interrupt.h File Reference

Interrupt functionality. More...

#include <stdint.h>
#include <stdbool.h>

Go to the source code of this file.

Functions
void	initGPIOwakeup (void)
	Initialize GPIO wake-up functionality. More...
bool	BTN_getTriggered (uint8_t number)
	Getter for the PB0_triggered and PB1_triggered variables. More...
void	BTN_setTriggered (uint8_t number, bool value)
	Setter for the PB0_triggered and PB1_triggered variable. More...

Detailed Description

Interrupt functionality.

Version

3.1

Author

Brecht Van Eeckhoudt

---

License

Copyright (C) 2019 - Brecht Van Eeckhoudt

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

A copy of the GNU General Public License can be found in the LICENSE file along with this source code.

Some methods use code obtained from examples from Silicon Labs' GitHub. These sections are licensed under the Silabs License Agreement. See the file "Silabs_License_Agreement.txt" for details. Before using this software for any purpose, you must agree to the terms of that agreement.

Definition in file interrupt.h.

Function Documentation

BTN_getTriggered()

bool BTN_getTriggered

(

uint8_t

number

)

Getter for the PB0_triggered and PB1_triggered variables.

Parameters

[in]

number

0 - PB0_triggered selected. 1 - PB1_triggered selected.

Returns

The value of PB0_triggered or PB1_triggered.

Definition at line 145 of file interrupt.c.

{
    if (number == 0) return (PB0_triggered);
    else if (number == 1) return (PB1_triggered);
    else
    {

#if DEBUG_DBPRINT == 1 /* DEBUG_DBPRINT */
        dbcrit("Non-existing button selected!");
#endif /* DEBUG_DBPRINT */

        error(18);

        return (false);
    }
}

BTN_setTriggered()

void BTN_setTriggered	(	uint8_t	number,
		bool	value
	)

Setter for the PB0_triggered and PB1_triggered variable.

Parameters

[in]	number	0 - PB0_triggered selected. 1 - PB1_triggered selected.
[in]	value	The boolean value to set to the selected variable.

Definition at line 174 of file interrupt.c.

{
    if (number == 0) PB0_triggered = value;
    else if (number == 1) PB1_triggered = value;
    else
    {

#if DEBUG_DBPRINT == 1 /* DEBUG_DBPRINT */
        dbcrit("Non-existing button selected!");
#endif /* DEBUG_DBPRINT */

        error(19);
    }
}

initGPIOwakeup()

void initGPIOwakeup

(

void

)

Initialize GPIO wake-up functionality.

Initialize buttons PB0 and PB1 on falling-edge interrupts and ADXL_INT1 on rising-edge interrupts.

Definition at line 91 of file interrupt.c.

{
    /* Enable necessary clocks (just in case) */
    CMU_ClockEnable(cmuClock_HFPER, true); /* GPIO is a High Frequency Peripheral */
    CMU_ClockEnable(cmuClock_GPIO, true);

    /* Configure PB0 and PB1 as input with glitch filter enabled, last argument sets pull direction */
    GPIO_PinModeSet(PB0_PORT, PB0_PIN, gpioModeInputPullFilter, 1);
    GPIO_PinModeSet(PB1_PORT, PB1_PIN, gpioModeInputPullFilter, 1);

    /* Configure ADXL_INT1 as input, the last argument enables the filter */
    GPIO_PinModeSet(ADXL_INT1_PORT, ADXL_INT1_PIN, gpioModeInput, 1);

    /* Clear all odd pin interrupt flags (just in case)
     * NVIC_ClearPendingIRQ(GPIO_ODD_IRQn); would also work but is less "readable" */
    GPIO_IntClear(0xAAAA);

    /* Clear all even pin interrupt flags (just in case)
     * NVIC_ClearPendingIRQ(GPIO_EVEN_IRQn); would also work but is less "readable" */
    GPIO_IntClear(0x5555);

    /* All pending interrupts can be cleared with GPIO_IntClear(0xFFFF); */

    /* Enable IRQ for even numbered GPIO pins */
    NVIC_EnableIRQ(GPIO_EVEN_IRQn);

    /* Enable IRQ for odd numbered GPIO pins */
    NVIC_EnableIRQ(GPIO_ODD_IRQn);

    /* Enable falling-edge interrupts for PB pins */
    GPIO_ExtIntConfig(PB0_PORT, PB0_PIN, PB0_PIN, false, true, true);
    GPIO_ExtIntConfig(PB1_PORT, PB1_PIN, PB1_PIN, false, true, true);

    /* Enable rising-edge interrupts for ADXL_INT1 */
    GPIO_ExtIntConfig(ADXL_INT1_PORT, ADXL_INT1_PIN, ADXL_INT1_PIN, true, false, true);

#if DEBUG_DBPRINT == 1 /* DEBUG_DBPRINT */
    dbinfo("GPIO wake-up initialized");
#endif /* DEBUG_DBPRINT */

}