seat control Pi

led2/app.c

+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/sysmacros.h>
+#include <time.h>
+
+#define LED_MAJOR_NUMBER 507
+#define LED_MINOR_NUMBER 100
+#define LED_DEV_PATH_NAME  "/dev/led2_dev"
+
+
+#define IOCTL_MAGIC_NUMBER   '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)
+
+int main(){
+      dev_t led2_dev;
+      int fd;
+      int a=1;
+      int b=5;
+      led2_dev=makedev(LED_MAJOR_NUMBER, LED_MINOR_NUMBER);
+      mknod(LED_DEV_PATH_NAME, S_IFCHR|0666, led2_dev);
+      
+      fd=open(LED_DEV_PATH_NAME, O_RDWR);
+      
+      if(fd<0){
+         printf("fail to open led\n");
+         return -1;
+      }
+      
+      ioctl(fd, IOCTL_CMD_SET_DIRECTION, &a);
+      sleep(1);
+      ioctl(fd, IOCTL_CMD_SET_BLINK, &b);
+      sleep(1);
+      ioctl(fd, IOCTL_CMD_SET_OFF, &b);
+      close(fd);
+      
+      return 0;
+}

led2/led2_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 507
+#define LED_DEV_NAME "led2_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   '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)
+
+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;
+   *gpsel1 |= (1 << 24);
+   switch (cmd) {
+   case IOCTL_CMD_SET_DIRECTION:
+      copy_from_user(&kbuf, (const void*)arg, 4);
+      if (kbuf == 0) {
+         printk(KERN_ALERT "LED set direction in !!\n");
+         *gpsel1 |= (0 << 24);
+
+      }
+      else if (kbuf == 1) {
+         printk(KERN_ALERT "LED set direction out!!\n");
+         *gpsel1 |= (1 << 24);
+         //*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 << 18);
+      
+      break;
+   case IOCTL_CMD_SET_OFF:
+      *gpclr1 |= (1<<18);
+      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("led2_dev");
+

led2/led2_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, "8EA22616AAFFE91DFC17AFE");

led2/modules.order

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

led2/script.sh

+sudo rmmod led2_dev
+sudo rm /dev/led2_dev
+make
+sudo insmod led2_dev.ko
+sudo mknod -m 666 /dev/led2_dev c 502 0

sound/.sound_dev.ko.cmd

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

sound/.tmp_versions/sound_dev.mod

+/home/pi/Desktop/project/sound/sound_dev.ko
+/home/pi/Desktop/project/sound/sound_dev.o
+

sound/Makefile

+KERNEL_DIR = /lib/modules/4.19.97-v7+/build
+
+obj-m := sound_dev.o
+
+PWD := $(shell pwd)
+
+all:
+	make -C $(KERNEL_DIR) M=$(PWD) modules
+
+clean:
+	make -C $(KERNEL_DIR) M=$(PWD) clean
+
+in:
+	sudo insmod sound_dev.ko
+   
+out:
+	sudo rmmod sound_dev
+
+in2:
+	sudo mknod -m 666 /dev/sound_dev c 502 0

sound/app.c

+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <math.h>
+#include <errno.h>
+#include <time.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
+
+int main() {
+   int sound_fd = open(SOUND_DEV_PATH, O_RDWR);
+   int sound_data = 0;
+
+   int led_fd, led2_fd;
+   int led_data, led2_data;
+
+   //led_fd = open(LED_DEV_PATH, O_RDONLY);
+   //led2_fd = open(LED2_DEV_PATH, O_RDONLY);
+
+   char config[3] = {0, };
+   int data[2] = {0, };
+   float result[2] = {0, };
+   char reg = 0x03;
+   if(sound_fd < 0) {
+      printf("fail to open SOUND sensor device\n");
+      return 1;
+   }
+   while(1){
+          read(sound_fd, &sound_data, sizeof(int));
+      printf("%d\n", sound_data);
+      sleep(1);
+      }
+   close(sound_fd);
+   //close(led_fd);
+   //close(led2_fd);
+
+   return 0;
+}

sound/modules.order

+kernel//home/pi/Desktop/project/sound/sound_dev.ko

sound/script.sh

+sudo rmmod sound_dev
+sudo rm /dev/sound_dev
+make
+sudo insmod sound_dev.ko
+sudo mknod -m 666 /dev/sound_dev c 502 0

