STM32F103CT86用4个定时器输出4路不同频率及占空比的PWM代码

好的，以下是一个简单的示例代码，该代码使用4个定时器输出4路不同频率和占空比的PWM信号。请注意，此示例代码仅供参考，您需要根据自己的具体需求进行修改和优化。

#include "stm32f10x.h"

void TIM1_PWM_Init(uint16_t arr, uint16_t psc);
void TIM2_PWM_Init(uint16_t arr, uint16_t psc);
void TIM3_PWM_Init(uint16_t arr, uint16_t psc);
void TIM4_PWM_Init(uint16_t arr, uint16_t psc);

void GPIO_Configuration(void);

int main(void)
{
  GPIO_Configuration();

  TIM1_PWM_Init(719, 0); // 100Hz
  TIM2_PWM_Init(1439, 0); // 50Hz
  TIM3_PWM_Init(3599, 0); // 20Hz
  TIM4_PWM_Init(7199, 0); // 10Hz

  while(1);

}

void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
}

void TIM1_PWM_Init(uint16_t arr, uint16_t psc)
{
  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
  TIM_OCInitTypeDef TIM_OCInitStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

  TIM_TimeBaseStructure.TIM_Period = arr;
  TIM_TimeBaseStructure.TIM_Prescaler = psc;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = arr/2; // 50% duty cycle
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OC1Init(TIM1, &TIM_OCInitStructure);
  TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);

  TIM_Cmd(TIM1, ENABLE);
}

void TIM2_PWM_Init(uint16_t arr, uint16_t psc)
{
  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
  TIM_OCInitTypeDef TIM_OCInitStructure;

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

  TIM_TimeBaseStructure.TIM_Period = arr;
  TIM_TimeBaseStructure.TIM_Prescaler = psc;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = arr/2; // 50% duty cycle
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OC1Init(TIM2, &TIM_OCInitStructure);
  TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable);

  TIM_Cmd(TIM2, ENABLE);
}

void TIM3_PWM_Init(uint16_t arr, uint16_t psc)
{
  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
  TIM_OCInitTypeDef TIM_OCInitStructure;

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

  TIM_TimeBaseStructure.TIM_Period = arr;
  TIM_TimeBaseStructure.TIM_Prescaler = psc;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = arr/2; // 50% duty cycle
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OC1Init(TIM3, &TIM_OCInitStructure);
  TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);

  TIM_Cmd(TIM3, ENABLE);
}

void TIM4_PWM_Init(uint16_t arr, uint16_t psc)
{
  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
  TIM_OCInitTypeDef TIM_OCInitStructure;

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);

  TIM_TimeBaseStructure.TIM_Period = arr;
  TIM_TimeBaseStructure.TIM_Prescaler = psc;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);

  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = arr/2; // 50% duty cycle
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OC1Init(TIM4, &TIM_OCInitStructure);
  TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable);

  TIM_Cmd(TIM4, ENABLE);
}

在这个示例代码中，我们使用了GPIOA的引脚8、9、10和11作为PWM输出引脚。我们初始化了4个定时器TIM1、TIM2、TIM3和TIM4，每个定时器都输出一个50%的占空比的PWM信号，但它们的频率是不同的。TIM1的PWM信号频率为100Hz，TIM2的频率为50Hz，TIM3的频率为20Hz，TIM4的频率为10Hz。您可以根据需要修改这些值来获取所需的PWM信号频率和占空比。

请注意，由于TIM1是高级定时器，因此我们需要使用RCC_APB2PeriphClockCmd函数来使能其时钟。而TIM2、TIM3和TIM4都是低级定时器，因此我们需要使用RCC_APB1PeriphClockCmd函数来使能它们的时钟。

希望这个示例代码能帮助您开始实现您的PWM输出需求。