#==========================================================================
# Modification Notice
#--------------------------------------------------------------------------
# This file is derived from aardvark_py.py distributed with the Total Phase
# Aardvark Python Software API. Permission to modify and redistribute
# this file (and the associated Shared Object Files) has been granted
# explicitly by Total Phase, Inc. for use in this package. Distribution
# and use of this package is subject to the license agreement provided
# in the LICENSE.txt file distributed with this package.
#==========================================================================
#==========================================================================
# DISTRIBUTION VERSION
#--------------------------------------------------------------------------
# This is a PEP 0008 and PEP 0440 compliant version string, i.e.
# "major.minor.micro". It is read by setup.py to determine the
# distribution version for public release on PyPI.
#
# "major.minor" MUST match the v[major.minor] release version of the
# aardvark API release zip file. For example, if the Total Phase API
# file is aardvark-api-macosx-x86_64-v5.15.zip, this version must start
# with "5.15".
#
# "micro" is an additional version specifier that is incremented whenever
# a new release of this distribution is published. It must be reset to
# "0" whenever the major or minor version is changed, i.e.
# 5.15.0 < 5.15.1 < 5.15.2 < 5.16.0 < 5.16.1 < 6.0.0
#
# For a discussion on single-sourcing the version across setup.py and
# the project code, see
# https://packaging.python.org/en/latest/single_source_version.html
#==========================================================================
__version__ = "5.30.2"
#==========================================================================
# Aardvark Interface Library
#--------------------------------------------------------------------------
# Copyright (c) 2002-2008 Total Phase, Inc.
# All rights reserved.
# www.totalphase.com
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# - Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# - Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# - Neither the name of Total Phase, Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#--------------------------------------------------------------------------
# To access Aardvark devices through the API:
#
# 1) Use one of the following shared objects:
# aardvark.so -- Linux shared object
# aardvark.dll -- Windows dynamic link library
#
# 2) Along with one of the following language modules:
# aardvark.c/h -- C/C++ API header file and interface module
# aardvark_py.py -- Python API
# aardvark.bas -- Visual Basic 6 API
# aardvark.cs -- C# .NET source
# aardvark_net.dll -- Compiled .NET binding
#==========================================================================
#==========================================================================
# VERSION
#==========================================================================
AA_API_VERSION = 0x050a # v5.10
AA_REQ_SW_VERSION = 0x050a # v5.10
from . import aardvark as api
AA_SW_VERSION = api.py_version() & 0xffff
AA_REQ_API_VERSION = (api.py_version() >> 16) & 0xffff
AA_LIBRARY_LOADED = \
((AA_SW_VERSION >= AA_REQ_SW_VERSION) and \
(AA_API_VERSION >= AA_REQ_API_VERSION))
from array import array, ArrayType
import struct
#==========================================================================
# HELPER FUNCTIONS
#==========================================================================
return array('B', [0]*n)
return array('H', [0]*n)
return array('I', [0]*n)
return array('K', [0]*n)
return array('b', [0]*n)
return array('h', [0]*n)
return array('i', [0]*n)
return array('L', [0]*n)
return array('f', [0]*n)
return array('d', [0]*n)
