+module_exit( ModExit );