CC26XX定时器以及按键中断

一.按键中断

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

@file board_key.c

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

Group: CMCU, SCS
Target Device: CC2640R2

******************************************************************************

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******************************************************************************
Release Name: simplelink_cc2640r2_sdk_1_40_00_45
Release Date: 2017-07-20 17:16:59
*****************************************************************************/

/*********************************************************************
* INCLUDES
*/
#include <stdbool.h>
#include <ti/sysbios/knl/Clock.h>
#include <ti/sysbios/family/arm/m3/Hwi.h>
#include <ti/sysbios/knl/Semaphore.h>
#include <ti/sysbios/knl/Queue.h>

#include <ti/drivers/pin/PINCC26XX.h>

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

#include <inc/hw_ints.h>

#include "util.h"
#include "board_key.h"
#include "board.h"

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

/*********************************************************************
* LOCAL FUNCTIONS
*/
static void Board_keyChangeHandler(UArg a0);
static void Board_keyCallback(PIN_Handle hPin, PIN_Id pinId);

/*******************************************************************************
* 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
Hwi_Struct callbackHwiKeys;

// PIN configuration structure to set all KEY pins as inputs with pullups enabled
PIN_Config keyPinsCfg[] =
{
#if defined(CC2650_LAUNCHXL) || defined(CC2640R2_LAUNCHXL) || defined(CC1350_LAUNCHXL)
Board_BTN1 | PIN_GPIO_OUTPUT_DIS | PIN_INPUT_EN | PIN_PULLUP,
Board_BTN2 | PIN_GPIO_OUTPUT_DIS | PIN_INPUT_EN | PIN_PULLUP,
#elif defined(CC2650DK_7ID) || defined(CC1350DK_7XD)
Board_KEY_SELECT | PIN_GPIO_OUTPUT_DIS | PIN_INPUT_EN | PIN_PULLUP,
Board_KEY_UP | PIN_GPIO_OUTPUT_DIS | PIN_INPUT_EN | PIN_PULLUP,
Board_KEY_DOWN | PIN_GPIO_OUTPUT_DIS | PIN_INPUT_EN | PIN_PULLUP,
Board_KEY_LEFT | PIN_GPIO_OUTPUT_DIS | PIN_INPUT_EN | PIN_PULLUP,
Board_KEY_RIGHT | PIN_GPIO_OUTPUT_DIS | PIN_INPUT_EN | PIN_PULLUP,
#endif
PIN_TERMINATE
};

PIN_State keyPins;
PIN_Handle hKeyPins;

/*********************************************************************
* 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 KEY pins. Enable int after callback registered
hKeyPins = PIN_open(&keyPins, keyPinsCfg);
PIN_registerIntCb(hKeyPins, Board_keyCallback);

#if defined(CC2650_LAUNCHXL) || defined(CC2640R2_LAUNCHXL) || defined(CC1350_LAUNCHXL)
PIN_setConfig(hKeyPins, PIN_BM_IRQ, Board_BTN1 | PIN_IRQ_NEGEDGE);
PIN_setConfig(hKeyPins, PIN_BM_IRQ, Board_BTN2 | PIN_IRQ_NEGEDGE);
#elif defined(CC2650DK_7ID) || defined(CC1350DK_7XD)
PIN_setConfig(hKeyPins, PIN_BM_IRQ, Board_KEY_SELECT | PIN_IRQ_NEGEDGE);
PIN_setConfig(hKeyPins, PIN_BM_IRQ, Board_KEY_UP | PIN_IRQ_NEGEDGE);
PIN_setConfig(hKeyPins, PIN_BM_IRQ, Board_KEY_DOWN | PIN_IRQ_NEGEDGE);
PIN_setConfig(hKeyPins, PIN_BM_IRQ, Board_KEY_LEFT | PIN_IRQ_NEGEDGE);
PIN_setConfig(hKeyPins, PIN_BM_IRQ, Board_KEY_RIGHT | PIN_IRQ_NEGEDGE);
#endif

