GD32F130的PA6，PA7作PWM的问题

只看该作者 · 2014-8-29 14:34

程序设置如下
void PWM_Init(void)
{
      GPIO_InitTypeDef       GPIO_InitStructure;
      TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
      TIM_OCInitTypeDef       TIM_OCInitStructure;

      // TIM3参数设置
      RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);



      // 配置GPIO管脚参数设置
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
      GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
      GPIO_Init(GPIOA, &GPIO_InitStructure);

      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
      GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
      GPIO_Init(GPIOB, &GPIO_InitStructure);

      GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_1); // GPIO管脚复用设置
      GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_1);
      GPIO_PinAFConfig(GPIOB, GPIO_PinSource0, GPIO_AF_1);
      GPIO_PinAFConfig(GPIOB, GPIO_PinSource1, GPIO_AF_1);

      TIM_TimeBaseStructure.TIM_Period = 2250;                   //自动重装载值，取值必须在0x0000~0xFFFF之间
      TIM_TimeBaseStructure.TIM_Prescaler =0;                   //预分频值，取值必须在0x0000~0xFFFF之间，+1为分频系数
      TIM_TimeBaseStructure.TIM_ClockDivision = 0;                               //时钟分割
      TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;       //向上计数模式
      TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
      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_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;          //TIM脉冲宽度调制模式1
      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,取值必须在0x0000~0xFFFF之间，占空比101/1001
      TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;    //输出极性:TIM输出比较极性高
      TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;

      TIM_OC1Init(TIM3, &TIM_OCInitStructure);       //根据TIM_OCInitStruct中指定的参数初始化外设TIMx
      TIM_OC2Init(TIM3, &TIM_OCInitStructure);
      TIM_OC3Init(TIM3, &TIM_OCInitStructure);
      TIM_OC4Init(TIM3, &TIM_OCInitStructure);
      TIM_Cmd(TIM3, ENABLE);
      TIM_CtrlPWMOutputs(TIM3, ENABLE);

}
PB0，PB1的PWM输出没有问题，但是PA6，PA7却不行，是哪儿出了问题？

只看该作者 · 2014-8-29 20:55

是不是库里没有包含呢，你读寄存器看看