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"""
# Xytronic LF-1600
# Open Source firmware
# Sine calculation
#
# Copyright (c) 2019 Michael Buesch <m@bues.ch>
#
# 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 2 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""
import math
__all__ = [
"SineGenerator",
]
class SineGenerator(object):
__slots__ = (
"f",
"peakV",
"cycleT",
"v",
)
def __init__(self, f, rmsV=5.0):
self.f = max(f, 0.0)
self.peakV = rmsV * math.sqrt(2)
self.cycleT = 0.0
self.v = 0.0
@property
def rmsV(self):
return self.peakV / math.sqrt(2)
@property
def cycleDur(self):
return 1.0 / self.f
def calc(self, dt):
if self.f:
self.cycleT += dt
self.v = self.peakV * math.sin(math.pi * 2 *
(self.cycleT / self.cycleDur))
return self.v
if __name__ == "__main__":
import time
sine = SineGenerator(f=0.5)
dt = 0.1
i = 0.0
while 1:
v = sine.calc(dt)
print("t=%.1f, out=%.1f" % (i, v))
time.sleep(dt)
i += dt
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