i2c.cpp
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/****************************************************************************
*
* Copyright (C) 2020 PX4 Development Team. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name PX4 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.
*
****************************************************************************/
#include <board_config.h>
#ifndef BOARD_DISABLE_I2C_SPI
#include <px4_platform_common/i2c.h>
#ifndef BOARD_OVERRIDE_I2C_BUS_EXTERNAL
bool px4_i2c_bus_external(const px4_i2c_bus_t &bus)
{
return bus.is_external;
}
#endif
bool I2CBusIterator::next()
{
while (++_index < I2C_BUS_MAX_BUS_ITEMS && px4_i2c_buses[_index].bus != -1) {
const px4_i2c_bus_t &bus_data = px4_i2c_buses[_index];
if (!board_has_bus(BOARD_I2C_BUS, bus_data.bus)) {
continue;
}
switch (_filter) {
case FilterType::All:
if (_bus == bus_data.bus || _bus == -1) {
return true;
}
break;
case FilterType::InternalBus:
if (!px4_i2c_bus_external(bus_data)) {
if (_bus == bus_data.bus || _bus == -1) {
return true;
}
}
break;
case FilterType::ExternalBus:
if (px4_i2c_bus_external(bus_data)) {
++_external_bus_counter;
if (_bus == bus_data.bus || _bus == -1) {
return true;
}
}
break;
}
}
return false;
}
#endif /* BOARD_DISABLE_I2C_SPI */