AMiRo-OS

/*

AMiRo-OS is an operating system designed for the Autonomous Mini Robot (AMiRo) platform.

Copyright (C) 2016..2018  Thomas Schöpping et al.

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, see <http://www.gnu.org/licenses/>.

*/

#include <ut_alld_a3906.h>

#if ((AMIROOS_CFG_TESTS_ENABLE == true) && defined(AMIROLLD_CFG_USE_A3906)) || defined(__DOXYGEN__)

#include <aos_debug.h>

#include <chprintf.h>

#include <alld_a3906.h>

#include <aos_thread.h>

#include <stdlib.h>

#include <math.h>

/**

 * @brief   Interval to poll QEI in certain tests.

 */

#define QEI_POLL_INTERVAL_MS          100

/**

 * @brief   Threshold for QEI differences.

 * @details Differences smaller than or equal to this value are neglected (interpreted as zero).

 *          The value can be interpreted as encoder ticks per second (tps).

 * @note    The expected value is about 7000 tps and a jitter of up to ±2% is ok.

 */

#define QEI_DIFF_THRESHOLD            (apalQEICount_t)(7000 * 0.02f)

/**

 * @brief   Enumerator to distinguish between left and right wheel.

 */

typedef enum {

  WHEEL_LEFT    = 0,  /**< left wheel identifier */

  WHEEL_RIGHT   = 1,  /**< right wheel identifier */

} wheel_t;

/**

 * @brief   Enumerator to distinguish directions.

 */

typedef enum {

  DIRECTION_FORWARD   = 0,  /**< forward direction identifier */

  DIRECTION_BACKWARD  = 1,  /**< backward direction identifier */

} direction_t;

/**

 * @brief   helper function to test each wheel and direction separately.

 *

 * @param[in] stream      Stream for input/output.

 * @param[in] data        Unit test meta data.

 * @param[in] wheel       Wheel to test.

 * @param[in] direction   Direction to test.

 * @param[in,out] result  Result variable to modify.

 */

void _wheelDirectionTest(BaseSequentialStream* stream, ut_a3906data_t* data, wheel_t wheel, direction_t direction, aos_utresult_t* result)

{

  // local variables

  uint32_t status;

  bool qei_valid;

  apalQEICount_t qei_count[2];

  apalQEIDirection_t qei_direction;

  uint32_t timeout_counter;

  chprintf(stream, "%s wheel %s...\n", (wheel == WHEEL_LEFT) ? "left" : "right", (direction == DIRECTION_FORWARD) ? "forward" : "backward");

  qei_valid = false;

  status = apalQEIGetPosition((wheel == WHEEL_LEFT) ? data->qei.left : data->qei.right, &qei_count[0]);

  // increase PWM incrementally and read QEI data

  for (apalPWMwidth_t pwm_width = APAL_PWM_WIDTH_MIN; pwm_width < APAL_PWM_WIDTH_MAX; ++pwm_width) {

    status |= a3906_lld_set_pwm(data->pwm.driver, (wheel == WHEEL_LEFT) ?

                                  ((direction == DIRECTION_FORWARD) ? data->pwm.channel.left_forward : data->pwm.channel.left_backward) :

                                  ((direction == DIRECTION_FORWARD) ? data->pwm.channel.right_forward : data->pwm.channel.right_backward),

                                pwm_width);

    status |= apalQEIGetPosition((wheel == WHEEL_LEFT) ? data->qei.left : data->qei.right, &qei_count[1]);

    qei_valid = qei_valid || (qei_count[0] != qei_count[1]);

    aosThdUSleep(5 * MICROSECONDS_PER_SECOND / (APAL_PWM_WIDTH_MAX - APAL_PWM_WIDTH_MIN));

    qei_count[0] = qei_count[1];

  }

  status |= qei_valid ? 0x00 : 0x10;

  status |= apalQEIGetDirection((wheel == WHEEL_LEFT) ? data->qei.left : data->qei.right, &qei_direction);

  status |= (qei_direction == ((direction == DIRECTION_FORWARD) ? APAL_QEI_DIRECTION_UP : APAL_QEI_DIRECTION_DOWN)) ? 0x00 : 0x20;

  // let the wheel spin free until it stops

  status |= a3906_lld_set_pwm(data->pwm.driver, (wheel == WHEEL_LEFT) ?

