Zobrazení zdroje stránky Ovládání motoru s H můstkem

{|

| 
<source lang="asm">
CODE:
L293D_A   equ P2.0          ;L293D A - Positive of Motor
L293D_B   equ P2.1          ;L293D B - Negative of Motor
L293D_E   equ P2.2          ;L293D E - Enable pin of IC

         org 0H
Main:
         acall rotate_f     ;Rotate motor forward
         acall delay        ;Let the motor rotate
         acall break        ;Stop the motor
         acall delay        ;Wait for some time
         acall rotate_b     ;Rotate motor backward
         acall delay        ;Let the motor rotate
         acall break        ;Stop the motor
         acall delay        ;Wait for some time
         sjmp  Main         ;Do this in loop
                 
rotate_f:
         setb  L293D_A      ;Make Positive of motor 1
         clr   L293D_B      ;Make negative of motor 0
         setb  L293D_E      ;Enable to run the motor
         ret                ;Return from routine
         
rotate_b:
         clr   L293D_A      ;Make positive of motor 0
         setb  L293D_B      ;Make negative of motor 1
         setb  L293D_E      ;Enable to run the motor
         ret                ;Return from routine
         
break:
         clr   L293D_A      ;Make Positive of motor 0
         clr   L293D_B      ;Make negative of motor 0
         clr   L293D_E      ;Disable the o/p
         ret                ;Return from routine
         
delay:                      ;Some Delay
         mov   r7,#20H
back:    mov   r6,#FFH
back1:   mov   r5,#FFH
here:    djnz  r5, here
         djnz  r6, back1
         djnz  r7, back
         ret
 

</source>
|
<source lang="C">
►C programming
CODE:
#include #define L293D_A P2_0         //Positive of motor
#define L293D_B P2_1         //Negative of motor
#define L293D_E P2_2         //Enable of L293D

// Function Prototypes
void rotate_f(void);         //Forward run funtion
void rotate_b(void);         //Backward run function
void breaks(void);           //Motor stop function
void delay(void);            //Some delay

void main(){                 //Our main function
    while(1){                //Infinite loop
                rotate_f();          //Run forward
                delay();             //Some delay
                breaks();            //Stop
                delay();             //Some delay
                rotate_b();          //Run Backwards
                delay();             //Some delay
                breaks();            //Stop
                delay();             //Some delay
        }                        //Do this infinitely
}

void rotate_f(){
        L293D_A = 1;             //Make positive of motor 1
        L293D_B = 0;             //Make negative of motor 0
        L293D_E = 1;             //Enable L293D
}

void rotate_b(){
        L293D_A = 0;             //Make positive of motor 0
        L293D_B = 1;             //Make negative of motor 1
        L293D_E = 1;             //Enable L293D
}

void breaks(){
        L293D_A = 0;             //Make positive of motor 0
        L293D_B = 0;             //Make negative of motor 0
        L293D_E = 0;             //Disable L293D
}

void delay(){                //Some delay...
    unsigned char i,j,k;
    for(i=0;i<0x20;i++)
        for(j=0;j<255;j++)
                for(k=0;k<255;k++);

</source>
|}


source www: http://laros-edu.net/index.php?pilih=news&mod=yes&aksi=lihat&id=48