STM8-2路ADC控制2个LED灯PWM调光问题？

zhangli-li 提问时间：2017-11-16 21:24 /

问答
是否解决:

学习用stm8做个2路ADC电位器调节2个LED灯pwm调光的程序，屏蔽程序里任何一路ADC另一路是可以调节LED光的，2路一起用就不能正常调光了

，请兄弟们帮忙看看是哪里出了问题呢？谢谢！

/*2个电位器分别PWM调节2个LED*/

#include<iostm8s103f3.h>

unsigned char x;
unsigned int ADCData;
unsigned int PWM1;
unsigned int PWM2;
void PORTInit()          //PWM输出端口设置
{
  PC_DDR_bit.DDR3 = 1;    //set out
  PC_CR1_bit.C13 = 1;    //推挽输出
  PC_CR2_bit.C23 = 0;    //输出速度

  PD_DDR_bit.DDR2 = 1;    //set out
  PD_CR1_bit.C12 = 1;    //PD_CR1 |= 0x0d;
  PD_CR2_bit.C22 = 0;
}

/*******************************************************************************
**函数名称：void TIM1_PWM_Init()
**功能描述：定时器1 PWM初始化
**入口参数：无
**输出：无
*******************************************************************************/
void TIM1_PWM_Init()
{
  TIM1_CR1_bit.CEN = 0;    //停止计数
  TIM1_BKR_bit.MOE = 1;
  TIM1_CCMR3_bit.OC3M = 7; //PWM2 MODEL
  TIM1_CCMR3_bit.OC3PE = 1;
  TIM1_CCER2_bit.CC3E = 1; //output enable
  TIM1_CCER2_bit.CC3P = 1; //OC1 hi
  TIM1_PSCRH =  0x00;       //16MHZ/
  TIM1_PSCRL =  0x00;
  TIM1_ARRH =  1000 / 256;
  TIM1_ARRL =  1000 % 256;
  TIM1_CCR3H = 0x00;          //50%
  TIM1_CCR3L  = 0x00;
  TIM1_CR1 = 0x01;
}

/*******************************************************************************
**函数名称：void TIM2_PWM_Init()
**功能描述：定时器2PWM初始化
**入口参数：无
**输出：无
*******************************************************************************/
void TIM2_PWM_Init()
{
  TIM2_CR1_bit.CEN = 0;    //禁能定时器2
  TIM2_CCMR3_bit.OC3M = 7; //定时器通道3 PWM模式 PWM2 MODEL
  TIM2_CCMR3_bit.OC3PE = 1; //输出比1预装载使能
  TIM2_CCER2_bit.CC3E = 1; //定时器2通道3设置为输出
  TIM2_CCER2_bit.CC3P = 1; //定时器2通道3为低电平为有效电平
  TIM2_PSCR_bit.PSC = 0;    //设置预分频
  TIM2_ARRH =  1000 / 256;
  TIM2_ARRL =  1000 % 256;
  TIM2_CCR3H = 0x00;       //50%
  TIM2_CCR3L  = 0x00;
  TIM2_CR1 = 0x01;
}

/*******************************************************************************
**函数名称：void ADC_Init()
**功能描述：初始化ADC
**入口参数：无
**输出：无
*******************************************************************************/
void ADC_Init()
{
  PC_DDR_bit.DDR4 = 0; //设置PC->4 为输入
  PC_CR1_bit.C14 = 0; //设置为悬空输入
  PC_CR2_bit.C24 = 0; //设置中断禁止

  PD_DDR_bit.DDR3 = 0; //设置PD->3 为输入
  PD_CR1_bit.C13 = 0; //设置为悬空输入
  PD_CR2_bit.C23 = 0; //设置中断禁止

  ADC_CR1_bit.SPSEL = 1; //fmaster / 3 = 16MHZ / 3 = 5.333MHZ
  ADC_CR2_bit.ALIGN = 1; //RIGHT ALIGN
  ADC_CR1_bit.ADON = 1;    //启动ADC
}

/*******************************************************************************
**函数名称：void ADC_Data_Read(unsigned int *AD_Value)
**功能描述：读取ADC完成一次模数转换结果
**入口参数：unsigned int *AD_Value
         *AD_Value ->读取ADC采样数据的指针
**输出：无
*******************************************************************************/
void ADC_Data_Read(unsigned int *AD_Value)
{
  ADC_CSR_bit.CH = x;    //选择通道
  ADC_CR1_bit.ADON = 1;    //启动ADC
  while(ADC_CSR_bit.EOC == 0);  //等待转换结束
  *AD_Value = ADC_DRH;       //先读取高8位
  *AD_Value = (unsigned int)((*AD_Value << 8) + ADC_DRL); //高8位与低8位相加，凑成16位数据
}

/* 主函数 */
int main(void)
{
  CLK_CKDIVR = 0x00;    //CPUDIV = 1 HSIDIV = 1  内部时钟 = 16Mhz
  PORTInit();
  TIM1_PWM_Init();
  TIM2_PWM_Init();
  ADC_Init();          //调用ADC初始化函数
  while(1)
  {
   x = 2;
   ADC_Data_Read(&ADCData);             //读取ADC的采样数值
   PWM1=ADCData;
   TIM1_CCR3H = PWM1 / 256;
   TIM1_CCR3L  = PWM1 % 256;

   x = 4;
   ADC_Data_Read(&ADCData);             //读取ADC的采样数值
   PWM2=ADCData;
   TIM2_CCR3H = PWM2 / 256;
   TIM2_CCR3L  = PWM2 % 256;
  }
}