CC2642R: OAD Resources and sample projects for latest SDK 6.xx

/******************************************************************************

 @file  board_key.c

 @brief This file contains the interface to the SRF06EB Key Service.

 Group: WCS, BTS
 Target Device: cc13xx_cc26xx

 ******************************************************************************
 
 Copyright (c) 2014-2022, Texas Instruments Incorporated
 All rights reserved.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:

 *  Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.

 *  Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.

 *  Neither the name of Texas Instruments Incorporated nor the names of
    its contributors may be used to endorse or promote products derived
    from this software without specific prior written permission.

 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 ******************************************************************************
 
 
 *****************************************************************************/

/*********************************************************************
 * INCLUDES
 */
#include <stdbool.h>

#ifdef FREERTOS
#include <ti/drivers/dpl/HwiP.h>
#include <ti/drivers/dpl/SwiP.h>
#else
#include <ti/sysbios/knl/Clock.h>
#include <ti/sysbios/knl/Semaphore.h>
#include <ti/sysbios/knl/Queue.h>
#include <ti/sysbios/family/arm/m3/Hwi.h>
#endif

#include <ti/drivers/GPIO.h>
#include <ti/drivers/gpio/GPIOCC26XX.h>

#ifdef USE_ICALL
#include <icall.h>
#endif

#include <inc/hw_ints.h>

#include "util.h"
#include "board_key.h"
#include <ti_drivers_config.h>

#ifdef FREERTOS
typedef void* UArg;
#endif

/*********************************************************************
 * TYPEDEFS
 */

/*********************************************************************
 * LOCAL FUNCTIONS
 */
static void Board_keyChangeHandler(UArg a0);
static void GPIO_Board_keyCallback(uint_least8_t index);
/*******************************************************************************
 * EXTERNAL VARIABLES
 */

/*********************************************************************
 * LOCAL VARIABLES
 */

// Value of keys Pressed
static uint8_t keysPressed;

// Key debounce clock
static Clock_Struct keyChangeClock;

// Pointer to application callback
keysPressedCB_t appKeyChangeHandler = NULL;

// Memory for the GPIO module to construct a Hwi
#ifdef FREERTOS
HwiP_Struct callbackHwiKeys;
#else
Hwi_Struct callbackHwiKeys;
#endif

/*********************************************************************
 * PUBLIC FUNCTIONS
 */
/*********************************************************************
 * @fn      Board_initKeys
 *
 * @brief   Enable interrupts for keys on GPIOs.
 *
 * @param   appKeyCB - application key pressed callback
 *
 * @return  none
 */
void Board_initKeys(keysPressedCB_t appKeyCB)
{
  // Initialize GPIO
  GPIO_setConfig(CONFIG_GPIO_BTN1, GPIO_CFG_IN_PU | GPIO_CFG_IN_INT_FALLING);
  GPIO_setConfig(CONFIG_GPIO_BTN2, GPIO_CFG_IN_PU | GPIO_CFG_IN_INT_FALLING);
  // Set callback function
  GPIO_setCallback(CONFIG_GPIO_BTN1, GPIO_Board_keyCallback);
  GPIO_setCallback(CONFIG_GPIO_BTN2, GPIO_Board_keyCallback);
  // Enable interrupt
  GPIO_enableInt(CONFIG_GPIO_BTN1);
  GPIO_enableInt(CONFIG_GPIO_BTN2);

  // Setup keycallback for keys
  Util_constructClock(&keyChangeClock, Board_keyChangeHandler,
                      KEY_DEBOUNCE_TIMEOUT, 0, false, 0);

  // Set the application callback
  appKeyChangeHandler = appKeyCB;
#ifdef POWER_SAVING
  //Enable wakeup - store current configure in temporary variable and update pinConfig
  GPIO_PinConfig currConfig;
  GPIO_getConfig(CONFIG_GPIO_BTN1, &currConfig);
  GPIO_setConfig(CONFIG_GPIO_BTN1, currConfig | GPIO_CFG_STANDBY_WAKE_ON);
  GPIO_setConfig(CONFIG_GPIO_BTN2, currConfig | GPIO_CFG_STANDBY_WAKE_ON);
#endif
}

/*********************************************************************
 * @fn      GPIO_Board_keyCallback
 *
 * @brief   Interrupt handler for Keys for GPIO++ module
 *
 * @param   none
 *
 * @return  none
 */
static void GPIO_Board_keyCallback(uint_least8_t index)
{
  keysPressed = 0;
  if ( GPIO_read(CONFIG_GPIO_BTN1) == 0 )
  {
    keysPressed |= KEY_LEFT;
  }
  if ( GPIO_read(CONFIG_GPIO_BTN2) == 0 )
  {
    keysPressed |= KEY_RIGHT;
  }
  Util_startClock(&keyChangeClock);
}

/*********************************************************************
 * @fn      Board_keyChangeHandler
 *
 * @brief   Handler for key change
 *
 * @param   UArg a0 - ignored
 *
 * @return  none
 */
static void Board_keyChangeHandler(UArg a0)
{
  if (appKeyChangeHandler != NULL)
  {
    // Notify the application
    (*appKeyChangeHandler)(keysPressed);
  }
}
/*********************************************************************
*********************************************************************/