101 lines
2.5 KiB
C++
101 lines
2.5 KiB
C++
/*
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* Copyright (C) EdgeTX
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*
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* Based on code named
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* opentx - https://github.com/opentx/opentx
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* th9x - http://code.google.com/p/th9x
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* er9x - http://code.google.com/p/er9x
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* gruvin9x - http://code.google.com/p/gruvin9x
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*
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* License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
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*
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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 version 2 as
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* published by the Free Software Foundation.
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*
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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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*/
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#include "opentx.h"
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#define _USE_MATH_DEFINES
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#include <math.h>
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#define ACC_LSB_VALUE 0.000488 // 0.488 mg/LSB
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#define ALPHA 0.98
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#define DT 0.01
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#define SCALE_FACT_ACC 0.005
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#define SCALE_FACT_GYRO 0.0078 // 250deg/s / 32000
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Gyro gyro;
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static float deg2RESX(float deg)
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{
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// [-90 : 90] -> [-RESX : RESX]
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return (deg * float(RESX)) / 90.0;
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}
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void Gyro::wakeup()
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{
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static tmr10ms_t gyroWakeupTime = 0;
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tmr10ms_t now = get_tmr10ms();
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if (errors >= 100 || now < gyroWakeupTime)
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return;
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gyroWakeupTime = now + 1; /* 10ms default */
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int16_t values[IMU_VALUES_COUNT];
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if (gyroRead((uint8_t*)values) < 0) {
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++errors;
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return;
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}
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int16_t gx = values[0];
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int16_t gy = values[1];
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// int16_t gz = values[2];
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int16_t ax = values[3];
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int16_t ay = values[4];
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int16_t az = values[5];
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// integrate gyro
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roll -= gx * SCALE_FACT_GYRO * DT;
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pitch += gy * SCALE_FACT_GYRO * DT;
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int32_t magn = abs(ax) + abs(ay) + abs(az);
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if (magn > 8192 && magn < 32768) {
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if (az < 0) az = -az;
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float rollAcc = atan2f((float)ay,(float)az) * 57.3 /* 180/PI */;
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float pitchAcc = atan2f((float)ax,(float)az) * 57.3 /* 180/PI */;
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roll = roll * ALPHA + rollAcc * (1.0-ALPHA);
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pitch = pitch * ALPHA + pitchAcc * (1.0-ALPHA);
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}
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outputs[0] = deg2RESX(roll);
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outputs[1] = deg2RESX(pitch);
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}
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int16_t Gyro::scaledX()
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{
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// return limit(-RESX,
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// (int)(outputs[0] - g_eeGeneral.imuOffset * RESX / 180) *
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// (180 / (IMU_MAX_DEFAULT + g_eeGeneral.imuMax)),
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// RESX);
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return limit<int16_t>(-RESX, outputs[0], RESX);
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}
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int16_t Gyro::scaledY()
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{
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// return limit(-RESX,
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// outputs[1] * (180 / (IMU_MAX_DEFAULT + g_eeGeneral.imuMax)),
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// RESX);
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return limit<int16_t>(-RESX, outputs[1], RESX);
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}
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