#==========================================================================
# STATUS CODES
#==========================================================================
# All API functions return an integer which is the result of the
# transaction, or a status code if negative. The status codes are
# defined as follows:
# enum AardvarkStatus
# General codes (0 to -99)
AA_OK = 0
AA_UNABLE_TO_LOAD_LIBRARY = -1
AA_UNABLE_TO_LOAD_DRIVER = -2
AA_UNABLE_TO_LOAD_FUNCTION = -3
AA_INCOMPATIBLE_LIBRARY = -4
AA_INCOMPATIBLE_DEVICE = -5
AA_COMMUNICATION_ERROR = -6
AA_UNABLE_TO_OPEN = -7
AA_UNABLE_TO_CLOSE = -8
AA_INVALID_HANDLE = -9
AA_CONFIG_ERROR = -10
# I2C codes (-100 to -199)
AA_I2C_NOT_AVAILABLE = -100
AA_I2C_NOT_ENABLED = -101
AA_I2C_READ_ERROR = -102
AA_I2C_WRITE_ERROR = -103
AA_I2C_SLAVE_BAD_CONFIG = -104
AA_I2C_SLAVE_READ_ERROR = -105
AA_I2C_SLAVE_TIMEOUT = -106
AA_I2C_DROPPED_EXCESS_BYTES = -107
AA_I2C_BUS_ALREADY_FREE = -108
# SPI codes (-200 to -299)
AA_SPI_NOT_AVAILABLE = -200
AA_SPI_NOT_ENABLED = -201
AA_SPI_WRITE_ERROR = -202
AA_SPI_SLAVE_READ_ERROR = -203
AA_SPI_SLAVE_TIMEOUT = -204
AA_SPI_DROPPED_EXCESS_BYTES = -205
# GPIO codes (-400 to -499)
AA_GPIO_NOT_AVAILABLE = -400
# I2C bus monitor codes (-500 to -599)
AA_I2C_MONITOR_NOT_AVAILABLE = -500
AA_I2C_MONITOR_NOT_ENABLED = -501
#==========================================================================
# GENERAL TYPE DEFINITIONS
#==========================================================================
# Aardvark handle type definition
# typedef Aardvark => integer
# Deprecated type definitions.
#
# These are only for use with legacy code and
# should not be used for new development.
# typedef aa_u08 => integer
# typedef aa_u16 => integer
# typedef aa_u32 => integer
# typedef aa_s08 => integer
# typedef aa_s16 => integer
# typedef aa_s32 => integer
# Aardvark version matrix.
#
# This matrix describes the various version dependencies
# of Aardvark components. It can be used to determine
# which component caused an incompatibility error.
#
# All version numbers are of the format:
# (major << 8) | minor
#
# ex. v1.20 would be encoded as: 0x0114
[docs]class AardvarkVersion:
def __init__ (self):
# Software, firmware, and hardware versions.
self.software = 0
self.firmware = 0
self.hardware = 0
# Firmware requires that software must be >= this version.
self.sw_req_by_fw = 0
# Software requires that firmware must be >= this version.
self.fw_req_by_sw = 0
# Software requires that the API interface must be >= this version.
self.api_req_by_sw = 0
#==========================================================================
# GENERAL API
#==========================================================================
# Get a list of ports to which Aardvark devices are attached.
#
# nelem = maximum number of elements to return
# devices = array into which the port numbers are returned
#
# Each element of the array is written with the port number.
# Devices that are in-use are ORed with AA_PORT_NOT_FREE (0x8000).
#
# ex. devices are attached to ports 0, 1, 2
# ports 0 and 2 are available, and port 1 is in-use.
# array => 0x0000, 0x8001, 0x0002
#
# If the array is NULL, it is not filled with any values.
# If there are more devices than the array size, only the
# first nmemb port numbers will be written into the array.
#
# Returns the number of devices found, regardless of the
# array size.
AA_PORT_NOT_FREE = 0x8000
[docs]def aa_find_devices (devices):
"""usage: (int return, u16[] devices) = aa_find_devices(u16[] devices)
All arrays can be passed into the API as an ArrayType object or as
a tuple (array, length), where array is an ArrayType object and
length is an integer. The user-specified length would then serve
as the length argument to the API funtion (please refer to the
product datasheet). If only the array is provided, the array's
intrinsic length is used as the argument to the underlying API
function.
Additionally, for arrays that are filled by the API function, an
integer can be passed in place of the array argument and the API
will automatically create an array of that length. All output
arrays, whether passed in or generated, are passed back in the
returned tuple."""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# devices pre-processing
__devices = isinstance(devices, int)
if __devices:
(devices, num_devices) = (array_u16(devices), devices)
else:
(devices, num_devices) = isinstance(devices, ArrayType) and (devices, len(devices)) or (devices[0], min(len(devices[0]), int(devices[1])))
if devices.typecode != 'H':
raise TypeError("type for 'devices' must be array('H')")
# Call API function
(_ret_) = api.py_aa_find_devices(num_devices, devices)
# devices post-processing
if __devices: del devices[max(0, min(_ret_, len(devices))):]
return (_ret_, devices)
# Get a list of ports to which Aardvark devices are attached.
#
# This function is the same as aa_find_devices() except that
# it returns the unique IDs of each Aardvark device. The IDs
# are guaranteed to be non-zero if valid.
#
# The IDs are the unsigned integer representation of the 10-digit
# serial numbers.
[docs]def aa_find_devices_ext (devices, unique_ids):
"""usage: (int return, u16[] devices, u32[] unique_ids) = aa_find_devices_ext(u16[] devices, u32[] unique_ids)
All arrays can be passed into the API as an ArrayType object or as
a tuple (array, length), where array is an ArrayType object and
length is an integer. The user-specified length would then serve
as the length argument to the API funtion (please refer to the
product datasheet). If only the array is provided, the array's
intrinsic length is used as the argument to the underlying API
function.
Additionally, for arrays that are filled by the API function, an
integer can be passed in place of the array argument and the API
will automatically create an array of that length. All output
arrays, whether passed in or generated, are passed back in the
returned tuple."""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# devices pre-processing
__devices = isinstance(devices, int)
if __devices:
(devices, num_devices) = (array_u16(devices), devices)
else:
(devices, num_devices) = isinstance(devices, ArrayType) and (devices, len(devices)) or (devices[0], min(len(devices[0]), int(devices[1])))
if devices.typecode != 'H':
raise TypeError("type for 'devices' must be array('H')")
# unique_ids pre-processing
__unique_ids = isinstance(unique_ids, int)
if __unique_ids:
(unique_ids, num_ids) = (array_u32(unique_ids), unique_ids)
else:
(unique_ids, num_ids) = isinstance(unique_ids, ArrayType) and (unique_ids, len(unique_ids)) or (unique_ids[0], min(len(unique_ids[0]), int(unique_ids[1])))
if unique_ids.typecode != 'I':
raise TypeError("type for 'unique_ids' must be array('I')")
# Call API function
(_ret_) = api.py_aa_find_devices_ext(num_devices, num_ids, devices, unique_ids)
# devices post-processing
if __devices: del devices[max(0, min(_ret_, len(devices))):]
# unique_ids post-processing
if __unique_ids: del unique_ids[max(0, min(_ret_, len(unique_ids))):]
return (_ret_, devices, unique_ids)
# Open the Aardvark port.
#
# The port number is a zero-indexed integer.
#
# The port number is the same as that obtained from the
# aa_find_devices() function above.
#
# Returns an Aardvark handle, which is guaranteed to be
# greater than zero if it is valid.
#
# This function is recommended for use in simple applications
# where extended information is not required. For more complex
# applications, the use of aa_open_ext() is recommended.
[docs]def aa_open (port_number):
"""usage: Aardvark return = aa_open(int port_number)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_open(port_number)
