code balise ffvl

#!/usr/bin/python
# -*- coding: utf-8 -*-

import RPi.GPIO as GPIO
import time
import urllib,urllib2,base64
import math

P_ANEMO    = 18
P_CLK  = 23
P_MOSI = 19
P_MISO = 21
P_CS   = 24


GPIO.setmode(GPIO.BOARD)

GPIO.setup(P_ANEMO, GPIO.IN)
GPIO.setup(P_CLK, GPIO.OUT)
GPIO.setup(P_MOSI, GPIO.OUT)
GPIO.setup(P_MISO, GPIO.IN)
GPIO.setup(P_CS, GPIO.OUT)



def anemo_pulse(channel):
  global anemo_count
  anemo_count += 1


def read_sensor(ch_no = 0):
  if (ch_no == 0):
    cmd = 0x6   # CH0
  else:
    cmd = 0x7   # CH1

  # init pins low
  GPIO.output(P_CLK, False)
  GPIO.output(P_CS, False)

  # write first 3 bits to MOSI
  cmd <<= 5
  for bno in range(3):
    if (cmd & 0x80):
      GPIO.output(P_MOSI, True)
    else:
      GPIO.output(P_MOSI, False)
    cmd <<= 1
    GPIO.output(P_CLK, True)
    GPIO.output(P_CLK, False)

  # read 2(empty and null bit) + 10 ADC bits from MISO
  adc_result = 0
  for bit_no in range(12):
    GPIO.output(P_CLK, True)
    GPIO.output(P_CLK, False)
    adc_result <<= 1
    if (GPIO.input(P_MISO)):
      adc_result |= 0x1

  GPIO.output(P_CS, True)

  adc_result /= 2    # first bit is 'null' so drop it
  return adc_result


anemo_count = 0.
GPIO.add_event_detect(P_ANEMO, GPIO.FALLING, callback=anemo_pulse)


try:
  while True:

    vitesseVentMoy = 0.
    vitesseVentMin = 999999.
    vitesseVentMax = 0.

    xVector = 0.
    yVector = 0.

    for i in range(0,30):

      anemo_count=0.
      time.sleep(10)

      vitesse  = anemo_count
      vitesse *= 0.1006 * 3.6 # 1.006m/s sur 10 secondes

      dir_sensor = read_sensor(0)/1023.

      direction = dir_sensor*360.
      direction_rad = dir_sensor*2*math.pi

      xVector += vitesse * math.cos(direction_rad)
      yVector += vitesse * math.sin(direction_rad)

      if vitesse < vitesseVentMin:
        vitesseVentMin = vitesse

      if vitesse > vitesseVentMax:
        vitesseVentMax = vitesse

      vitesseVentMoy += vitesse

      #print "#", i, " : ", vitesse, "km/h  ", direction, "°"

    vitesseVentMoy /= 30.;

    dirVentMoy = math.atan2( yVector , xVector) / math.pi * 180.

    #print "vitesse inst:", vitesse, "km/h"
    #print "vitesse moy :", vitesseVentMoy, "km/h"
    #print "vitesse max :", vitesseVentMax, "km/h"
    #print "vitesse min :", vitesseVentMin, "km/h"
    #print "dir inst    :", direction, "°"
    #print "dir moy     :", dirVentMoy, "°"

    params = urllib.urlencode({
      'idBalise': 6000,
      'vitesseVentMoy': vitesseVentMoy,
      'vitesseVentMin': vitesseVentMin,
      'vitesseVentMax': vitesseVentMax,
      'directVentMoy': dirVentMoy,
      'directVentInst': direction
    })

    req = urllib2.Request('http://URL-UPLOAD-FFVL', params)
    try:
      response = urllib2.urlopen(req)
      data=response.read()
      print data
    except urllib2.URLError, e:
      print "error", e
    del req


except KeyboardInterrupt:
  GPIO.cleanup()

GPIO.cleanup()