API SetEMotor not work


#1

Hello,

I use C# sample in DobotClientDemo2.0 as practice. I want to control conveyor belt and I notice there is no SetEMoter function, so I add one.

Function SetEmotor added in DobotDll.cs
[DllImport(“DobotDll.dll”, EntryPoint = “SetEMotor”, CallingConvention = CallingConvention.Cdecl)]
public static extern int SetEMotor(ref EMotor emotor, bool isQueued, ref UInt64 queuedCmdIndex);

Struct EMotor added in DobotDllType.cs
public struct EMotor {
public byte index;
public byte isEnabled;
public UInt32 speed;
}

Execute SetMotor
private int setmotor(bool isEnabled, UInt32 speed, bool isQueued)
{
EMotor emotor;
emotor.index = 0;
emotor.isEnabled = 1;
emotor.speed = speed;
UInt64 cmdIndex = 0;
int ret = DobotDll.SetEMotor(ref emotor, isQueued, ref cmdIndex);
return ret;
}

Return 0 but nothing happened.

I tried SetEMotor in DobotStudio script and it works fine.


#2

I am experiencing the same or very similar issue with Python. Would greatly appreciate if anybody could shed any light, why it works in DobotStudio and not from outside.


#3

Dear DOBOT team, please take a look into these messages in case you could please shed some light. Sincerely.


#4

Using ROS and C++ encounter the same problem. The convey belt is powered up, but does not move.


#6

Did you manage to solve the problem already?


#7

Hi guys :slight_smile:
I made the belt working in c#. This worked for me.

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)]
public struct EMotor
{
    public byte index;
    public byte isEnabled;
    public Int32 speed;
};