# Open the Aardvark port, returning extended information
# in the supplied structure. Behavior is otherwise identical
# to aa_open() above. If 0 is passed as the pointer to the
# structure, this function is exactly equivalent to aa_open().
#
# The structure is zeroed before the open is attempted.
# It is filled with whatever information is available.
#
# For example, if the firmware version is not filled, then
# the device could not be queried for its version number.
#
# This function is recommended for use in complex applications
# where extended information is required. For more simple
# applications, the use of aa_open() is recommended.
[docs]class AardvarkExt:
def __init__ (self):
# Version matrix
self.version = AardvarkVersion()
# Features of this device.
self.features = 0
[docs]def aa_open_ext (port_number):
"""usage: (Aardvark return, AardvarkExt aa_ext) = aa_open_ext(int port_number)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
(_ret_, c_aa_ext) = api.py_aa_open_ext(port_number)
# aa_ext post-processing
aa_ext = AardvarkExt()
(aa_ext.version.software, aa_ext.version.firmware, aa_ext.version.hardware, aa_ext.version.sw_req_by_fw, aa_ext.version.fw_req_by_sw, aa_ext.version.api_req_by_sw, aa_ext.features) = c_aa_ext
return (_ret_, aa_ext)
# Close the Aardvark port.
[docs]def aa_close (aardvark):
"""usage: int return = aa_close(Aardvark aardvark)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_close(aardvark)
# Return the port for this Aardvark handle.
#
# The port number is a zero-indexed integer.
[docs]def aa_port (aardvark):
"""usage: int return = aa_port(Aardvark aardvark)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_port(aardvark)
# Return the device features as a bit-mask of values, or
# an error code if the handle is not valid.
AA_FEATURE_SPI = 0x00000001
AA_FEATURE_I2C = 0x00000002
AA_FEATURE_GPIO = 0x00000008
AA_FEATURE_I2C_MONITOR = 0x00000010
[docs]def aa_features (aardvark):
"""usage: int return = aa_features(Aardvark aardvark)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_features(aardvark)
# Return the unique ID for this Aardvark adapter.
# IDs are guaranteed to be non-zero if valid.
# The ID is the unsigned integer representation of the
# 10-digit serial number.
[docs]def aa_unique_id (aardvark):
"""usage: u32 return = aa_unique_id(Aardvark aardvark)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_unique_id(aardvark)
# Return the status string for the given status code.
# If the code is not valid or the library function cannot
# be loaded, return a NULL string.
[docs]def aa_status_string (status):
"""usage: str return = aa_status_string(int status)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_status_string(status)
# Enable logging to a file. The handle must be standard file
# descriptor. In C, a file descriptor can be obtained by using
# the ANSI C function "open" or by using the function "fileno"
# on a FILE* stream. A FILE* stream can be obtained using "fopen"
# or can correspond to the common "stdout" or "stderr" --
# available when including stdlib.h
AA_LOG_STDOUT = 1
AA_LOG_STDERR = 2
[docs]def aa_log (aardvark, level, handle):
"""usage: int return = aa_log(Aardvark aardvark, int level, int handle)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_log(aardvark, level, handle)
# Return the version matrix for the device attached to the
# given handle. If the handle is 0 or invalid, only the
# software and required api versions are set.
[docs]def aa_version (aardvark):
"""usage: (int return, AardvarkVersion version) = aa_version(Aardvark aardvark)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
(_ret_, c_version) = api.py_aa_version(aardvark)
# version post-processing
version = AardvarkVersion()
(version.software, version.firmware, version.hardware, version.sw_req_by_fw, version.fw_req_by_sw, version.api_req_by_sw) = c_version
return (_ret_, version)
# Configure the device by enabling/disabling I2C, SPI, and
# GPIO functions.
# enum AardvarkConfig
AA_CONFIG_GPIO_ONLY = 0x00
AA_CONFIG_SPI_GPIO = 0x01
AA_CONFIG_GPIO_I2C = 0x02
AA_CONFIG_SPI_I2C = 0x03
AA_CONFIG_QUERY = 0x80
AA_CONFIG_SPI_MASK = 0x00000001
AA_CONFIG_I2C_MASK = 0x00000002
return api.py_aa_configure(aardvark, config)
# Configure the target power pins.
# This is only supported on hardware versions >= 2.00
AA_TARGET_POWER_NONE = 0x00
AA_TARGET_POWER_BOTH = 0x03
AA_TARGET_POWER_QUERY = 0x80
[docs]def aa_target_power (aardvark, power_mask):
"""usage: int return = aa_target_power(Aardvark aardvark, u08 power_mask)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_target_power(aardvark, power_mask)
# Sleep for the specified number of milliseconds
# Accuracy depends on the operating system scheduler
# Returns the number of milliseconds slept
[docs]def aa_sleep_ms (milliseconds):
"""usage: u32 return = aa_sleep_ms(u32 milliseconds)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_sleep_ms(milliseconds)
#==========================================================================
# ASYNC MESSAGE POLLING
#==========================================================================
# Polling function to check if there are any asynchronous
# messages pending for processing. The function takes a timeout
# value in units of milliseconds. If the timeout is < 0, the
# function will block until data is received. If the timeout is 0,
# the function will perform a non-blocking check.
AA_ASYNC_NO_DATA = 0x00000000
AA_ASYNC_I2C_READ = 0x00000001
AA_ASYNC_I2C_WRITE = 0x00000002
AA_ASYNC_SPI = 0x00000004
AA_ASYNC_I2C_MONITOR = 0x00000008
[docs]def aa_async_poll (aardvark, timeout):
"""usage: int return = aa_async_poll(Aardvark aardvark, int timeout)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_async_poll(aardvark, timeout)