                                ((direction == DIRECTION_FORWARD) ? data->pwm.channel.left_forward : data->pwm.channel.left_backward) :

                                ((direction == DIRECTION_FORWARD) ? data->pwm.channel.right_forward : data->pwm.channel.right_backward),

                              0);

  qei_count[0] = 0;

  qei_count[1] = 0;

  timeout_counter = 0;

  do {

    status |= apalQEIGetPosition((wheel == WHEEL_LEFT) ? data->qei.left : data->qei.right, &qei_count[0]);

    aosThdMSleep(1);

    status |= apalQEIGetPosition((wheel == WHEEL_LEFT) ? data->qei.left : data->qei.right, &qei_count[1]);

    ++timeout_counter;

  } while ((qei_count[0] != qei_count[1]) && (timeout_counter * MICROSECONDS_PER_MILLISECOND <= data->timeout));

  status |= (timeout_counter * MICROSECONDS_PER_MILLISECOND > data->timeout) ? APAL_STATUS_TIMEOUT : 0x00;

  // report result

  if (status == APAL_STATUS_SUCCESS) {

    aosUtPassed(stream, result);

  } else {

    aosUtFailedMsg(stream, result, "0x%08X\n", status);

  }

  return;

}

void _wheelSpeedTest(BaseSequentialStream* stream, ut_a3906data_t* data, wheel_t wheel, direction_t direction, aos_utresult_t* result)

{

  // local variables

  uint32_t status;

  apalQEICount_t qei_range;

  apalQEICount_t qei_count[2] = {0};

  apalQEICount_t qei_increments[2] = {0};

  apalQEICount_t qei_increments_diff = 0;

  uint32_t timeout_counter = 0;

  uint32_t stable_counter = 0;

  chprintf(stream, "%s wheel full speed %s...\n", (wheel == WHEEL_LEFT) ? "left" : "right", (direction == DIRECTION_FORWARD) ? "forward" : "backward");

  // spin up the wheel with full speed

  status = apalQEIGetRange((wheel == WHEEL_LEFT) ? data->qei.left : data->qei.right, &qei_range);

  status |= a3906_lld_set_pwm(data->pwm.driver, (wheel == WHEEL_LEFT) ?

                               ((direction == DIRECTION_FORWARD) ? data->pwm.channel.left_forward : data->pwm.channel.left_backward) :

                               ((direction == DIRECTION_FORWARD) ? data->pwm.channel.right_forward : data->pwm.channel.right_backward),

                             APAL_PWM_WIDTH_MAX);

  aosThdMSleep(100);

  do {

    // read QEI data to determine speed

    status |= apalQEIGetPosition((wheel == WHEEL_LEFT) ? data->qei.left : data->qei.right, &qei_count[0]);

    aosThdMSleep(QEI_POLL_INTERVAL_MS);

    status |= apalQEIGetPosition((wheel == WHEEL_LEFT) ? data->qei.left : data->qei.right, &qei_count[1]);

    timeout_counter += QEI_POLL_INTERVAL_MS;

    qei_increments[0] = qei_increments[1];

    qei_increments[1] = (direction == DIRECTION_FORWARD) ?

                          ((qei_count[1] > qei_count[0]) ? (qei_count[1] - qei_count[0]) : (qei_count[1] + (qei_range - qei_count[0]))) :

                          ((qei_count[0] > qei_count[1]) ? (qei_count[0] - qei_count[1]) : (qei_count[0] + (qei_range - qei_count[1])));

    qei_increments_diff = abs((int32_t)qei_increments[0] - (int32_t)qei_increments[1]) * ((float)MILLISECONDS_PER_SECOND / (float)QEI_POLL_INTERVAL_MS);

    stable_counter = ((qei_increments[0] != 0 || qei_increments[1] != 0) && qei_increments_diff <= QEI_DIFF_THRESHOLD) ? stable_counter+1 : 0;

    if (qei_increments[0] != 0 && stable_counter == 0) {

      chprintf(stream, "\tunstable speed? jitter of %u tps is above threshold (%u tps).\n", qei_increments_diff, QEI_DIFF_THRESHOLD);

