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yocto_buzzer.py
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yocto_buzzer.py
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#*********************************************************************
#*
#* $Id: yocto_buzzer.py 23243 2016-02-23 14:13:12Z seb $
#*
#* Implements yFindBuzzer(), the high-level API for Buzzer functions
#*
#* - - - - - - - - - License information: - - - - - - - - -
#*
#* Copyright (C) 2011 and beyond by Yoctopuce Sarl, Switzerland.
#*
#* Yoctopuce Sarl (hereafter Licensor) grants to you a perpetual
#* non-exclusive license to use, modify, copy and integrate this
#* file into your software for the sole purpose of interfacing
#* with Yoctopuce products.
#*
#* You may reproduce and distribute copies of this file in
#* source or object form, as long as the sole purpose of this
#* code is to interface with Yoctopuce products. You must retain
#* this notice in the distributed source file.
#*
#* You should refer to Yoctopuce General Terms and Conditions
#* for additional information regarding your rights and
#* obligations.
#*
#* THE SOFTWARE AND DOCUMENTATION ARE PROVIDED 'AS IS' WITHOUT
#* WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING
#* WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, FITNESS
#* FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO
#* EVENT SHALL LICENSOR BE LIABLE FOR ANY INCIDENTAL, SPECIAL,
#* INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA,
#* COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR
#* SERVICES, ANY CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT
#* LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
#* CONTRIBUTION, OR OTHER SIMILAR COSTS, WHETHER ASSERTED ON THE
#* BASIS OF CONTRACT, TORT (INCLUDING NEGLIGENCE), BREACH OF
#* WARRANTY, OR OTHERWISE.
#*
#*********************************************************************/
__docformat__ = 'restructuredtext en'
from yocto_api import *
#--- (YBuzzer class start)
#noinspection PyProtectedMember
class YBuzzer(YFunction):
"""
The Yoctopuce application programming interface allows you to
choose the frequency and volume at which the buzzer must sound.
You can also pre-program a play sequence.
"""
#--- (end of YBuzzer class start)
#--- (YBuzzer return codes)
#--- (end of YBuzzer return codes)
#--- (YBuzzer dlldef)
#--- (end of YBuzzer dlldef)
#--- (YBuzzer definitions)
FREQUENCY_INVALID = YAPI.INVALID_DOUBLE
VOLUME_INVALID = YAPI.INVALID_UINT
PLAYSEQSIZE_INVALID = YAPI.INVALID_UINT
PLAYSEQMAXSIZE_INVALID = YAPI.INVALID_UINT
PLAYSEQSIGNATURE_INVALID = YAPI.INVALID_UINT
COMMAND_INVALID = YAPI.INVALID_STRING
#--- (end of YBuzzer definitions)
def __init__(self, func):
super(YBuzzer, self).__init__(func)
self._className = 'Buzzer'
#--- (YBuzzer attributes)
self._callback = None
self._frequency = YBuzzer.FREQUENCY_INVALID
self._volume = YBuzzer.VOLUME_INVALID
self._playSeqSize = YBuzzer.PLAYSEQSIZE_INVALID
self._playSeqMaxSize = YBuzzer.PLAYSEQMAXSIZE_INVALID
self._playSeqSignature = YBuzzer.PLAYSEQSIGNATURE_INVALID
self._command = YBuzzer.COMMAND_INVALID
#--- (end of YBuzzer attributes)
#--- (YBuzzer implementation)
def _parseAttr(self, member):
if member.name == "frequency":
self._frequency = round(member.ivalue * 1000.0 / 65536.0) / 1000.0
return 1
if member.name == "volume":
self._volume = member.ivalue
return 1
if member.name == "playSeqSize":
self._playSeqSize = member.ivalue
return 1
if member.name == "playSeqMaxSize":
self._playSeqMaxSize = member.ivalue
return 1
if member.name == "playSeqSignature":
self._playSeqSignature = member.ivalue
return 1
if member.name == "command":
self._command = member.svalue
return 1
super(YBuzzer, self)._parseAttr(member)
def set_frequency(self, newval):
"""
Changes the frequency of the signal sent to the buzzer. A zero value stops the buzzer.
@param newval : a floating point number corresponding to the frequency of the signal sent to the buzzer
@return YAPI.SUCCESS if the call succeeds.
On failure, throws an exception or returns a negative error code.
"""
rest_val = str(int(round(newval * 65536.0, 1)))
return self._setAttr("frequency", rest_val)
def get_frequency(self):
"""
Returns the frequency of the signal sent to the buzzer/speaker.
