File content as of revision 23:54503e363f67:

/**
 ******************************************************************************
 * @file    main.cpp
 * @author  Davide Aliprandi, STMicroelectronics
 * @version V1.0.0
 * @date    October 14th, 2015
 * @brief   mbed test application for the STMicroelectronics X-NUCLEO-IHM01A1
 *          Motor Control Expansion Board: control of 1 motor.
 ******************************************************************************
 * @attention
 *
 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *   1. Redistributions of source code must retain the above copyright notice,
 *      this list of conditions and the following disclaimer.
 *   2. Redistributions in binary form must reproduce the above copyright notice,
 *      this list of conditions and the following disclaimer in the documentation
 *      and/or other materials provided with the distribution.
 *   3. Neither the name of STMicroelectronics nor the names of its contributors
 *      may be used to endorse or promote products derived from this software
 *      without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 ******************************************************************************
 */


/* Includes ------------------------------------------------------------------*/

/* mbed specific header files. */
#include "mbed.h"

/* Helper header files. */
#include "DevSPI.h"

/* Component specific header files. */
#include "l6474_class.h"


/* Definitions ---------------------------------------------------------------*/

/* Number of steps to move. */
#define STEPS 3200


/* Variables -----------------------------------------------------------------*/

/* Initialization parameters. */
L6474_Init_t init =
{
    160,                              /* Acceleration rate in step/s2. Range: (0..+inf). */
    160,                              /* Deceleration rate in step/s2. Range: (0..+inf). */
    1600,                             /* Maximum speed in step/s. Range: (30..10000]. */
    800,                              /* Minimum speed in step/s. Range: [30..10000). */
    250,                              /* Torque regulation current in mA. Range: 31.25mA to 4000mA. */
    L6474_OCD_TH_750mA,               /* Overcurrent threshold (OCD_TH register). */
    L6474_CONFIG_OC_SD_ENABLE,        /* Overcurrent shutwdown (OC_SD field of CONFIG register). */
    L6474_CONFIG_EN_TQREG_TVAL_USED,  /* Torque regulation method (EN_TQREG field of CONFIG register). */
    L6474_STEP_SEL_1_4,               /* Step selection (STEP_SEL field of STEP_MODE register). */
    L6474_SYNC_SEL_1_2,               /* Sync selection (SYNC_SEL field of STEP_MODE register). */
    L6474_FAST_STEP_12us,             /* Fall time value (T_FAST field of T_FAST register). Range: 2us to 32us. */
    L6474_TOFF_FAST_8us,              /* Maximum fast decay time (T_OFF field of T_FAST register). Range: 2us to 32us. */
    3,                                /* Minimum ON time in us (TON_MIN register). Range: 0.5us to 64us. */
    21,                               /* Minimum OFF time in us (TOFF_MIN register). Range: 0.5us to 64us. */
    L6474_CONFIG_TOFF_044us,          /* Target Swicthing Period (field TOFF of CONFIG register). */
    L6474_CONFIG_SR_320V_us,          /* Slew rate (POW_SR field of CONFIG register). */
    L6474_CONFIG_INT_16MHZ,           /* Clock setting (OSC_CLK_SEL field of CONFIG register). */
    L6474_ALARM_EN_OVERCURRENT |
    L6474_ALARM_EN_THERMAL_SHUTDOWN |
    L6474_ALARM_EN_THERMAL_WARNING |
    L6474_ALARM_EN_UNDERVOLTAGE |
    L6474_ALARM_EN_SW_TURN_ON |
    L6474_ALARM_EN_WRONG_NPERF_CMD    /* Alarm (ALARM_EN register). */
};

/* Motor Control Component. */
L6474 *motor;


/* Functions -----------------------------------------------------------------*/

/**
  * @brief  This is an example of user handler for the flag interrupt.
  * @param  None
  * @retval None
  * @note   If needed, implement it, and then attach and enable it:
  *           + motor->AttachFlagIRQ(&FlagIRQHandler);
  *           + motor->EnableFlagIRQ();
  *         To disable it:
  *           + motor->DisbleFlagIRQ();
  */
void FlagIRQHandler(void)
{
    /* Set ISR flag. */
    motor->isr_flag = TRUE;

    /* Get the value of the status register. */
    unsigned int status = motor->GetStatus();
    
    /* Check NOTPERF_CMD flag: if set, the command received by SPI can't be performed. */
    /* This often occures when a command is sent to the L6474 while it is not in HiZ state. */
    if ((status & L6474_STATUS_NOTPERF_CMD) == L6474_STATUS_NOTPERF_CMD)
        printf("    WARNING: \"FLAG\" interrupt triggered. Non-performable command detected when updating L6474's registers while not in HiZ state.\r\n");
    
    /* Reset ISR flag. */
    motor->isr_flag = FALSE;
}


/* Main ----------------------------------------------------------------------*/

int main()
{
    /*----- Initialization. -----*/

    /* Initializing SPI bus. */
    DevSPI dev_spi(D11, D12, D13);

    /* Initializing Motor Control Component. */
    motor = new L6474(D2, D8, D7, D9, D10, dev_spi);
    if (motor->Init(&init) != COMPONENT_OK)
        exit(EXIT_FAILURE);

