lab5 with potentiometer

Rahul Sharma

Expert 2725 points

Other Parts Discussed in Thread: DRV8301

Dear team,

I am interfacing potentiometer with my DRV8301 board and INSTASPIN launchpad.

I am able to read the data and controlled the speed of motor with potentiometer. That is by following commands-

gPotentiometer = HAL_readPotentiometerData(halHandle);

gMotorVars.IqRef_A = gPotentiometer;

and in updateIqRef( ) function-

//_iq iq_ref = _IQmpy(gMotorVars.IqRef_A,_IQ(1.0/USER_IQ_FULL_SCALE_CURRENT_A));
_iq iq_ref = gMotorVars.IqRef_A;

I want to ask that right now i am directly providing the potentiometer data to IqRef_A. Is there any mapping function can be used here instead of directly providing the values? such as _iq iq_ref = mapping_function(min_pot_read,max_pot_read to min_IqRef_A, max_IqRef_A).

also is there any, function that is to be called for current ramping in lab5a?

Thanks.

over 9 years ago

0 Yanming Luo over 9 years ago

TI__Guru** 116920 points

You can use _IQsat(A, Max, Min) to do this function. You should have the same post for ramp control as below, use trajectory (TRAJ) functions for currrent ramping.

https://e2e.ti.com/support/microcontrollers/c2000/f/902/p/550061/2019951#2019951

0 Rahul Sharma over 9 years ago in reply to Yanming Luo

Expert 2725 points

But i guess it is a saturation function which only limits the maximum and minimum values of a particular variable.

I want to map the values of IqRef_A from minimum to maximum values of potentiometer. So that i can proportionate the potentiometer read data with IqRef_A.

Thanks.

0 Yanming Luo over 9 years ago in reply to Rahul Sharma

TI__Guru** 116920 points

You have to write this fucntion by yourself to implement it.

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lab5 with potentiometer