#==========================================================================
# I2C API
#==========================================================================
# Free the I2C bus.
[docs]def aa_i2c_free_bus (aardvark):
"""usage: int return = aa_i2c_free_bus(Aardvark aardvark)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_i2c_free_bus(aardvark)
# Set the I2C bit rate in kilohertz. If a zero is passed as the
# bitrate, the bitrate is unchanged and the current bitrate is
# returned.
[docs]def aa_i2c_bitrate (aardvark, bitrate_khz):
"""usage: int return = aa_i2c_bitrate(Aardvark aardvark, int bitrate_khz)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_i2c_bitrate(aardvark, bitrate_khz)
# Set the bus lock timeout. If a zero is passed as the timeout,
# the timeout is unchanged and the current timeout is returned.
[docs]def aa_i2c_bus_timeout (aardvark, timeout_ms):
"""usage: int return = aa_i2c_bus_timeout(Aardvark aardvark, u16 timeout_ms)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_i2c_bus_timeout(aardvark, timeout_ms)
# enum AardvarkI2cFlags
AA_I2C_NO_FLAGS = 0x00
AA_I2C_10_BIT_ADDR = 0x01
AA_I2C_COMBINED_FMT = 0x02
AA_I2C_NO_STOP = 0x04
AA_I2C_SIZED_READ = 0x10
AA_I2C_SIZED_READ_EXTRA1 = 0x20
# Read a stream of bytes from the I2C slave device.
[docs]def aa_i2c_read (aardvark, slave_addr, flags, data_in):
"""usage: (int return, u08[] data_in) = aa_i2c_read(Aardvark aardvark, u16 slave_addr, AardvarkI2cFlags flags, u08[] data_in)
All arrays can be passed into the API as an ArrayType object or as
a tuple (array, length), where array is an ArrayType object and
length is an integer. The user-specified length would then serve
as the length argument to the API funtion (please refer to the
product datasheet). If only the array is provided, the array's
intrinsic length is used as the argument to the underlying API
function.
Additionally, for arrays that are filled by the API function, an
integer can be passed in place of the array argument and the API
will automatically create an array of that length. All output
arrays, whether passed in or generated, are passed back in the
returned tuple."""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# data_in pre-processing
__data_in = isinstance(data_in, int)
if __data_in:
(data_in, num_bytes) = (array_u08(data_in), data_in)
else:
(data_in, num_bytes) = isinstance(data_in, ArrayType) and (data_in, len(data_in)) or (data_in[0], min(len(data_in[0]), int(data_in[1])))
if data_in.typecode != 'B':
raise TypeError("type for 'data_in' must be array('B')")
# Call API function
(_ret_) = api.py_aa_i2c_read(aardvark, slave_addr, flags, num_bytes, data_in)
# data_in post-processing
if __data_in: del data_in[max(0, min(_ret_, len(data_in))):]
return (_ret_, data_in)
# enum AardvarkI2cStatus
AA_I2C_STATUS_OK = 0
AA_I2C_STATUS_BUS_ERROR = 1
AA_I2C_STATUS_SLA_ACK = 2
AA_I2C_STATUS_SLA_NACK = 3
AA_I2C_STATUS_DATA_NACK = 4
AA_I2C_STATUS_ARB_LOST = 5
AA_I2C_STATUS_BUS_LOCKED = 6
AA_I2C_STATUS_LAST_DATA_ACK = 7
# Read a stream of bytes from the I2C slave device.
# This API function returns the number of bytes read into
# the num_read variable. The return value of the function
# is a status code.
[docs]def aa_i2c_read_ext (aardvark, slave_addr, flags, data_in):
"""usage: (int return, u08[] data_in, u16 num_read) = aa_i2c_read_ext(Aardvark aardvark, u16 slave_addr, AardvarkI2cFlags flags, u08[] data_in)
All arrays can be passed into the API as an ArrayType object or as
a tuple (array, length), where array is an ArrayType object and
length is an integer. The user-specified length would then serve
as the length argument to the API funtion (please refer to the
product datasheet). If only the array is provided, the array's
intrinsic length is used as the argument to the underlying API
function.
Additionally, for arrays that are filled by the API function, an
integer can be passed in place of the array argument and the API
will automatically create an array of that length. All output
arrays, whether passed in or generated, are passed back in the
returned tuple."""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# data_in pre-processing
__data_in = isinstance(data_in, int)
if __data_in:
(data_in, num_bytes) = (array_u08(data_in), data_in)
else:
(data_in, num_bytes) = isinstance(data_in, ArrayType) and (data_in, len(data_in)) or (data_in[0], min(len(data_in[0]), int(data_in[1])))
if data_in.typecode != 'B':
raise TypeError("type for 'data_in' must be array('B')")
# Call API function
(_ret_, num_read) = api.py_aa_i2c_read_ext(aardvark, slave_addr, flags, num_bytes, data_in)
# data_in post-processing
if __data_in: del data_in[max(0, min(num_read, len(data_in))):]
return (_ret_, data_in, num_read)
