AM2634-Q1: [MCAL]examples to detect rising edge

Hi SI,

To detect rising edge in GPIO, ICU is the only module.

Yes, ICU can be use concurrently.

No their is no limitation and we can use GPIO as input for ICU module.

Below code snip will help customer how can we do this:

Port_config:

    {
         .Port_PinId = 105,
         .Port_PullInhibitEnable = PORT_PIN_PULL_INHIBIT_DEFAULT,
         .Port_OutputOverride_Ctrl = 2,
         .Port_InputOverride_Ctrl = 2,
         .Port_DirectionChangeable = FALSE,
         .Port_PinModeChangeable = TRUE,
         .Port_PinLevelValue = PORT_PIN_LEVEL_HIGH,
         .Port_PinDirection = PORT_PIN_OUT,
         .Port_PinInitialMode =  PORT_PIN_MODE_GPIOEF,
         .Port_PullTypeSelect = PORT_PIN_PULLTYPE_DEFAULT,
         .Port_SlewControl = PORT_PIN_SLEWCONTROL_DEFAULT,
         .Port_NumPortModes = 1,
         .Port_PinMode =
         {            [0] =
            {


                .mode = PORT_PIN_MODE_GPIOEF,

                .muxmode = 7,
            },
         },
         .Port_PinDioRegId = (3 - 1U), /* GPIO register index is 0 based */
         .Port_PinDioChannelId = 6,
         .Port_RegOffsetAddr = PINK3_EPWM13_B,
         .Port_PinSignalName = (const sint8 *)"GPIOEF_70",
         .Port_PinName        = (const sint8 *)"PIN_K3",
         .Port_PinSetEdgeTrigger = FALSE,
         .Port_PinSelectEdgeTrigger = PORT_RISING_EDGE,
    },

Like this you can generate for different GPIO pin.

Icu_config: 

/* Icu Channel Configuration parameters */
CONST(struct Icu_ConfigType_s, ICU_CONFIG_DATA)
     IcuConfigSet =
{
    .icuMaxChannel = 1U,
    .chCfg =
    {
        [0] =
        {
            .defaultStartEdge = ICU_RISING_EDGE,/* Default start edge*/
            .xbarSelect = INPUT_XBAR_0,/* Xbar Select */
            .intrcapSelect =  ECAP_INT_ALLCAPS, /* Capture Event interupt enable */
            .measurementMode = ICU_MODE_SIGNAL_EDGE_DETECT,/* Measurement Mode*/
            .notificationHandler = (Icu_NotifyFuncType) Icu_SignalNotification_Channel1, /*Notification Function*/
            .instanceClkMHz = 200U,
            .prescaler = 0, /* prescale */
        }
    },
};

Here we are using xbar_0 .But can be used anything.

XBar_config:

// for getting gpio output as input in ecap
// In the second argument select the input_xbar you are selecting , so that with help of this you can configure whichever xbar you want to use for input to get into the icu
    SOC_xbarSelectInputXBarInputSource(CSL_CONTROLSS_INPUTXBAR_U_BASE, 0, 0, INPUT_XBAR_GPIO70, 0);
    SOC_xbarSelectInterruptXBarInputSource(CSL_CONTROLSS_INTXBAR_U_BASE, 22, 0, 0, 0, 0, 0, ( INT_XBAR_ECAP0_INT ), 0);

Gpio_usage:

    if (mode == ICU_MODE_SIGNAL_EDGE_DETECT)
    {
        AppUtils_printf( APP_NAME ": Edge Detect Mode! \n\r");

        inputstate = Icu_GetInputState(ICU_CHANNEL);
        if(inputstate == ICU_ACTIVE)
           AppUtils_printf( APP_NAME ": input state is ICU_ACTIVE\n\r");
        else if (inputstate == ICU_IDLE)
           AppUtils_printf( APP_NAME ": input state is ICU_IDLE \n\r");

        Icu_EnableNotification(ICU_CHANNEL);

        Icu_EnableEdgeDetection(ICU_CHANNEL);

        uint32 counter=0;
        while(counter<10)
        { Dio_FlipChannel(70);
          volatile int v=0;
          while(v<1000)v++;
          counter++;
        }

        AppUtils_printf( APP_NAME ": SignalNotification for Single(Rising) Edge Detection Reached in 1 sec: %d \n\r", Icu_SignalNotificationNumber);
        Icu_SignalNotificationNumber = 0U;

        Icu_DisableEdgeDetection(ICU_CHANNEL);
    }

Like this customer can use GPIO as input to ICU.

Hope this information will help customer.

Thanks 

Yes , 10 different GPIOs edge detection can be checked simultaneously with 10 ecap instances.

Thanks

Yup, The code snippit which i had shared is for GPIO port configuration.

For ICU , the port config is default only, which we are providing in recommended configuration of port.

Thanks

Mudit