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LibrePilot/flight/Modules/Sensors/sensors.c
James Cotton 2f8049e20a Update the bootloader hw version for the mpu6000 board and make the sensor code 
and initialization respond appropriately.  Enable hte L3GD20 and BMA180.
Let the board type determine which is used.
2012-03-22 00:41:37 -05:00

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/**
******************************************************************************
* @addtogroup OpenPilotModules OpenPilot Modules
* @{
* @addtogroup Sensors
* @brief Acquires sensor data
* Specifically updates the the @ref Gyros, @ref Accels, and @ref Magnetometer objects
* @{
*
* @file sensors.c
* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
* @brief Module to handle all comms to the AHRS on a periodic basis.
*
* @see The GNU Public License (GPL) Version 3
*
******************************************************************************/
/*
* This program 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 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/**
* Input objects: None, takes sensor data via pios
* Output objects: @ref Gyros @ref Accels @ref Magnetometer
*
* The module executes in its own thread.
*
* UAVObjects are automatically generated by the UAVObjectGenerator from
* the object definition XML file.
*
* Modules have no API, all communication to other modules is done through UAVObjects.
* However modules may use the API exposed by shared libraries.
* See the OpenPilot wiki for more details.
* http://www.openpilot.org/OpenPilot_Application_Architecture
*
*/
#include "pios.h"
#include "attitude.h"
#include "magnetometer.h"
#include "accels.h"
#include "gyros.h"
#include "gyrosbias.h"
#include "attitudeactual.h"
#include "attitudesettings.h"
#include "revocalibration.h"
#include "flightstatus.h"
#include "gpsposition.h"
#include "baroaltitude.h"
#include "CoordinateConversions.h"
#include <pios_board_info.h>
// Private constants
#define STACK_SIZE_BYTES 1540
#define TASK_PRIORITY (tskIDLE_PRIORITY+3)
#define SENSOR_PERIOD 2
#define F_PI 3.14159265358979323846f
#define PI_MOD(x) (fmod(x + F_PI, F_PI * 2) - F_PI)
// Private types
// Private variables
static xTaskHandle sensorsTaskHandle;
static bool gps_updated = false;
static bool baro_updated = false;
// Private functions
static void SensorsTask(void *parameters);
static void settingsUpdatedCb(UAVObjEvent * objEv);
static void sensorsUpdatedCb(UAVObjEvent * objEv);
// These values are initialized by settings but can be updated by the attitude algorithm
static bool bias_correct_gyro = true;
static float mag_bias[3] = {0,0,0};
static float mag_scale[3] = {0,0,0};
static float accel_bias[3] = {0,0,0};
static float accel_scale[3] = {0,0,0};
/**
* API for sensor fusion algorithms:
* Configure(xQueueHandle gyro, xQueueHandle accel, xQueueHandle mag, xQueueHandle baro)
* Stores all the queues the algorithm will pull data from
* FinalizeSensors() -- before saving the sensors modifies them based on internal state (gyro bias)
* Update() -- queries queues and updates the attitude estiamte
*/
/**
* Initialise the module. Called before the start function
* \returns 0 on success or -1 if initialisation failed
*/
int32_t SensorsInitialize(void)
{
GyrosInitialize();
GyrosBiasInitialize();
AccelsInitialize();
MagnetometerInitialize();
RevoCalibrationInitialize();
RevoCalibrationConnectCallback(&settingsUpdatedCb);
return 0;
}
/**
* Start the task. Expects all objects to be initialized by this point.
