seat control Pi

app.c

+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <math.h>
+#include <errno.h>
+
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/sysmacros.h>
+
+#define TEMP_DEV_PATH      "/dev/temp_dev"
+#define SOUND_DEV_PATH     "/dev/sound_dev"
+#define LED_DEV_PATH	   "/dev/led_dev"
+#define LED2_DEV_PATH      "/dev/led2_dev"
+#define INTERVAL      	   50000
+
+#define IOCTL_MAGIC_NUMBER   'K'
+
+#define IOCTL_MAGIC_NUMBER2   'J'
+
+#define IOCTL_CMD_SET_DIRECTION   _IOWR(IOCTL_MAGIC_NUMBER,0,int)
+#define IOCTL_CMD_SET_BLINK   _IOWR(IOCTL_MAGIC_NUMBER,1,int)
+#define IOCTL_CMD_SET_OFF   _IOWR(IOCTL_MAGIC_NUMBER,2,int)
+
+#define IOCTL_CMD_SET_DIRECTION2		_IOWR(IOCTL_MAGIC_NUMBER2, 0, int)
+#define IOCTL_CMD_SET_BLINK2		_IOWR(IOCTL_MAGIC_NUMBER2, 1, int)
+#define IOCTL_CMD_SET_OFF2		_IOWR(IOCTL_MAGIC_NUMBER2, 2, int)
+
+int main() {
+   int temp_fd = open(TEMP_DEV_PATH, O_RDWR);
+   int sound_fd = open(SOUND_DEV_PATH, O_RDWR);
+   int sound_data = 0;
+
+   int led_fd, led2_fd;
+   int led_data = 1, led2_data = 1;
+
+   led_fd = open(LED_DEV_PATH, O_RDONLY);
+   led2_fd = open(LED2_DEV_PATH, O_RDONLY);
+   
+   ioctl(led2_fd, IOCTL_CMD_SET_DIRECTION2, &led2_data);
+   ioctl(led_fd, IOCTL_CMD_SET_DIRECTION, &led_data);
+
+   char config[3] = {0, };
+   int data[2] = {0, };
+   float result[2] = {0, };
+   char reg = 0x03;
+   if(temp_fd < 0) {
+      printf("fail to open TEMP sensor device\n");
+      return 1;
+   }
+   config[0] = 0x02;
+   config[1] = 0x15;
+   config[2] = 0x40;
+
+   for(int i = 0; i < 3; i++) {
+      write(temp_fd, &config[i], 1);
+      sleep(1);
+   }
+   sleep(1);
+
+   int temp = 0, j = 0;
+   float cTemp = 0, fTemp = 0;
+   write(temp_fd, &reg, 1);
+   while(1) {
+      for(int i = 0; i < 2; i++) {
+         read(temp_fd, &(data[i]), 1);
+         sleep(1);
+      }
+      printf("%d %d\n", data[0], data[1]);
+   
+      temp = (data[0] * 256 + (data[1] & 0xFC)) / 4;
+      if(temp > 8191)
+      {
+         temp -= 16384;
+      }
+      cTemp = temp * 0.03125;
+      if(j == 0) {
+         result[0] = cTemp;
+         j++;
+      }
+      else{
+         if(result[0] != cTemp) {
+            j = 0;
+         }
+         else {
+            result[0] = cTemp;
+            j++;
+         }
+      }
+      printf("Temperature in Celsius is : %.2f C \n", cTemp);
+      if(cTemp > 50)
+         ioctl(led_fd, IOCTL_CMD_SET_BLINK2, &led_data);
+      else
+         ioctl(led_fd, IOCTL_CMD_SET_OFF2, &led_data);
+         
+      sleep(1);
+      
+      read(sound_fd, &sound_data, sizeof(int));
+      if(sound_data > 650)
+	      	ioctl(led2_fd, IOCTL_CMD_SET_BLINK2, &led2_data);
+      else
+         	ioctl(led2_fd, IOCTL_CMD_SET_OFF2, &led2_data);
+         
+      printf("data : %d\n", sound_data);
+      
+      sleep(1);
+   }
+   
+   close(temp_fd);
+   close(sound_fd);
+   close(led_fd);
+   close(led2_fd);
+
+   return 0;
+}