#ifdef POWER_SAVING
//Enable wakeup
#if defined(CC2650_LAUNCHXL) || defined(CC2640R2_LAUNCHXL) || defined(CC1350_LAUNCHXL)
PIN_setConfig(hKeyPins, PINCC26XX_BM_WAKEUP, Board_BTN1 | PINCC26XX_WAKEUP_NEGEDGE);
PIN_setConfig(hKeyPins, PINCC26XX_BM_WAKEUP, Board_BTN2 | PINCC26XX_WAKEUP_NEGEDGE);
#elif defined(CC2650DK_7ID) || defined(CC1350DK_7XD)
PIN_setConfig(hKeyPins, PINCC26XX_BM_WAKEUP, Board_KEY_SELECT | PINCC26XX_WAKEUP_NEGEDGE);
PIN_setConfig(hKeyPins, PINCC26XX_BM_WAKEUP, Board_KEY_UP | PINCC26XX_WAKEUP_NEGEDGE);
PIN_setConfig(hKeyPins, PINCC26XX_BM_WAKEUP, Board_KEY_DOWN | PINCC26XX_WAKEUP_NEGEDGE);
PIN_setConfig(hKeyPins, PINCC26XX_BM_WAKEUP, Board_KEY_LEFT | PINCC26XX_WAKEUP_NEGEDGE);
PIN_setConfig(hKeyPins, PINCC26XX_BM_WAKEUP, Board_KEY_RIGHT | PINCC26XX_WAKEUP_NEGEDGE);
#endif
#endif //POWER_SAVING

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

// Set the application callback
appKeyChangeHandler = appKeyCB;
}

/*********************************************************************
* @fn Board_keyCallback
*
* @brief Interrupt handler for Keys
*
* @param none
*
* @return none
*/
static void Board_keyCallback(PIN_Handle hPin, PIN_Id pinId)
{
keysPressed = 0;

#if defined(CC2650_LAUNCHXL) || defined(CC2640R2_LAUNCHXL) || defined(CC1350_LAUNCHXL)
if ( PIN_getInputValue(Board_BTN1) == 0 )
{
keysPressed |= KEY_LEFT;
}

if ( PIN_getInputValue(Board_BTN2) == 0 )
{
keysPressed |= KEY_RIGHT;
}
#elif defined(CC2650DK_7ID) || defined(CC1350DK_7XD)
if ( PIN_getInputValue(Board_KEY_SELECT) == 0 )
{
keysPressed |= KEY_SELECT;
}

if ( PIN_getInputValue(Board_KEY_UP) == 0 )
{
keysPressed |= KEY_UP;
}

if ( PIN_getInputValue(Board_KEY_DOWN) == 0 )
{
keysPressed |= KEY_DOWN;
}

if ( PIN_getInputValue(Board_KEY_LEFT) == 0 )
{
keysPressed |= KEY_LEFT;
}

if ( PIN_getInputValue(Board_KEY_RIGHT) == 0 )
{
keysPressed |= KEY_RIGHT;
}
#endif

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);
}
}
/*********************************************************************
*********************************************************************/


1.首先设置PIN属性keyPinsCfg：设置了输入使能，以及上拉
2.Board_initKeys中PIN_setConfig设置了下降沿触发。

#define PIN_IRQ_DIS (PIN_GEN|(0x0<<16)) ///< (*) Disable IRQ on pin
#define PIN_IRQ_NEGEDGE (PIN_GEN|(0x5<<16)) ///< Enable IRQ on negative edge
#define PIN_IRQ_POSEDGE (PIN_GEN|(0x6<<16)) ///< Enable IRQ on positive edge
#define PIN_IRQ_BOTHEDGES (PIN_GEN|(0x7<<16)) ///< Enable IRQ on both edges3.Util_constructCl
4000
ock设置了回调函数。
4.  PIN_registerIntCb(hKeyPins, Board_keyCallback);设置驱动层回调

5.应用回调：

appKeyChangeHandler = appKeyCB;

*6.如果开启了低功耗，需要设置为：
PIN_setConfig(hKeyPins, PINCC26XX_BM_WAKEUP, Board_KEY_RIGHT | PINCC26XX_WAKEUP_NEGEDGE);

二.定时器
定时器使用前必须由Util_constructClock()函数创建，其运行模式由该函数的参数指定。

1.三个选项介绍：

定时器周期

#define SBP_PERIODIC_EVT_PERIOD1              500  
定时器事件的优先级

// Internal Events for RTOS application  

#define SBP_STATE_CHANGE_EVT                  0x0001  

一个定时器的数据结构

static Clock_Struct periodicClock;  

2.具体操作

//初始化定时器  

Util_constructClock(&GUA_periodicClock, SimpleBLEPeripheral_clockHandler,  

                    SBP_GUA_PERIODIC_EVT_PERIOD, 0, false, SBP_GUA_PERIODIC_EVT);  

  

//启动定时器  

Util_startClock(&GUA_periodicClock);    

void Util_stopClock(Clock_Struct *pClock)
{
Clock_Handle handle = Clock_handle(pClock);

// Stop clock instance
Clock_stop(handle);
}