急！定时器3用固件库版本怎么输出多路pwm

beyond1219 · 发表于 2014-6-15 14:16:54

STM32F103的定时3输出4路PWM问题。
我修改的是原子的固件库版本例程，加上的IO口没PWM输出，求解。

[mw_shl_code=c,true]void TIM3_PWM_Init(u16 arr,u16 psc) { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //使能定时器3时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE); //使能GPIO外设和AFIO复用功能模块时钟 GPIO_PinRemapConfig(GPIO_PartialRemap_TIM3, ENABLE); //Timer3部分重映射 TIM3_CH2->

B5 //设置该引脚为复用输出功能,输出TIM3 CH2的PWM脉冲波形 GPIOB.5 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5|GPIO_Pin_3 | GPIO_Pin_10 | GPIO_Pin_11; //TIM_CH2 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIO //初始化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 TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值 TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数模式 TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位 //初始化TIM3 Channel2 PWM模式 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //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_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高 TIM_OC2Init(TIM3, &TIM_OCInitStructure); //根据T指定的参数初始化外设TIM3 OC2 TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable); //使能TIM3在CCR2上的预装载寄存器 TIM_Cmd(TIM3, ENABLE); //使能TIM3[/mw_shl_code]

[mw_shl_code=c,true]void TIM3_Int_Init(u16 arr,u16 psc) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //时钟使能 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计数到5000为500ms TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值 10Khz的计数频率 TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM向上计数模式 TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位 TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE ); //使能指定的TIM3中断,允许更新中断 NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //TIM3中断 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //先占优先级0级 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //从优先级3级 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能 NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器 TIM_Cmd(TIM3, ENABLE); //使能TIMx外设 } //定时器3中断服务程序 void TIM3_IRQHandler(void) //TIM3中断 { if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) //检查指定的TIM中断发生与否:TIM 中断源 { TIM_ClearITPendingBit(TIM3, TIM_IT_Update ); //清除TIMx的中断待处理位:TIM 中断源 LED1=!LED1; } } [/mw_shl_code]

beyond1219 · 发表于 2014-6-15 14:16:55

void TIM3_PWM_Init(u16 arr,u16 psc)
{
       GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOC, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3 | RCC_APB1Periph_TIM4, ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC,&GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13  | GPIO_Pin_14  | GPIO_Pin_15 ;
GPIO_Init(GPIOD,&GPIO_InitStructure);

GPIO_PinRemapConfig(GPIO_FullRemap_TIM3,ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_TIM4,ENABLE);

TIM_TimeBaseStructure.TIM_Period = 3000;       //PWM周期
TIM_TimeBaseStructure.TIM_Prescaler = 72 - 1;      //设置预分频：即为1MHz
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //设置时钟分频系数：不分频
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;   //向上计数模式

TIM_TimeBaseStructure.TIM_Period = 2500; //PWM周期
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
TIM_TimeBaseStructure.TIM_Period = 2500; //PWM周期
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //配置为PWM模式1
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 1500; //设置跳变值，当计数器计数到这个值时，电平发生跳变
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //当定时器计数值小于CCR1_Val时为高电平

TIM_OC1Init(TIM3, &TIM_OCInitStructure); //使能通道1
TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable); //TIM3
TIM_OC1Init(TIM4, &TIM_OCInitStructure); //使能通道1
TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable); //TIM4

  /*

WM1 Mode configuration: Channel2 */
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

TIM_OC2Init(TIM3, &TIM_OCInitStructure);   //使能通道2
TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);
TIM_OC2Init(TIM4, &TIM_OCInitStructure);   //使能通道2
TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Enable);

  /*

WM1 Mode configuration: Channel3 */
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

TIM_OC3Init(TIM3, &TIM_OCInitStructure); //使能通道3
TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);
TIM_OC3Init(TIM4, &TIM_OCInitStructure); //使能通道3
TIM_OC3PreloadConfig(TIM4, TIM_OCPreload_Enable);

/*

WM1 Mode configuration: Channel4 */
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

TIM_OC4Init(TIM3, &TIM_OCInitStructure); //使能通道4
TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);
TIM_OC4Init(TIM4, &TIM_OCInitStructure); //使能通道4
TIM_OC4PreloadConfig(TIM4, TIM_OCPreload_Enable);

TIM_ARRPreloadConfig(TIM3, ENABLE); // 使能TIM3重载寄存器ARR
TIM_ARRPreloadConfig(TIM4, ENABLE); // 使能TIM4重载寄存器ARR

TIM_Cmd(TIM3, ENABLE); //使能定时器3
TIM_Cmd(TIM4, ENABLE); //使能定时器4
}
总于解决了，高兴啊！还的靠自己

北方的马克思 · 发表于 2014-6-15 21:51:08

PWM——Init中你只配置TIM3_CH2 ，怎么可能有多路PWM输出？

beyond1219 · 发表于 2014-6-15 22:19:27

回复【2楼】北方的马克思:
---------------------------------
void TIM3_PWM_Init(u16 arr,u16 psc)
{
// u16 CCR1_Val = 500;
//    u16 CCR2_Val = 375;
//    u16 CCR3_Val = 250;
//    u16 CCR4_Val = 125;
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //使能定时器3时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB  | RCC_APB2Periph_AFIO, ENABLE);  //使能GPIO外设和AFIO复用功能模块时钟
GPIO_PinRemapConfig(GPIO_PartialRemap_TIM3, ENABLE); //Timer3部分重映射  TIM3_CH2->

B5

   //设置该引脚为复用输出功能,输出TIM3 CH2的PWM脉冲波形 GPIOB.5
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5|GPIO_Pin_3 | GPIO_Pin_10 | GPIO_Pin_11; //TIM_CH2
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIO
   //初始化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
TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位

//初始化TIM3 Channel2

WM模式
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //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_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
TIM_OC2Init(TIM3, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM3 OC2

TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);  //使能TIM3在CCR2上的预装载寄存器
//TIM_Cmd(TIM3, ENABLE);  //使能TIM3
  TIM_OCInitStructure.TIM_Pulse = CCR1_Val;    //设置跳变值，当计数器计数到这个值时，电平发生跳变
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;  //当定时器计数值小于CCR1_Val时为高电平

  TIM_OC1Init(TIM3, &TIM_OCInitStructure);   //使能通道1

  TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);

  /*

WM1 Mode configuration: Channel2 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR2_Val;   //设置通道2的电平跳变值，输出另外一个占空比的PWM

  TIM_OC2Init(TIM3, &TIM_OCInitStructure);    //使能通道2

  TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);

  /*

WM1 Mode configuration: Channel3 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR3_Val; //设置通道3的电平跳变值，输出另外一个占空比的PWM

  TIM_OC3Init(TIM3, &TIM_OCInitStructure);   //使能通道3

  TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);

  /*

WM1 Mode configuration: Channel4 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR4_Val; //设置通道4的电平跳变值，输出另外一个占空比的PWM

  TIM_OC4Init(TIM3, &TIM_OCInitStructure);  //使能通道4

  TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);

  TIM_ARRPreloadConfig(TIM3, ENABLE);            // 使能TIM3重载寄存器ARR

  /* TIM3 enable counter */
  TIM_Cmd(TIM3, ENABLE);
}