STM32 BUTTON方式(polling & interrupt) -

基于STM32 F401 discovery版实现button polling & interrupt点亮LED

本文引用地址: http://www.21ic.com/app/mcu/201808/781159.htm

/**

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

*@fileTemplate/main.c

*@authorMCDApplicationTeam

*@versionV1.0.0

*@date11-September-2013

*@briefMainprogrambody

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

*@attention

*

*

*

*LicensedunderMCD-STLibertySWLicenseAgreementV2,(the"License");

*YoumaynotusethisfileexceptincompliancewiththeLicense.

*YoumayobtainacopyoftheLicenseat:

*

*http://www.st.com/software_license_agreement_liberty_v2

*

*Unlessrequiredbyapplicablelaworagreedtoinwriting,software

*distributedundertheLicenseisdistributedonan"ASIS"BASIS,

*WITHOUTWARRANTIESORCONDITIONSOFANYKIND,eitherexpressorimplied.

*SeetheLicenseforthespecificlanguagegoverningpermissionsand

*limitationsundertheLicense.

*

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

*/

/*Includes------------------------------------------------------------------*/

#include"main.h"

/**@addtogroupTemplate

*@{

*/

/*Privatetypedef-----------------------------------------------------------*/

/*Privatedefine------------------------------------------------------------*/

#defineUSER_BUTTON_INTERRUPT

#defineKEY_ON0

#defineKEY_OFF1

/*Privatemacro-------------------------------------------------------------*/

/*Privatevariables---------------------------------------------------------*/

/*Privatefunctionprototypes-----------------------------------------------*/

staticvoidDelay(__IOuint32_tnCount);

uint8_tKey_Scan(GPIO_TypeDef*GPIOx,u16GPIO_Pin);

/*Privatefunctions---------------------------------------------------------*/

/**

*@briefMainprogram

*@paramNone

*@retvalNone

*/

intmain(void)

{

/*!

thisisdonethroughSystemInit()functionwhichiscalledfromstartup

file(startup_stm32f401xx.s)beforetobranchtoapplicationmain.

ToreconfigurethedefaultsettingofSystemInit()function,referto

system_stm32f4xx.cfile

*/

/*Addyourapplicationcodehere*/

/*InitializeLEDS*/

STM_EVAL_LEDInit(LED3);

STM_EVAL_LEDInit(LED4);

STM_EVAL_LEDInit(LED5);

STM_EVAL_LEDInit(LED6);

#ifdefUSER_BUTTON_INTERRUPT

/*Initializethebuttoninterrupt*/

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);

STM_EVAL_PBInit(BUTTON_USER,BUTTON_MODE_EXTI);

#endif

#ifdefUAER_BUTTON_POLLING

/*Initializethebuttonnormal*/

STM_EVAL_PBInit(BUTTON_USER,BUTTON_MODE_GPIO);

while(1)

{

if(Key_Scan(GPIOA,GPIO_Pin_0)==KEY_ON)

{

/*LED1·′×a*/

STM_EVAL_LEDToggle(LED3);

}

}

#endif

#ifdefLED_ON_OFF

while(1)

{

STM_EVAL_LEDOn(LED3);

/*Insertdelay*/

Delay(0x3FFFFF);

/*PD13tobetoggled*/

STM_EVAL_LEDOn(LED4);

/*Insertdelay*/

Delay(0x3FFFFF);

/*PD14tobetoggled*/

STM_EVAL_LEDOn(LED5);

/*Insertdelay*/

Delay(0x3FFFFF);

/*PD15tobetoggled*/

STM_EVAL_LEDOn(LED6);

/*Insertdelay*/

Delay(0x7FFFFF);

STM_EVAL_LEDOff(LED3);

STM_EVAL_LEDOff(LED4);

STM_EVAL_LEDOff(LED5);

STM_EVAL_LEDOff(LED6);

//GPIO_ResetBits(GPIOD,GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15);

/*Insertdelay*/

Delay(0xFFFFFF);

}

#endif

/*Infiniteloop*/

while(1)

{

}

}

#ifdefUSE_FULL_ASSERT

/**

*@briefReportsthenameofthesourcefileandthesourcelinenumber

*wheretheassert_paramerrorhasoccurred.

*@paramfile:pointertothesourcefilename

*@paramline:assert_paramerrorlinesourcenumber

*@retvalNone

*/

voidassert_failed(uint8_t*file,uint32_tline)

{

/*Usercanaddhisownimplementationtoreportthefilenameandlinenumber,

ex:printf("Wrongparametersvalue:file%sonline%drn",file,line)*/

/*Infiniteloop*/

while(1)

{

}

}

#endif

/**

*@}

*/

/**

*@briefDelayFunction.

*@paramnCount:specifiestheDelaytimelength.

*@retvalNone

*/

voidDelay(__IOuint32_tnCount)

{

while(nCount--)

{

}

}

/**