    /* Attaching and enabling interrupt handlers. */
    motor->AttachFlagIRQ(&FlagIRQHandler);
    motor->EnableFlagIRQ();

    /* Printing to the console. */
    printf("Motor Control Application Example for 1 Motor\r\n\n");


    /*----- Moving. -----*/

    /* Printing to the console. */
    printf("--> Moving forward %d steps.\r\n", STEPS);

    /* Moving N steps in the forward direction. */
    motor->Move(StepperMotor::FWD, STEPS);

    /* Waiting while the motor is active. */
    motor->WaitWhileActive();

    /* Getting current position. */
    int position = motor->GetPosition();
    
    /* Printing to the console. */
    printf("    Position: %d.\r\n", position);

    /* Waiting 2 seconds. */
    wait_ms(2000);


    /*----- Changing motor setting. -----*/

    /* Printing to the console. */
    printf("--> Changing Step Mode and Torque.\r\n");

    /* Setting High Impedance State to update L6474's registers. */
    motor->SoftHiZ();

    /* Changing step mode. */
    motor->SetParameter(L6474_STEP_MODE, (unsigned int) L6474_STEP_SEL_1_16 | (unsigned int) L6474_SYNC_SEL_1_2);

    /* Increasing the torque regulation current to 500mA. */
    motor->SetParameter(L6474_TVAL, 500);

    /* Waiting 1 second. */
    wait_ms(1000);


    /*----- Moving. -----*/
    
    /* Printing to the console. */
    printf("--> Moving backward %d steps.\r\n", STEPS);

    /* Moving N steps in the backward direction. */
    motor->Move(StepperMotor::BWD, STEPS);
    
    /* Waiting while the motor is active. */
    motor->WaitWhileActive();

    /* Getting current position. */
    position = motor->GetPosition();
    
    /* Printing to the console. */
    printf("    Position: %d.\r\n", position);
    printf("--> Setting Home.\r\n");

    /* Setting the current position to be the home position. */
    motor->SetHome();

    /* Waiting 2 seconds. */
    wait_ms(2000);


    /*----- Going to a specified position. -----*/

    /* Printing to the console. */
    printf("--> Going to position %d.\r\n", STEPS);
    
    /* Requesting to go to a specified position. */
    motor->GoTo(STEPS);
    
    /* Waiting while the motor is active. */
    motor->WaitWhileActive();

    /* Getting current position. */
    position = motor->GetPosition();
    
    /* Printing to the console. */
    printf("    Position: %d.\r\n", position);
    
    /* Waiting 2 seconds. */
    wait_ms(2000);

    
    /*----- Going Home. -----*/

    /* Printing to the console. */
    printf("--> Going Home.\r\n");
    
    /* Requesting to go to home. */
    motor->GoHome();
    
    /* Waiting while the motor is active. */
    motor->WaitWhileActive();

    /* Getting current position. */
    position = motor->GetPosition();

    /* Printing to the console. */
    printf("    Position: %d.\r\n", position);

    /* Waiting 2 seconds. */
    wait_ms(2000);


    /*----- Running. -----*/

    /* Printing to the console. */
    printf("--> Running backward.\r\n");

    /* Requesting to run backward. */
    motor->Run(StepperMotor::BWD);

    /* Waiting until delay has expired. */
    wait_ms(6000);

    /* Getting current speed. */
    int speed = motor->GetSpeed();

    /* Printing to the console. */
    printf("    Speed: %d.\r\n", speed);

    /*----- Increasing the speed while running. -----*/

    /* Printing to the console. */
    printf("--> Increasing the speed while running.\r\n");

    /* Increasing speed to 2400 step/s. */
    motor->SetMaxSpeed(2400);

    /* Waiting until delay has expired. */
    wait_ms(6000);

    /* Getting current speed. */
    speed = motor->GetSpeed();

    /* Printing to the console. */
    printf("    Speed: %d.\r\n", speed);


    /*----- Decreasing the speed while running. -----*/

    /* Printing to the console. */
    printf("--> Decreasing the speed while running.\r\n");

    /* Decreasing speed to 1200 step/s. */
    motor->SetMaxSpeed(1200);

    /* Waiting until delay has expired. */
    wait_ms(8000);

    /* Getting current speed. */
    speed = motor->GetSpeed();

    /* Printing to the console. */
    printf("    Speed: %d.\r\n", speed);


    /*----- Requiring hard-stop while running. -----*/

    /* Printing to the console. */
    printf("--> Requiring hard-stop while running.\r\n");

    /* Requesting to immediatly stop. */
    motor->HardStop();

    /* Waiting while the motor is active. */
    motor->WaitWhileActive();

    /* Waiting 2 seconds. */
    wait_ms(2000);


    /*----- Infinite Loop. -----*/

    /* Printing to the console. */
    printf("--> Infinite Loop...\r\n");

    /* Setting the current position to be the home position. */
    motor->SetHome();

    /* Infinite Loop. */
    while (1)
    {
        /* Requesting to go to a specified position. */
        motor->GoTo(STEPS >> 1);

        /* Waiting while the motor is active. */
        motor->WaitWhileActive();

        /* Requesting to go to a specified position. */
        motor->GoTo(- (STEPS >> 1));

        /* Waiting while the motor is active. */
        motor->WaitWhileActive();
    }
}