294 lines
9.0 KiB
C
294 lines
9.0 KiB
C
/**************************************************************************************************
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Filename: hal_key.c
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Revised: $Date:$
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Revision: $Revision:$
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Description: This file contains the interface to the H/W Key driver.
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Copyright 2006-2010 Texas Instruments Incorporated. All rights reserved.
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IMPORTANT: Your use of this Software is limited to those specific rights
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granted under the terms of a software license agreement between the user
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who downloaded the software, his/her employer (which must be your employer)
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and Texas Instruments Incorporated (the "License"). You may not use this
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Software unless you agree to abide by the terms of the License. The License
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limits your use, and you acknowledge, that the Software may not be modified,
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copied or distributed unless embedded on a Texas Instruments microcontroller
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or used solely and exclusively in conjunction with a Texas Instruments radio
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frequency transceiver, which is integrated into your product. Other than for
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the foregoing purpose, you may not use, reproduce, copy, prepare derivative
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works of, modify, distribute, perform, display or sell this Software and/or
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its documentation for any purpose.
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YOU FURTHER ACKNOWLEDGE AND AGREE THAT THE SOFTWARE AND DOCUMENTATION ARE
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PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED,
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INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, TITLE,
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NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL
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TEXAS INSTRUMENTS OR ITS LICENSORS BE LIABLE OR OBLIGATED UNDER CONTRACT,
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NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION, BREACH OF WARRANTY, OR OTHER
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LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT DAMAGES OR EXPENSES
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INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL, INDIRECT, PUNITIVE
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OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, COST OF PROCUREMENT
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OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY CLAIMS BY THIRD PARTIES
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(INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), OR OTHER SIMILAR COSTS.
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Should you have any questions regarding your right to use this Software,
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contact Texas Instruments Incorporated at www.TI.com.
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**************************************************************************************************/
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/* ------------------------------------------------------------------------------------------------
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* Includes
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* ------------------------------------------------------------------------------------------------
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*/
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#include "hal_board.h"
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#include "hal_drivers.h"
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#include "hal_key.h"
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#include "hal_types.h"
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#include "osal.h"
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#include "usb_interrupt.h"
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/* ------------------------------------------------------------------------------------------------
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* Macros
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* ------------------------------------------------------------------------------------------------
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*/
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#define HAL_KEY_CLR_INT() \
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st ( \
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/* PxIFG has to be cleared before PxIF. */\
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P1IFG = 0; \
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P1IF = 0; \
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)
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/* ------------------------------------------------------------------------------------------------
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* Constants
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* ------------------------------------------------------------------------------------------------
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*/
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/* ------------------------------------------------------------------------------------------------
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* Typedefs
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* ------------------------------------------------------------------------------------------------
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*/
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/* ------------------------------------------------------------------------------------------------
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* Global Variables
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* ------------------------------------------------------------------------------------------------
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*/
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uint8 Hal_KeyIntEnable;
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/* ------------------------------------------------------------------------------------------------
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* Global Functions
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* ------------------------------------------------------------------------------------------------
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*/
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/* ------------------------------------------------------------------------------------------------
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* Local Variables
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* ------------------------------------------------------------------------------------------------
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*/
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static halKeyCBack_t pHalKeyProcessFunction;
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static volatile uint8 isrKeys;
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static uint8 halKeys;
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/* ------------------------------------------------------------------------------------------------
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* Local Functions
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* ------------------------------------------------------------------------------------------------
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*/
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/**************************************************************************************************
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* @fn HalKeyInit
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*
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* @brief This function is called by HalDriverInit to initialize the H/W keys.
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*
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* input parameters
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*
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* None.
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*
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* output parameters
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*
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* None.
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*
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* @return None.
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**************************************************************************************************
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*/
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void HalKeyInit(void)
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{
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}
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/**************************************************************************************************
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* @fn HalKeyConfig
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*
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* @brief This function is called by HalDriverInit to initialize the H/W keys.
