STM8教程實(shí)驗(yàn)2按鍵掃描

1、1/6實(shí)驗(yàn)二按鍵掃描按鍵掃描實(shí)際上就是對(duì)IO口的輸入捕捉操作，跟LED的剛好相反，LED的對(duì)10口輸出的操作，因此在操作上很相似的。相信大家會(huì)點(diǎn)亮LED的話，那么按鍵掃描的話也很容易了。先看下風(fēng)馳電子STM8開發(fā)板上的按鍵的硬件連接KEY1PD5PD6由電路連接圖來(lái)看，如果按鍵按下的話，IO口讀到的電平信號(hào)就是低電平。先看看按鍵掃描要用到的內(nèi)部資源stm8s.hp匚|二stm8sclk.hstm8sclk.cooKE3stm8s_gpio.hstm8s_gpio.c首先，我們從主函數(shù)看起按鍵模塊GXD2011風(fēng)馳電子STM8開發(fā)板intmain(void)*Infiniteloop朮設(shè)置內(nèi)部時(shí)

2、鐘止凹為主日CLK_HSIPrescalerConfig原1n7(1Oet.HighspeedintvoidButtomInit(void)很10口。上面的意思是對(duì)按鍵Buttoml、Buttom2、Buttom3的相應(yīng)口初始話為上拉輸入；沒觸發(fā)中斷。ffGPIO_Init(GPIOD,気tOm1|Buttm2|BUnOm3,GPlO_MODE_IN_PU_NOLlT);函數(shù)原口UJ型*添力口你的代碼*/ii(iKeyScan(Butt*briefInitializestheGPIO*paramGPIQx:SelecttheGF*paramGPIQPin:Thisparam*oftherefG

3、PIO_Pin_*paraniGPIOMode:Thispara*RefGPIOModeTypeDe*retvalNone7大/大Input/Outputmodese1ect-i/大i(uint8_t)(GPIQ_Mode)if(uint8_t)(GPIO_MocGPIOx-ODR|=(uint-Eelse/大LowlevelGPIOx-ODR&二(uirrtE/大SetOutputmode大/GPIO-DDR|=(uint8_t)G/*/大Pull-Up/Float(Input)orPuif(uint8_t)(GPIO_Mode)GPIO-CR1|=(uintS_t)GPIelse/太Flo

4、atorOpen-Drain按鍵的宏定義GPIOx-CRl&二(“(#defineButtomlGPIO_PIN設(shè)置的模式的定義t.ypedefenumGP10_M0DE_IN_FL_N0_TT=(uintGPIO_MODE_IN_PU_NO_IT=(uintGPIO_MODE_IN_FL_IT=(uint下面看看按鍵掃描的函數(shù)原型GPIO_MODE_OUT_OD_LOW_FAST=(uintGPIO_MODE_OUT_PP_LOW_FAST=(uintGPIO_MODE_OUT_OD_LOIiiJ_SLOlAl=(uintGPIO_MODE_OUT_PP_LOW_SLOUff=(uintGP

5、IO_MODE_OUT_OD_HIZ_FAST=(uintGPIO_MODE_OUTPP_HIGH_FAST=(uintGPIO_MODE_OUT_OD_HI2_SLOW=(uintGPIO_MODE_OUT_PP_HIGH_SLOW=(uin七BitStatusKeyScan(GPTOBitStatusButtomStatButtomStatus=Buttom_if(1GPIOReadinputPi:Buttom_ON口11-h1-r-iYfiHPP#define丑在看看另外一個(gè)函mDelav(；_/士01voidLedReverse(GPIOPiAPT門linTr數(shù)原AVAr=：AfCPTbriefno七eparampa;是ai單WritesreverseIThepor七mus七bwGPIOx:Select1PoftPin的:Spec:。所以在主函數(shù)里面的J-i-jrj-I一添加你的代碼*/if(iKeyScan(Buttoml)6/6的意思說(shuō)Buttoml按鍵按一下燈LED1就會(huì)亮，再按一下，燈就會(huì)滅，