led/.led_dev.ko.cmd

+cmd_/home/pi/Desktop/project/led/led_dev.ko := ld -r  -EL -T ./scripts/module-common.lds -T ./arch/arm/kernel/module.lds  --build-id  -o /home/pi/Desktop/project/led/led_dev.ko /home/pi/Desktop/project/led/led_dev.o /home/pi/Desktop/project/led/led_dev.mod.o ;  true

led/.tmp_versions/led_dev.mod

+/home/pi/Desktop/project/led/led_dev.ko
+/home/pi/Desktop/project/led/led_dev.o
+

led/Makefile

+KERNEL_DIR = /lib/modules/4.19.97-v7+/build
+
+obj-m := led_dev.o
+
+PWD := $(shell pwd)
+
+all:
+	make -C $(KERNEL_DIR) M=$(PWD) modules
+
+clean:
+	make -C $(KERNEL_DIR) M=$(PWD) clean

led/led_dev.c

+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/uaccess.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+
+#include <asm/mach/map.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#define LED_MAJOR_NUMBER 506
+#define LED_DEV_NAME "led_dev"
+
+
+#define GPIO_BASE_ADDR 0x3F200000
+#define GPFSEL1 0x04
+#define GPFSEL2   0x08
+#define GPSET0 0x1C
+#define GPCLR0 0x28
+#define GPLEV0   0x34
+
+#define IOCTL_MAGIC_NUMBER   'K'
+
+#define IOCTL_CMD_SET_DIRECTION   _IOWR(IOCTL_MAGIC_NUMBER,0,int)
+#define IOCTL_CMD_SET_BLINK   _IOWR(IOCTL_MAGIC_NUMBER,1,int)
+#define IOCTL_CMD_SET_OFF   _IOWR(IOCTL_MAGIC_NUMBER,2,int)
+
+static char *buffer = NULL;
+static int buf2;
+static void __iomem *gpio_base;
+volatile unsigned int *gpsel1;
+volatile unsigned int *gpsel2;
+volatile unsigned int *gpset1;
+volatile unsigned int *gpclr1;
+volatile unsigned int *gplev0;
+
+int led_open(struct inode *inode, struct file *flip) {
+   printk(KERN_ALERT "LED driver open!!\n");
+
+   gpio_base = ioremap(GPIO_BASE_ADDR, 0x60);
+   gpsel1 = (volatile unsigned int *)(gpio_base + GPFSEL1);
+   gpsel2 = (volatile unsigned int *)(gpio_base + GPFSEL2);
+
+   gpset1 = (volatile unsigned int *)(gpio_base + GPSET0);
+   gpclr1 = (volatile unsigned int *)(gpio_base + GPCLR0);
+   gplev0 = (volatile unsigned int *)(gpio_base + GPLEV0);
+
+
+   return 0;
+}
+
+
+int led_release(struct inode *inode, struct file *flip) {
+   printk(KERN_ALERT "LED driver closed!!\n");
+
+   iounmap((void *)gpio_base);
+
+   return 0;
+}
+
+long led_ioctl(struct file *flip, unsigned int cmd, unsigned long arg) {
+   int kbuf = -1;
+   int i = 0;
+   *gpsel2 |= (1 << 3);
+   switch (cmd) {
+   case IOCTL_CMD_SET_DIRECTION:
+      copy_from_user(&kbuf, (const void*)arg, 4);
+      if (kbuf == 0) {
+         printk(KERN_ALERT "LED fffset direction in !!\n");
+         *gpsel2 |= (0 << 3);
+
+      }
+      else if (kbuf == 1) {
+         printk(KERN_ALERT "LED fffset direction out!!\n");
+         *gpsel2 |= (1 << 3);
+         //*gpsel2 |= (1 << 3);
+      }
+      else {
+         printk(KERN_ALERT "ERROR direction parameter error\n");
+         return -1;
+      }
+      break;
+
+   case IOCTL_CMD_SET_BLINK:
+      copy_from_user(&kbuf, (const void*)arg, 4);
+      *gpset1 |= (1 << 21);
+      
+      break;
+   case IOCTL_CMD_SET_OFF:
+      *gpclr1 |= (1<<21);
+      break;
+   }
+   return 0;
+}
+
+static struct file_operations led_fops = {
+   .owner = THIS_MODULE,
+   .open = led_open,
+   .release = led_release,
+   .unlocked_ioctl = led_ioctl
+};
+
+int __init led_init(void) {
+   if (register_chrdev(LED_MAJOR_NUMBER, LED_DEV_NAME, &led_fops) < 0)
+      printk(KERN_ALERT "LED driver initialization fail\n");
+   else {
+      printk(KERN_ALERT "LED driver intialization success\n");
+
+   }
+   //*gpsel1 |= (0 << 24);
+   return 0;
+}
+
+void __exit led_exit(void) {
+   unregister_chrdev(LED_MAJOR_NUMBER, LED_DEV_NAME);
+   printk(KERN_ALERT "LED driver exit doen\n");
+}
+
+module_init(led_init);
+module_exit(led_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("joreka");
+MODULE_DESCRIPTION("led_dev");
+

