STM32+按鍵調控PWM輸出+串口輸出占空比

#include STM32Libstm32f10x.h#include hal.h/* Function Name : GPIO_Configuration* 設置PD3,PD4,PD5,PD6為鍵盤輸入* 設置PB0,5,8,9; PC5,7; PD7 ;PA8 為輸出LED燈*/void GPIO_Configuration(void)GPIO_InitTypeDef GPIO_InitStructure;/*允許總線CLOCK,在使用GPIO之前必須允許相應端的時鐘.從STM32的設計角度上說,沒被允許的端將不接入時鐘,也就不會耗能,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#ifndef HAL_H#define HAL_H/硬件初始化extern void ChipHalInit(void);extern void ChipOutHalInit(void);/輸入宏定義#define GET_LEFT()(GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_8)#define GET_RIGHT()(GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_9)extern void USART1_Putc(u8 c);extern void USART_Configuration(void);extern void USART1_Puts(char * str);#endifTIM.c#include STM32Libstm32f10x.hvoid Tim1_Configuration(void)TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;TIM_OCInitTypeDef TIM_OCInitStructure;GPIO_InitTypeDef GPIO_InitStructure;/* PA8設置為功能腳(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時鐘配置*/TIM_TimeBaseStructure.TIM_Prescaler = 72;/預分頻(時鐘分頻)72M/72=1000KTIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;/向上計數TIM_TimeBaseStructure.TIM_Period = 2000;/裝載值 1000k/2000=500hzTIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;TIM_TimeBaseStructure.TIM_RepetitionCounter = 0x0;TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);/* Channel 1 Configuration in PWM mode */TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; /PWM模式2TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; /正向通道有效TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;/反向通道無效TIM_OCInitStructure.TIM_Pulse = 300; /占空時間TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; /輸出極性TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; /互補端的極性TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;TIM_OC1Init(TIM1,&TIM_OCInitStructure); /通道1/* TIM1 counter enable */TIM_Cmd(TIM1,ENABLE);/* TIM1 Main Output Enable */TIM_CtrlPWMOutputs(TIM1,ENABLE);/設置捕獲寄存器1void SetT1Pwm1(u16 pulse)TIM1-CCR1=pulse;main.c/*實驗名稱:PWM*功能:是PA8產生PWM輸出,按鍵調節(jié)占空比*/#include STM32Libstm32f10x.h#include hal.h#define SIZE 0u8 table11=0123456789 ;char buffer10=0000000000;void Delay(u16 n);void d_2_char(u32 x)bufferSIZE+0=tablex%10000000000/100000;bufferSIZE+1=tablex%1000000000/100000;bufferSIZE+2=tablex%100000000/100000;bufferSIZE+3=tablex%10000000/10000;bufferSIZE+4=tablex%1000000/10000;bufferSIZE+5=tablex%100000/10000;bufferSIZE+6=tablex%10000/1000;bufferSIZE+7=tablex%1000/100;bufferSIZE+8=tablex%100/10;bufferSIZE+9=tablex%10;/延遲函數void Delay(u16 speed)u16 i;while(speed!=0)speed-;for(i=0;i400;i+);extern void SetT1Pwm1(u16 pulse);int main(void)u16 pulse=300;ChipHalInit();/片內硬件初始化ChipOutHalInit();/片外硬件初始化for(;)if(GET_LEFT()=0)while(GET_LEFT()=0);if(pulse=2000)pulse+=30;/SetT1Pwm1(pulse);elsepulse=300; d_2_char(pulse);USAR