1、PWM

PWM配置

1. 配置時基單元
2. 配置輸出比較單元
3. 配置輸出PWM波的端口

#include "stm32f10x.h"                  // Device headervoid PWM_Init(void)
{
//**配置輸出PWM波的端口*****************************************************************RCC_APB2PeriphClockCmd (RCC_APB2Periph_GPIOA, ENABLE);// 使能GPIOA端口的時鐘，因為我們要使用這個端口來輸出PWM信號GPIO_InitTypeDef GPIO_InitStruct;GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0;GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;   GPIO_Init(GPIOA, &GPIO_InitStruct);
//*************************************************************************************
//**配置時基單元************************************************************************RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);//使能時鐘TIM_InternalClockConfig(TIM2);// 配置定時器的內(nèi)部時鐘模式//這段代碼的作用是將指定的定時器配置為內(nèi)部時鐘模式，即將定時器的時鐘源設(shè)置為內(nèi)部時鐘，而不是外部信號TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;//定義定時器基本時間配置結(jié)構(gòu)體TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;//設(shè)置定時器時鐘分頻（1分頻）TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;//計數(shù)模式（向上計數(shù)）TIM_TimeBaseInitStruct.TIM_Period = 100 - 1;//自動重裝載寄存器的值A(chǔ)RRTIM_TimeBaseInitStruct.TIM_Prescaler = 720 - 1;//預(yù)分頻器的值PSC//1khz    TIM_TimeBaseInitStruct.TIM_RepetitionCounter = 0;TIM_TimeBaseInit(TIM2, &TIM_TimeBaseInitStruct);
//*************************************************************************************
//**配置輸出比較單元********************************************************************TIM_OCInitTypeDef TIM_OCInitStruct;//定義輸出比較初始化結(jié)構(gòu)體TIM_OCStructInit(&TIM_OCInitStruct);//結(jié)構(gòu)體賦初始值TIM_OCInitStruct.TIM_OCMode = TIM_OCMode_PWM1;//輸出比較模式TIM_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_High;//輸出比較極性TIM_OCInitStruct.TIM_OutputState = TIM_OutputState_Enable;//輸出使能TIM_OCInitStruct.TIM_Pulse = 0;//設(shè)定CCR寄存器的值；更改CRR的值，以控制占空比（CCR/(ARR+1)）TIM_OC1Init(TIM2, &TIM_OCInitStruct);
//*************************************************************************************TIM_Cmd(TIM2, ENABLE);//啟用定時器，PB0口輸出PWM波
}void PWM_SetCompare1(uint16_t Compare)//設(shè)置CRR的值以控制占空比（CCR/(ARR+1)）
{TIM_SetCompare1(TIM2, Compare);
}

2、輸入捕獲配置

#include "stm32f10x.h"                  // Device header
//PWMI模式
//輸入捕獲測頻率 PA6口void IC_Init(void)
{//配置輸入捕獲的io口RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);GPIO_InitTypeDef GPIO_InitStruct;GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;GPIO_InitStruct.GPIO_Pin = GPIO_Pin_6;//PA6對應(yīng)TIM3GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;GPIO_Init(GPIOA, &GPIO_InitStruct);//配置時基單元RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);//開啟時鐘TIM_InternalClockConfig(TIM3);//配置定時器的內(nèi)部時鐘模式//這段代碼的作用是將指定的定時器配置為內(nèi)部時鐘模式，//即將定時器的時鐘源設(shè)置為內(nèi)部時鐘，而不是外部信號TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;//1分頻TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;//計數(shù)模式（向上計數(shù)）TIM_TimeBaseInitStruct.TIM_Period = 65536 - 1;//自動重裝載寄存器的值A(chǔ)RRTIM_TimeBaseInitStruct.TIM_Prescaler = 72 - 1;//預(yù)分頻器的值PSC TIM_TimeBaseInitStruct.TIM_RepetitionCounter = 0;TIM_TimeBaseInit(TIM3, &TIM_TimeBaseInitStruct);//配置輸入捕獲單元TIM_ICInitTypeDef TIM_ICInitStruct;TIM_ICInitStruct.TIM_Channel = TIM_Channel_1;//選擇通道1TIM_ICInitStruct.TIM_ICFilter = 0x10;//指定輸入捕獲過濾器TIM_ICInitStruct.TIM_ICPolarity = TIM_ICPolarity_Rising;//上升沿TIM_ICInitStruct.TIM_ICPrescaler = TIM_ICPSC_DIV1;//1分頻TIM_ICInitStruct.TIM_ICSelection = TIM_ICSelection_DirectTI;//直連通道TIM_ICInit(TIM3, &TIM_ICInitStruct);//自動配置通道2，下降沿TIM_PWMIConfig(TIM3, &TIM_ICInitStruct);//設(shè)置觸發(fā)源TIM_SelectInputTrigger(TIM3, TIM_TS_TI1FP1);//選擇從模式TIM_SelectSlaveMode(TIM3, TIM_SlaveMode_Reset);//啟動定時器TIM_Cmd(TIM3, ENABLE);
//*************************************************************************************
}uint32_t IC_GetFreq(void)//獲取頻率
{return 1000000 / ((TIM_GetCapture1(TIM3)) + 1);//TIM_GetCapture1此函數(shù)可獲取CCR1捕獲/比較器中的值
}uint32_t IC_GetDuty(void)
{return ((TIM_GetCapture2(TIM3) + 1) * 100)/(TIM_GetCapture1(TIM3) + 1);
}

3、編碼器

#include "stm32f10x.h"                  // Device headervoid Encoder2_Init(void)
{//配置GPIORCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);GPIO_InitTypeDef GPIO_InitStruct;GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IPU;GPIO_InitStruct.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;GPIO_Init(GPIOA, &GPIO_InitStruct);//配置時基單元RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);//開啟定時器時鐘TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;//不分頻TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;TIM_TimeBaseInitStruct.TIM_Period = 65536 - 1;//ARRTIM_TimeBaseInitStruct.TIM_Prescaler = 1 - 1;//PSCTIM_TimeBaseInitStruct.TIM_RepetitionCounter = 0;TIM_TimeBaseInit(TIM3, &TIM_TimeBaseInitStruct);TIM_ICInitTypeDef TIM_ICInitStruct;TIM_ICStructInit(&TIM_ICInitStruct);//配置通道1的濾波器和極性TIM_ICInitStruct.TIM_Channel = TIM_Channel_1;TIM_ICInitStruct.TIM_ICFilter = 0xF;TIM_ICInit(TIM3, &TIM_ICInitStruct);//配置通道2的濾波器和極性	TIM_ICInitStruct.TIM_Channel = TIM_Channel_2;TIM_ICInitStruct.TIM_ICFilter = 0xF;TIM_ICInit(TIM3, &TIM_ICInitStruct);TIM_EncoderInterfaceConfig(	TIM3, TIM_EncoderMode_TI12, TIM_ICPolarity_Rising, //不反向TIM_ICPolarity_Rising);//不反向-可控制極性TIM_Cmd(TIM3, ENABLE);
}int16_t Encoder_Get(void)
{return TIM_GetCounter(TIM3);
}int16_t Encoder_GetSpeed(void)
{int16_t Temp_Count = TIM_GetCounter(TIM3);TIM_SetCounter(TIM3, 0);//計數(shù)器清零return Temp_Count;}