    }

  } while ((stable_counter* QEI_POLL_INTERVAL_MS < MILLISECONDS_PER_SECOND) && (timeout_counter * MICROSECONDS_PER_MILLISECOND <= data->timeout));

  status |= a3906_lld_set_pwm(data->pwm.driver, (wheel == WHEEL_LEFT) ?

                               ((direction == DIRECTION_FORWARD) ? data->pwm.channel.left_forward : data->pwm.channel.left_backward) :

                               ((direction == DIRECTION_FORWARD) ? data->pwm.channel.right_forward : data->pwm.channel.right_backward),

                             APAL_PWM_WIDTH_OFF);

  status |= (timeout_counter * MICROSECONDS_PER_MILLISECOND > data->timeout) ? APAL_STATUS_TIMEOUT : 0x00;

  // report results

  if (status == APAL_STATUS_SUCCESS) {

    aosUtPassed(stream, result);

    const float tps = qei_increments[1] * ((float)MILLISECONDS_PER_SECOND / (float)QEI_POLL_INTERVAL_MS);

    const float rpm = tps * SECONDS_PER_MINUTE / (float)data->qei.increments_per_revolution;

    const float velocity = tps / (float)data->qei.increments_per_revolution * ((wheel == WHEEL_LEFT) ? data->wheel_diameter.left : data->wheel_diameter.right) * acos(-1);

    chprintf(stream, "\t%f tps\n", tps);

    chprintf(stream, "\t%f RPM\n", rpm);

    chprintf(stream, "\t%f m/s\n", velocity);

    chprintf(stream, "\n");

  }

  else {

    aosUtFailedMsg(stream, result, "0x%08X\n", status);

  }

}

/**

 * @brief   A3905 unit test function.

 *

 * @param[in] stream  Stream for input/output.

 * @param[in] ut      Unit test object.

 *

 * @return            Unit test result value.

 */

aos_utresult_t utAlldA3906Func(BaseSequentialStream* stream, aos_unittest_t* ut)

{

  aosDbgCheck((ut->data != NULL) &&

              (((ut_a3906data_t*)ut->data)->driver != NULL) &&

              (((ut_a3906data_t*)ut->data)->pwm.driver != NULL) &&

              (((ut_a3906data_t*)ut->data)->qei.left != NULL) &&

              (((ut_a3906data_t*)ut->data)->qei.right != NULL));

  // local variables

  aos_utresult_t result = {0, 0};

  uint32_t status = 0;

  a3906_lld_power_t power_state;

  apalQEICount_t qei_count[2][2];

  uint32_t timeout_counter;

  uint32_t stable_counter;

  chprintf(stream, "enable power...\n");

  power_state = A3906_LLD_POWER_ON;

  status = a3906_lld_set_power(((ut_a3906data_t*)ut->data)->driver, power_state);

  status |= a3906_lld_get_power(((ut_a3906data_t*)ut->data)->driver, &power_state);

  status |= (power_state != A3906_LLD_POWER_ON) ? 0x10 : 0x00;

  if (status == APAL_STATUS_SUCCESS) {

    aosUtPassed(stream, &result);

  } else {

    aosUtFailedMsg(stream, &result, "0x%08X\n", status);

  }

  _wheelDirectionTest(stream, (ut_a3906data_t*)ut->data, WHEEL_LEFT, DIRECTION_FORWARD, &result);

  _wheelDirectionTest(stream, (ut_a3906data_t*)ut->data, WHEEL_RIGHT, DIRECTION_FORWARD, &result);

  _wheelDirectionTest(stream, (ut_a3906data_t*)ut->data, WHEEL_LEFT, DIRECTION_BACKWARD, &result);

  _wheelDirectionTest(stream, (ut_a3906data_t*)ut->data, WHEEL_RIGHT, DIRECTION_BACKWARD, &result);