sound/sound_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/uaccess.h>
+
+#define SOUND_MAJOR_NUMBER      502
+#define SOUND_DEV_NAME         "/dev/sound_dev"
+
+#define GPIO_BASE_ADDR      0x3F200000
+#define SPI_BASE_ADDR      0x3F204000
+
+#define GPFSEL0      0x00
+#define GPFSEL1      0x04
+#define SPI_CS      0x00
+#define SPI_FIFO   0x04
+
+static void __iomem *gpio_base;
+static void __iomem *spi_base;
+
+volatile unsigned int *gpfsel0, *gpfsel1;
+volatile unsigned int *spi_cs, *spi_fifo;
+
+int sound_open(struct inode *inode, struct file *filp){
+   printk(KERN_ALERT "sound detection sensor driver open!!\n");
+   
+   gpio_base = ioremap(GPIO_BASE_ADDR, 0xFF);
+   spi_base = ioremap(SPI_BASE_ADDR, 0xFF);
+   
+   gpfsel0 = (volatile unsigned int*)(gpio_base + GPFSEL0);
+   gpfsel1 = (volatile unsigned int*)(gpio_base + GPFSEL1);
+   spi_cs = (volatile unsigned int*)(spi_base + SPI_CS);
+   spi_fifo = (volatile unsigned int*)(spi_base + SPI_FIFO);
+ 
+   *gpfsel0 &= ~(0x1FF << 21);
+   *gpfsel0 |= (0x24 << 24);
+   *gpfsel1 &= ~(0x3F);   // 111111 = 0x3F
+   *gpfsel1 |= (0x24);      // 100100 = 0x24
+   
+   *spi_cs &= ~(0xFFFF);      // cs clear
+   
+   *spi_cs &= ~(0x01<<2);
+   *spi_cs &= ~(0x01<<3);      // spi(0,0)
+   *spi_cs |= (0x03<<4);      // clear FIFO
+ 
+   return 0;
+}
+   
+int sound_release(struct inode *inode, struct file *filp){
+   printk(KERN_ALERT "sound detection sensor driver closed!!\n");
+
+   *gpfsel0 &= ~(0x1FF << 21);
+   *gpfsel1 &= ~(0x3F);      // 111111 = 0x3F
+   *spi_cs &= ~(0xFFFF);      // cs clear
+   
+   iounmap((void*)gpio_base);
+   iounmap((void*)spi_base);
+   return 0;
+}
+
+ssize_t sound_read(struct file* flip, char* buf, size_t count, loff_t* f_pos){
+   printk(KERN_ALERT "read function called!!\n");
+   unsigned char spi_tData[3];
+   unsigned char spi_rData[3];
+   int tCount = 0; 
+   int rCount = 0;
+   
+   spi_tData[0] = 1;
+   spi_tData[1] = (0x08) << 4;
+   spi_tData[2] = 0;      // start single d2 d1 d0
+   
+   *spi_cs |= (0x03<<4);   // clear FIFO
+   
+   *spi_cs |= (0x01<<7);      // TA = 1
+   
+   while((tCount < 3) || (rCount < 3)){
+      while((*spi_cs & (1<<18)) && (tCount < 3)){
+         *spi_fifo = spi_tData[tCount];
+         tCount++;
+      }
+      while((*spi_cs & (1<<17)) && (rCount < 3)){
+         spi_rData[rCount] = *spi_fifo;
+         rCount++;
+      }   
+   }   
+   
+   while((!(*spi_cs)) & (1<<16));
+   
+   *spi_cs |= (0x03<<4);   // clear FIFO
+   *spi_cs &= ~(1<<7);      // TA = 0
+   
+   int data = ((spi_rData[1]&0x03)<<8) + spi_rData[2];
+   
+   printk(KERN_ALERT "reading input : %d \n", data);
+   
+   copy_to_user(buf, &data, sizeof(int));
+   
+   return count;
+}
+
+static struct file_operations sound_fops = {
+   .owner = THIS_MODULE,
+   .open = sound_open,
+   .release = sound_release,
+   .read = sound_read
+};
+
+int __init sound_init(void){
+   if(register_chrdev(SOUND_MAJOR_NUMBER, SOUND_DEV_NAME, &sound_fops) < 0)
+      printk(KERN_ALERT "sound detection sensor initialization failed!!\n");
+   else
+      printk(KERN_ALERT "sound detection sensor initialization success!!!\n");
+   return 0;
+}
+
+void __exit sound_exit(void){
+   unregister_chrdev(SOUND_MAJOR_NUMBER, SOUND_DEV_NAME);
+   printk(KERN_ALERT "sound detection sensor driver exit done!!!!");
+}
+
+module_init(sound_init);
+module_exit(sound_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("joreka");
+MODULE_DESCRIPTION("SOUND_DEV");
+
+   
+   
+   
+   
+   
+   
+   
+   
+