STM8S105 TIM1的CH3如何输出PWM，帮忙看一下程序是否有问题

liangxing6760 · 发表于 2017-3-20 10:03:27

void TIM1Init(void)
{

  //Set the Prescaler value
  TIM1_PSCRH = 0x00;
  TIM1_PSCRL = 0x03;

  TIM1_CR1 &= 0xEF;    //UP_CONTER
  //Set the Autoreload value
  TIM1_ARRH = 0x00;
  TIM1_ARRL = 0xC8;    //200

  TIM1_RCR = 0x00;

  TIM1_CCMR3 = 0x60;    //PWM MODE 3
  TIM1_CCER1 = 0x01;    // OPEN OC1

  TIM1_CCR3H = 0x00;
  TIM1_CCR3L = 0x64;       //占空比

  TIM1_OISR  |= 0x00; /* Idle state set  */

  TIM1_IER = 0x01; /* Enable TIM1 update interrupt. */
  TIM1_CR2 &=~0x01; /* disable Capture/Compare Preloaded Control. */

  /* Automatic Output enable, Break, dead time and lock configuration*/
  TIM1_BKR |= 0x48;
  //TIM1_BKR |= 0x40;
  TIM1_DTR = 0x04; /* Dead time (1s/16MHz)*2*4 = 500ns */
  TIM1_BKR |= 0x10; /* Break enable */
  TIM1_BKR |= 0x20; /* Break polarity High */
  TIM1_BKR |= 0x40; /* Automatic output enable */
  TIM1_BKR |= 0x01; /* LockLevel_1 */

  /* Main Output Enable */
  TIM1_BKR |= 0x80; /* Output enable */
  TIM1_BKR = 0x80;
  TIM1_EGR = 0x01;

  TIM1_CR1 = 0x01;

}

liangxing6760 · 发表于 2017-3-20 13:01:15

万能的主，请帮忙看看吧

waerdeng · 发表于 2017-4-10 18:10:22

可以尝试一下用库函数。或代码生成器。

操作系统 · 发表于 2017-4-10 18:21:05

本帖最后由操作系统于 2017-4-10 18:24 编辑

void TIM1Init(void)
{  TIM1_CR1 = 0x00; //暂时关闭定时器
  TIM1_PSCRH = 0x00;
  TIM1_PSCRL = 0x03; //分频
  TIM1_ARRH = 0x00;
  TIM1_ARRL = 0xC8;    // 重载值
  TIM1_RCR = 0x00;  // 重复功能
  TIM1_CCMR3 = 0x68;       //PWM模式
  TIM1_CCER2 = 0x10;       //使能通道3
  TIM1_CCR3H = 0x00;
  TIM1_CCR3L = 0x64;          //占空比
  TIM1_BKR = 0x80;  //松开刹车
  TIM1_EGR = 0x01; //更新寄存器
  TIM1_CR1 = 0x81; //启动定时器

}
试试这个