  _wheelSpeedTest(stream, (ut_a3906data_t*)ut->data, WHEEL_LEFT, DIRECTION_FORWARD, &result);

  _wheelSpeedTest(stream, (ut_a3906data_t*)ut->data, WHEEL_RIGHT, DIRECTION_FORWARD, &result);

  _wheelSpeedTest(stream, (ut_a3906data_t*)ut->data, WHEEL_LEFT, DIRECTION_BACKWARD, &result);

  _wheelSpeedTest(stream, (ut_a3906data_t*)ut->data, WHEEL_RIGHT, DIRECTION_BACKWARD, &result);

  chprintf(stream, "disable power... \n");

  power_state = A3906_LLD_POWER_OFF;

  status = a3906_lld_set_power(((ut_a3906data_t*)ut->data)->driver, power_state);

  status |= a3906_lld_get_power(((ut_a3906data_t*)ut->data)->driver, &power_state);

  status |= (power_state != A3906_LLD_POWER_OFF) ? 0x10 : 0x00;

  qei_count[WHEEL_LEFT][0] = 0;

  qei_count[WHEEL_LEFT][1] = 0;

  qei_count[WHEEL_RIGHT][0] = 0;

  qei_count[WHEEL_RIGHT][1] = 0;

  timeout_counter = 0;

  stable_counter = 0;

  do {

    status |= apalQEIGetPosition(((ut_a3906data_t*)ut->data)->qei.left, &qei_count[WHEEL_LEFT][0]);

    status |= apalQEIGetPosition(((ut_a3906data_t*)ut->data)->qei.right, &qei_count[WHEEL_RIGHT][0]);

    aosThdMSleep(1);

    status |= apalQEIGetPosition(((ut_a3906data_t*)ut->data)->qei.left, &qei_count[WHEEL_LEFT][1]);

    status |= apalQEIGetPosition(((ut_a3906data_t*)ut->data)->qei.right, &qei_count[WHEEL_RIGHT][1]);

    ++timeout_counter;

    stable_counter = (qei_count[WHEEL_LEFT][0] == qei_count[WHEEL_LEFT][1] && qei_count[WHEEL_RIGHT][0] == qei_count[WHEEL_RIGHT][1]) ? stable_counter+1 : 0;

  } while((stable_counter < 100) && (timeout_counter * MICROSECONDS_PER_MILLISECOND <= ((ut_a3906data_t*)ut->data)->timeout));

  status |= (timeout_counter * MICROSECONDS_PER_MILLISECOND > ((ut_a3906data_t*)ut->data)->timeout) ? APAL_STATUS_TIMEOUT : 0x00;

  if (status == APAL_STATUS_SUCCESS) {

    aosUtPassed(stream, &result);

  } else {

    aosUtFailedMsg(stream, &result, "0x%08X\n", status);

  }

  // stop the PWM

  a3906_lld_set_pwm(((ut_a3906data_t*)ut->data)->pwm.driver, ((ut_a3906data_t*)ut->data)->pwm.channel.left_forward, APAL_PWM_WIDTH_OFF);

  a3906_lld_set_pwm(((ut_a3906data_t*)ut->data)->pwm.driver, ((ut_a3906data_t*)ut->data)->pwm.channel.left_backward, APAL_PWM_WIDTH_OFF);

  a3906_lld_set_pwm(((ut_a3906data_t*)ut->data)->pwm.driver, ((ut_a3906data_t*)ut->data)->pwm.channel.right_forward, APAL_PWM_WIDTH_OFF);

  a3906_lld_set_pwm(((ut_a3906data_t*)ut->data)->pwm.driver, ((ut_a3906data_t*)ut->data)->pwm.channel.right_backward, APAL_PWM_WIDTH_OFF);

  aosUtInfoMsg(stream,"driver object memory footprint: %u bytes\n", sizeof(A3906Driver));

  return result;

}

#endif /* (AMIROOS_CFG_TESTS_ENABLE == true) && defined(AMIROLLD_CFG_USE_A3906) */