@return a floating point number corresponding to the frequency of the signal sent to the buzzer/speaker
On failure, throws an exception or returns YBuzzer.FREQUENCY_INVALID.
"""
if self._cacheExpiration <= YAPI.GetTickCount():
if self.load(YAPI.DefaultCacheValidity) != YAPI.SUCCESS:
return YBuzzer.FREQUENCY_INVALID
return self._frequency
def get_volume(self):
"""
Returns the volume of the signal sent to the buzzer/speaker.
@return an integer corresponding to the volume of the signal sent to the buzzer/speaker
On failure, throws an exception or returns YBuzzer.VOLUME_INVALID.
"""
if self._cacheExpiration <= YAPI.GetTickCount():
if self.load(YAPI.DefaultCacheValidity) != YAPI.SUCCESS:
return YBuzzer.VOLUME_INVALID
return self._volume
def set_volume(self, newval):
"""
Changes the volume of the signal sent to the buzzer/speaker.
@param newval : an integer corresponding to the volume of the signal sent to the buzzer/speaker
@return YAPI.SUCCESS if the call succeeds.
On failure, throws an exception or returns a negative error code.
"""
rest_val = str(newval)
return self._setAttr("volume", rest_val)
def get_playSeqSize(self):
"""
Returns the current length of the playing sequence.
@return an integer corresponding to the current length of the playing sequence
On failure, throws an exception or returns YBuzzer.PLAYSEQSIZE_INVALID.
"""
if self._cacheExpiration <= YAPI.GetTickCount():
if self.load(YAPI.DefaultCacheValidity) != YAPI.SUCCESS:
return YBuzzer.PLAYSEQSIZE_INVALID
return self._playSeqSize
def get_playSeqMaxSize(self):
"""
Returns the maximum length of the playing sequence.
@return an integer corresponding to the maximum length of the playing sequence
On failure, throws an exception or returns YBuzzer.PLAYSEQMAXSIZE_INVALID.
"""
if self._cacheExpiration == datetime.datetime.fromtimestamp(0):
if self.load(YAPI.DefaultCacheValidity) != YAPI.SUCCESS:
return YBuzzer.PLAYSEQMAXSIZE_INVALID
return self._playSeqMaxSize
def get_playSeqSignature(self):
"""
Returns the playing sequence signature. As playing
sequences cannot be read from the device, this can be used
to detect if a specific playing sequence is already
programmed.
@return an integer corresponding to the playing sequence signature
On failure, throws an exception or returns YBuzzer.PLAYSEQSIGNATURE_INVALID.
"""
if self._cacheExpiration <= YAPI.GetTickCount():
if self.load(YAPI.DefaultCacheValidity) != YAPI.SUCCESS:
return YBuzzer.PLAYSEQSIGNATURE_INVALID
return self._playSeqSignature
def get_command(self):
if self._cacheExpiration <= YAPI.GetTickCount():
if self.load(YAPI.DefaultCacheValidity) != YAPI.SUCCESS:
return YBuzzer.COMMAND_INVALID
return self._command
def set_command(self, newval):
rest_val = newval
return self._setAttr("command", rest_val)
@staticmethod
def FindBuzzer(func):
"""
Retrieves a buzzer for a given identifier.
The identifier can be specified using several formats:
<ul>
<li>FunctionLogicalName</li>
<li>ModuleSerialNumber.FunctionIdentifier</li>
<li>ModuleSerialNumber.FunctionLogicalName</li>
<li>ModuleLogicalName.FunctionIdentifier</li>
<li>ModuleLogicalName.FunctionLogicalName</li>
</ul>
This function does not require that the buzzer is online at the time
it is invoked. The returned object is nevertheless valid.
Use the method YBuzzer.isOnline() to test if the buzzer is
indeed online at a given time. In case of ambiguity when looking for
a buzzer by logical name, no error is notified: the first instance
found is returned. The search is performed first by hardware name,
then by logical name.
@param func : a string that uniquely characterizes the buzzer
@return a YBuzzer object allowing you to drive the buzzer.
"""
# obj
obj = YFunction._FindFromCache("Buzzer", func)
if obj is None:
obj = YBuzzer(func)
YFunction._AddToCache("Buzzer", func, obj)
return obj
def sendCommand(self, command):
# //may throw an exception
return self.set_command(command)
def addFreqMoveToPlaySeq(self, freq, msDelay):
"""
Adds a new frequency transition to the playing sequence.
@param freq : desired frequency when the transition is completed, in Hz
@param msDelay : duration of the frequency transition, in milliseconds.
@return YAPI.SUCCESS if the call succeeds.
On failure, throws an exception or returns a negative error code.
