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GPIO input at tms320f28027

Иван
Intellectual 370 points

Other Parts Discussed in Thread: TMS320F28027, DRV8301, CONTROLSUITE

Hello! I'm design a project at TMS320F28027 and DRV8301 for controlling the motor . I used a GPIO32 and 33 to enter the state of Hall sensors. When I run in debug mode - all works well. When I run out of flash , input from GPIO don't work, but all over function work well - UART communication, confrol the motor and main loop. What problem maybe with my project?

  • 0
    Guru 192875 points

    Hi,

    Иван said:
    When I run in debug mode - all works well.

    When you say all works well while in debug mode - do you mean you run the code from flash while debugging?

    Regards,

    Gautam

  • 0 in reply to Gautam Iyer
    Intellectual 370 points

    Yes, I run program from flash. I have defined FLASH symbol. In the code I have this:

    // Only used if running from FLASH
    // Note that the variable FLASH is defined by the project
    #ifdef FLASH
    // Copy time critical code and Flash setup code to RAM
    // The RamfuncsLoadStart, RamfuncsLoadEnd, and RamfuncsRunStart
    // symbols are created by the linker. Refer to the linker files.
    memCopy((uint16_t *)&RamfuncsLoadStart,(uint16_t *)&RamfuncsLoadEnd,(uint16_t *)&RamfuncsRunStart);
    #endif

    Init of my gpios are:

    GPIO_setPullUp(obj->gpioHandle,GPIO_Number_32,GPIO_PullUp_Enable);
    GPIO_setMode(obj->gpioHandle,GPIO_Number_32,GPIO_32_Mode_GeneralPurpose);
    GPIO_setHigh(obj->gpioHandle,GPIO_Number_32);
    GPIO_setDirection(obj->gpioHandle,GPIO_Number_32,GPIO_Direction_Input);

    GPIO_setPullUp(obj->gpioHandle,GPIO_Number_33,GPIO_PullUp_Enable);
    GPIO_setMode(obj->gpioHandle,GPIO_Number_33,GPIO_33_Mode_GeneralPurpose);
    GPIO_setHigh(obj->gpioHandle,GPIO_Number_33);
    GPIO_setDirection(obj->gpioHandle,GPIO_Number_33,GPIO_Direction_Input);

  • 0
    Intellectual 610 points
    Have you checked boot mode selection pins (GPIO 37 ,GPIO34 and TRST ) state refer datasheet page number 25 once
  • 0 in reply to raghu gundaala
    Intellectual 370 points

    This pins set for boot from flash. GPIO 37 ,GPIO34 set to high, TRST set to low. And program load normally, everything works except GPIO input...

  • 0 in reply to Иван
    Intellectual 610 points

    In debugging mode You are checking GPIO register or using any  variable ?

    and that is written in isr or some where else.please send the code which you have written

  • 0 in reply to raghu gundaala
    Intellectual 610 points
    Otherwise use capture(ECAP) for Hall sensor state reading.using capture interrupt you will get exact Hall sensor state.
  • 0 in reply to raghu gundaala
    Intellectual 370 points

    I use next code for get state of GPIO:

    iHall1Now=GPIO_getData(drvobj->gpioHandle,GPIO_Number_32);
    iHall2Now=GPIO_getData(drvobj->gpioHandle,GPIO_Number_33);
    if(CheckFallEdge0(iHall1Now))
    bRevers=1;
    else if(CheckFallEdge1(iHall2Now))
    bRevers=0;

    Function for check fall edge:

    int CheckFallEdge0(int iItem)
    {
    static int iPrev0=0;
    int iRet=0;
    if((iPrev0!=iItem)&&(iItem==0))
    iRet=1;
    else
    iRet=0;
    iPrev0=iItem;
    return iRet;
    }

    int CheckFallEdge1(int iItem)
    {
    static int iPrev1=0;
    int iRet=0;
    if((iPrev1!=iItem)&&(iItem==0))
    iRet=1;
    else
    iRet=0;
    iPrev1=iItem;
    return iRet;
    }

    For GPIO32 and GPIO33 f28027 don't have interrupt processing.

  • 0 in reply to Иван
    Intellectual 610 points
    Are you using watch dog timer in your code?
  • 0 in reply to raghu gundaala
    Intellectual 370 points
    No, watchdog timer disable.
  • 0 in reply to Иван
    Guru 192875 points
    That's pretty odd! Can you try commenting the rest of the code and check again. Also, try creating a new project or cleaning the current project and then rebuilding. Seems like compiler is misbehaving.

    Also, you've an option to try using the structured approach?
    Example codes here: C:\ti\controlSUITE\device_support\f2802x\v230\f2802x_examples_structs

    Regards,
    Gautam