# Write a stream of bytes to the I2C slave device.
[docs]def aa_i2c_write (aardvark, slave_addr, flags, data_out):
"""usage: int return = aa_i2c_write(Aardvark aardvark, u16 slave_addr, AardvarkI2cFlags flags, u08[] data_out)
All arrays can be passed into the API as an ArrayType object or as
a tuple (array, length), where array is an ArrayType object and
length is an integer. The user-specified length would then serve
as the length argument to the API funtion (please refer to the
product datasheet). If only the array is provided, the array's
intrinsic length is used as the argument to the underlying API
function."""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# data_out pre-processing
(data_out, num_bytes) = isinstance(data_out, ArrayType) and (data_out, len(data_out)) or (data_out[0], min(len(data_out[0]), int(data_out[1])))
if data_out.typecode != 'B':
raise TypeError("type for 'data_out' must be array('B')")
# Call API function
return api.py_aa_i2c_write(aardvark, slave_addr, flags, num_bytes, data_out)
# Write a stream of bytes to the I2C slave device.
# This API function returns the number of bytes written into
# the num_written variable. The return value of the function
# is a status code.
[docs]def aa_i2c_write_ext (aardvark, slave_addr, flags, data_out):
"""usage: (int return, u16 num_written) = aa_i2c_write_ext(Aardvark aardvark, u16 slave_addr, AardvarkI2cFlags flags, u08[] data_out)
All arrays can be passed into the API as an ArrayType object or as
a tuple (array, length), where array is an ArrayType object and
length is an integer. The user-specified length would then serve
as the length argument to the API funtion (please refer to the
product datasheet). If only the array is provided, the array's
intrinsic length is used as the argument to the underlying API
function."""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# data_out pre-processing
(data_out, num_bytes) = isinstance(data_out, ArrayType) and (data_out, len(data_out)) or (data_out[0], min(len(data_out[0]), int(data_out[1])))
if data_out.typecode != 'B':
raise TypeError("type for 'data_out' must be array('B')")
# Call API function
return api.py_aa_i2c_write_ext(aardvark, slave_addr, flags, num_bytes, data_out)
# Do an atomic write+read to an I2C slave device by first
# writing a stream of bytes to the I2C slave device and then
# reading a stream of bytes back from the same slave device.
# This API function returns the number of bytes written into
# the num_written variable and the number of bytes read into
# the num_read variable. The return value of the function is
# the status given as (read_status << 8) | (write_status).
[docs]def aa_i2c_write_read (aardvark, slave_addr, flags, out_data, in_data):
"""usage: (int return, u16 num_written, u08[] in_data, u16 num_read) = aa_i2c_write_read(Aardvark aardvark, u16 slave_addr, AardvarkI2cFlags flags, u08[] out_data, u08[] in_data)
All arrays can be passed into the API as an ArrayType object or as
a tuple (array, length), where array is an ArrayType object and
length is an integer. The user-specified length would then serve
as the length argument to the API funtion (please refer to the
product datasheet). If only the array is provided, the array's
intrinsic length is used as the argument to the underlying API
function.
Additionally, for arrays that are filled by the API function, an
integer can be passed in place of the array argument and the API
will automatically create an array of that length. All output
arrays, whether passed in or generated, are passed back in the
returned tuple."""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# out_data pre-processing
(out_data, out_num_bytes) = isinstance(out_data, ArrayType) and (out_data, len(out_data)) or (out_data[0], min(len(out_data[0]), int(out_data[1])))
if out_data.typecode != 'B':
raise TypeError("type for 'out_data' must be array('B')")
# in_data pre-processing
__in_data = isinstance(in_data, int)
if __in_data:
(in_data, in_num_bytes) = (array_u08(in_data), in_data)
else:
(in_data, in_num_bytes) = isinstance(in_data, ArrayType) and (in_data, len(in_data)) or (in_data[0], min(len(in_data[0]), int(in_data[1])))
if in_data.typecode != 'B':
raise TypeError("type for 'in_data' must be array('B')")
# Call API function
(_ret_, num_written, num_read) = api.py_aa_i2c_write_read(aardvark, slave_addr, flags, out_num_bytes, out_data, in_num_bytes, in_data)
# in_data post-processing
if __in_data: del in_data[max(0, min(num_read, len(in_data))):]
return (_ret_, num_written, in_data, num_read)
# Enable/Disable the Aardvark as an I2C slave device
[docs]def aa_i2c_slave_enable (aardvark, addr, maxTxBytes, maxRxBytes):
"""usage: int return = aa_i2c_slave_enable(Aardvark aardvark, u08 addr, u16 maxTxBytes, u16 maxRxBytes)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_i2c_slave_enable(aardvark, addr, maxTxBytes, maxRxBytes)
[docs]def aa_i2c_slave_disable (aardvark):
"""usage: int return = aa_i2c_slave_disable(Aardvark aardvark)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_i2c_slave_disable(aardvark)
# Set the slave response in the event the Aardvark is put
# into slave mode and contacted by a Master.
[docs]def aa_i2c_slave_set_response (aardvark, data_out):
"""usage: int return = aa_i2c_slave_set_response(Aardvark aardvark, u08[] data_out)
All arrays can be passed into the API as an ArrayType object or as
a tuple (array, length), where array is an ArrayType object and
length is an integer. The user-specified length would then serve
as the length argument to the API funtion (please refer to the
product datasheet). If only the array is provided, the array's
intrinsic length is used as the argument to the underlying API
function."""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# data_out pre-processing
(data_out, num_bytes) = isinstance(data_out, ArrayType) and (data_out, len(data_out)) or (data_out[0], min(len(data_out[0]), int(data_out[1])))
if data_out.typecode != 'B':
raise TypeError("type for 'data_out' must be array('B')")
# Call API function
return api.py_aa_i2c_slave_set_response(aardvark, num_bytes, data_out)
