Arduino dock 2 always high value

florbus

I'm using a omega 2 Arduino dock 2 and have it connected to a easydriver to run a stepper motor. I'm trying to remotely turn a stepper motor. The omega has a python server that is waiting for http requests. This is the python code.

--

import onionGpio
from flask import Flask, request
app = Flask(name)
gpioLeft = 4
gpioMiddle = 2
gpioRight = 3
gpioObjLeft = onionGpio.OnionGpio(gpioLeft)
gpioObjMiddle = onionGpio.OnionGpio(gpioMiddle)
gpioObjRight = onionGpio.OnionGpio(gpioRight)
status = gpioObjLeft.setOutputDirection(0)
@app.route('/',methods=['POST'])
def gpio():
if request.form['blind'] == 1:
status = gpioObjLeft.setValue(1)
elif request.form['blind'] == 2:
status = gpioObjMiddle.setValue(1)
else:
status = gpioObjRight.setValue(1)
print 'GPIO%d set to: %d'%(gpioNum, value)
time.sleep(10)
status = gpioObjLeft.setValue(0)
return 'success'
if name == "main":
app.run(host='0.0.0.0')

--

Then on the arduino I have the following code:

--

#define DIR_PIN 2
#define STEP_PIN 3
#define INPUT_PIN 4

void setup() {
pinMode(DIR_PIN, OUTPUT);
pinMode(STEP_PIN, OUTPUT);
pinMode(INPUT_PIN, INPUT);
Serial.begin(9600);
Serial.print("SETUP Value");
}

void loop() {

//rotate a specific number of degrees
if (digitalRead(4) == HIGH){
rotateDeg(3600, 1);
Serial.print("High Value");
delay(4000);
} else {
Serial.print("Low Value");
delay(4000);
}

}

void rotate(int steps, float speed) {
//rotate a specific number of microsteps (8 microsteps per step) – (negitive for reverse movement)
//speed is any number from .01 -> 1 with 1 being fastest – Slower is stronger
int dir = (steps > 0) ? HIGH : LOW;
steps = abs(steps);

digitalWrite(DIR_PIN, dir);

float usDelay = (1 / speed) * 70;

for (int i = 0; i < steps; i++) {
digitalWrite(STEP_PIN, HIGH);
delayMicroseconds(usDelay);
digitalWrite(STEP_PIN, LOW);
delayMicroseconds(usDelay);

}
}

--

The problem is the stepper motor is running constantly. So it seem that that green wire listed below (Pin 3) is always giving a high value. Does anyone know what I'm doing wrong? I'm very much a software guy not hardware.

I currently have the Omega2 powered by a microUSB to an outlit.

The easydriver has its own power supply.

alt text

György Farkas

@florbus About your hardware connections (only):
It is not a good idea to connect directly the Omega2(+)'s GPIOs / Expansion Header (a 3.3V powered device)
to the Atmega's pins / the Arduino Header (a 5V powered device) - usually some voltage level shifting needed.
For example ATmega's output (output high voltage min 4.2V) may damage Omega's input (input high voltage max V_3.3V + 0.3 V).

On Onion's Arduino Dock 2 - according to the constructor's conception - Omega2(+) and ATmega328 (the Arduino) can communicate with each other via I2C and / or serially (Omega's UART1 - ATmega's UART).
Omega2(+)'s GPIO4 is designated as I2C SCL, GPIO5 is designated as I2C SDA by default (omega2-ctrl gpiomux get).

florbus

Thank you.

I think one of these bad boys should do the trick.

https://www.sparkfun.com/products/12009