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代码
//------
//main.c
//------
#include "STM32Lib\\stm32f10x.h"
u8 const pwm_duty[]={
0x80,0x83,0x86,0x89,0x8c,0x8f,0x92,0x95,0x98,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae,
0xb0,0xb3,0xb6,0xb9,0xbc,0xbf,0xc1,0xc4,0xc7,0xc9,0xcc,0xce,0xd1,0xd3,0xd5,0xd8,
0xda,0xdc,0xde,0xe0,0xe2,0xe4,0xe6,0xe8,0xea,0xec,0xed,0xef,0xf0,0xf2,0xf3,0xf5,
0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfc,0xfd,0xfe,0xfe,0xff,0xff,0xff,0xff,0xff,
0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfe,0xfd,0xfc,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,
0xf6,0xf5,0xf3,0xf2,0xf0,0xef,0xed,0xec,0xea,0xe8,0xe6,0xe4,0xe2,0xe0,0xde,0xdc,
0xda,0xd8,0xd5,0xd3,0xd1,0xce,0xcc,0xc9,0xc7,0xc4,0xc1,0xbf,0xbc,0xb9,0xb6,0xb3,
0xb0,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x98,0x95,0x92,0x8f,0x8c,0x89,0x86,0x83,
0x80,0x7c,0x79,0x76,0x73,0x70,0x6d,0x6a,0x67,0x63,0x60,0x5d,0x5a,0x57,0x54,0x51,
0x4f,0x4c,0x49,0x46,0x43,0x40,0x3e,0x3b,0x38,0x36,0x33,0x31,0x2e,0x2c,0x2a,0x27,
0x25,0x23,0x21,0x1f,0x1d,0x1b,0x19,0x17,0x15,0x13,0x12,0x10,0x0f,0x0d,0x0c,0x0a,
0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x03,0x02,0x01,0x01,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x02,0x03,0x03,0x04,0x05,0x06,0x07,0x08,
0x09,0x0a,0x0c,0x0d,0x0f,0x10,0x12,0x13,0x15,0x17,0x19,0x1b,0x1d,0x1f,0x21,0x23,
0x25,0x27,0x2a,0x2c,0x2e,0x31,0x33,0x36,0x38,0x3b,0x3e,0x40,0x43,0x46,0x49,0x4c,
0x4f,0x51,0x54,0x57,0x5a,0x5d,0x60,0x63,0x67,0x6a,0x6d,0x70,0x73,0x76,0x79,0x7c};
int main(void)
{ 
 RCC_Configuration();
 GPIO_Configuration();
 Tim1_Configuration();
 NVIC_Configuration();
 for(;;)
 {
 }
}
//-------
//NVIC.C
//-------
#include "STM32Lib\\stm32f10x.h"
void NVIC_Configuration(void)
{
 NVIC_InitTypeDef NVIC_InitStructure;
 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
 NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
 NVIC_Init(&NVIC_InitStructure);
}
//-------
//GPIO.C
//-------
void GPIO_Configuration(void)
{ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
 GPIO_InitTypeDef GPIO_InitStructure;
 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10;
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //开漏输出
 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //50M时钟速度
 GPIO_Init(GPIOA, &GPIO_InitStructure);
}
//-------
//TIM.C
//------- 
#include "STM32Lib\\stm32f10x.h"
void Tim1_Configuration(void)
{
 TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
 TIM_OCInitTypeDef  TIM_OCInitStructure;
 RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);
 TIM_DeInit(TIM1);
 TIM_TimeBaseStructure.TIM_Prescaler = 10;
 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
 TIM_TimeBaseStructure.TIM_Period = 256; 
 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
 TIM_TimeBaseStructure.TIM_RepetitionCounter = 0x0;
 TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);
 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;
 TIM_OCInitStructure.TIM_Pulse = 1;
 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; 
 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
 TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset; 
 TIM_OC1Init(TIM1,&TIM_OCInitStructure);
 TIM_OC2Init(TIM1,&TIM_OCInitStructure);
 TIM_OC3Init(TIM1,&TIM_OCInitStructure);
 TIM1->CCR1=1;
  TIM1->CCR2=33;
 TIM1->CCR3=66;
 TIM1->CR2   &=~0x01;
  TIM_CtrlPWMOutputs(TIM1,ENABLE);
 TIM_Cmd(TIM1,ENABLE);

 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
 TIM_DeInit(TIM2);
 TIM_TimeBaseStructure.TIM_Prescaler = 20;
 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
 TIM_TimeBaseStructure.TIM_Period = 267; 
 TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV2;
 TIM_TimeBaseStructure.TIM_RepetitionCounter = 0x0;
 TIM_TimeBaseInit(TIM2,&TIM_TimeBaseStructure);
 TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
 TIM_ITConfig(TIM2,TIM_IT_Update, ENABLE);
 TIM_Cmd(TIM2,ENABLE);
}
//-------
//中断函数
//------
void TIM2_IRQHandler(void)
{
 static unsigned char i=0;
 static unsigned char j=85;
 static unsigned char k=170;
  if (TIM_GetITStatus(TIM2,TIM_IT_Update) != RESET)
   {
   TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
      TIM1->CCR1 =  pwm_duty[i];
      TIM1->CCR2 =pwm_duty[j];
      TIM1->CCR3 = pwm_duty[k];
      i++;
   j++;
   k++;
    }
   return;
}