# Return number of bytes written from a previous
# Aardvark->I2C_master transmission. Since the transmission is
# happening asynchronously with respect to the PC host
# software, there could be responses queued up from many
# previous write transactions.
[docs]def aa_i2c_slave_write_stats (aardvark):
"""usage: int return = aa_i2c_slave_write_stats(Aardvark aardvark)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_i2c_slave_write_stats(aardvark)
# Read the bytes from an I2C slave reception
[docs]def aa_i2c_slave_read (aardvark, data_in):
"""usage: (int return, u08 addr, u08[] data_in) = aa_i2c_slave_read(Aardvark aardvark, u08[] data_in)
All arrays can be passed into the API as an ArrayType object or as
a tuple (array, length), where array is an ArrayType object and
length is an integer. The user-specified length would then serve
as the length argument to the API funtion (please refer to the
product datasheet). If only the array is provided, the array's
intrinsic length is used as the argument to the underlying API
function.
Additionally, for arrays that are filled by the API function, an
integer can be passed in place of the array argument and the API
will automatically create an array of that length. All output
arrays, whether passed in or generated, are passed back in the
returned tuple."""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# data_in pre-processing
__data_in = isinstance(data_in, int)
if __data_in:
(data_in, num_bytes) = (array_u08(data_in), data_in)
else:
(data_in, num_bytes) = isinstance(data_in, ArrayType) and (data_in, len(data_in)) or (data_in[0], min(len(data_in[0]), int(data_in[1])))
if data_in.typecode != 'B':
raise TypeError("type for 'data_in' must be array('B')")
# Call API function
(_ret_, addr) = api.py_aa_i2c_slave_read(aardvark, num_bytes, data_in)
# data_in post-processing
if __data_in: del data_in[max(0, min(_ret_, len(data_in))):]
return (_ret_, addr, data_in)
# Extended functions that return status code
[docs]def aa_i2c_slave_write_stats_ext (aardvark):
"""usage: (int return, u16 num_written) = aa_i2c_slave_write_stats_ext(Aardvark aardvark)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_i2c_slave_write_stats_ext(aardvark)
[docs]def aa_i2c_slave_read_ext (aardvark, data_in):
"""usage: (int return, u08 addr, u08[] data_in, u16 num_read) = aa_i2c_slave_read_ext(Aardvark aardvark, u08[] data_in)
All arrays can be passed into the API as an ArrayType object or as
a tuple (array, length), where array is an ArrayType object and
length is an integer. The user-specified length would then serve
as the length argument to the API funtion (please refer to the
product datasheet). If only the array is provided, the array's
intrinsic length is used as the argument to the underlying API
function.
Additionally, for arrays that are filled by the API function, an
integer can be passed in place of the array argument and the API
will automatically create an array of that length. All output
arrays, whether passed in or generated, are passed back in the
returned tuple."""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# data_in pre-processing
__data_in = isinstance(data_in, int)
if __data_in:
(data_in, num_bytes) = (array_u08(data_in), data_in)
else:
(data_in, num_bytes) = isinstance(data_in, ArrayType) and (data_in, len(data_in)) or (data_in[0], min(len(data_in[0]), int(data_in[1])))
if data_in.typecode != 'B':
raise TypeError("type for 'data_in' must be array('B')")
# Call API function
(_ret_, addr, num_read) = api.py_aa_i2c_slave_read_ext(aardvark, num_bytes, data_in)
# data_in post-processing
if __data_in: del data_in[max(0, min(num_read, len(data_in))):]
return (_ret_, addr, data_in, num_read)
# Enable the I2C bus monitor
# This disables all other functions on the Aardvark adapter
[docs]def aa_i2c_monitor_enable (aardvark):
"""usage: int return = aa_i2c_monitor_enable(Aardvark aardvark)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_i2c_monitor_enable(aardvark)
# Disable the I2C bus monitor
[docs]def aa_i2c_monitor_disable (aardvark):
"""usage: int return = aa_i2c_monitor_disable(Aardvark aardvark)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_i2c_monitor_disable(aardvark)
# Read the data collected by the bus monitor
AA_I2C_MONITOR_DATA = 0x00ff
AA_I2C_MONITOR_NACK = 0x0100
AA_I2C_MONITOR_CMD_START = 0xff00
AA_I2C_MONITOR_CMD_STOP = 0xff01
[docs]def aa_i2c_monitor_read (aardvark, data):
"""usage: (int return, u16[] data) = aa_i2c_monitor_read(Aardvark aardvark, u16[] data)
All arrays can be passed into the API as an ArrayType object or as
a tuple (array, length), where array is an ArrayType object and
length is an integer. The user-specified length would then serve
as the length argument to the API funtion (please refer to the
product datasheet). If only the array is provided, the array's
intrinsic length is used as the argument to the underlying API
function.
