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send pwm outputs to simulator

This commit is contained in:
tumbili 2015-05-12 23:55:32 +02:00
parent 3a79679e2d
commit 9686f8004e
1 changed files with 39 additions and 14 deletions
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53
src/modules/simulator/simulator_mavlink.cpp
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@ -35,10 +35,11 @@
#include <px4_time.h>
#include "simulator.h"
#include "errno.h"
#include <drivers/drv_pwm_output.h>
using namespace simulator;
#define SEND_INTERVAL 1000
#define SEND_INTERVAL 20
#define UDP_PORT 14550
#define PIXHAWK_DEVICE "/dev/ttyACM0"
@ -46,22 +47,46 @@ static const uint8_t mavlink_message_lengths[256] = MAVLINK_MESSAGE_LENGTHS;
static const uint8_t mavlink_message_crcs[256] = MAVLINK_MESSAGE_CRCS;
void Simulator::pack_actuator_message(mavlink_message_t *msg) {
// pack message and send
mavlink_servo_output_raw_t actuator_msg;
float out[8];
const float pwm_center = (PWM_HIGHEST_MAX + PWM_LOWEST_MIN) / 2;
// for now we only support quadrotors
unsigned n = 4;
for (unsigned i = 0; i < 8; i++) {
if (_actuators.output[i] > PWM_LOWEST_MIN / 2) {
if (i < n) {
// scale PWM out 900..2100 us to 0..1 for rotors */
out[i] = (_actuators.output[i] - PWM_LOWEST_MIN) / (PWM_HIGHEST_MAX - PWM_LOWEST_MIN);
} else {
// scale PWM out 900..2100 us to -1..1 for other channels */
out[i] = (_actuators.output[i] - pwm_center) / ((PWM_HIGHEST_MAX - PWM_LOWEST_MIN) / 2);
}
} else {
// send 0 when disarmed and for disabled channels */
out[i] = 0.0f;
}
}
mavlink_hil_controls_t actuator_msg;
actuator_msg.time_usec = hrt_absolute_time();
actuator_msg.port = 8; // hardcoded for now
actuator_msg.servo1_raw = _actuators.output[0];
actuator_msg.servo2_raw = _actuators.output[1];
actuator_msg.servo3_raw = _actuators.output[2];
actuator_msg.servo4_raw = _actuators.output[3];
actuator_msg.servo5_raw = _actuators.output[4];
actuator_msg.servo6_raw = _actuators.output[5];
actuator_msg.servo7_raw = _actuators.output[6];
actuator_msg.servo8_raw = _actuators.output[7];
actuator_msg.roll_ailerons = out[0];
actuator_msg.pitch_elevator = out[1];
actuator_msg.yaw_rudder = out[2];
actuator_msg.throttle = out[3];
actuator_msg.aux1 = out[4];
actuator_msg.aux2 = out[5];
actuator_msg.aux3 = out[6];
actuator_msg.aux4 = out[7];
actuator_msg.mode = 0; // need to put something here
actuator_msg.nav_mode = 0;
// encode the message
mavlink_msg_servo_output_raw_encode(1, 100, msg, &actuator_msg);
mavlink_msg_hil_controls_encode(1, MAVLINK_MSG_ID_HIL_CONTROLS, msg, &actuator_msg);
}
void Simulator::send_data() {
@ -71,7 +96,7 @@ void Simulator::send_data() {
_time_last = time_now;
mavlink_message_t msg;
pack_actuator_message(&msg);
send_mavlink_message(MAVLINK_MSG_ID_SERVO_OUTPUT_RAW, &msg, 200);
send_mavlink_message(MAVLINK_MSG_ID_HIL_CONTROLS, &msg, 200);
// can add more messages here, can also setup different timings
}
}