led/led_dev.mod.c

+#include <linux/build-salt.h>
+#include <linux/module.h>
+#include <linux/vermagic.h>
+#include <linux/compiler.h>
+
+BUILD_SALT;
+
+MODULE_INFO(vermagic, VERMAGIC_STRING);
+MODULE_INFO(name, KBUILD_MODNAME);
+
+__visible struct module __this_module
+__attribute__((section(".gnu.linkonce.this_module"))) = {
+	.name = KBUILD_MODNAME,
+	.init = init_module,
+#ifdef CONFIG_MODULE_UNLOAD
+	.exit = cleanup_module,
+#endif
+	.arch = MODULE_ARCH_INIT,
+};
+
+#ifdef CONFIG_RETPOLINE
+MODULE_INFO(retpoline, "Y");
+#endif
+
+static const struct modversion_info ____versions[]
+__used
+__attribute__((section("__versions"))) = {
+	{ 0xad1a7def, "module_layout" },
+	{ 0x6bc3fbc0, "__unregister_chrdev" },
+	{ 0xcfc78319, "__register_chrdev" },
+	{ 0xdb7305a1, "__stack_chk_fail" },
+	{ 0x5f754e5a, "memset" },
+	{ 0x28cc25db, "arm_copy_from_user" },
+	{ 0x8f678b07, "__stack_chk_guard" },
+	{ 0xedc03953, "iounmap" },
+	{ 0x2e5810c6, "__aeabi_unwind_cpp_pr1" },
+	{ 0xe97c4103, "ioremap" },
+	{ 0x7c32d0f0, "printk" },
+	{ 0xb1ad28e0, "__gnu_mcount_nc" },
+};
+
+static const char __module_depends[]
+__used
+__attribute__((section(".modinfo"))) =
+"depends=";
+
+
+MODULE_INFO(srcversion, "17A8925BC7B5F5A84F0A4C2");

led/modules.order

+kernel//home/pi/Desktop/project/led/led_dev.ko

led2/.led2_dev.ko.cmd

+cmd_/home/pi/Desktop/project/led2/led2_dev.ko := ld -r  -EL -T ./scripts/module-common.lds -T ./arch/arm/kernel/module.lds  --build-id  -o /home/pi/Desktop/project/led2/led2_dev.ko /home/pi/Desktop/project/led2/led2_dev.o /home/pi/Desktop/project/led2/led2_dev.mod.o ;  true

led2/.tmp_versions/led2_dev.mod

+/home/pi/Desktop/project/led2/led2_dev.ko
+/home/pi/Desktop/project/led2/led2_dev.o
+

led2/Makefile

+KERNEL_DIR = /lib/modules/4.19.97-v7+/build
+
+obj-m := led2_dev.o
+
+PWD := $(shell pwd)
+
+all:
+	make -C $(KERNEL_DIR) M=$(PWD) modules
+
+clean:
+	make -C $(KERNEL_DIR) M=$(PWD) clean