STM8 TIM1-PWM 死活不输出

只看该作者 · 2010-11-15 11:20

void main ( void )
{
  _asm("rim");

  PC_DDR |= 0x0E;             /* Output.                */
PC_CR1 |= 0x0E;             /* PushPull.             */
PC_CR2  = 0x0E;             /* Output speed up to 10MHz. */


  TIM1_ARRH = 0x10;       //输出脉冲周期16MHz/65535
TIM1_ARRL = 0x00;          // 输出脉冲周期16MHz/65535
TIM1_CCR1H = 0x07;          // 输出脉宽
TIM1_CCR1L = 0xff;          // 输出脉宽
TIM1_CCMR1 |= 0x60;          // PC1脚PWM输出,PWM模式1
TIM1_CCER1 |= 0x01;       // CH1/CH2/ 关闭互补输出;高电平有效输出高;
TIM1_IER = 0x03;          // 允许产生更新事件中断
TIM1_CR1 = 0x01;          //启动计数器
while ( 1 );
}

更新中断和比较中断都有参数,就是PWM死活不输出,我对他的数据手册反反复复看,也做了各种设置方式, 就是不在PC1脚上输出;

只看该作者 · 2010-11-15 11:21

更新中断和比较中断都有产生; 就是PC1脚不输出PWM电压

只看该作者 · 2010-11-15 11:22

你的程序有问题，下面的程序是我自己写的，给你作参考：
/*
**-----------------------------------------------------------------------------
**
**  Abstract:
** TIM1初始化, 更新时间为40uS(PWM输出周期/25MHz)
**
**  Parameters:
** None
**
**  Returns:
** None
**
**-----------------------------------------------------------------------------
*/
void TIM1_Init(void)
{
CLK_PCKENR1 |= 0x80;                      //开启定时器1外设时钟

TIM1_EGR |= 0x01;                         //重新初始化TIM1

TIM1_ARRH = (UCHAR)(TIM1_Period >> 8);    //设定重装载值
TIM1_ARRL = (UCHAR)(TIM1_Period);

TIM1_PSCRH = 0x00;                      //设定预分频为1 = 16M
TIM1_PSCRL = 0x00;

TIM1_CR1 = 0x00;                         //边沿对齐,向上计数
TIM1_RCR = 0x00;
}

/*
**-----------------------------------------------------------------------------
**
**  Abstract:
** TIM1_CC2 PWM输出初始化
**
**  Parameters:
** None
**
**  Returns:
** None
**
**-----------------------------------------------------------------------------
*/
void TIM1_OC2Init(void)
{
TIM1_CCER1 = 0x30;                         //CC2E开启,高电平有效
TIM1_CCMR2 = 0x70;                         //PWM模式1,CC1配置入输出
TIM1_OISR &= ~0x03;
TIM1_CCR2H = (UCHAR)(TIM1_Pulse >> 8);
TIM1_CCR2L = (UCHAR)(TIM1_Pulse);
}

/*
**-----------------------------------------------------------------------------
**
**  Abstract:
** TIM1使能或禁止
**
**  Parameters:
** None
**
**  Returns:
** None
**
**-----------------------------------------------------------------------------
*/
void TIM1_Cmd(FunctionalState NewState)
{
if(NewState != DISABLE)
{
TIM1_CR1 |= 0x01;                         //使能计数器
}
else
{
TIM1_CR1 &= ~0x01;                      //禁止计数器
}
}

/*
**-----------------------------------------------------------------------------
**
**  Abstract:
** TIM1_CC2 PWM输出控制
**
**  Parameters:
** None
**
**  Returns:
** None
**
**-----------------------------------------------------------------------------
*/
void  TIM1_CtrlPWMOutPuts(FunctionalState NewState)
{
if(NewState != DISABLE)
{
TIM1_BKR |= 0x80;
}
else
{
TIM1_BKR &= ~0x80;
}
}

只看该作者 · 2010-11-15 11:39

谢谢 jgphu 万分感谢!

就差TIM1_BKR没有设置;

只看该作者 · 2015-1-7 17:37

你这是固件函数库的吗

只看该作者 · 2015-6-16 20:52

void tim1_pwm1 (void)
{
/*定时器系统时钟为20us*/
   TIM1_PSCRH =0X01;
TIM1_PSCRL =0X40;
/* 输出20ms的方波，频率50hz*/
TIM1_ARRH = 0X03;
TIM1_ARRL = 0XE8;
/*输出占空比为8.1%的方波*/
TIM1_CCR1H =  pwm_1[tim_c1];
tim_c1 ++;
TIM1_CCR1L = pwm_1[tim_c1];
tim_c1 ++;
TIM1_CCMR1 = 0X60;
TIM1_CCER1 = 0X01;

TIM1_OISR =  0X00;
TIM1_CR1=0X01;//开始计数
TIM1_BKR=0X80;//

STM8 TIM1-PWM 死活不输出

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