设置Timer3 中断

1. void TIM3_INT_Config(void)
   / g' ~2 n$ s1 H/ W
2. {
   
3.    NVIC_InitTypeDef NVIC_InitStructure;
   
4. 
   
5.   /* TIM3 clock enable */
   & i& k$ M( V: R$ l
6.   RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
   
7. 
   
8.   /*  TIM3 ÖжÏǶÌ×Éè¼Æ*/
   9 ]6 r9 ?. C" T% _
9.   NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
   
10.   NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
    1 ]# q" L/ j8 E& ]! {: X
11.   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    
12.   NVIC_Init(&NVIC_InitStructure);
    
13. }

复制代码

& l. g- i" z! O+ b$ ?+ S  H
设置Timer3 模式

! n# R8 X. }& d* Z: y7 b2 w+ e

1. void TIM3_OUT_Config(void)
   2 [/ o+ e; h) j
2. {   
   
3.     TIM_TimeBaseInitTypeDef  TIM3_TimeBaseStructure;
   
4.     TIM_OCInitTypeDef  TIM3_OCInitStructure;   
   
5.   /* ¼ÆËãÔ¤·ÖƵֵ */
   6 V: j" O  I+ {, d7 D+ B
6.   TM3_PrescalerValue = (uint16_t) (SystemCoreClock  / TM3_PRESCALER) - 1;
   
7. 
   
8.   /* Time ¶¨Ê±Æ÷»ù´¡ÉèÖà */
   
9.   TIM3_TimeBaseStructure.TIM_Period = 65535;
   
10.   TIM3_TimeBaseStructure.TIM_Prescaler = 0;
    7 u3 F/ Q  O+ B
11.   TIM3_TimeBaseStructure.TIM_ClockDivision = 0;
    4 X. w( Q$ C% G. P2 Y
12.   TIM3_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    
13. 
    
14.   TIM_TimeBaseInit(TIM3, &TIM3_TimeBaseStructure);
    8 Y  y; H( l9 c4 u
15. 
    8 i8 p6 I7 _1 R
16.   /* Ô¤·ÖƵÆ÷ÅäÖà */
    2 ?4 \( V$ H, ]1 E2 ~
17.   TIM_PrescalerConfig(TIM3, TM3_PrescalerValue, TIM_PSCReloadMode_Immediate);
    6 c$ E2 B9 j, K, H4 Q* I+ O
18. 
    0 e, L2 y7 _$ ^6 g9 w
19.   /* Êä³ö±È½ÏʱÐòģʽÅäÖÃÉèÖà */
    ! g" y$ {) z% |$ Q) y4 D
20.   TIM3_OCInitStructure.TIM_OCMode = TIM_OCMode_Timing;
    9 N0 D: y6 U# e+ l" h
21.   TIM3_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    : x, b8 r; e& R
22. 
    
23.   /* Êä³ö±È½ÏʱÐòģʽÅäÖÃ: ƵµÀ3*/
    
24.   TIM3_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    
25.   TIM3_OCInitStructure.TIM_Pulse = TM3_CCR1_Val;  //3000
    4 r0 D$ ]; z! T" _8 ^* A
26.   TIM_OC3Init(TIM3, &TIM3_OCInitStructure);
    4 W. w2 F3 M3 A$ ?
27.   TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Disable);
    5 j+ D. C$ j: R$ G& B" D; y
28. 
    $ d+ Q: P/ d' f. g, c$ {& z
29.   /* TIM ÖжÏʹÄÜ */
    
30.   TIM_ITConfig(TIM3, TIM_IT_CC3 , ENABLE);
    
31. 
    
32.   /* TIM3 ʹÄÜ */
    
33.   TIM_Cmd(TIM3, ENABLE);
    
34. 
    
35. }

复制代码

' ?5 _' E' @/ N& s3. 中断子程序

1. void TIM3_IRQHandler(void)
   9 t5 O4 W7 j& n2 G4 Z- w
2. {
   
3.   if (TIM_GetITStatus(TIM3, TIM_IT_CC3) != RESET)
   
4.   {
   2 m2 j/ `5 \9 M% R; |  G; `
5.     TIM_ClearITPendingBit(TIM3, TIM_IT_CC3);
   
6. 
   
7.     /* LED3 toggling with frequency = 219.7 Hz */
   
8. //    LED1_Toggle();
   
9. //    capture3 = TIM_GetCapture3(TIM3);
   
10. //    TIM_SetCompare3(TIM3, capture3 + TM3_CCR1_Val);
    6 d9 X: {6 N& \) N& M( ]
11. 
    0 P* v4 z# j# q  n3 r" T  j
12.         OutToggle();
    
13. 
    ( {! x, a. K" l1 i3 a
14.         if(TimeRxFlag)
    " A, W/ d/ J) \- @; x* O
15.         {
      s) h) ]) ?, O2 M. }2 G$ h
16.             TimeInterval++;
    + S* Q+ K( o7 x( R4 B
17.             if(TimeInterval>4)
    
18.             {
    * a! F' G4 K9 C. O9 J
19.                 RxFrameEndFlag =1;
    * j; q( c% \) ^! ]6 N5 J2 |
20.             }
    
21.         }
    
22.         if(KeyCtrl.bDebunceTime != 0)
    2 S( ^% T# A' u" ?3 y6 T0 E. R
23.         {
    & o* @1 g8 Z/ ]* I5 a) z
24.                 KeyCtrl.bDebunceTime--;
    
25.         }
    
26. //        SevenSegShow(DispBuffer);
    
27.     capture3 = TIM_GetCapture3(TIM3);
    & E: S1 ]* J3 ]. M
28.     TIM_SetCompare3(TIM3, capture3 + TM3_CCR1_Val);
    , E$ P+ \3 G0 N% ]) Y: `% _
29.   }
    7 f% U  M1 h- Y3 P- n' O& N  C
30. }   

复制代码