imu_umarim.c

Go to the documentation of this file.

/*
 * Copyright (C) 2011 Gautier Hattenberger
 * Derived from Aspirin and ppzuavimu drivers
 *
 * This file is part of paparazzi.
 *
 * paparazzi is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * paparazzi is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with paparazzi; see the file COPYING.  If not, write to
 * the Free Software Foundation, 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */
 
#include <math.h>
#include "imu_umarim.h"
#include "mcu_periph/i2c.h"
#include "generated/airframe.h"
#include "subsystems/abi.h"
 
// Downlink
#include "mcu_periph/uart.h"
#include "pprzlink/messages.h"
#include "subsystems/datalink/downlink.h"
 
 
#ifndef UMARIM_ACCEL_RANGE
#define UMARIM_ACCEL_RANGE ADXL345_RANGE_16G
#endif
PRINT_CONFIG_VAR(UMARIM_ACCEL_RANGE)
 
#ifndef UMARIM_ACCEL_RATE
#define UMARIM_ACCEL_RATE ADXL345_RATE_50HZ
#endif
PRINT_CONFIG_VAR(UMARIM_ACCEL_RATE)
 
 
/* default gyro internal lowpass frequency and sample rate divider */
#if !defined UMARIM_GYRO_LOWPASS && !defined  UMARIM_GYRO_SMPLRT_DIV
#define UMARIM_GYRO_LOWPASS ITG3200_DLPF_20HZ
#define UMARIM_GYRO_SMPLRT_DIV 19
PRINT_CONFIG_MSG("Gyro output rate is 50Hz")
#endif
PRINT_CONFIG_VAR(UMARIM_GYRO_LOWPASS)
PRINT_CONFIG_VAR(UMARIM_GYRO_SMPLRT_DIV)
 
struct ImuUmarim imu_umarim;
 
void imu_umarim_init(void)
{
  // ITG3200
  itg3200_init(&imu_umarim.itg, &(IMU_UMARIM_I2C_DEV), ITG3200_ADDR_ALT);
  // change the default configuration
  imu_umarim.itg.config.smplrt_div = UMARIM_GYRO_SMPLRT_DIV;
  imu_umarim.itg.config.dlpf_cfg = UMARIM_GYRO_LOWPASS;
 
  // ADXL345
  adxl345_i2c_init(&imu_umarim.adxl, &(IMU_UMARIM_I2C_DEV), ADXL345_ADDR_ALT);
  // change the default data rate
  imu_umarim.adxl.config.rate = UMARIM_ACCEL_RATE;
  imu_umarim.adxl.config.range = UMARIM_ACCEL_RANGE;
}
 
void imu_umarim_periodic(void)
{
  // Start reading the latest gyroscope data
  itg3200_periodic(&imu_umarim.itg);
 
  // Start reading the latest accelerometer data
  adxl345_i2c_periodic(&imu_umarim.adxl);
 
  //RunOnceEvery(10,imu_umarim_downlink_raw());
}
 
void imu_umarim_downlink_raw(void)
{
  DOWNLINK_SEND_IMU_GYRO_RAW(DefaultChannel, DefaultDevice, &imu.gyro_unscaled.p, &imu.gyro_unscaled.q,
                             &imu.gyro_unscaled.r);
  DOWNLINK_SEND_IMU_ACCEL_RAW(DefaultChannel, DefaultDevice, &imu.accel_unscaled.x, &imu.accel_unscaled.y,
                              &imu.accel_unscaled.z);
}
 
 
void imu_umarim_event(void)
{
  uint32_t now_ts = get_sys_time_usec();
 
  // If the itg3200 I2C transaction has succeeded: convert the data
  itg3200_event(&imu_umarim.itg);
  if (imu_umarim.itg.data_available) {
    RATES_COPY(imu.gyro_unscaled, imu_umarim.itg.data.rates);
    imu_umarim.itg.data_available = false;
    imu_scale_gyro(&imu);
    AbiSendMsgIMU_GYRO_INT32(IMU_BOARD_ID, now_ts, &imu.gyro);
  }
 
  // If the adxl345 I2C transaction has succeeded: convert the data
  adxl345_i2c_event(&imu_umarim.adxl);
  if (imu_umarim.adxl.data_available) {
    VECT3_ASSIGN(imu.accel_unscaled, imu_umarim.adxl.data.vect.y, -imu_umarim.adxl.data.vect.x,
                 imu_umarim.adxl.data.vect.z);
    imu_umarim.adxl.data_available = false;
    imu_scale_accel(&imu);
    AbiSendMsgIMU_ACCEL_INT32(IMU_BOARD_ID, now_ts, &imu.accel);
  }
}