4.6.2 Pin Manager with Individual Pull-up

• Configure pins as inputs/outputs in the Pin Grid View

• These pins are then available in the Pins view, where the following can be configured:

  1. Custom Name

  2. Analog: Yes/No (Uncheck for digital only functionality).

  3. Start High: Yes/No (After SYSTEM_Initialize(), pin will be high).

  4. Weak Pullup: Yes/No (E.g. if Button connected to pin needs a pullup).

  5. Open Drain: Yes/No.

  6. Slew Rate: Yes/No (Limit the rate of change of the pin).

  7. Input Level Control: Yes/No.

  8. Interrupt on Change: None/Negative/Positive/Any. (e.g., One may want to sense a Negative edge on pin connected to an active low Button).

• Generate the code

• Add the code snippet(s) to the application code

• Program the board

• Pin Grid View:

  1. Select a LED pin, configure as Output.

• Pins:

  1. LED pin: Custom name "IO_LED".

#include "mcc_generated_files/system/system.h"
#include <util/delay.h>

int main(void) {
    SYSTEM_Initialize(); // Initialize the system

    while (1) {
        IO_LED_Toggle(); // Toggle the LED state
        _delay_ms(500); // Delay for 500 milliseconds
    }
}

• Pin Grid View:

  1. Select LED pin, configure as Output.

  2. Select BUTTON pin, configure as Input.

• Pins:

  1. LED pin: Custom name "IO_LED".

  2. BUTTON pin: Custom name "IO_BUTTON".

  3. BUTTON pin: Enable Weak Pullup if needed (Check board schematic).

#include "mcc_generated_files/system/system.h"

int main(void) {
    // Initialize the system
    SYSTEM_Initialize();

    while (1) {
        // Check if the button is pressed
        if (!IO_BUTTON_GetValue()) { // Assuming button is active low. Remove "!" if button is active high.
            // Turn on the LED
            IO_LED_SetLow(); // Assuming LED is active low. Swap IO_LED_SetLow()/IO_LED_SetHigh() if LED is active high.
        } else {
            // Turn off the LED
            IO_LED_SetHigh(); // Assuming LED is active low. Swap IO_LED_SetLow()/IO_LED_SetHigh() if LED is active high.
        }
    }
}

• Pin Grid View:

  1. Select LED pin, configure as Output.

  2. Select BUTTON pin, configure as Input.

• Pins:

  1. LED pin: Custom name "IO_LED".

  2. BUTTON pin: Custom name "IO_BUTTON".

  3. BUTTON pin: Enable Weak Pullup if needed (Check board schematic).

#include "mcc_generated_files/system/system.h"
#include <util/delay.h>

#define EDGE_DETECTED        (true)
#define EDGE_NOT_DETECTED    (false)

// Function to detect falling edge on button press
inline static bool NegEdgeDetectOnButton(void) {
    static bool lastState = false;

    bool const currentState = IO_BUTTON_GetValue();

    if (currentState != lastState && currentState == false) {
        lastState = currentState;
        return EDGE_DETECTED;
    } else {
        lastState = currentState;
        return EDGE_NOT_DETECTED;
    }
}

// Function to wait for button press
static void WaitButton(void) {
    while (true) {
        while (NegEdgeDetectOnButton() == EDGE_NOT_DETECTED) {
        }

        _delay_ms(50); // Delay for debounce

        if (!IO_BUTTON_GetValue()) {
            return;
        }
    }
}

void main(void) {
    // Initialize the system
    SYSTEM_Initialize();

    while (true) {
        WaitButton(); // Wait for button press
        IO_LED_Toggle(); // Toggle the LED state
    }
}

• Pin Grid View:

  1. Select LED pin, configure as Output.

  2. Select BUTTON pin, configure as Input.

• Pins:

  1. LED pin: Custom name "IO_LED".

  2. BUTTON pin: Custom name "IO_BUTTON".

  3. BUTTON pin: Enable Weak Pullup if needed (Check board schematic).

  4. BUTTON pin: Interrupt on Change: Sense negative/positive on BUTTON press (Check board schematic).

#include "mcc_generated_files/system/system.h"
#include <util/delay.h>
volatile bool BUTTON_PRESSED = false;

void BUTTON_Press_Callback(void) {
    // Toggle the LED
    IO_LED_Toggle();
    // Set the flag indicating button press
    BUTTON_PRESSED = true;
    Disable_global_interrupt();
}

int main(void) {
    // Initialize the system
    SYSTEM_Initialize();
    // Set the interrupt handler for button press
    IO_BUTTON_SetInterruptHandler(BUTTON_Press_Callback); //Find button pin for your board.

    Enable_global_interrupt();

    while (1) {
        // Check if button is pressed
        if (BUTTON_PRESSED) {
            // Clear the button pressed flag 
            BUTTON_PRESSED = false;
            // Delay for debouncing
            _delay_ms(50); //Debounce delay for button
            Enable_global_interrupt();
        }
    }
}