// MCU BASIC: https://www.basic4mcu.com
// DateTime : 2018-12-11 오후 10:57:03
// by Ok-Hyun Park
//
#include <reg51.h>
//교통신호는 시계방향으로 북 동 남 서
//        east|north
//P1=G  G좌  Y   R|G   G좌  Y   R
//P1=1.7 1.6 1.5 1.4|1.3 1.2 1.1 1.0
//        west|south
//P3=G  G좌  Y   R|G   G좌  Y   R
//P3=3.7 3.6 3.5 3.4|3.3 3.2 3.1 3.0
//보행자신호는 시계방향으로 동 남 서 북
//P2=SW_N SW_N SW_N SW_N|w_m  s_m  e_m  n_m
//P2=2.7  2.6  2.5  2.4|2.3  2.2  2.1  2.0
//보행자 신호에 사용될 세그먼트는 4511ic를 사용했습니다.
//동작은 보행자 신호 led와 같이 동작합니다.
// Latch_N,S,W,E|4511 A B C D
//P0=N   W   S   E|D   C   B   A
//P0=0.7 0.6 0.5 0.4|0.3 0.2 0.1 0.0
sbit Latch_E=P0^4; // 4511 동쪽 Latch
sbit Latch_S=P0^5; // 4511 남쪽 Latch
sbit Latch_W=P0^6; // 4511 서쪽 Latch
sbit Latch_N=P0^7; // 4511 북쪽 Latch
//
void delay(unsigned int ms){
  unsigned int i,j;
  for(i=1; i<=ms; i++)for(j=1; j<=125; j++);
}
//
void east_walk(void){ //동쪽 보행자 신호 LED 깜빡임 및 세그먼트 설정
  signed char number,temp;
  P0=0xFF; Latch_W=0; Latch_W=1;
  P0=0xFF; Latch_S=0; Latch_S=1;
  P0=0xFF; Latch_N=0; Latch_N=1;
  for(number=9; number>=0; number--){
    temp=(number&0x0F)|0xF0;
    P2=0x0e; P0=temp; Latch_E=0; Latch_E=1; delay(500);
    P2=0x0f; P0=temp; Latch_E=0; Latch_E=1; delay(500);
  }
  P0=0xFF; Latch_E=0; Latch_E=1;
}
//
void south_walk(void){ //남쪽 보행자 신호 LED 깜빡임 및 세그먼트 설정
  signed char number,temp;
  P0=0xFF; Latch_E=0; Latch_E=1;
  P0=0xFF; Latch_W=0; Latch_W=1;
  P0=0xFF; Latch_N=0; Latch_N=1;
  for(number=9; number>=0; number--){
    temp=(number&0x0F)|0xF0;
    P2=0x0d; P0=temp; Latch_S=0; Latch_S=1; delay(500);
    P2=0x0f; P0=temp; Latch_S=0; Latch_S=1; delay(500);
  }
  P0=0xFF; Latch_S=0; Latch_S=1;
}
//
void west_walk(void){ //서쪽 보행자 신호 LED 깜빡임 및 세그먼트 설정
  signed char number,temp;
  P0=0xFF; Latch_E=0; Latch_E=1;
  P0=0xFF; Latch_S=0; Latch_S=1;
  P0=0xFF; Latch_N=0; Latch_N=1;
  for(number=9; number>=0; number--){
    temp=(number&0x0F)|0xF0;
    P2=0x0b; P0=temp; Latch_W=0; Latch_W=1; delay(500);
    P2=0x0f; P0=temp; Latch_W=0; Latch_W=1; delay(500);
  }
  P0=0xFF; Latch_W=0; Latch_W=1;
}
//
void north_walk(void){ //북쪽 보행자 신호 LED 깜빡임 및 세그먼트 설정
  signed char number,temp;
  P0=0xFF; Latch_E=0; Latch_E=1;
  P0=0xFF; Latch_S=0; Latch_S=1;
  P0=0xFF; Latch_W=0; Latch_W=1;
  for(number=9; number>=0; number--){
    temp=(number&0x0F)|0xF0;
    P2=0x07; P0=temp; Latch_N=0; Latch_N=1; delay(500);
    P2=0x0f; P0=temp; Latch_N=0; Latch_N=1; delay(500);
  }
  P0=0xFF; Latch_N=0; Latch_N=1;
}
//
void main(void){
  do{
    P1=0xe7; P3=0xee; east_walk(); // 북쪽 녹색 직진 // 동,남,서 적색 
    P1=0xed; P3=0xee; P2=0x0f;     // 북쪽 황색 대기 // 동,남,서 적색 // 동쪽 보행자 적색
    delay(2000);
    P1=0x7e; P3=0xee; south_walk(); // 동쪽 녹색 직진 // 북,남,서 적색 
    P1=0xde; P3=0xee; P2=0x0f;      // 동쪽 황색 대기 // 북,남,서 적색 // 남쪽 보행자 적색
    delay(2000);
    P1=0xee; P3=0xe7; west_walk(); // 서쪽 녹색 직진 // 동,북,남 적색 
    P1=0xee; P3=0xed; P2=0x0f;     // 서쪽 황색 대기 // 동,북.남 적색 // 서쪽 보행자 적색 
    delay(2000);
    P1=0xee; P3=0x7e; north_walk(); // 남쪽 녹색 직진 // 동,북,서 적색 
    P1=0xee; P3=0xde; P2=0x0f;      // 남쪽 황색 대기 // 동,북,서 적색 // 북쪽 보행자 적색 
    delay(2000);
  } while(1);
}
 
스위치 코드와 좌회전 코드는 아직 안 만들었나보죠?
 
 
void main(void){
  do{
    P1=0xe7; P3=0xee; east_walk(); // 북쪽 녹색 직진 // 동,남,서 적색 
    P1=0xed; P3=0xee; P2=0x0f;     // 북쪽 황색 대기 // 동,남,서 적색 // 동쪽 보행자 적색
    for(i=0;i<20;i++){ delay(100); sw_check(); } // 딜레이 동안에 스위치를 체크
    if(북쪽 좌회전?){
      북쪽 좌회전
    }
    P1=0x7e; P3=0xee; south_walk(); // 동쪽 녹색 직진 // 북,남,서 적색 
    P1=0xde; P3=0xee; P2=0x0f;      // 동쪽 황색 대기 // 북,남,서 적색 // 남쪽 보행자 적색
    for(i=0;i<20;i++){ delay(100); sw_check(); } // 딜레이 동안에 스위치를 체크
    if(동쪽 좌회전?){
      동쪽 좌회전
    }
    P1=0xee; P3=0xe7; west_walk(); // 서쪽 녹색 직진 // 동,북,남 적색 
    P1=0xee; P3=0xed; P2=0x0f;     // 서쪽 황색 대기 // 동,북.남 적색 // 서쪽 보행자 적색 
    for(i=0;i<20;i++){ delay(100); sw_check(); } // 딜레이 동안에 스위치를 체크
    if(서쪽 좌회전?){
      서쪽 좌회전
    }
    P1=0xee; P3=0x7e; north_walk(); // 남쪽 녹색 직진 // 동,북,서 적색 
    P1=0xee; P3=0xde; P2=0x0f;      // 남쪽 황색 대기 // 동,북,서 적색 // 북쪽 보행자 적색 
    for(i=0;i<20;i++){ delay(100); sw_check(); } // 딜레이 동안에 스위치를 체크
    if(남쪽 좌회전?){
      남쪽 좌회전
    }
  } while(1);
}