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tim_encoder_mode_example.c
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tim_encoder_mode_example.c
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/*
基于定时器的编码器模式来采集编码器的脉冲值。
void tim3_encoder_configration(void) 为STM32L151 使用
void t5_encoder_configration(void) 为STM32F10X使用
*/
#include"stm32l1xx_tim.h"
void tim3_encoder_configration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_ICInitTypeDef TIM_ICInitStructure;
/* TIM3 clock source enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
/* Enable GPIO clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
/* Connect PA6 to TIM3_CH_1 */
GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_TIM3);
/* Connect PA7 to TIM3_CH_2 */
GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_TIM3);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7; // 使用 PA6,PA7
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Timer configuration in Encoder mode */
TIM_DeInit(TIM3); //TIM3 复位
TIM_TimeBaseStructure.TIM_Prescaler = 0x0; // No prescaling
TIM_TimeBaseStructure.TIM_Period = 10000;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
// 设置TIM3为编码模式1, 编码器值x2
TIM_EncoderInterfaceConfig(TIM3, TIM_EncoderMode_TI1, TIM_ICPolarity_Falling, TIM_ICPolarity_Falling);
TIM_ICStructInit(&TIM_ICInitStructure); // 初始化
TIM_ICInitStructure.TIM_ICFilter = 15; // 0～15 值越大，抗干扰越强。
TIM_ICInit(TIM3, &TIM_ICInitStructure);
//Reset counter
TIM3->CNT = 0; // 该寄存器为编码器的值
TIM_Cmd(TIM3, ENABLE);
}
/************************************************************************************************/
#include "stm32f10x_tim.h"
void t5_encoder_configration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_ICInitTypeDef TIM_ICInitStructure;
/* TIM5 clock source enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE);
//PA0-A相, PA1-B相
GPIO_StructInit(&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1; // 使用PA0,PA1
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
/* Timer configuration in Encoder mode */
TIM_DeInit(TIM5); //TIM5复位
TIM_TimeBaseStructure.TIM_Prescaler = 0x0; // No prescaling
TIM_TimeBaseStructure.TIM_Period = 10000;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM5, &TIM_TimeBaseStructure);
// 设TIM5为编码模式3
TIM_EncoderInterfaceConfig(TIM5, TIM_EncoderMode_TI12, TIM_ICPolarity_Rising, TIM_ICPolarity_Rising);
TIM_ICStructInit(&TIM_ICInitStructure); // 初始化为默认值
TIM_ICInitStructure.TIM_ICFilter = 6;
TIM_ICInit(TIM5, &TIM_ICInitStructure);
//Reset counter
TIM5->CNT = 0;
TIM_Cmd(TIM5, ENABLE);
}
// TIM5->CNT的内容就是编码器的计数脉冲。
/************************************************************************************************/