Cantafford
Member
Hello,
I'm trying to interface a DC motor with a LD239D full bridge driver using a PIC18F2580.
The truth table for the LD239D is(in my case):
Rc0 = 1; Rc1=0; => CW rotation
Rc0 = 0; Rc1=1; => CCW rotation
Rc0 = 0; Rc1=0; => motor stops
Rc0 = 1; Rc1=1; => motor stops
This is my schematic:
And this is the code:
I'm sure it's obvious however what I want to do is: basically when button 1 is pressed and the others are not motor will run CW, when button 2 is pressed and the others are not go CCW and when third one's pushed the motor shall stop regardless of what direction it's spinning.
The program worked fine if I added some delays instead of those ifs. When I use the if's however the RC0 and RC1 stay in 0 forever no matter what buttons I press. Obviously I'm missing something very simple but I just can't figure out what.
Any help will be appreciated. Thank you for reading!
I'm trying to interface a DC motor with a LD239D full bridge driver using a PIC18F2580.
The truth table for the LD239D is(in my case):
Rc0 = 1; Rc1=0; => CW rotation
Rc0 = 0; Rc1=1; => CCW rotation
Rc0 = 0; Rc1=0; => motor stops
Rc0 = 1; Rc1=1; => motor stops
This is my schematic:
And this is the code:
Code:
/*
* File: driver.c
* Author: me
*
* Created on October 23, 2015, 11:06 AM
*/
#include <stdio.h>
#include <stdlib.h>
#include "config.h"
void main()
{
OSCCON = 0x76; // set internal oscillator to 8Mhz
TRISA = 0b11111111; // portA as input(the switches)
TRISC = 0b11111100; // set portC as output(RC0 = in1, RC1 = in2)
while(1)
{
if(PORTAbits.RA0 == 0 && PORTAbits.RA1 == 1 && PORTAbits.RA2 == 1) // clockwise
{LATCbits.LATC0 = 1; LATCbits.LATC1 = 0;}
if(PORTAbits.RA0 == 1 && PORTAbits.RA1 == 0 && PORTAbits.RA2 == 1) // counter clockwise
{LATCbits.LATC0 = 0; LATCbits.LATC1 = 1;}
if(PORTAbits.RA2 == 0) // motor stops
{LATCbits.LATC0 = 0; LATCbits.LATC1 = 0;}
}
}I'm sure it's obvious however what I want to do is: basically when button 1 is pressed and the others are not motor will run CW, when button 2 is pressed and the others are not go CCW and when third one's pushed the motor shall stop regardless of what direction it's spinning.
The program worked fine if I added some delays instead of those ifs. When I use the if's however the RC0 and RC1 stay in 0 forever no matter what buttons I press. Obviously I'm missing something very simple but I just can't figure out what.
Any help will be appreciated. Thank you for reading!