mbed环境下SAMR21开发板2：按键

今天这个程序是在昨天的基础上改的，经查SAMR21的按键在PA28

而这个定义同mbed的定义名称一模一样:


以下是mbed的管脚定义h文件：

复制

/* mbed Microcontroller Library

 * Copyright (c) 2006-2015 ARM Limited

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#ifndef MBED_PINNAMES_H

#define MBED_PINNAMES_H



#include "cmsis.h"



#ifdef __cplusplus

extern "C" {

#endif



typedef enum {

    PIN_INPUT,

    PIN_OUTPUT,

    PIN_INPUT_OUTPUT        //pin state can be set and read back

} PinDirection;



typedef enum {

    PA00  = 0,

    PA01  = 1,

    PA04  = 4,

    PA05  = 5,

    PA06  = 6,

    PA07  = 7,

    PA08  = 8,

    PA09  = 9,

    PA10  = 10,

    PA11  = 11,

    PA12  = 12,

    PA13  = 13,

    PA14  = 14,

    PA15  = 15,

    PA16  = 16,

    PA17  = 17,

    PA18  = 18,

    PA19  = 19,

    PA20  = 20,

    PA22  = 22,

    PA23  = 23,

    PA24  = 24,

    PA25  = 25,

    PA27  = 27,

    PA28  = 28,

    PA30  = 30,

    PA31  = 31,



    PB00  = 32,

    PB02  = 34,

    PB03  = 35,

    PB08  = 40,

    PB09  = 41,

    PB14  = 46,

    PB15  = 47,

    PB16  = 48,

    PB17  = 49,

    PB22  = 54,

    PB23  = 55,

    PB30  = 62,

    PB31  = 63,



    PC16 = 80,

    PC18 = 82,

    PC19 = 83,



    USBTX = PA04,

    USBRX = PA05,



    LED1 = PA19,

    LED2 = PA19,

    LED3 = PA19,

    LED4 = PA19,



    // Not connected

    NC = (int)0xFFFFFFFF

} PinName;



typedef enum {

    PullNone = 0,

    PullUp = 1,

    PullDown = 2,

    PullDefault = PullUp

} PinMode;



#ifdef __cplusplus

}

#endif



#endif

而我要做的就是把PA28给定义成为我自己的按键：

DigitalIn mybutton(PA28);

而其余的程序就简单了。

以下是程序截图：


以下是编译通过截图：


以下是通过Atmel Studio7.0下载BIN文件的载图：



程序成功后我验证了一下，运行正确，我一按按键灯就一直亮，我放开就开始闪