"""
return self.sendCommand("A" + str(int(freq)) + "," + str(int(msDelay)))
def addPulseToPlaySeq(self, freq, msDuration):
"""
Adds a pulse to the playing sequence.
@param freq : pulse frequency, in Hz
@param msDuration : pulse duration, in milliseconds.
@return YAPI.SUCCESS if the call succeeds.
On failure, throws an exception or returns a negative error code.
"""
return self.sendCommand("B" + str(int(freq)) + "," + str(int(msDuration)))
def addVolMoveToPlaySeq(self, volume, msDuration):
"""
Adds a new volume transition to the playing sequence. Frequency stays untouched:
if frequency is at zero, the transition has no effect.
@param volume : desired volume when the transition is completed, as a percentage.
@param msDuration : duration of the volume transition, in milliseconds.
@return YAPI.SUCCESS if the call succeeds.
On failure, throws an exception or returns a negative error code.
"""
return self.sendCommand("C" + str(int(volume)) + "," + str(int(msDuration)))
def startPlaySeq(self):
"""
Starts the preprogrammed playing sequence. The sequence
runs in loop until it is stopped by stopPlaySeq or an explicit
change.
@return YAPI.SUCCESS if the call succeeds.
On failure, throws an exception or returns a negative error code.
"""
return self.sendCommand("S")
def stopPlaySeq(self):
"""
Stops the preprogrammed playing sequence and sets the frequency to zero.
@return YAPI.SUCCESS if the call succeeds.
On failure, throws an exception or returns a negative error code.
"""
return self.sendCommand("X")
def resetPlaySeq(self):
"""
Resets the preprogrammed playing sequence and sets the frequency to zero.
@return YAPI.SUCCESS if the call succeeds.
On failure, throws an exception or returns a negative error code.
"""
return self.sendCommand("Z")
def pulse(self, frequency, duration):
"""
Activates the buzzer for a short duration.
@param frequency : pulse frequency, in hertz
@param duration : pulse duration in millseconds
@return YAPI.SUCCESS if the call succeeds.
On failure, throws an exception or returns a negative error code.
"""
return self.set_command("P" + str(int(frequency)) + "," + str(int(duration)))
def freqMove(self, frequency, duration):
"""
Makes the buzzer frequency change over a period of time.
@param frequency : frequency to reach, in hertz. A frequency under 25Hz stops the buzzer.
@param duration : pulse duration in millseconds
@return YAPI.SUCCESS if the call succeeds.
On failure, throws an exception or returns a negative error code.
"""
return self.set_command("F" + str(int(frequency)) + "," + str(int(duration)))
def volumeMove(self, volume, duration):
"""
Makes the buzzer volume change over a period of time, frequency stays untouched.
@param volume : volume to reach in %
@param duration : change duration in millseconds
@return YAPI.SUCCESS if the call succeeds.
On failure, throws an exception or returns a negative error code.
"""
return self.set_command("V" + str(int(volume)) + "," + str(int(duration)))
def nextBuzzer(self):
"""
Continues the enumeration of buzzers started using yFirstBuzzer().
@return a pointer to a YBuzzer object, corresponding to
a buzzer currently online, or a None pointer
if there are no more buzzers to enumerate.
"""
hwidRef = YRefParam()
if YAPI.YISERR(self._nextFunction(hwidRef)):
return None
if hwidRef.value == "":
return None
return YBuzzer.FindBuzzer(hwidRef.value)
#--- (end of YBuzzer implementation)
#--- (Buzzer functions)
@staticmethod
def FirstBuzzer():
"""
Starts the enumeration of buzzers currently accessible.
Use the method YBuzzer.nextBuzzer() to iterate on
next buzzers.
@return a pointer to a YBuzzer object, corresponding to
the first buzzer currently online, or a None pointer
if there are none.
"""
devRef = YRefParam()
neededsizeRef = YRefParam()
serialRef = YRefParam()
funcIdRef = YRefParam()
funcNameRef = YRefParam()
funcValRef = YRefParam()
errmsgRef = YRefParam()
size = YAPI.C_INTSIZE
#noinspection PyTypeChecker,PyCallingNonCallable
p = (ctypes.c_int * 1)()
err = YAPI.apiGetFunctionsByClass("Buzzer", 0, p, size, neededsizeRef, errmsgRef)
if YAPI.YISERR(err) or not neededsizeRef.value:
return None
if YAPI.YISERR(
YAPI.yapiGetFunctionInfo(p[0], devRef, serialRef, funcIdRef, funcNameRef, funcValRef, errmsgRef)):
return None
return YBuzzer.FindBuzzer(serialRef.value + "." + funcIdRef.value)
#--- (end of Buzzer functions)

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