openpilot is an open source driver assistance system. openpilot performs the functions of Automated Lane Centering and Adaptive Cruise Control for over 200 supported car makes and models.
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#include <sys/resource.h>
#include <chrono>
#include <thread>
#include <vector>
#include "cereal/messaging/messaging.h"
#include "common/i2c.h"
#include "common/swaglog.h"
#include "common/timing.h"
#include "common/util.h"
#include "selfdrive/sensord/sensors/bmx055_accel.h"
#include "selfdrive/sensord/sensors/bmx055_gyro.h"
#include "selfdrive/sensord/sensors/bmx055_magn.h"
#include "selfdrive/sensord/sensors/bmx055_temp.h"
#include "selfdrive/sensord/sensors/constants.h"
#include "selfdrive/sensord/sensors/light_sensor.h"
#include "selfdrive/sensord/sensors/lsm6ds3_accel.h"
#include "selfdrive/sensord/sensors/lsm6ds3_gyro.h"
#include "selfdrive/sensord/sensors/lsm6ds3_temp.h"
#include "selfdrive/sensord/sensors/mmc5603nj_magn.h"
#include "selfdrive/sensord/sensors/sensor.h"
#define I2C_BUS_IMU 1
ExitHandler do_exit;
int sensor_loop() {
I2CBus *i2c_bus_imu;
try {
i2c_bus_imu = new I2CBus(I2C_BUS_IMU);
} catch (std::exception &e) {
LOGE("I2CBus init failed");
return -1;
}
BMX055_Accel bmx055_accel(i2c_bus_imu);
BMX055_Gyro bmx055_gyro(i2c_bus_imu);
BMX055_Magn bmx055_magn(i2c_bus_imu);
BMX055_Temp bmx055_temp(i2c_bus_imu);
LSM6DS3_Accel lsm6ds3_accel(i2c_bus_imu);
LSM6DS3_Gyro lsm6ds3_gyro(i2c_bus_imu);
LSM6DS3_Temp lsm6ds3_temp(i2c_bus_imu);
MMC5603NJ_Magn mmc5603nj_magn(i2c_bus_imu);
LightSensor light("/sys/class/i2c-adapter/i2c-2/2-0038/iio:device1/in_intensity_both_raw");
// Sensor init
std::vector<std::pair<Sensor *, bool>> sensors_init; // Sensor, required
sensors_init.push_back({&bmx055_accel, false});
sensors_init.push_back({&bmx055_gyro, false});
sensors_init.push_back({&bmx055_magn, false});
sensors_init.push_back({&bmx055_temp, false});
sensors_init.push_back({&lsm6ds3_accel, true});
sensors_init.push_back({&lsm6ds3_gyro, true});
sensors_init.push_back({&lsm6ds3_temp, true});
sensors_init.push_back({&mmc5603nj_magn, false});
sensors_init.push_back({&light, true});
bool has_magnetometer = false;
// Initialize sensors
std::vector<Sensor *> sensors;
for (auto &sensor : sensors_init) {
int err = sensor.first->init();
if (err < 0) {
// Fail on required sensors
if (sensor.second) {
LOGE("Error initializing sensors");
return -1;
}
} else {
if (sensor.first == &bmx055_magn || sensor.first == &mmc5603nj_magn) {
has_magnetometer = true;
}
sensors.push_back(sensor.first);
}
}
if (!has_magnetometer) {
LOGE("No magnetometer present");
return -1;
}
PubMaster pm({"sensorEvents"});
while (!do_exit) {
std::chrono::steady_clock::time_point begin = std::chrono::steady_clock::now();
const int num_events = sensors.size();
MessageBuilder msg;
auto sensor_events = msg.initEvent().initSensorEvents(num_events);
for (int i = 0; i < num_events; i++) {
auto event = sensor_events[i];
sensors[i]->get_event(event);
}
pm.send("sensorEvents", msg);
std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now();
std::this_thread::sleep_for(std::chrono::milliseconds(10) - (end - begin));
}
return 0;
}
int main(int argc, char *argv[]) {
setpriority(PRIO_PROCESS, 0, -18);
return sensor_loop();
}