MS_HW1_Mihai

#4
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BOARD)

GPIO.setup(12,GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(16,GPIO.OUT)

pwm = GPIO.PWM(16, 50)
pwm.start(10)
i=0
rise=1
while True:
    if(rise==1):
        print i
        pwm.ChangeDutyCycle(i)
        i=i+10
        time.sleep(0.5)
        if(i==100):
            rise=0
    if(rise==0):
        pwm.ChangeDutyCycle(i)
        i=i-10
        time.sleep(0.5)
        if(i==0):
            rise=1


GPIO.cleanup()
#--------------------
import RPi.GPIO as GPIO #ex1/2
import time
import threading

GPIO.setmode(GPIO.BOARD)
GPIO.setup(12,GPIO.IN,pull_up_down=GPIO.PUD_UP)

GPIO.setup(16,GPIO.OUT)

led_on = False
def button_pressed(pin):
        print 'Button was pressed connected at the pin %s' % pin
        global led_on
        if not led_on:
                print 'Led is on'
                GPIO.output(16,GPIO.HIGH)
                led_on = True
        else:
                print 'Led is off'
                GPIO.output(16,GPIO.LOW)
                led_on = False

def detect_event():
        GPIO.add_event_detect(12,GPIO.RISING,button_pressed,bouncetime=200)

try:
        print 'Start listening...'
        th = threading.Thread(target=detect_event)
        th.start()
        while True:
                time.sleep(1) # listening 20 seconds for events to be fired
                print "Press ctrl+c to stop"
finally:
        print 'Stop listening.'
        th.join()
        GPIO.cleanup()

#-------------------------------------------------------------------------------------------

import RPi.GPIO as GPIO #ex4
import time
import threading

GPIO.setmode(GPIO.BOARD)
GPIO.setup(12,GPIO.IN,pull_up_down=GPIO.PUD_UP)

GPIO.setup(16,GPIO.OUT)

led_on = False
pwm_value = 0.0
pwm = GPIO.PWM(16,50)
pwm.start(10)
reverse = False
def button_pressed(pin):
        global pwm_value
        global pwm
        global reverse
        if not reverse:
                pwm_value += 10
        else:
                pwm_value -= 10
        if pwm_value == 100 or pwm_value == 0:
                reverse = not reverse
        pwm.ChangeDutyCycle(pwm_value)
        print "Current intensity in percent: %s" % pwm_value

def detect_event():
        GPIO.add_event_detect(12,GPIO.RISING,button_pressed,bouncetime=200)

try:
        print 'Start listening...'
        th = threading.Thread(target=detect_event)
        th.start()
        while True:
                time.sleep(1) # listening 20 seconds for events to be fired
                print "Press ctrl+c to stop"
finally:
        print 'Stop listening.'
        th.join()
        GPIO.cleanup()


#-------------------------------------------------------------------------------------------

import RPi.GPIO as GPIO #ex3
import time
import threading

GPIO.setmode(GPIO.BOARD)
GPIO.setup(12,GPIO.IN,pull_up_down=GPIO.PUD_UP)

GPIO.setup(16,GPIO.OUT)

led_on = False
pwm_value = 0.0
pwm = GPIO.PWM(16,100)
pwm.start(50.0)
def button_pressed(pin):
        global pwm_value
        global pwm
        pwm_value += 1
        if pwm_value > 100:
                pwm_value = 1.0
        pwm.ChangeFrequency(pwm_value)
        print "Current intensity in percent: %s" % pwm_value

def detect_event():
        GPIO.add_event_detect(12,GPIO.RISING,button_pressed,bouncetime=200)

try:
        print 'Start listening...'
        th = threading.Thread(target=detect_event)
        th.start()
        while True:
                time.sleep(1) # listening 20 seconds for events to be fired
                print "Press ctrl+c to stop"
finally:
        print 'Stop listening.'
        th.join()
        GPIO.cleanup()



#-------------------------------------------------------------------------------------------

import RPi.GPIO as GPIO
import time
import threading #ex5
import sys

GPIO.setmode(GPIO.BOARD)
GPIO.setup(12,GPIO.IN,pull_up_down=GPIO.PUD_UP)

GPIO.setup(16,GPIO.OUT)

if len(sys.argv) != 3:
        raise Exception("YOU ARE BAD")

led_on = False
pulses = int(sys.argv[1])
times = int(sys.argv[2])

def button_pressed():
        global times
        global pulses
        global led_on
        while True:
                if pulses:
                        GPIO.output(16,GPIO.HIGH)
                        time.sleep(times)
                        GPIO.output(16,GPIO.LOW)
                        time.sleep(times)
                        pulses = pulses - 1

                else:
                        break


try:
        print 'Start listening...'
        th = threading.Thread(target=button_pressed)
        th.start()
        while True:
                time.sleep(1) # listening 20 seconds for events to be fired
                print "Press ctrl+c to stop"
finally:
        print 'Stop listening.'
        th.join()
        GPIO.cleanup()