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*
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* input parameters
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*
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* @param interruptEnable - TRUE/FALSE to enable the key interrupt.
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* @param cback - The callback function for the key change event.
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*
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* output parameters
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*
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* None.
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*
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* @return None.
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**************************************************************************************************
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*/
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void HalKeyConfig(bool interruptEnable, halKeyCBack_t cback)
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{
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if ((Hal_KeyIntEnable = interruptEnable))
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{
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HAL_KEY_CLR_INT(); // Clear spurious ints.
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PICTL |= 0x01; // P1ICONL: Falling edge ints on pins 0-3.
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P1IEN |= PUSH1_BV | PUSH2_BV; // Enable specific P1 bits for ints by bit mask.
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IEN2 |= 0x10; // Enable general P1 interrupts.
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}
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else
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{
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(void)osal_set_event(Hal_TaskID, HAL_KEY_EVENT);
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}
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pHalKeyProcessFunction = cback;
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}
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/**************************************************************************************************
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* @fn HalKeyPoll
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*
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* @brief This function is called by Hal_ProcessEvent() on a HAL_KEY_EVENT.
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*
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* input parameters
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*
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* None.
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*
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* output parameters
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*
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* None.
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*
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* @return None.
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**************************************************************************************************
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*/
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void HalKeyPoll(void)
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{
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uint8 newKeys;
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if (Hal_KeyIntEnable)
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{
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halIntState_t intState;
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HAL_ENTER_CRITICAL_SECTION(intState);
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newKeys = isrKeys;
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isrKeys = 0;
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HAL_EXIT_CRITICAL_SECTION(intState);
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}
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else
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{
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uint8 keys = HalKeyRead();
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newKeys = (halKeys ^ keys) & keys;
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halKeys = keys;
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}
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if (newKeys && pHalKeyProcessFunction)
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{
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(pHalKeyProcessFunction)(newKeys, HAL_KEY_STATE_NORMAL);
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}
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}
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/**************************************************************************************************
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* @fn HalKeyRead
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*
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* @brief This function is called anywhere.
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*
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* input parameters
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*
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* None.
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*
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* output parameters
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*
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* None.
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*
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* @return The bit mask of all keys pressed.
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**************************************************************************************************
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*/
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uint8 HalKeyRead(void)
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{
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uint8 keys = 0;
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if (HAL_PUSH_BUTTON1())
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{
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keys |= HAL_KEY_SW_1;
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}
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if (HAL_PUSH_BUTTON2())
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{
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keys |= HAL_KEY_SW_2;
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}
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return keys;
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}
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/**************************************************************************************************
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* @fn HalKeyEnterSleep
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*
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* @brief - Get called to enter sleep mode
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*
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* @param
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*
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* @return
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**************************************************************************************************/
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void HalKeyEnterSleep ( void )
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{
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}
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/**************************************************************************************************
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* @fn HalKeyExitSleep
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*
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* @brief - Get called when sleep is over
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*
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* @param
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*
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* @return - return saved keys
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**************************************************************************************************/
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uint8 HalKeyExitSleep ( void )
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{
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/* Wake up and read keys */
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return ( HalKeyRead () );
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}
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/**************************************************************************************************
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* @fn usbKeyISR
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*
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* @brief This function is the ISR for the Port2 USB/Key interrupt.
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*
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* input parameters
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*
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* None.
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*
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* output parameters
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*
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* None.
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*
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* @return None.
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**************************************************************************************************
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*/
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HAL_ISR_FUNCTION( usbKeyISR, P1INT_VECTOR )
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{
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HAL_ENTER_ISR();
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if (P1IFG & PUSH1_BV)
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{
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isrKeys |= HAL_KEY_SW_1;
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}
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if (P1IFG & PUSH2_BV)
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{
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isrKeys |= HAL_KEY_SW_2;
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}
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HAL_KEY_CLR_INT();
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(void)osal_set_event(Hal_TaskID, HAL_KEY_EVENT);
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HAL_EXIT_ISR();
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}
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/**************************************************************************************************
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*/
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