TMS570LS3137: Issue of using MibSpi3's pins as GIO

Hi,

I'm verifying my design with TMS570LS12x LaunchPad. I try to use CLK and NCS3 of MibSpi3 as input pins of GIO to control USER LED B in the launchpad. The location of pins is shown below. CLK is pin 7 in J2. NCS3 is pin 9 in J5. Pin 2 in J3 and pin 1 in J5 used as GND for input.

The surprising thing is NCS3 can control flashing and freezing of USER LED B ( flashing of USER LED A is just a reference without control ) by connecting and disconnecting with GND, no matter CLK connecting to GND or not. And CLK can not control at all, no matter CS3 connecting to GND or not.

What I expect is like the table below.

I use HalCoGen to config the modes of NCS3 and CLK as below.

My test code likes that.

#include "sys_common.h"

/* USER CODE BEGIN (1) */
#include "gio.h"
#include "mibspi.h"
/* USER CODE END */

/** @fn void main(void)
*   @brief Application main function
*   @note This function is empty by default.
*
*   This function is called after startup.
*   The user can use this function to implement the application.
*/

/* USER CODE BEGIN (2) */
#define DELAY_VALUE 1000000
/* USER CODE END */

int main(void)
{
/* USER CODE BEGIN (3) */
    int i=0;

    gioInit();
    mibspiInit();

    while(1)
    {
        if(1==gioGetBit(mibspiPORT3, PIN_CLK) ||  //pin7@J2, 0:pin2@J3 or pin1@J5, 1:pin1@J2
        1==gioGetBit(mibspiPORT3, PIN_CS3))  //pin9@J5, 0:pin2@J3 or pin1@J5, 1:pin1@J2
        {
            gioToggleBit(gioPORTB, 2);
        }
        gioToggleBit(gioPORTB, 1);

        for(i=0;i<DELAY_VALUE;i++);
    }

/* USER CODE END */

    return 0;
}

Is there something wrong or I need to do with CLK of MibSpi3 further ?

Best regards

Datïan