[Kernel Porting-4] H-Smart4412 LED 점멸하기

작업 환경

-메인 OS : Windows 8.1K(Intel Core i5-4590)

-작업 OS : Ubuntu 14.04 64bit(VirtualBox)

-장 비 명 : H-Smart4412

 

1. led.c - LED 점멸하기

#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <fcntl.h> #include <sys/types.h> #include <sys/ioctl.h> #include <sys/stat.h>   #define led "/dev/led"   int main() {     int dev, i;     unsigned char data;       if((dev = open(led, O_RDWR)) < 0)     {         printf("Can't Open\n");         exit(0);     }       for(i=0;i<8;i++)     {         if(i%2)         {             data = 0xff;         }         else         {             data = 0x00;         }         write(dev,&data,sizeof(unsigned char));     }     close(dev);         return 0; }

 

2. led2.c - LED 순차점등, 순차점멸 등

#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <fcntl.h> #include <sys/types.h> #include <sys/ioctl.h> #include <sys/stat.h> #define led "/dev/led"   void led_up(int dev); void led_down(int dev); void led_all(int dev); void led_oe(int dev); void led_inside(int dev); void led_outside(int dev);   int main() {     int dev, sw = 0;     if((dev = open(led, O_RDWR)) < 0)     {         printf("Can't Open\n");         exit(0);     }       while(sw != 9)     {         printf("1. LED UP\n");         printf("2. LED DOWN\n");         printf("3. All\n");         printf("4. OddEven\n");         printf("5. Inside\n");         printf("6. Outside\n");         printf("9. exit\n");         scanf("%d",&sw);                 switch(sw)         {             case 1: led_up(dev);                      break;             case 2: led_down(dev);                      break;             case 3: led_all(dev);                      break;             case 4: led_oe(dev);                      break;             case 5: led_inside(dev);                      break;             case 6: led_outside(dev);                      break;         }     }     close(dev);     return 0; }   void led_up(int dev) {     int i;     unsigned char data=0x00;       write(dev,&data,sizeof(unsigned char));     data = 1;       for(i=0;i<8;i++)     {         data = data>>1;         data |= 0x80;         write(dev,&data,sizeof(unsigned char));         usleep(50000);     }       for(i=0;i<8;i++)     {         data = data>>1;         write(dev,&data,sizeof(unsigned char));         usleep(50000);     } }   void led_down(int dev) {     int i;     unsigned char data=0x00;       write(dev,&data,sizeof(unsigned char));     data = 1;       for(i=0;i<8;i++)     {         write(dev,&data,sizeof(unsigned char));         data = data<<1;         data |= 1;         usleep(50000);     }       for(i=0;i<8;i++)     {         write(dev,&data,sizeof(unsigned char));         data = data<<1;         usleep(50000);     }     write(dev,&data,sizeof(unsigned char)); }   void led_all(int dev) {     int i;     unsigned char data=0x00;       for(i=0;i<16;i++)     {         data = ~data;         write(dev,&data,sizeof(unsigned char));         usleep(100000);     } }   void led_oe(int dev) {     int i;     unsigned char data=0xAA;       for(i=0;i<16;i++)     {         data = ~data;         write(dev,&data,sizeof(unsigned char));         usleep(100000);     } }   void led_inside(int dev) {     int i;     unsigned char data=0x00;         for(i=0;i<4;i++)     {         data |= 1<<i;         data |= 0x80>>i;         write(dev,&data,sizeof(unsigned char));         usleep(100000);     }       for(i=0;i<4;i++)     {         data &= ~(1<<i);         data &= ~(0x80>>i);         write(dev,&data,sizeof(unsigned char));         usleep(100000);     } }   void led_outside(int dev) {     int i;     unsigned char data=0x00;         for(i=0;i<4;i++)     {         data |= 1<<i+4;         data |= 0x80>>i+4;         write(dev,&data,sizeof(unsigned char));         usleep(100000);     }       for(i=0;i<4;i++)     {         data &= ~(1<<i+4);         data &= ~(0x80>>i+4);         write(dev,&data,sizeof(unsigned char));         usleep(100000);     } }