同一个定时器可以在不同的通道输出不同频率的PWM吗

#include "stm32f10x.h"

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

TIM_OCInitTypeDef TIM_OCInitStructure;

uint16_t CCR1_Val = 250;

uint16_t CCR2_Val = 500;

uint16_t CCR3_Val = 750;

uint16_t CCR4_Val = 0;

uint16_t PrescalerValue = 0;



voidRCC_Configuration(void);                //时钟配置

voidGPIO_Configuration(void);            //管脚配置

void Delay (__IO uint32_tnCount);         //延时函数



int main(void)

{



RCC_Configuration();

GPIO_Configuration();

PrescalerValue = (uint16_t) (SystemCoreClock /24000000) - 1;

TIM_TimeBaseStructure.TIM_Period =1000;                                 //周期

TIM_TimeBaseStructure.TIM_Prescaler =PrescalerValue;             //分频

TIM_TimeBaseStructure.TIM_ClockDivision =0;                            //时钟分割

TIM_TimeBaseStructure.TIM_CounterMode =TIM_CounterMode_Up;

               //计数模式

TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);                  //初始TIM3



/*************************** 通道1 ********************************/

TIM_OCInitStructure.TIM_OCMode =TIM_OCMode_PWM2;    //PWM2

TIM_OCInitStructure.TIM_OutputState =TIM_OutputState_Enable;   //PWM功能使能

TIM_OCInitStructure.TIM_Pulse =CCR1_Val;                           //写比较值(占空比

TIM_OCInitStructure.TIM_OCPolarity =TIM_OCPolarity_Low;   //置高

TIM_OC1Init(TIM3, &TIM_OCInitStructure);

TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);



/****************************** 通道2 ******************************/

/* PWM1 Mode configuration: Channel2 */

TIM_OCInitStructure.TIM_OutputState =TIM_OutputState_Enable;

TIM_OCInitStructure.TIM_Pulse = CCR2_Val;

TIM_OCInitStructure.TIM_OCPolarity =TIM_OCPolarity_High;

TIM_OC2Init(TIM3, &TIM_OCInitStructure);

TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);



/******************************* 通道3 *********************************/

/* PWM1 Mode configuration: Channel3 */

TIM_OCInitStructure.TIM_OutputState =TIM_OutputState_Enable;

TIM_OCInitStructure.TIM_Pulse = CCR3_Val;

TIM_OC3Init(TIM3, &TIM_OCInitStructure);

TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);



/****************************** 通道4 *********************************/

/* PWM1 Mode configuration: Channel4 */

TIM_OCInitStructure.TIM_OutputState =TIM_OutputState_Enable;

TIM_OCInitStructure.TIM_Pulse = CCR4_Val;

TIM_OC4Init(TIM3, &TIM_OCInitStructure);

TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);

TIM_ARRPreloadConfig(TIM3,ENABLE);                       //

TIM_Cmd(TIM3,ENABLE);                                         //使能计数

while (1)

{

CCR4_Val++;

if(CCR4_Val==1000)CCR4_Val=0;

TIM_SetCompare4(TIM3,CCR4_Val);                        //占空比调节