如何用STM8的TIM1输出3路PWM

如何用STM8的TIM1输出3路PWM 手头上有一块stm8s-discovery开发板，芯片是STM8S105，如何配置才能让TIM1的OC1、OC2、OC3分别输出占空比是25%、50%、75%的PWM方波？ //用固件库方便些 #include "stm8s_lib.h" #define CCR1_Val  ((u16)2047) #define CCR2_Val  ((u16)1535) #define CCR3_Val  ((u16)1023) #define CCR4_Val  ((u16)511)  void main(void) {   /* TIM1 Peripheral Configuration */   TIM1_DeInit();   /* Time Base configuration */  /*   TIM1_Period = 4095   TIM1_Prescaler = 0   TIM1_CounterMode = TIM1_COUNTERMODE_UP   TIM1_RepetitionCounter = 0  */   TIM1_TimeBaseInit(0, TIM1_COUNTERMODE_UP, 4095, 0);   /* Channel 1, 2,3 and 4 Configuration in PWM mode */    /*  TIM1_OCMode = TIM1_OCMODE_PWM2   TIM1_OutputState = TIM1_OUTPUTSTATE_ENABLE   TIM1_OutputNState = TIM1_OUTPUTNSTATE_ENABLE  TIM1_Pulse = CCR1_Val   TIM1_OCPolarity = TIM1_OCPOLARITY_LOW   TIM1_OCNPolarity = TIM1_OCNPOLARITY_HIGH   TIM1_OCIdleState = TIM1_OCIDLESTATE_SET   TIM1_OCNIdleState = TIM1_OCIDLESTATE_RESET    */   TIM1_OC1Init(TIM1_OCMODE_PWM2, TIM1_OUTPUTSTATE_ENABLE, TIM1_OUTPUTNSTATE_ENABLE, CCR1_Val, TIM1_OCPOLARITY_LOW, TIM1_OCNPOLARITY_HIGH, TIM1_OCIDLESTATE_SET, TIM1_OCIDLESTATE_RESET);   /*TIM1_Pulse = CCR2_Val*/   TIM1_OC2Init(TIM1_OCMODE_PWM2, TIM1_OUTPUTSTATE_ENABLE, TIM1_OUTPUTNSTATE_ENABLE, CCR2_Val, TIM1_OCPOLARITY_LOW, TIM1_OCNPOLARITY_HIGH, TIM1_OCIDLESTATE_SET, TIM1_OCIDLESTATE_RESET);   /*TIM1_Pulse = CCR3_Val*/   TIM1_OC3Init(TIM1_OCMODE_PWM2, TIM1_OUTPUTSTATE_ENABLE, TIM1_OUTPUTNSTATE_ENABLE, CCR3_Val, TIM1_OCPOLARITY_LOW, TIM1_OCNPOLARITY_HIGH, TIM1_OCIDLESTATE_SET, TIM1_OCIDLESTATE_RESET);   /*TIM1_Pulse = CCR4_Val*/ //  TIM1_OC4Init(TIM1_OCMODE_PWM2, TIM1_OUTPUTSTATE_ENABLE, CCR4_Val, TIM1_OCPOLARITY_LOW, TIM1_OCIDLESTATE_SET);    //GPIO_Init(GPIOD,GPIO_PIN_7,GPIO_MODE_OUT_PP_LOW_FAST);  //OPT_Init1.OPT2=(OPT_Init1.OPT2|0x10);   /* TIM1 counter enable */   TIM1_Cmd(ENABLE);   /* TIM1 Main Output Enable */   TIM1_CtrlPWMOutputs(ENABLE);     while (1)   {   }    } #ifdef FULL_ASSERT void assert_failed(u8 *file, u16 line) #else void assert_failed(void) #endif {   /* Add your own code to manage an assert error */   /* Infinite loop */   while (1)   {   } }   //不用固件库直接操作我只试过 TIM2 TIM3 不过TIM1应该差不多，你自己参考，我只知道这么多了，莫追问 void TIM2_init(void)     //TIM2 CH1 工作于模式1   {     TIM2_CCMR1= 0x60;      // PWM 模式 1,TIM2 CH1    TIM2_CCER1= 0x03;      // CC1配置为输出   TIM2_CCER2= 0x03;    // CC3使能    TIM2_ARRH = 0x03;      // 配置PWM分辨率为10位，ARR=0x3FF    TIM2_ARRL = 0xFF;      // PWM频率=8M/0x03FF=7820Hz    TIM2_CR1 |= 0x01;      // 计数器使能，开始计数   } void Run(void)   {    TIM2_CCR1=value;   TIM2_CCR3=value;   TIM3_CCR2=value;   TIM3_CCR1=value;        //注意每个通道都要设CCR   } //另一种编程方法 #include "STM8S105C_S.h" #ifndef BIT #define BIT(n)    (1<<(n)) //n数值左移1位 #endif void PWM_OC1_25_OC2_50_OC3_75(void) {  TIM1_CR1 &= ~BIT(0);  //关闭TIM1 禁止计数器  TIM1_PSCRH = 0;  //预分频高8位  TIM1_PSCRL = 0;    //不分频(预分频低8位)  TIM1_ARRH = 0; //自动重装载寄存器高8位  TIM1_ARRL = 99;    TIM1_CCR1H = 0; //捕获/比较寄存器1高位  TIM1_CCR1L = 25;   //占空比25%（25/(99+1)）  TIM1_CCMR1= 0x60;   //PWM模式1(捕获/比较模式寄存器) 向上计数时 TIM1_CNTTIM1_CCR1时通道1为无效电平  TIM1_CCER1 |= BIT(0); //使能OC1(捕获/比较使能寄存器)    TIM1_CCR2H = 0;  TIM1_CCR2L = 50;   //占空比50%（50/(99+1)）  TIM1_CCMR2 = 0x60;  //PWM模式1  TIM1_CCER1 |= BIT(4); //使能OC2    TIM1_CCR3H = 0;  TIM1_CCR3L = 75;   //占空比75%（75/(99+1)）  TIM1_CCMR3 = 0x60;  //PWM模式1  TIM1_CCER2 |= BIT(0); //使能OC3    TIM1_CR1 |= BIT(0);    //使能TIM1  TIM1_BKR |= BIT(7);    //禁止刹车 }