• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 81 subscribers
  • Views 419 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Questions about DPlib 2p2z in F28M36 device

Tom_Chen
Intellectual 695 points
Other Parts Discussed in Thread: CONTROLSUITE

#include “DPLib.h”

extern volatile float *CNTL_2P2Z_Ref1;
extern volatile float *CNTL_2P2Z_Out1;
extern volatile float *CNTL_2P2Z_Fdbk1;
extern volatile float *CNTL_2P2Z_Coef1;

float Ref , Fdbk , Out;
#pragma DATA_SECTION(CNTL_2P2Z_CoefStruct1, "CNTL_2P2Z_Coef");
struct CNTL_2P2Z_CoefStruct CNTL_2P2Z_CoefStruct1;

DPL_Init();
CNTL_2P2Z_Fdbk1 = &Fdbk;
CNTL_2P2Z_Out1 = &Out;

CNTL_2P2Z_Ref1 = &Ref;
CNTL_2P2Z_Coef1 = &CNTL_2P2Z_CoefStruct1.b2;
CNTL_2P2Z_CoefStruct1.b2 = 0.05;
CNTL_2P2Z_CoefStruct1.b1 = -0.20;
CNTL_2P2Z_CoefStruct1.b0 = 0.20;
CNTL_2P2Z_CoefStruct1.a2 = 0.0;
CNTL_2P2Z_CoefStruct1.a1 = 1.0;
CNTL_2P2Z_CoefStruct1.max =0.7;
CNTL_2P2Z_CoefStruct1.i_min =-0.9;
CNTL_2P2Z_CoefStruct1.min =0.0;
Ref=0.0;
Fdbk=0.0;
Out=0.0;

.include "CNTL_2P2Z.asm"

CNTL_2P2Z_INIT 1 ; CNTL_2P2Z Initialization

CNTL_2P2Z 1 ; Run the CNTL_2P2Z Macro

---------------------------------------------------------------------

My question is the DPLib for F28M36 device is floating point 

1.  is the CNTL_2P2Z_Coef could be any number from - inf to inf ?

2.  is the Ref, Fdbk, Out should use the other device declaration like IQ24 format or

3.  could there parameter ( Ref, Fdbk, Out ) use float  format ? could this number varying from -inf to inf?

  • 0
    TI__Mastermind 43730 points

    Tom, 

    The documentation of thew library is 

    at controlSUITE\libs\app_libs\digital_power\f28M35x_v1.1\Doc

    1. Yes you are correct the Coef can be any number , it is noted incorrectly in the library document. 

    2,3. Step 3 shows that the Ref, Fbk and Out need to be float

    Yes they can be any number but library was tested with only  0 to 1, this is not a problem typically as you have pu value due to ADC and PWM. 

    However you can use it for wide range of values.