mirror of https://github.com/ArduPilot/ardupilot
84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
/*
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* AP_IRLock_PX4.cpp
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*
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* Created on: Nov 16, 2014
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* Author: MLandes
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*/
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#include <AP_HAL/AP_HAL.h>
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#if CONFIG_HAL_BOARD == HAL_BOARD_PX4 || CONFIG_HAL_BOARD == HAL_BOARD_VRBRAIN
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#include "AP_IRLock_PX4.h"
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#include <fcntl.h>
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#include <unistd.h>
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#include "drivers/drv_irlock.h"
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extern const AP_HAL::HAL& hal;
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AP_IRLock_PX4::AP_IRLock_PX4() :
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_fd(0),
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_last_timestamp(0)
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{}
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void AP_IRLock_PX4::init()
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{
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_fd = open(IRLOCK0_DEVICE_PATH, O_RDONLY);
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if (_fd < 0) {
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hal.console->printf("Unable to open " IRLOCK0_DEVICE_PATH "\n");
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return;
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}
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_flags.healthy = true;
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}
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// retrieve latest sensor data - returns true if new data is available
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bool AP_IRLock_PX4::update()
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{
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// return immediately if not healthy
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if (!_flags.healthy) {
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return false;
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}
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// read position of all objects
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struct irlock_s report;
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uint16_t count = 0;
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while(::read(_fd, &report, sizeof(struct irlock_s)) == sizeof(struct irlock_s) && report.timestamp >_last_timestamp) {
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_target_info[count].timestamp = report.timestamp;
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_target_info[count].target_num = report.target_num;
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_target_info[count].angle_x = report.angle_x;
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_target_info[count].angle_y = report.angle_y;
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_target_info[count].size_x = report.size_x;
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_target_info[count].size_y = report.size_y;
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count++;
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_last_timestamp = report.timestamp;
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_last_update = hal.scheduler->millis();
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}
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// update num_blocks and implement timeout
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if (count > 0) {
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_num_targets = count;
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} else if ((hal.scheduler->millis() - _last_update) > IRLOCK_TIMEOUT_MS) {
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_num_targets = 0;
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}
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// return true if new data found
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return (_num_targets > 0);
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}
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#endif // CONFIG_HAL_BOARD == HAL_BOARD_PX4
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