* \returns 0 on success or -1 if initialisation failed
*/
int32_t SensorsStart(void)
{
// Start main task
xTaskCreate(SensorsTask, (signed char *)"Sensors", STACK_SIZE_BYTES/4, NULL, TASK_PRIORITY, &sensorsTaskHandle);
TaskMonitorAdd(TASKINFO_RUNNING_SENSORS, sensorsTaskHandle);
PIOS_WDG_RegisterFlag(PIOS_WDG_SENSORS);
return 0;
}
MODULE_INITCALL(SensorsInitialize, SensorsStart)
int32_t accel_test;
int32_t gyro_test;
int32_t mag_test;
//int32_t pressure_test;
/**
* The sensor task. This polls the gyros at 500 Hz and pumps that data to
* stabilization and to the attitude loop
*
* This function has a lot of if/defs right now to allow these configurations:
* 1. BMA180 accel and MPU6000 gyro
* 2. MPU6000 gyro and accel
* 3. BMA180 accel and L3GD20 gyro
*/
uint32_t sensor_dt_us;
static void SensorsTask(void *parameters)
{
portTickType lastSysTime;
uint32_t accel_samples;
uint32_t gyro_samples;
int32_t accel_accum[3] = {0, 0, 0};
int32_t gyro_accum[3] = {0,0,0};
float gyro_scaling = 0;
float accel_scaling = 0;
static int32_t timeval;
AlarmsClear(SYSTEMALARMS_ALARM_SENSORS);
UAVObjEvent ev;
settingsUpdatedCb(&ev);
const struct pios_board_info * bdinfo = &pios_board_info_blob;
switch(bdinfo->board_rev) {
case 0x01:
#if defined(PIOS_INCLUDE_L3GD20)
gyro_test = PIOS_L3GD20_Test();
#endif
#if defined(PIOS_INCLUDE_BMA180)
accel_test = PIOS_BMA180_Test();
#endif
break;
case 0x02:
#if defined(PIOS_INCLUDE_MPU6000)
gyro_test = PIOS_MPU6000_Test();
accel_test = gyro_test;
#endif
break;
default:
PIOS_DEBUG_Assert(0);
}
#if defined(PIOS_INCLUDE_HMC5883)
mag_test = PIOS_HMC5883_Test();
#endif
if(accel_test < 0 || gyro_test < 0 || mag_test < 0) {
AlarmsSet(SYSTEMALARMS_ALARM_SENSORS, SYSTEMALARMS_ALARM_CRITICAL);
while(1) {
PIOS_WDG_UpdateFlag(PIOS_WDG_SENSORS);
vTaskDelay(10);
}
}
// If debugging connect callback
if(pios_com_aux_id != 0) {
BaroAltitudeConnectCallback(&sensorsUpdatedCb);
GPSPositionConnectCallback(&sensorsUpdatedCb);
}
// Main task loop
lastSysTime = xTaskGetTickCount();
bool error = false;
uint32_t mag_update_time = PIOS_DELAY_GetRaw();
while (1) {
// TODO: add timeouts to the sensor reads and set an error if the fail
sensor_dt_us = PIOS_DELAY_DiffuS(timeval);
timeval = PIOS_DELAY_GetRaw();
if (error) {
PIOS_WDG_UpdateFlag(PIOS_WDG_SENSORS);
lastSysTime = xTaskGetTickCount();
vTaskDelayUntil(&lastSysTime, SENSOR_PERIOD / portTICK_RATE_MS);
AlarmsSet(SYSTEMALARMS_ALARM_SENSORS, SYSTEMALARMS_ALARM_CRITICAL);
error = false;
} else {
AlarmsClear(SYSTEMALARMS_ALARM_SENSORS);
}
int32_t read_good;
int32_t count;
for (int i = 0; i < 3; i++) {
accel_accum[i] = 0;
gyro_accum[i] = 0;
}
accel_samples = 0;
gyro_samples = 0;
AccelsData accelsData;
GyrosData gyrosData;
switch(bdinfo->board_rev) {
case 0x01: // L3GD20 + BMA180 board
#if defined(PIOS_INCLUDE_BMA180)
{
struct pios_bma180_data accel;
count = 0;
while((read_good = PIOS_BMA180_ReadFifo(&accel)) != 0 && !error)
error = ((xTaskGetTickCount() - lastSysTime) > SENSOR_PERIOD) ? true : error;
if (error) {
// Unfortunately if the BMA180 ever misses getting read, then it will not
// trigger more interrupts. In this case we must force a read to kickstarts
// it.
struct pios_bma180_data data;
PIOS_BMA180_ReadAccels(&data);
continue;
}
while(read_good == 0) {
count++;
accel_accum[0] += accel.x;
accel_accum[1] += accel.y;
accel_accum[2] += accel.z;
read_good = PIOS_BMA180_ReadFifo(&accel);
}
accel_samples = count;
accel_scaling = PIOS_BMA180_GetScale();
// Get temp from last reading
accelsData.temperature = 25.0f + ((float) accel.temperature - 2.0f) / 2.0f;
}
#endif
#if defined(PIOS_INCLUDE_L3GD20)
{
struct pios_l3gd20_data gyro;
gyro_samples = 0;
xQueueHandle gyro_queue = PIOS_L3GD20_GetQueue();
if(xQueueReceive(gyro_queue, (void *) &gyro, 4) == errQUEUE_EMPTY) {
error = true;
continue;
}
gyro_samples = 1;
gyro_accum[0] += gyro.gyro_x;
gyro_accum[1] += gyro.gyro_y;
gyro_accum[2] += gyro.gyro_z;
gyro_scaling = PIOS_L3GD20_GetScale();
