Hello...I have been programming for a while now, but I am nowhere near perfect. I just got a Ford expedition dashboard at the local flea market. I bought it figuring I could use it in conjunction with American trucking simulator. I got all of the dash lights to work with the game and that's out of the way. Now I'm moving on to the gauges. Has anyone had experience with car stepper motors? I got 10 A4988 stepper motor driver boards for all the motors on the back. The stepper motors on the back have 4 pins. I am using Silas Parker's code and plugin for this. He used servos instead...but I want to use the steppers that are already on the dash.
Here is Silas Parker's website:
Here is an instructable showing the board and coding: https://www.google.com/amp/www.instructables.com/id/Drive-a-Stepper-Motor-with-an-Arduino-and-a-A4988-/%3Famp_page=true
Here is my current code: */
#include <Servo.h>
const int SPEEDO_PIN = A0;
const int RPM_PIN = A1;
const int FUEL_PIN = A5;
const int LEFT_INDICATOR = A2;
const int RIGHT_INDICATOR = A3;
const int PARKING_BREAK = A4;
const int FUEL_WARNING = 12;
// defines servo names
Servo speedo;
Servo rpm;
Servo fuel;
Servo cruise;
#define PACKET_SYNC 0xFF
#define PACKET_VER 2
#define SERVO_DIR_NORMAL false
#define SERVO_DIR_INVERT true
#define BAUD (9600)
int serial_byte;
void setup()
{
Serial.begin(115200);
speedo.attach(SPEEDO_PIN);
speedo.write(180);
rpm.attach(RPM_PIN);
rpm.write(180);
fuel.attach(FUEL_PIN);
fuel.write(40);
cruise.write(180);
pinMode(LEFT_INDICATOR, OUTPUT);
pinMode(RIGHT_INDICATOR, OUTPUT);
pinMode(PARKING_BREAK, OUTPUT);
pinMode(FUEL_WARNING, OUTPUT);
//range-splitter LED's
pinMode(22, OUTPUT);
pinMode(24, OUTPUT);
pinMode(26, OUTPUT);
digitalWrite(LEFT_INDICATOR, 0);
digitalWrite(RIGHT_INDICATOR, 0);
digitalWrite(PARKING_BREAK, 0);
digitalWrite(FUEL_WARNING, 0);
delay(600);
speedo.write(0);
rpm.write(0);
fuel.write(0);
digitalWrite(LEFT_INDICATOR, 1);
digitalWrite(RIGHT_INDICATOR, 1);
digitalWrite(PARKING_BREAK, 1);
digitalWrite(FUEL_WARNING, 1);
digitalWrite(22, 1);
digitalWrite(24, 1);
digitalWrite(26, 1);
delay(600);
speedo.write(180);
rpm.write(180);
fuel.write(85);
digitalWrite(LEFT_INDICATOR, 0);
digitalWrite(RIGHT_INDICATOR, 0);
digitalWrite(PARKING_BREAK, 0);
digitalWrite(FUEL_WARNING, 0);
digitalWrite(22, 0);
digitalWrite(24, 0);
digitalWrite(26, 0);
delay(1000);
}
void read_serial_byte_set_servo(Servo& servo, bool invert)
{
serial_byte = Serial.read();
serial_byte = (serial_byte < 0) ? 0 : ((serial_byte > 180) ? 180 : serial_byte);
if (invert)
servo.write(180 - serial_byte);
else
servo.write(serial_byte);
}
void read_serial_byte_set_servo_fuel(Servo& servo, bool invert)
{
serial_byte = Serial.read();
serial_byte = (serial_byte < 0) ? 0 : ((serial_byte > 180) ? 180 : serial_byte);
if (invert)
servo.write(85 - serial_byte); //set lower than the tach and speedo to limit movement.
else
servo.write(serial_byte);
}
void skip_serial_byte()
{
(void)Serial.read();
}
void digitalWriteFromBit(int port, int value, int shift)
{
digitalWrite(port, (value >> shift) & 0x01);
}
void loop()
{
if (Serial.available() < 16)
return;
serial_byte = Serial.read();
if (serial_byte != PACKET_SYNC)
return;
serial_byte = Serial.read();
if (serial_byte != PACKET_VER)
{
// lcd.clear();
// lcd.print("PROTOCOL VERSION ERROR");
return;
}
read_serial_byte_set_servo(speedo, SERVO_DIR_INVERT); // Speed
read_serial_byte_set_servo(rpm, SERVO_DIR_INVERT); // RPM
skip_serial_byte(); // Brake air pressure
skip_serial_byte(); // Brake temperature
read_serial_byte_set_servo_fuel(fuel, SERVO_DIR_INVERT); // Fuel ratio
skip_serial_byte(); // Oil pressure
skip_serial_byte(); // Oil temperature
skip_serial_byte(); // Water temperature
skip_serial_byte(); // Battery voltage
if (cruise.read() < 180)
{
}
if (cruise.read() > 179)
{
}
// Truck lights byte
serial_byte = Serial.read();
digitalWriteFromBit(LEFT_INDICATOR, serial_byte, 5);
digitalWriteFromBit(RIGHT_INDICATOR, serial_byte, 4);
// Warning lights bytes
serial_byte = Serial.read();
digitalWriteFromBit(PARKING_BREAK, serial_byte, 7);
digitalWriteFromBit(FUEL_WARNING, serial_byte, 3);
// Enabled flags
serial_byte = Serial.read();
// Text length
int text_len = Serial.read();
// Followed by text
if (0 < text_len && text_len < 127)
{
for (int i = 0; i < text_len; ++i)
{
while (Serial.available() == 0) // Wait for data if slow
{
delay(2);
}
}
}
}
So my code is fine the way it is...I just would like some guidance on how to convert the code to let me use the stepper motor drivers and steppers instead of the servos. Thanks!