Additionally, for arrays that are filled by the API function, an
integer can be passed in place of the array argument and the API
will automatically create an array of that length. All output
arrays, whether passed in or generated, are passed back in the
returned tuple."""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# data pre-processing
__data = isinstance(data, int)
if __data:
(data, num_bytes) = (array_u16(data), data)
else:
(data, num_bytes) = isinstance(data, ArrayType) and (data, len(data)) or (data[0], min(len(data[0]), int(data[1])))
if data.typecode != 'H':
raise TypeError("type for 'data' must be array('H')")
# Call API function
(_ret_) = api.py_aa_i2c_monitor_read(aardvark, num_bytes, data)
# data post-processing
if __data: del data[max(0, min(_ret_, len(data))):]
return (_ret_, data)
# Configure the I2C pullup resistors.
# This is only supported on hardware versions >= 2.00
AA_I2C_PULLUP_NONE = 0x00
AA_I2C_PULLUP_BOTH = 0x03
AA_I2C_PULLUP_QUERY = 0x80
[docs]def aa_i2c_pullup (aardvark, pullup_mask):
"""usage: int return = aa_i2c_pullup(Aardvark aardvark, u08 pullup_mask)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_i2c_pullup(aardvark, pullup_mask)
#==========================================================================
# SPI API
#==========================================================================
# Set the SPI bit rate in kilohertz. If a zero is passed as the
# bitrate, the bitrate is unchanged and the current bitrate is
# returned.
[docs]def aa_spi_bitrate (aardvark, bitrate_khz):
"""usage: int return = aa_spi_bitrate(Aardvark aardvark, int bitrate_khz)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_spi_bitrate(aardvark, bitrate_khz)
# These configuration parameters specify how to clock the
# bits that are sent and received on the Aardvark SPI
# interface.
#
# The polarity option specifies which transition
# constitutes the leading edge and which transition is the
# falling edge. For example, AA_SPI_POL_RISING_FALLING
# would configure the SPI to idle the SCK clock line low.
# The clock would then transition low-to-high on the
# leading edge and high-to-low on the trailing edge.
#
# The phase option determines whether to sample or setup on
# the leading edge. For example, AA_SPI_PHASE_SAMPLE_SETUP
# would configure the SPI to sample on the leading edge and
# setup on the trailing edge.
#
# The bitorder option is used to indicate whether LSB or
# MSB is shifted first.
#
# See the diagrams in the Aardvark datasheet for
# more details.
# enum AardvarkSpiPolarity
AA_SPI_POL_RISING_FALLING = 0
AA_SPI_POL_FALLING_RISING = 1
# enum AardvarkSpiPhase
AA_SPI_PHASE_SAMPLE_SETUP = 0
AA_SPI_PHASE_SETUP_SAMPLE = 1
# enum AardvarkSpiBitorder
AA_SPI_BITORDER_MSB = 0
AA_SPI_BITORDER_LSB = 1
# Configure the SPI master or slave interface
return api.py_aa_spi_configure(aardvark, polarity, phase, bitorder)
# Write a stream of bytes to the downstream SPI slave device.
[docs]def aa_spi_write (aardvark, data_out, data_in):
"""usage: (int return, u08[] data_in) = aa_spi_write(Aardvark aardvark, u08[] data_out, u08[] data_in)
All arrays can be passed into the API as an ArrayType object or as
a tuple (array, length), where array is an ArrayType object and
length is an integer. The user-specified length would then serve
as the length argument to the API funtion (please refer to the
product datasheet). If only the array is provided, the array's
intrinsic length is used as the argument to the underlying API
function.
Additionally, for arrays that are filled by the API function, an
integer can be passed in place of the array argument and the API
will automatically create an array of that length. All output
arrays, whether passed in or generated, are passed back in the
returned tuple."""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# data_out pre-processing
(data_out, out_num_bytes) = isinstance(data_out, ArrayType) and (data_out, len(data_out)) or (data_out[0], min(len(data_out[0]), int(data_out[1])))
if data_out.typecode != 'B':
raise TypeError("type for 'data_out' must be array('B')")
# data_in pre-processing
__data_in = isinstance(data_in, int)
if __data_in:
(data_in, in_num_bytes) = (array_u08(data_in), data_in)
else:
(data_in, in_num_bytes) = isinstance(data_in, ArrayType) and (data_in, len(data_in)) or (data_in[0], min(len(data_in[0]), int(data_in[1])))
if data_in.typecode != 'B':
raise TypeError("type for 'data_in' must be array('B')")
# Call API function
(_ret_) = api.py_aa_spi_write(aardvark, out_num_bytes, data_out, in_num_bytes, data_in)
# data_in post-processing
if __data_in: del data_in[max(0, min(_ret_, len(data_in))):]
return (_ret_, data_in)
# Enable/Disable the Aardvark as an SPI slave device
[docs]def aa_spi_slave_enable (aardvark):
"""usage: int return = aa_spi_slave_enable(Aardvark aardvark)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_spi_slave_enable(aardvark)
[docs]def aa_spi_slave_disable (aardvark):
"""usage: int return = aa_spi_slave_disable(Aardvark aardvark)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_spi_slave_disable(aardvark)
# Set the slave response in the event the Aardvark is put
# into slave mode and contacted by a Master.
[docs]def aa_spi_slave_set_response (aardvark, data_out):
"""usage: int return = aa_spi_slave_set_response(Aardvark aardvark, u08[] data_out)
All arrays can be passed into the API as an ArrayType object or as
a tuple (array, length), where array is an ArrayType object and
length is an integer. The user-specified length would then serve
as the length argument to the API funtion (please refer to the
product datasheet). If only the array is provided, the array's
intrinsic length is used as the argument to the underlying API
function."""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# data_out pre-processing
(data_out, num_bytes) = isinstance(data_out, ArrayType) and (data_out, len(data_out)) or (data_out[0], min(len(data_out[0]), int(data_out[1])))
if data_out.typecode != 'B':
raise TypeError("type for 'data_out' must be array('B')")
# Call API function
return api.py_aa_spi_slave_set_response(aardvark, num_bytes, data_out)
# Read the bytes from an SPI slave reception
[docs]def aa_spi_slave_read (aardvark, data_in):
"""usage: (int return, u08[] data_in) = aa_spi_slave_read(Aardvark aardvark, u08[] data_in)
All arrays can be passed into the API as an ArrayType object or as
a tuple (array, length), where array is an ArrayType object and
length is an integer. The user-specified length would then serve
as the length argument to the API funtion (please refer to the
product datasheet). If only the array is provided, the array's
intrinsic length is used as the argument to the underlying API
function.
