main.c
+ [3 d. I) x0 Z8 J9 K% H        MX_TIM2_Init(200,1000);
1 f2 r! A' X5 R$ H$ B/ r# u        HAL_TIM_PWM_Start(&htim2,TIM_CHANNEL_1);//必不可少；
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# f! M) [1 k: S! ]; J$ I# f
tim.c
# Z) P7 R& M) P# w6 u0 h/ a8 q/* TIM2 init function */
void MX_TIM2_Init(int pulse,int period)
{
2 n; m, a& j! W. b' A  TIM_MasterConfigTypeDef sMasterConfig;
! Z( R2 k) K* r& H3 Z  TIM_OC_InitTypeDef sConfigOC;

6 c. d, y$ A2 @) ~  htim2.Instance = TIM2;
  htim2.Init.Prescaler = 0;
- r, s- k; P0 w* B) w3 K+ q% a3 O  htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim2.Init.Period = period;
  htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  if (HAL_TIM_PWM_Init(&htim2) != HAL_OK)
  {
' a' i+ K3 p8 O, @    Error_Handler();
. t  T6 Y3 y4 I% P9 c& p5 i$ V  }

  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
5 N! D8 ^) ^& [/ |3 B1 O! w  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
+ n* _+ [+ E" I$ n* q  if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
9 Z5 u- d$ |" T' _- Z; q6 k  {
; h( Y" |- `! N% @$ Y* ]5 P    Error_Handler();
  }
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. e& c4 Y* U  f' C( f. o- q# P  sConfigOC.OCMode = TIM_OCMODE_PWM1;
" B$ K" U) b$ j& Q' _7 F  sConfigOC.Pulse = pulse;
0 Q8 v% ~7 P$ [! \+ @. o) z5 y5 o  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
! d" ^3 V1 Z1 F8 {5 L  if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
* r: L4 J4 s  u' R# [, Z7 n7 R  H7 M. f  {
    Error_Handler();
4 P# r$ s) m, u( j3 {6 |6 G  }
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. {' I2 I3 d% `0 ]. i  HAL_TIM_MspPostInit(&htim2);

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