STM32+按鍵調(diào)控PWM輸出+串口輸出占空比

*FunctionName:GPIO_Configuration*設(shè)置PD3,PD4,PD5,PD6為鍵盤輸入*設(shè)置PB0,5,8,9;PC5,7;PD7;PA8為輸出LED燈voidGPIO_Configuration(void)

{GPIO_InitTypeDefGPIO_InitStructure;/*允許總線CLOCK,在使用GPIO之前必須允許相應(yīng)端的時(shí)鐘.從STM32的設(shè)計(jì)角度上說(shuō),沒(méi)被允許的端將不接入時(shí)鐘，也就不會(huì)耗能，這是STM32節(jié)能的一種技巧,*/RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);/*PC8按鍵輸入*/GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8;GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPU;//上拉輸入

GPIO_Init(GPIOC,&GPIO_InitStructure);/*PC9按鍵輸入*/GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9;GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPU;//上拉輸入

GPIO_Init(GPIOC,&GPIO_InitStructure);}hal.h#ifndefHAL_H#defineHAL_H〃硬件初始化externvoid ChipHaIInit(Void);externvoidChipOutHalInit(Void);〃輸入宏定義#defineGET_LEFT() (GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_8))#defineGET_RIGHT() (GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_9))externvoidUSARTIPutc(u8c);externvoidUSART_Configuration(Void)

externvoidUSARTI_Puts(Char*str);#endifTIM.cvoidTim1_Configuration(Void){TIMJimeBaseInitTypeDefTIMJimeBaseStructure;TIM_OCInitTypeDefTIM_OCInitStructure;GPIO_InitTypeDefGPIO_InitStructure;/*PA8設(shè)置為功能腳(PWM)*/GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8;GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;GPIO_Init(GPIOA,&GPIO_InitStructure);RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);TIM_DeInit(TIM1);/*TIM1時(shí)鐘配置*/TIMJrimeBaSeStrUCtUre.TIM_Prescaler=72; 〃預(yù)分頻(時(shí)鐘分頻)72M∕72=1000KTIM_TimeBaseStructure.TIM_CounterMode=TIMJCoUnterMode_Up; 〃向上計(jì)數(shù)TIMJrimeBaSeStrUCtUre.TIM_Period=2000; 〃裝載值1000k∕2000=500hzTIMJTimeBaSeStrUCtUre.TIMJZlockDivision=TIM_CKDJDIV1;TIMJTimeBaSeStrUCtUre.TIMjRepetitionCounter=0x0;TIMJTimeBaSeInit(TIMI,&TIM_TimeBaseStructure);∕*Channel1ConfigurationinPWMmode*/TIMJOCInitStrUCtUre.TIMJOCMode=TIMJOCModeJPWM2; //PWM模式2TIMJOCInitStrUCtUre.TIMJOUtpUtState=TIMJOUtpUtStateJEnable; 〃正向通道有效TIMJOCInitStrUCtUre.TIM—OutputNState=TIMJOUtpUtNStateJDiSable;//反向通道無(wú)效TIMJOCInitStrUCtUre.TIM—Pulse=300; 〃占空時(shí)間TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_Low; 〃輸出極性TIM_OCInitStructure.TIM_OCNPolarity=TIM_OCNPolarity_High; 〃互補(bǔ)端的極性TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Set;TIM_OCInitStructure.TIM_OCNIdleState=TIM_OCIdleState_Reset;TIM_OC1Init(TIMI,&TIM_OCInitStructure); 〃通道1/**TIM1counterenable*/

TIM_CInd(TIM1,ENABLE);/*TIM1MainOutputEnable*/

TIM_CtrlPWMOutputs(TIM1,ENABLE);}〃設(shè)置捕獲寄存器1voidSetTIPWm1(u16pulse)

{TIM1->CCR1=pulse;}main.C**實(shí)驗(yàn)名稱:PWM**功能:是PA8產(chǎn)生PWM輸出，按鍵調(diào)節(jié)占空比#defineSIZE0u8voidDelay(u16n);voidd_2_char(u32x)buffer[SIZE+0]=table[x%10000000000/100000];buffer[SIZE+1]=tabSe[x%1000000000/100000];buffer[SIZE+2]=table[x%100000000∕100000];buffer[SIZE+3]=table[x%10000000∕10000];buffer[SIZE+4]=table[x%1000000∕10000];buffer[SIZE+5]=table[x%100000∕10000];buffer[SIZE+6]=table[x%10000∕1000];buffer[SIZE+7]=table[x%1000∕100];buffer[SIZE+8]=table[x%100∕10];buffer[SIZE+9]=table[x%10];}〃延遲函數(shù)VoidDelay(u16speed){u16i;While(Speed!=0){speed--;for(i=0;i<400;i++);}}externvoidSetTIPWm1(u16pulse);intmain(void){u16PUlSe=300;ChipHalInit(); 〃片內(nèi)硬件初始化ChipOutHalInit(); 〃片外硬件初始化for(;;){if(GET_LEFT()==0){While(GET_LEFT()==0);if(pulse<=2000){pulse+=30;//SetTIPWm1(pul