Additionally, for arrays that are filled by the API function, an
integer can be passed in place of the array argument and the API
will automatically create an array of that length. All output
arrays, whether passed in or generated, are passed back in the
returned tuple."""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# data_in pre-processing
__data_in = isinstance(data_in, int)
if __data_in:
(data_in, num_bytes) = (array_u08(data_in), data_in)
else:
(data_in, num_bytes) = isinstance(data_in, ArrayType) and (data_in, len(data_in)) or (data_in[0], min(len(data_in[0]), int(data_in[1])))
if data_in.typecode != 'B':
raise TypeError("type for 'data_in' must be array('B')")
# Call API function
(_ret_) = api.py_aa_spi_slave_read(aardvark, num_bytes, data_in)
# data_in post-processing
if __data_in: del data_in[max(0, min(_ret_, len(data_in))):]
return (_ret_, data_in)
# Change the output polarity on the SS line.
#
# Note: When configured as an SPI slave, the Aardvark will
# always be setup with SS as active low. Hence this function
# only affects the SPI master functions on the Aardvark.
# enum AardvarkSpiSSPolarity
AA_SPI_SS_ACTIVE_LOW = 0
AA_SPI_SS_ACTIVE_HIGH = 1
[docs]def aa_spi_master_ss_polarity (aardvark, polarity):
"""usage: int return = aa_spi_master_ss_polarity(Aardvark aardvark, AardvarkSpiSSPolarity polarity)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_spi_master_ss_polarity(aardvark, polarity)
#==========================================================================
# GPIO API
#==========================================================================
# The following enumerated type maps the named lines on the
# Aardvark I2C/SPI line to bit positions in the GPIO API.
# All GPIO API functions will index these lines through an
# 8-bit masked value. Thus, each bit position in the mask
# can be referred back its corresponding line through the
# enumerated type.
# enum AardvarkGpioBits
AA_GPIO_SCL = 0x01
AA_GPIO_SDA = 0x02
AA_GPIO_MISO = 0x04
AA_GPIO_SCK = 0x08
AA_GPIO_MOSI = 0x10
AA_GPIO_SS = 0x20
# Configure the GPIO, specifying the direction of each bit.
#
# A call to this function will not change the value of the pullup
# mask in the Aardvark. This is illustrated by the following
# example:
# (1) Direction mask is first set to 0x00
# (2) Pullup is set to 0x01
# (3) Direction mask is set to 0x01
# (4) Direction mask is later set back to 0x00.
#
# The pullup will be active after (4).
#
# On Aardvark power-up, the default value of the direction
# mask is 0x00.
AA_GPIO_DIR_INPUT = 0
AA_GPIO_DIR_OUTPUT = 1
[docs]def aa_gpio_direction (aardvark, direction_mask):
"""usage: int return = aa_gpio_direction(Aardvark aardvark, u08 direction_mask)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_gpio_direction(aardvark, direction_mask)
# Enable an internal pullup on any of the GPIO input lines.
#
# Note: If a line is configured as an output, the pullup bit
# for that line will be ignored, though that pullup bit will
# be cached in case the line is later configured as an input.
#
# By default the pullup mask is 0x00.
AA_GPIO_PULLUP_OFF = 0
AA_GPIO_PULLUP_ON = 1
[docs]def aa_gpio_pullup (aardvark, pullup_mask):
"""usage: int return = aa_gpio_pullup(Aardvark aardvark, u08 pullup_mask)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_gpio_pullup(aardvark, pullup_mask)
# Read the current digital values on the GPIO input lines.
#
# The bits will be ordered as described by AA_GPIO_BITS. If a
# line is configured as an output, its corresponding bit
# position in the mask will be undefined.
[docs]def aa_gpio_get (aardvark):
"""usage: int return = aa_gpio_get(Aardvark aardvark)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_gpio_get(aardvark)
# Set the outputs on the GPIO lines.
#
# Note: If a line is configured as an input, it will not be
# affected by this call, but the output value for that line
# will be cached in the event that the line is later
# configured as an output.
[docs]def aa_gpio_set (aardvark, value):
"""usage: int return = aa_gpio_set(Aardvark aardvark, u08 value)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_gpio_set(aardvark, value)
# Block until there is a change on the GPIO input lines.
# Pins configured as outputs will be ignored.
#
# The function will return either when a change has occurred or
# the timeout expires. The timeout, specified in millisecods, has
# a precision of ~16 ms. The maximum allowable timeout is
# approximately 4 seconds. If the timeout expires, this function
# will return the current state of the GPIO lines.
#
# This function will return immediately with the current value
# of the GPIO lines for the first invocation after any of the
# following functions are called: aa_configure,
# aa_gpio_direction, or aa_gpio_pullup.
#
# If the function aa_gpio_get is called before calling
# aa_gpio_change, aa_gpio_change will only register any changes
# from the value last returned by aa_gpio_get.
[docs]def aa_gpio_change (aardvark, timeout):
"""usage: int return = aa_gpio_change(Aardvark aardvark, u16 timeout)"""
if not AA_LIBRARY_LOADED: return AA_INCOMPATIBLE_LIBRARY
# Call API function
return api.py_aa_gpio_change(aardvark, timeout)