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motor.c
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motor.c
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/*********************************************************************
*
* File :
* motor.c
*
* Date :
* 11/05/2014
*
* Contributors :
* TSAO, CHIA-CHENG <chiacheng.tsao@gmail.com> , From NTUT
*
*********************************************************************/
#include <wiringPi.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <errno.h>
#include <softPwm.h>
#include "motor.h"
#define L298N_ENA 0
#define L298N_ENB 2
#define L298N_IN1 1
#define L298N_IN2 4
#define L298N_IN3 5
#define L298N_IN4 6
int l298n_test (void)
{
int ena = L298N_ENA;
int enb = L298N_ENB;
int in1 = L298N_IN1;
int in2 = L298N_IN2;
int in3 = L298N_IN3;
int in4 = L298N_IN4;
if (wiringPiSetup() == -1)
exit (1);
printf ("Raspberry Pi SoftwarePWM HBridge Test\n");
softPwmCreate (ena, 0,255);
softPwmCreate (enb, 0,255);
pinMode (in1, OUTPUT);
pinMode (in2, OUTPUT);
pinMode (in3, OUTPUT);
pinMode (in4, OUTPUT);
for (;;)
{
printf ("Forward\n");
digitalWrite (in1, 1);
digitalWrite (in2, 0);
softPwmWrite (ena, 250);
digitalWrite (in3, 1);
digitalWrite (in4, 0);
softPwmWrite (enb, 250);
delay (1000);
printf ("Stop\n");
digitalWrite (in1, 1);
digitalWrite (in2, 0);
softPwmWrite (ena, 0);
digitalWrite (in3, 1);
digitalWrite (in4, 0);
softPwmWrite (enb, 0);
delay (250);
printf ("Reverse\n");
digitalWrite (in1, 0);
digitalWrite (in2, 1);
softPwmWrite (ena, 250);
digitalWrite (in3, 0);
digitalWrite (in4, 1);
softPwmWrite (enb, 250);
delay (1000);
printf ("Stop\n");
digitalWrite (in1, 1);
digitalWrite (in2, 0);
softPwmWrite (ena, 0);
digitalWrite (in3, 1);
digitalWrite (in4, 0);
softPwmWrite (enb, 0);
delay (250);
printf ("Right\n");
digitalWrite (in1, 0);
digitalWrite (in2, 1);
softPwmWrite (ena, 250);
digitalWrite (in3, 1);
digitalWrite (in4, 0);
softPwmWrite (enb, 250);
delay (1000);
printf ("Stop\n");
digitalWrite (in1, 1);
digitalWrite (in2, 0);
softPwmWrite (ena, 0);
digitalWrite (in3, 1);
digitalWrite (in4, 0);
softPwmWrite (enb, 0);
delay (250);
printf ("Left\n");
digitalWrite (in1, 1);
digitalWrite (in2, 0);
softPwmWrite (ena, 250);
digitalWrite (in3, 0);
digitalWrite (in4, 1);
softPwmWrite (enb, 250);
delay (1000);
printf ("Stop\n");
digitalWrite (in1, 1);
digitalWrite (in2, 0);
softPwmWrite (ena, 0);
digitalWrite (in3, 1);
digitalWrite (in4, 0);
softPwmWrite (enb, 0);
delay (1250);
}
return 0;
}
typedef struct _motor
{
int ena;
int enb;
int in1;
int in2;
int in3;
int in4;
}motor_t;
void motor_initialize(void)
{
//setreuid(geteuid(), getuid());
//seteuid(0);
if (wiringPiSetup() == -1)
exit (1);
softPwmCreate (L298N_ENA, 0,255);
softPwmCreate (L298N_ENB, 0,255);
pinMode (L298N_IN1, OUTPUT);
pinMode (L298N_IN2, OUTPUT);
pinMode (L298N_IN3, OUTPUT);
pinMode (L298N_IN4, OUTPUT);
}
void motor_update(m_ctrl_t mode, int pwm1, int pwm2)
{
pwm1 = abs(pwm1);
pwm2 = abs(pwm2);
switch(mode)
{
case M_FWD :
digitalWrite (L298N_IN1, 1);
digitalWrite (L298N_IN2, 0);
softPwmWrite (L298N_ENA, pwm1);
digitalWrite (L298N_IN3, 1);
digitalWrite (L298N_IN4, 0);
softPwmWrite (L298N_ENB, pwm2);
break;
case M_BWD :
digitalWrite (L298N_IN1, 0);
digitalWrite (L298N_IN2, 1);
softPwmWrite (L298N_ENA, pwm1);
digitalWrite (L298N_IN3, 0);
digitalWrite (L298N_IN4, 1);
softPwmWrite (L298N_ENB, pwm2);
break;
case M_TNL :
digitalWrite (L298N_IN1, 1);
digitalWrite (L298N_IN2, 0);
softPwmWrite (L298N_ENA, pwm1);
digitalWrite (L298N_IN3, 0);
digitalWrite (L298N_IN4, 1);
softPwmWrite (L298N_ENB, pwm2);
break;
case M_TNR :
digitalWrite (L298N_IN1, 0);
digitalWrite (L298N_IN2, 1);
softPwmWrite (L298N_ENA, pwm1);
digitalWrite (L298N_IN3, 1);
digitalWrite (L298N_IN4, 0);
softPwmWrite (L298N_ENB, pwm2);
break;
case M_BRK :
#if 0 /* Motor Off */
digitalWrite (L298N_IN1, 1);
digitalWrite (L298N_IN2, 0);
softPwmWrite (L298N_ENA, 0);
digitalWrite (L298N_IN3, 1);
digitalWrite (L298N_IN4, 0);
softPwmWrite (L298N_ENB, 0);
#else /* Motor Break */
digitalWrite (L298N_IN1, 1);
digitalWrite (L298N_IN2, 1);
softPwmWrite (L298N_ENA, 1);
digitalWrite (L298N_IN3, 1);
digitalWrite (L298N_IN4, 1);
softPwmWrite (L298N_ENB, 1);
#endif
break;
default :
break;
}
}