hal_button.c

裡面有許多cc2430的範例code

/***********************************************************************************
    Filename:     hal_button.c

    Description:  HAL button implementation for CCSoC + SmartRF04EB

    Copyright 2007 Texas Instruments, Inc.
***********************************************************************************/
#include "hal_types.h"
#include "hal_board.h"
#include "hal_button.h"
#include "hal_cc8051.h"


/******************************************************************************
* @fn  halButtonInit
*
* @brief
*      Initializes the button functionality
*
* Parameters:
*
* @param  void
*
* @return void
*
******************************************************************************/
void halButtonInit(void)
{
    // Button push input
    MCU_IO_INPUT(HAL_BOARD_IO_BTN_1_PORT, HAL_BOARD_IO_BTN_1_PIN, MCU_IO_TRISTATE);
}


/******************************************************************************
* @fn  halButtonPushed
*
* @brief
*      This function detects if 'S1' is being pushed. The function
*      implements software debounce. Return true only if previuosly called
*      with button not pushed. Return true only once each time the button
*      is pressed.
*
* Parameters:
*
* @param  void
*
* @return uint8
*          HAL_BUTTON_1:    Button is being pushed
*          HAL_BUTTON_NONE: Button is not being pushed
*
******************************************************************************/
uint8 halButtonPushed(void)
{
    uint8 i;
    uint8 value;
    static uint8 prevValue;

    if (value = HAL_BUTTON_1_PUSHED()){
        for(i = 0; i < 10; i++) {
            if(!HAL_BUTTON_1_PUSHED()){
                value = HAL_BUTTON_NONE;
                break;
            }
        }
    }

    if (value){
        if (!prevValue){
            value = prevValue = HAL_BUTTON_1;
            halMcuWaitMs(50);
        }
        else {
            value = HAL_BUTTON_NONE;
        }
    }
    else{
        prevValue = HAL_BUTTON_NONE;
    }

    return value;
}

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