# -*- coding: latin-1 -*-
'''
Baseado no exemplo disponibilizado pela biblioteca
Exemplo de escrita dos dados da leitura do conversor ADC
em uma arquivo txt
Gustavo Voltani von Atzingen 15/04/2017
Curso IoT 2017 - IFSP Piracicaba
'''
import time
from wiringx86 import GPIOGalileo as GPIO
pinos = GPIO(debug=False)
pinos.pinMode(14, pinos.ANALOG_INPUT)
while 1:
with open('dados.txt', 'a') as f:
valor = pinos.analogRead(14)
f.write(str(valor) + '\n')
print str(valor) + '\n'
time.sleep(1)
def main(argv):
gpio = GPIO(debug=True)
pin = 13
state = gpio.HIGH
servo_pin = 9
gpio.pinMode(pin, gpio.OUTPUT)
gpio.pinMode(servo_pin, gpio.PWM)
# PWM period for G2 is same for all pins so second call is redundant
pwm_period = 3000000
gpio.setPWMPeriod(servo_pin, pwm_period)
# Turn on LED
gpio.digitalWrite(pin, gpio.HIGH)
# Read analog input from pin 14
adc_l = 14 # A0
# Set pin 14 to be used as an analog input GPIO pin.
gpio.pinMode(adc_l, gpio.ANALOG_INPUT)
# With a 100 Ohm resistor and 3.3K resistor and 10k Pot the min max vals
# read from the ADC are around
min_val = 204
max_val = 994
val_range = float(max_val - min_val)
# Servo min and max pulse in ms
min_pulse = 500000
max_pulse = 2500000
pulse_range = float(max_pulse-min_pulse)
print 'Analog reading from pin %d now...' % adc_l
try:
old_pulse_length = 0
while(True):
value_l = gpio.analogRead(adc_l)
print value_l
print ""
norm_val = float(value_l - min_val) / val_range
norm_val = min( max(0.0, norm_val), 1.0 )
print norm_val
# What is duty cycle?
pulse_length = (norm_val * pulse_range) + min_pulse
pulse_pct = float(abs(pulse_length - old_pulse_length)) / \
float(pulse_length)
# Only write new duty cycle if there is significant change from
# previous value
if pulse_pct > 0.02:
gpio.analogWrite(servo_pin, \
int(float(pulse_length)/pwm_period * 255.0))
else:
pass
old_pulse_length = pulse_length
time.sleep(0.2)
except KeyboardInterrupt:
gpio.analogWrite(servo_pin, 0)
# Leave the led turned off.
gpio.digitalWrite(pin, gpio.LOW)
print '\nCleaning up...'
gpio.cleanup()
gpio = GPIO(debug=True)
pin = 4
analogpin = 16 # 13 digital, Analog inputs: 14-A0,15-A1,16-A2,17-A3,18-A4,19-A5
state = gpio.HIGH
# Set pin 13 to be used as an output GPIO pin.
print 'Setting up pin %d' % pin
gpio.pinMode(pin, gpio.OUTPUT)
gpio.pinMode(analogpin, gpio.ANALOG_INPUT)
print 'Blinking pin %d now...' % pin
try:
while (True):
# Write a state to the pin. ON or OFF.
gpio.digitalWrite(pin, state)
value = gpio.analogRead(analogpin)
temp = value * 5 / 1024.0
temp_2 = temp - 0.5
temp_3 = (temp_2 / 0.01)
print "Value from " + str(analogpin) + " is: " + str(
value) + " | temp: " + str(temp_3)
# Toggle the state.
state = gpio.LOW if state == gpio.HIGH else gpio.HIGH
# Sleep for a while.
time.sleep(0.5)
# When you get tired of seeing the led blinking kill the loop with Ctrl-C.
except KeyboardInterrupt:
# Leave the led turned off.
def main(argv):
gpio = GPIO(debug=True)
pin = 13
state = gpio.HIGH
servo_pin = 9
gpio.pinMode(pin, gpio.OUTPUT)
gpio.pinMode(servo_pin, gpio.PWM)
# PWM period for G2 is same for all pins so second call is redundant
pwm_period = 3000000
gpio.setPWMPeriod(servo_pin, pwm_period)
# Turn on LED
gpio.digitalWrite(pin, gpio.HIGH)
# Read analog input from pin 14
adc_l = 14 # A0
# Set pin 14 to be used as an analog input GPIO pin.
gpio.pinMode(adc_l, gpio.ANALOG_INPUT)
# With a 100 Ohm resistor and 3.3K resistor and 10k Pot the min max vals
# read from the ADC are around
min_val = 204
max_val = 994
val_range = float(max_val - min_val)
# Servo min and max pulse in ms
min_pulse = 500000
max_pulse = 2500000
pulse_range = float(max_pulse - min_pulse)
print 'Analog reading from pin %d now...' % adc_l
try:
old_pulse_length = 0
while (True):
value_l = gpio.analogRead(adc_l)
print value_l
print ""
norm_val = float(value_l - min_val) / val_range
norm_val = min(max(0.0, norm_val), 1.0)
print norm_val
# What is duty cycle?
pulse_length = (norm_val * pulse_range) + min_pulse
pulse_pct = float(abs(pulse_length - old_pulse_length)) / \
float(pulse_length)
# Only write new duty cycle if there is significant change from
# previous value
if pulse_pct > 0.02:
gpio.analogWrite(servo_pin, \
int(float(pulse_length)/pwm_period * 255.0))
else:
pass
old_pulse_length = pulse_length
time.sleep(0.2)
except KeyboardInterrupt:
gpio.analogWrite(servo_pin, 0)
# Leave the led turned off.
gpio.digitalWrite(pin, gpio.LOW)
print '\nCleaning up...'
gpio.cleanup()
