# -*- coding: utf-8 -*-
# ********************************************************************
#
#  $Id: svn_id $
#
#  Implements yFindPwmPowerSource(), the high-level API for PwmPowerSource functions
#
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__docformat__ = 'restructuredtext en'
from yocto_api import *


#--- (YPwmPowerSource class start)
#noinspection PyProtectedMember
class YPwmPowerSource(YFunction):
    """
    The YPwmPowerSource class allows you to configure
    the voltage source used by all PWM outputs on the same device.

    """
    #--- (end of YPwmPowerSource class start)
    #--- (YPwmPowerSource return codes)
    #--- (end of YPwmPowerSource return codes)
    #--- (YPwmPowerSource dlldef)
    #--- (end of YPwmPowerSource dlldef)
    #--- (YPwmPowerSource yapiwrapper)
    #--- (end of YPwmPowerSource yapiwrapper)
    #--- (YPwmPowerSource definitions)
    POWERMODE_USB_5V = 0
    POWERMODE_USB_3V = 1
    POWERMODE_EXT_V = 2
    POWERMODE_OPNDRN = 3
    POWERMODE_INVALID = -1
    #--- (end of YPwmPowerSource definitions)

    def __init__(self, func):
        super(YPwmPowerSource, self).__init__(func)
        self._className = 'PwmPowerSource'
        #--- (YPwmPowerSource attributes)
        self._callback = None
        self._powerMode = YPwmPowerSource.POWERMODE_INVALID
        #--- (end of YPwmPowerSource attributes)

    #--- (YPwmPowerSource implementation)
    def _parseAttr(self, json_val):
        if json_val.has("powerMode"):
            self._powerMode = json_val.getInt("powerMode")
        super(YPwmPowerSource, self)._parseAttr(json_val)

    def get_powerMode(self):
        """
        Returns the selected power source for the PWM on the same device.

        @return a value among YPwmPowerSource.POWERMODE_USB_5V, YPwmPowerSource.POWERMODE_USB_3V,
        YPwmPowerSource.POWERMODE_EXT_V and YPwmPowerSource.POWERMODE_OPNDRN corresponding to the selected
        power source for the PWM on the same device

        On failure, throws an exception or returns YPwmPowerSource.POWERMODE_INVALID.
        """
        # res
        if self._cacheExpiration <= YAPI.GetTickCount():
            if self.load(YAPI._yapiContext.GetCacheValidity()) != YAPI.SUCCESS:
                return YPwmPowerSource.POWERMODE_INVALID
        res = self._powerMode
        return res

    def set_powerMode(self, newval):
        """
        Changes  the PWM power source. PWM can use isolated 5V from USB, isolated 3V from USB or
        voltage from an external power source. The PWM can also work in open drain  mode. In that
        mode, the PWM actively pulls the line down.
        Warning: this setting is common to all PWM on the same device. If you change that parameter,
        all PWM located on the same device are  affected.
        If you want the change to be kept after a device reboot, make sure  to call the matching
        module saveToFlash().

        @param newval : a value among YPwmPowerSource.POWERMODE_USB_5V, YPwmPowerSource.POWERMODE_USB_3V,
        YPwmPowerSource.POWERMODE_EXT_V and YPwmPowerSource.POWERMODE_OPNDRN corresponding to  the PWM power source

        @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("powerMode", rest_val)

    @staticmethod
    def FindPwmPowerSource(func):
        """
        Retrieves a PWM generator power source for a given identifier.
        The identifier can be specified using several formats:

        - FunctionLogicalName
        - ModuleSerialNumber.FunctionIdentifier
        - ModuleSerialNumber.FunctionLogicalName
        - ModuleLogicalName.FunctionIdentifier
        - ModuleLogicalName.FunctionLogicalName


        This function does not require that the PWM generator power source is online at the time
        it is invoked. The returned object is nevertheless valid.
        Use the method YPwmPowerSource.isOnline() to test if the PWM generator power source is
        indeed online at a given time. In case of ambiguity when looking for
        a PWM generator power source 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.

        If a call to this object's is_online() method returns FALSE although
        you are certain that the matching device is plugged, make sure that you did
        call registerHub() at application initialization time.

        @param func : a string that uniquely characterizes the PWM generator power source, for instance
                YPWMTX01.pwmPowerSource.

        @return a YPwmPowerSource object allowing you to drive the PWM generator power source.
        """
        # obj
        obj = YFunction._FindFromCache("PwmPowerSource", func)
        if obj is None:
            obj = YPwmPowerSource(func)
            YFunction._AddToCache("PwmPowerSource", func, obj)
        return obj

    def nextPwmPowerSource(self):
        """
        Continues the enumeration of PWM generator power sources started using yFirstPwmPowerSource().
        Caution: You can't make any assumption about the returned PWM generator power sources order.
        If you want to find a specific a PWM generator power source, use PwmPowerSource.findPwmPowerSource()
        and a hardwareID or a logical name.

        @return a pointer to a YPwmPowerSource object, corresponding to
                a PWM generator power source currently online, or a None pointer
                if there are no more PWM generator power sources to enumerate.
        """
        hwidRef = YRefParam()
        if YAPI.YISERR(self._nextFunction(hwidRef)):
            return None
        if hwidRef.value == "":
            return None
        return YPwmPowerSource.FindPwmPowerSource(hwidRef.value)

#--- (end of YPwmPowerSource implementation)

#--- (YPwmPowerSource functions)

    @staticmethod
    def FirstPwmPowerSource():
        """
        Starts the enumeration of PWM generator power sources currently accessible.
        Use the method YPwmPowerSource.nextPwmPowerSource() to iterate on
        next PWM generator power sources.

        @return a pointer to a YPwmPowerSource object, corresponding to
                the first PWM generator power source 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("PwmPowerSource", 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 YPwmPowerSource.FindPwmPowerSource(serialRef.value + "." + funcIdRef.value)

#--- (end of YPwmPowerSource functions)