// Get temp from last reading
gyrosData.temperature = gyro.temperature;
}
#endif
break;
case 0x02: // MPU6000 board
#if defined(PIOS_INCLUDE_MPU6000)
{
struct pios_mpu6000_data gyro;
count = 0;
while((read_good = PIOS_MPU6000_ReadFifo(&gyro)) != 0 && !error)
error = ((xTaskGetTickCount() - lastSysTime) > SENSOR_PERIOD) ? true : error;
if (error)
continue;
while(read_good == 0) {
count++;
gyro_accum[0] += gyro.gyro_x;
gyro_accum[1] += gyro.gyro_y;
gyro_accum[2] += gyro.gyro_z;
accel_accum[0] += gyro.accel_x;
accel_accum[1] += gyro.accel_y;
accel_accum[2] += gyro.accel_z;
read_good = PIOS_MPU6000_ReadFifo(&gyro);
}
gyro_samples = count;
gyro_scaling = PIOS_MPU6000_GetScale();
accel_samples = count;
accel_scaling = PIOS_MPU6000_GetAccelScale();
// Get temp from last reading
gyrosData.temperature = 35.0f + ((float) gyro.temperature + 512.0f) / 340.0f;
accelsData.temperature = 35.0f + ((float) gyro.temperature + 512.0f) / 340.0f;
}
#endif /* PIOS_INCLUDE_MPU6000 */
break;
default:
PIOS_DEBUG_Assert(0);
}
// Scale the accels
float accels[3] = {(float) accel_accum[1] / accel_samples,
(float) accel_accum[0] / accel_samples,
-(float) accel_accum[2] / accel_samples};
accelsData.x = accels[0] * accel_scaling * accel_scale[0] - accel_bias[0];
accelsData.y = accels[1] * accel_scaling * accel_scale[1] - accel_bias[1];
accelsData.z = accels[2] * accel_scaling * accel_scale[2] - accel_bias[2];
AccelsSet(&accelsData);
// Scale the gyros
float gyros[3] = {(float) gyro_accum[1] / gyro_samples,
(float) gyro_accum[0] / gyro_samples,
-(float) gyro_accum[2] / gyro_samples};
gyrosData.x = gyros[0] * gyro_scaling;
gyrosData.y = gyros[1] * gyro_scaling;
gyrosData.z = gyros[2] * gyro_scaling;
if (bias_correct_gyro) {
// Apply bias correction to the gyros
GyrosBiasData gyrosBias;
GyrosBiasGet(&gyrosBias);
gyrosData.x += gyrosBias.x;
gyrosData.y += gyrosBias.y;
gyrosData.z += gyrosBias.z;
}
GyrosSet(&gyrosData);
// Because most crafts wont get enough information from gravity to zero yaw gyro, we try
// and make it average zero (weakly)
#if defined(PIOS_INCLUDE_HMC5883)
MagnetometerData mag;
if (PIOS_HMC5883_NewDataAvailable() || PIOS_DELAY_DiffuS(mag_update_time) > 150000) {
int16_t values[3];
PIOS_HMC5883_ReadMag(values);
mag.x = values[1] * mag_scale[0] - mag_bias[0];
mag.y = values[0] * mag_scale[1] - mag_bias[1];
mag.z = -values[2] * mag_scale[2] - mag_bias[2];
MagnetometerSet(&mag);
mag_update_time = PIOS_DELAY_GetRaw();
}
#endif
PIOS_WDG_UpdateFlag(PIOS_WDG_SENSORS);
switch(bdinfo->board_rev) {
case 0x01: // L3GD20 + BMA180 board
lastSysTime = xTaskGetTickCount();
break;
case 0x02:
vTaskDelayUntil(&lastSysTime, SENSOR_PERIOD / portTICK_RATE_MS);
break;
default:
PIOS_DEBUG_Assert(0);
}
}
}
/**
* Indicate that these sensors have been updated
*/
static void sensorsUpdatedCb(UAVObjEvent * objEv)
{
if(objEv->obj == GPSPositionHandle())
gps_updated = true;
if(objEv->obj == BaroAltitudeHandle())
baro_updated = true;
}
/**
* Locally cache some variables from the AtttitudeSettings object
*/
static void settingsUpdatedCb(UAVObjEvent * objEv) {
RevoCalibrationData cal;
RevoCalibrationGet(&cal);
mag_bias[0] = cal.mag_bias[REVOCALIBRATION_MAG_BIAS_X];
mag_bias[1] = cal.mag_bias[REVOCALIBRATION_MAG_BIAS_Y];
mag_bias[2] = cal.mag_bias[REVOCALIBRATION_MAG_BIAS_Z];
mag_scale[0] = cal.mag_scale[REVOCALIBRATION_MAG_SCALE_X];
mag_scale[1] = cal.mag_scale[REVOCALIBRATION_MAG_SCALE_Y];
mag_scale[2] = cal.mag_scale[REVOCALIBRATION_MAG_SCALE_Z];
accel_bias[0] = cal.accel_bias[REVOCALIBRATION_ACCEL_BIAS_X];
accel_bias[1] = cal.accel_bias[REVOCALIBRATION_ACCEL_BIAS_Y];
accel_bias[2] = cal.accel_bias[REVOCALIBRATION_ACCEL_BIAS_Z];
accel_scale[0] = cal.accel_scale[REVOCALIBRATION_ACCEL_SCALE_X];
accel_scale[1] = cal.accel_scale[REVOCALIBRATION_ACCEL_SCALE_Y];
accel_scale[2] = cal.accel_scale[REVOCALIBRATION_ACCEL_SCALE_Z];
}
/**
* @}
* @}
*/
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