STM32F0 PWM问题！！

只看该作者 · 2017-11-30 17:26

本帖最后由小S咯于 2017-11-30 17:35 编辑

我用的是STM32F030K6T6芯片，我配置TIM1的3通道和TIM3的4通道PWM输出，为什么示波器看一直是高电平，没有PWM输出。另外有这个芯片的数据手册吗？？？网上找不到，下面程序。还有一个问题：因为定时器PWM不行，所以我就想IO口模拟PWM，于是开TIM3的中断，结果flash写会卡死，单独使用就没问题。
程序：
void fmc_write(uint32_t addr, uint16_t Data)
{
  FLASH_Unlock();
  FLASH_ErasePage(FLASH_START_ADDR+(addr*2));
  FLASH_ProgramHalfWord(FLASH_START_ADDR+(addr*2),Data);
  FLASH_Lock();
}

//GPIO初始化的
void gpio_init()
{
GPIO_InitTypeDef GPIO_InitStructure1; //PA
GPIO_InitTypeDef GPIO_InitStructure2; //PB
/* GPIOA Periph clock enable */
//PA9=P,PA10=Y,PA11=R    PWM
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
GPIO_InitStructure1.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;
GPIO_InitStructure1.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure1.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure1.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure1.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStructure1);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_2);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_2);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource11,GPIO_AF_2);

/* GPIOB Periph clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
//PB0=G,PB1=B,PB4=A,PB5=W    PWM
GPIO_InitStructure2.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_4 | GPIO_Pin_5;
GPIO_InitStructure2.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure2.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure2.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure2.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOB, &GPIO_InitStructure2);
GPIO_PinAFConfig(GPIOB,GPIO_PinSource0,GPIO_AF_1);
GPIO_PinAFConfig(GPIOB,GPIO_PinSource1,GPIO_AF_1);
GPIO_PinAFConfig(GPIOB,GPIO_PinSource4,GPIO_AF_1);
GPIO_PinAFConfig(GPIOB,GPIO_PinSource5,GPIO_AF_1);

}

//定时器初始化
void PWM_init()
{
  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure1;
  TIM_OCInitTypeDef TIM_OCInitStructure1;

  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure3;
  TIM_OCInitTypeDef TIM_OCInitStructure3;

  //TIM1
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

  TIM_TimeBaseStructure1.TIM_Prescaler = 0;
  TIM_TimeBaseStructure1.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseStructure1.TIM_Period = 255;
  TIM_TimeBaseStructure1.TIM_ClockDivision = 0;
  TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure1);

  TIM_OCInitStructure1.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure1.TIM_OutputState = TIM_OutputNState_Enable;
  TIM_OCInitStructure1.TIM_OCPolarity = TIM_OCPolarity_High;
  //CH1~CH4
//  TIM_SetCompare1(TIM1,64);
// TIM_OC1Init(TIM1,&TIM_OCInitStructure1);
// TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Enable);

  TIM_SetCompare2(TIM1,128);
  TIM_OC2Init(TIM1,&TIM_OCInitStructure1);
  TIM_OC2PreloadConfig(TIM1,TIM_OCPreload_Enable);

  TIM_SetCompare3(TIM1,200);
  TIM_OC3Init(TIM1,&TIM_OCInitStructure1);
  TIM_OC3PreloadConfig(TIM1,TIM_OCPreload_Enable);

  TIM_SetCompare1(TIM1,255);
  TIM_OC4Init(TIM1,&TIM_OCInitStructure1);
  TIM_OC4PreloadConfig(TIM1,TIM_OCPreload_Enable);

  TIM_Cmd(TIM1,ENABLE);
  TIM_CtrlPWMOutputs(TIM1,ENABLE);

  //TIM3
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

  TIM_TimeBaseStructure3.TIM_Prescaler = 0;
  TIM_TimeBaseStructure3.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseStructure3.TIM_Period = 16;
  TIM_TimeBaseStructure3.TIM_ClockDivision = 0;
  TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure3);
  TIM_ClearFlag(TIM3, TIM_FLAG_Update);
  TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);

  TIM_OCInitStructure3.TIM_OCMode = TIM_OCMode_PWM2;
  TIM_OCInitStructure3.TIM_OutputState = TIM_OutputNState_Enable;
  TIM_OCInitStructure3.TIM_OCPolarity = TIM_OCPolarity_High;
  //CH1~CH4
  TIM_SetCompare1(TIM3,6550);
  TIM_OC1Init(TIM3,&TIM_OCInitStructure3);
  TIM_OC1PreloadConfig(TIM3,TIM_OCPreload_Enable);

  TIM_SetCompare1(TIM3,13000);
  TIM_OC2Init(TIM3,&TIM_OCInitStructure3);
  TIM_OC2PreloadConfig(TIM3,TIM_OCPreload_Enable);

  TIM_SetCompare1(TIM3,33000);
  TIM_OC3Init(TIM3,&TIM_OCInitStructure3);
  TIM_OC3PreloadConfig(TIM3,TIM_OCPreload_Enable);

  TIM_SetCompare1(TIM3,45000);
  TIM_OC4Init(TIM3,&TIM_OCInitStructure3);
  TIM_OC4PreloadConfig(TIM3,TIM_OCPreload_Enable);

  TIM_Cmd(TIM3,ENABLE);
  TIM_CtrlPWMOutputs(TIM3,ENABLE);
}