STM32 TIM1輸出互補波形

#include "stm32f10x.h"
/** @addtogroup STM32F10x_StdPeriph_Examples
  * @{
  */
/** @addtogroup TIM_7PWM_Output
  * @{
  */
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;
uint16_t TimerPeriod = 0;
uint16_t Channel1Pulse = 0, Channel2Pulse = 0, Channel3Pulse = 0, Channel4Pulse = 0;
/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
/* Private functions ---------------------------------------------------------*/
/**
  * @brief   Main program
  * @param  None
  * @retval None
  */
int main(void)
{
  /*!< At this stage the microcontroller clock setting is already configured,
       this is done through SystemInit() function which is called from startup
       file (startup_stm32f10x_xx.s) before to branch to application main.
       To reconfigure the default setting of SystemInit() function, refer to
       system_stm32f10x.c file
     */    
      
  /* System Clocks Configuration */
  RCC_Configuration();
  /* GPIO Configuration */
  GPIO_Configuration();
  /* TIM1 Configuration ---------------------------------------------------
   Generate 7 PWM signals with 4 different duty cycles:
   TIM1CLK = SystemCoreClock, Prescaler = 0, TIM1 counter clock = SystemCoreClock
   SystemCoreClock is set to 72 MHz for Low-density, Medium-density, High-density
   and Connectivity line devices and to 24 MHz for Low-Density Value line and
   Medium-Density Value line devices
  
   The objective is to generate 7 PWM signal at 17.57 KHz:
     - TIM1_Period = (SystemCoreClock / 17570) - 1
   The channel 1 and channel 1N duty cycle is set to 50%
   The channel 2 and channel 2N duty cycle is set to 37.5%
   The channel 3 and channel 3N duty cycle is set to 25%
   The channel 4 duty cycle is set to 12.5%
   The Timer pulse is calculated as follows:
     - ChannelxPulse = DutyCycle * (TIM1_Period - 1) / 100
  ----------------------------------------------------------------------- */
  /* Compute the value to be set in ARR regiter to generate signal frequency at 17.57 Khz */
  TimerPeriod = (SystemCoreClock / 17570 ) - 1;
  /* Compute CCR1 value to generate a duty cycle at 50% for channel 1 and 1N */
  Channel1Pulse = (uint16_t) (((uint32_t) 5 * (TimerPeriod - 1)) / 10);
  /* Compute CCR2 value to generate a duty cycle at 37.5%  for channel 2 and 2N */
  Channel2Pulse = (uint16_t) (((uint32_t) 375 * (TimerPeriod - 1)) / 1000);
  /* Compute CCR3 value to generate a duty cycle at 25%  for channel 3 and 3N */
  Channel3Pulse = (uint16_t) (((uint32_t) 25 * (TimerPeriod - 1)) / 100);
  /* Compute CCR4 value to generate a duty cycle at 12.5%  for channel 4 */
  Channel4Pulse = (uint16_t) (((uint32_t) 125 * (TimerPeriod- 1)) / 1000);
/*   計算週期 時間的方法 
  TIM_TimeBaseStructure.TIM_Prescaler = 0; //設置用來作爲TIM 時鐘頻率除數的預分頻值
  那麼TIM時鐘就爲72M  1/72MHZ=0.01388...us    這就是 系統時間
 
  TimerPeriod = (SystemCoreClock / 17570 ) - 1;   //計算中斷週期值
 
  (72MHz/17570) -1=4096.89..   中斷週期值
   4096.89*0.01388=56.8US  這就是實際PWM中斷週期時間 
  
   1/56.8US=17.6KHZ   1除以除以週期時間 就是頻率 大約17.6KHz左右。
   各個 通道值計算結果。。
  Channel1Pulse = 5*（4096-1）/10 =2047       2047*0.01388=28.4US
  Channel2Pulse =  375 *(4096 - 1)) / 1000=1535  1535*0.01388=21.3US
  Channel3Pulse =  25 * (4096 - 1)) / 100=1023   1023*0.01388=14.19US
  Channel4Pulse =  125 *(4096 - 1)) / 1000=511   511*0.01388=7.09US
 
*/
  // //定時器初始化 函數  見庫函數 P246頁
  /* Time Base configuration */
  TIM_TimeBaseStructure.TIM_Prescaler = 0;  //設置用來作爲TIM 時鐘頻率除數的預分頻值
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //計數器模式  /* 向上計數模式 */
  TIM_TimeBaseStructure.TIM_Period = TimerPeriod; 
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;   //時鐘分割  /* 採樣分頻 */
  TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; //設置 週期 計數值
  TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
  //TIM1 配置  見 庫函數 P294 頁
  /* Channel 1, 2,3 and 4 Configuration in PWM mode */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;    //脈衝寬度調製模式2
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;  //使能輸出比較狀態
  TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; //使能  互補 輸出狀態
  TIM_OCInitStructure.TIM_Pulse = Channel1Pulse;  //脈衝 值
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //輸出比較極性低
  TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low;//互補 輸出極性高
  TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;   //MOE=0 設置 TIM1輸出比較空閒狀態
  TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;//MOE=0 重置 TIM1輸出比較空閒狀態
  TIM_OC1Init(TIM1, &TIM_OCInitStructure); //設定好的參數 初始化TIM 
  TIM_OCInitStructure.TIM_Pulse = Channel2Pulse; //脈寬值
  TIM_OC2Init(TIM1, &TIM_OCInitStructure); //設定好的參數 初始化TIM 
  TIM_OCInitStructure.TIM_Pulse = Channel3Pulse; //脈寬值
  TIM_OC3Init(TIM1, &TIM_OCInitStructure); //設定好的參數 初始化TIM 
  TIM_OCInitStructure.TIM_Pulse = Channel4Pulse; //脈寬值
  TIM_OC4Init(TIM1, &TIM_OCInitStructure);//設定好的參數 初始化TIM 
  /* TIM1 counter enable */
  TIM_Cmd(TIM1, ENABLE); //使能 TIM1
  /* TIM1 Main Output Enable */
  TIM_CtrlPWMOutputs(TIM1, ENABLE);    //使能 TIM1 輸出
  while (1)
  {}
}
/**
  * @brief  Configures the different system clocks.
  * @param  None
  * @retval None
  */
void RCC_Configuration(void)
{
  /* TIM1, GPIOA, GPIOB, GPIOE and AFIO clocks enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOE|
                         RCC_APB2Periph_GPIOB |RCC_APB2Periph_AFIO, ENABLE);
}
/**
  * @brief  Configure the TIM1 Pins.
  * @param  None
  * @retval None
  */
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
#ifdef STM32F10X_CL
  /* GPIOE Configuration: Channel 1/1N, 2/2N, 3/3N and 4 as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9|GPIO_Pin_11|GPIO_Pin_13|GPIO_Pin_14|
                                GPIO_Pin_8|GPIO_Pin_10|GPIO_Pin_12;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOE, &GPIO_InitStructure);
  /* TIM1 Full remapping pins */
  GPIO_PinRemapConfig(GPIO_FullRemap_TIM1, ENABLE);
#else
  /* GPIOA Configuration: Channel 1, 2 and 3 as alternate function push-pull */
  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);
  /* GPIOB Configuration: Channel 1N, 2N and 3N as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
#endif
}
#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t* file, uint32_t line)
{
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  while (1)
  {}
}
#endif
/**
  * @}
  */
/**
  * @}
  */
/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/