STM32F103RCT6提供几路正交编码器？

houyanxu · 发表于 2016-3-16 16:58:14

采用TIM3 PA6，PA7正交编码器可以采集到
但换为TIM2 PA0，PA1 正交编码器采集不到？我两个定时器的配置完全一样

另外为什么我用TIM4 做PWM脉冲竟然没有输出？？

求教一下~
附上我的一段程序

void TIM4_PWM_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;//通用口结构体
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;//通用计时器结构体
TIM_OCInitTypeDef  TIM_OCInitStructure;//输出比较，即PWM的结构体定义

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE); // TIM2 挂载在APB1上，使能外部时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB , ENABLE);  //使能GPIO外设时钟使能

GPIO_InitStructure.GPIO_Pin =GPIO_Pin_6|GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
PBout(6)=0;//先置零
PBout(8)=0;

/*作为PWM输出IO配置*/
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_7|GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);

/*配置TIM4的时钟信息*/
TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值    80K
TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值  不分频
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim，不分频即为72MHz
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位

//配置output compare 寄存器
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //选择定时器模式:TIM脉冲宽度调制模式2
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
TIM_OCInitStructure.TIM_Pulse = 0; //设置待装入捕获比较寄存器的脉冲值
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
TIM_OC2Init(TIM4, &TIM_OCInitStructure);
TIM_OC4Init(TIM4, &TIM_OCInitStructure);

TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Enable);  //CH2预装载使能
TIM_OC4PreloadConfig(TIM4, TIM_OCPreload_Enable);  //CH4预装载使能
TIM_ARRPreloadConfig(TIM4, ENABLE); //使能TIMx在ARR上的预装载寄存器
TIM_Cmd(TIM4, ENABLE);  //使能TIM
TIM_SetCompare2(TIM4,0);//给两个PWM通道随意扔个值
TIM_SetCompare4(TIM4,0);
}
void TIM3_Encoder_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;//TI1 TIM3
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7; //TI2 TIM3
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;  //复用推挽输出
GPIO_Init(GPIOA, &GPIO_InitStructure);

TIM_DeInit(TIM3);
TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值    80K
TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值  不分频
TIM_TimeBaseStructure.TIM_ClockDivision =TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up ;
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure);

TIM_EncoderInterfaceConfig(TIM3,TIM_EncoderMode_TI12,TIM_ICPolarity_Rising,TIM_ICPolarity_Rising);
TIM_Cmd(TIM3, ENABLE);
}
void TIM2_Encoder_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;//TI
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; //TI2
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;  //复用推挽输出
GPIO_Init(GPIOA, &GPIO_InitStructure);

//TIM_DeInit(TIM2);
TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值    80K
TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值  不分频
TIM_TimeBaseStructure.TIM_ClockDivision =TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up ;
TIM_TimeBaseInit(TIM2,&TIM_TimeBaseStructure);
TIM_ClearFlag(TIM2, TIM_FLAG_Update);
TIM_EncoderInterfaceConfig(TIM2,TIM_EncoderMode_TI12,TIM_ICPolarity_Rising,TIM_ICPolarity_Rising);
TIM_Cmd(TIM2, ENABLE);
}