用单片机实现的交通灯设计

GREEN_A=1;

//east red leds on

RED_B=1;

YELLOW_B=1;

GREEN_B=0;

}

//south and north 7segments control function void South_North_7seg()

{

S1=0;

S2=0;

S3=0;

S4=0;

if(second_counts>0)

{

S3=1;

S4=0;

P1=seg7[second_counts/10];

Delay(2);

S3=0;

S4=1;