MPI 04.00 Reference >> mpiMotor

mpiMotorMemoryGet

Declaration

int32_t mpiMotorMemoryGet(MPIMotor      motor,
                       void          *dst,
                       const void    *src,
                       int32_t          count)

Required Header: stdmpi.h
Change History: Modified in the 03.03.00

Description

mpiMotorMemoryGet copies count bytes of a Motor's (motor) memory (starting at address src) to application memory (starting at address dst).

Return Values
MPIMessageOK

Sample Code 

/* motorDemandGet(...) demonstrates how to read the primary and 
auxiliary motor demand signals. mpiMotorMemory(...) obtains the 
motor control memory pointer. The pointer's address is then 
passed into mpiMotorMemoryGet(...) to obtain the demand values. 
Note: MPIXmpMotor *memory must be casted as (void *) in 
mpiMotorMemory.
*/

int32_t motorDemandGet(MPIMotor  motor, 
                    float     *primary, 
                    float     *aux)
{

    MPIXmpMotor    *memory;
    int32_t           returnValue;

    /* Get motor control memory pointer */
    returnValue = 
    mpiMotorMemory(motor, 
                  (void *)&memory);

    /* Get primary motor demand value */
    if(returnValue == MPIMessageOK)
    {
        returnValue = 
            mpiMotorMemoryGet(motor,
                              primary,
                              &memory->IO.Demand.Channel[0].Level,
                              sizeof(memory->IO.Demand.Channel[0].Level));
    }

    /* Get auxiliary motor demand value */
    if(returnValue == MPIMessageOK)
    {
        returnValue = 
            mpiMotorMemoryGet(motor,
                              aux,
                              &memory->IO.Demand.Channel[1].Level,
                              sizeof(memory->IO.Demand.Channel[1].Level)); 
    }
    return returnValue;
}

See Also

mpiMotorMemorySet | mpiMotorMemory