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simple graphical plotter

fertito
Marc 12 years ago
parent
commit
e7ece519a9
  1. 163
      contrib/plot_accel.py

163
contrib/plot_accel.py

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (C) 2010 Marc Poulhiès
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# Author: Marc Poulhiès
import time
import sys
import pygame
import os
import optparse
from datetime import datetime
import math
import serial
import array
def startAccessPoint():
return array.array('B', [0xFF, 0x07, 0x03]).tostring()
def accDataRequest():
return array.array('B', [0xFF, 0x08, 0x07, 0x00, 0x00, 0x00, 0x00]).tostring()
class Graph:
fontheight = 20
# These four values sould go into the configuration file
winheight = 800 # Window height at startup
width = 700 # Window width at startup
bgcolor = (255,255,255) # Background color for the window
color = [(255,0,0), (0,255,0), (0,0,255)]
txtcolor = (255,0,0)
t = 0
prev_display_debug = None
def __init__(self, size):
pygame.init()
self.previous_points = [0]*size
self.font = pygame.font.Font(None, self.fontheight)
self.screen = pygame.display.set_mode( (self.width, self.winheight), pygame.RESIZABLE )
pygame.display.set_caption( "Plotter" )
self.screen.fill( self.bgcolor )
pygame.display.flip()
def display_debug(self, dtext):
text = self.font.render(dtext, 1, self.txtcolor)
pos = text.get_rect(left=0, top=self.winheight -self.fontheight - 5)
if self.prev_display_debug:
self.screen.fill(self.bgcolor, self.prev_display_debug)
self.screen.blit(text, pos)
if self.prev_display_debug:
pygame.display.update(self.prev_display_debug)
else:
pygame.display.update(pos)
self.prev_display_debug = pos
def plot_values(self, values):
self.t += 1
yoff = 0
each_y = self.winheight/len(values)
norms = [a * (each_y-5)/each_y for a in values]
for i in xrange(len(values)):
pygame.draw.aaline(self.screen,
self.color[i%3],
(self.t-1,
self.previous_points[i]+yoff),
(self.t,
norms[i]+yoff),
1)
yoff += each_y
rect = pygame.Rect(self.t-1, 0, 40, self.winheight)
pygame.display.update(rect)
if self.t >= 700:
self.t = 0
self.screen.fill( self.bgcolor )
self.previous_points = norms
def conv(c):
if c > 127:
return c - 256
else:
return c
def main():
parser = optparse.OptionParser(
usage='Usage: %prog [options]',
description="Plotter !")
parser.add_option("-f", "--freq",
help="Sampling frequency in ms (defaults: 10ms)",
default=10, type="int",
metavar="sampling_freq")
parser.add_option("-v", "--verbose",
help="Be verbose and display lots of garbage",
action="store_true", default=False,
metavar="verbose")
(options, args) = parser.parse_args(sys.argv[1:])
sampling_freq = options.freq
ser = serial.Serial('/dev/ttyACM0',115200,timeout=1)
ser.write(startAccessPoint())
g = None
while True:
ser.write(accDataRequest())
accel = ser.read(7)
if len(accel) < 3:
continue
if ord(accel[0]) != 0 and ord(accel[1]) != 0 and ord(accel[2]) != 0:
l = [conv(ord(accel[0]))+128, conv(ord(accel[1]))+128,conv(ord(accel[2]))+128]
print l
print "***"
else:
continue
if g == None:
g = Graph(len(l))
g.plot_values(l)
pygame.time.wait(sampling_freq)
if __name__ == '__main__':
sys.exit(main())
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