import serial
import time

import pygame
from pygame.locals import *

pygame.init()
screen = pygame.display.set_mode((640, 480))
pygame.display.set_caption('Pygame Caption')
pygame.mouse.set_visible(0)

done = False

ser = serial.Serial('/dev/tty.usbserial-A4001u0a', 9600, timeout = 1)
while not done:
   for event in pygame.event.get():
      if (event.type == KEYUP) or (event.type == KEYDOWN):
         print event
         if (event.key == K_ESCAPE):
            done = True
         
         elif (event.key == K_UP):
                if (event.type == KEYUP):
                        ser.write('1')
                else:
                        ser.write('0')

                        #print ser.readlines()
         
         elif (event.key == K_DOWN):
                if (event.type == KEYUP):
                        ser.write('3')
                else:
                        ser.write('2')

/*Messing around with pygame and motor controller  */

#define pwmPin 9
#define dirPin 10

#define forwardDown 48
#define forwardUp 49
#define backDown 50
#define backUp 51



void setup()                    // run once, when the sketch starts
{
  Serial.begin(9600);   // opens serial port, sets data rate to 9600 bps
  pinMode(pwmPin, OUTPUT);      // sets the digital pin as output
  pinMode(dirPin, OUTPUT);  

   
}

void loop()                     // run over and over again
{
  
  if (Serial.available() > 0) {
    
    // read the incoming byte:
    int incSerialByte = Serial.read();
    
    // say what you got:
    Serial.print("I received: ");
    Serial.print(incSerialByte, DEC);
    
    
    if(incSerialByte == forwardDown)
    {
      analogWrite(pwmPin, 255);  
      Serial.println(" forwardDown");
    }
    else if(incSerialByte == forwardUp)
    {
      analogWrite(pwmPin, 0);
      Serial.println(" forwardUp");
    }
    else if(incSerialByte == backDown)
    {
      digitalWrite(dirPin, HIGH);
      analogWrite(pwmPin, 255); 
      Serial.println(" backDown");
      
    }
    else if(incSerialByte == backUp)
    {
      digitalWrite(dirPin, LOW);
      analogWrite(pwmPin, 0); 
      
      Serial.println(" backUp");
    }

  
  }
}

/usr/bin/python_serial.py:4: RuntimeWarning: import cdrom: No module named cdrom

import pygame

/usr/bin/python_serial.py:4: RuntimeWarning: import joystick: No module named joystick

import pygame

Traceback (most recent call last):

File "/usr/bin/python_serial.py", line 14, in <module>

ser = serial.Serial('/dev/tty.usbserial-A4001u0a', 9600, timeout = 1)

File "/usr/bin/serial/serialutil.py", line 156, in __init__

self.open()

File "/usr/bin/serial/serialposix.py", line 141, in open

raise SerialException("Could not open port: %s" % msg)

serial.serialutil.SerialException: Could not open port: [Errno 2] No such file or directory: '/dev/tty.usbserial-A4001u0a'

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