定时器LED闪烁

wamcncn · 2015-01-30T13:35:50+00:00

定时器配置 S# X4 M9 x7 I3 jvoid TIM3_Init(void) U, {9 y2 Q/ L+ D+ o{# K( E! H( H9 @% f * L- b$ W# Z& e5 i) V3 ` TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct; 0 y" n! K& Y9 y RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);( E% ]4 [. d- a TIM_DeInit(TIM3);* s; T# b/ z2 a# v" Z" m% } ! J: }; W. E# X) `/ _ : ~7 F4 H: T. }+ I( B6 d TIM_TimeBaseInitStruct.TIM_Prescaler=23999; - C$ `6 o6 l0 }* D# d4 j |( t TIM_TimeBaseInitStruct.TIM_CounterMode=TIM_CounterMode_Up ;% k0 o# x+ P3 e, |* O0 [ TIM_TimeBaseInitStruct.TIM_Period=2000; ! ~; L; s ~* o/ ]9 n0 D TIM_TimeBaseInitStruct.TIM_ClockDivision=0x0; 7 `2 A& I9 l! R; q; P- z$ I9 H2 i TIM_TimeBaseInit(TIM3, &TIM_TimeBaseInitStruct);% d. {0 D$ ~9 s- ~1 _) ~ TIM_Cmd( TIM3, ENABLE);+ _4 z5 |( v% v" g- I3 G ( s8 w5 ]0 i6 L4 ~' x TIM_PrescalerConfig(TIM3, 23999, TIM_PSCReloadMode_Immediate); 3 c0 m8 T! \6 K TIM_ClearFlag(TIM3, TIM_FLAG_Update);8 E$ q4 ^1 ?- c/ I TIM_ITConfig(TIM3, TIM_IT_Update , ENABLE); + ?' P. X* ]& S5 k) J F" U" G & J; r/ e: w+ C ; I- n. n- |% D}& O) N. B5 O# j9 Z0 C 8 e: k' Q8 }: p) h4 g x# K4 N* c& \1 D" J! y$ X9 [5 ] 中断 : B; P# K; u% ^5 ]8 Pvoid Nvic_Init(void). B6 H b) |/ f& j { $ k6 Q0 T( e- B2 a, F/ a ( p* M5 y8 c- y$ {1 b6 A# S' @ NVIC_InitTypeDef NVIC_InitStructure; 4 I$ G6 @) p: s NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn ; ) \ j4 n9 d$ S9 ?6 `* K NVIC_InitStructure.NVIC_IRQChannelPriority = 0x00;9 j( ~) `9 B7 S6 C: R3 } NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;& @# Y" c; \2 `" m NVIC_Init(&NVIC_InitStructure); ; V% v N% `& Z4 e$ `- b$ A- X0 B ) n. a- j% D \5 D E/ E } 8 l$ U# k/ V) Z0 G. C8 P& E. u1 e: }3 i+ y9 L& i void TIM3_IRQHandler(void)+ K) V* W, E+ g( w) H! q. c; A {; U4 k) r* P4 g* d if (TIM_GetITStatus(TIM3, TIM_IT_Update)!=RESET)) M5 a/ k, l: T* v& P {" S* G/ J0 ~5 g TIM_ClearITPendingBit(TIM3, TIM_IT_Update);& [) Z- s5 R, [5 a GPIO_WriteBit(LED_PORT, LED_PIN_1 , ; X4 o A$ u8 N (BitAction)((1-GPIO_ReadOutputDataBit(LED_PORT, LED_PIN_1)))); ( }5 X. _2 Y& [" F! s) j }1 Z* ]4 O, z) D( S* i2 i, J9 a+ ^1 o } # g* ~3 I8 O, r x- X! e7 i* i/ _" e! h9 O+ F! M7 M int main(void) " A* r2 V1 o6 a$ k{ 4 Q/ f1 Q( e" w) E 1 T- k5 J' ?" d3 K. `) L% ]( ?; b r SystemInit(); + g' f( E: Y9 ^ LED_Init(); ' ~2 d% u7 x) A( ?: _( n Nvic_Init(); p" P. H( F! U' _8 }$ I$ _ TIM3_Init(); e4 o* t, S5 [. a while(1)( f/ g3 C4 H3 u) L# v { ( K6 f9 W* @! i! [# U 2 b9 |2 F3 m, F, V7 y' j } ) T D" J" @3 i, r& [} ) ]4 _/ X' d) i5 ~+ E( o' \7 M8 f/ a6 G# g( e5 q9 C& S & k# M8 e* j( \/ A2 s7 X7 X9 Z Y

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wamcncn 发布时间：2015-1-30 21:35

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定时器配置
void TIM3_Init(void)
{

TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
TIM_DeInit(TIM3);

TIM_TimeBaseInitStruct.TIM_Prescaler=23999;
TIM_TimeBaseInitStruct.TIM_CounterMode=TIM_CounterMode_Up ;
TIM_TimeBaseInitStruct.TIM_Period=2000;
TIM_TimeBaseInitStruct.TIM_ClockDivision=0x0;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseInitStruct);
TIM_Cmd( TIM3, ENABLE);

TIM_PrescalerConfig(TIM3, 23999, TIM_PSCReloadMode_Immediate);
TIM_ClearFlag(TIM3, TIM_FLAG_Update);
TIM_ITConfig(TIM3, TIM_IT_Update , ENABLE);

}

中断
void Nvic_Init(void)
{

NVIC_InitTypeDef  NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel =  TIM3_IRQn ;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

}

void TIM3_IRQHandler(void)
{
if (TIM_GetITStatus(TIM3, TIM_IT_Update)!=RESET)
{
      TIM_ClearITPendingBit(TIM3, TIM_IT_Update);
      GPIO_WriteBit(LED_PORT, LED_PIN_1 ,
            (BitAction)((1-GPIO_ReadOutputDataBit(LED_PORT, LED_PIN_1))));
}
}

int main(void)
{

SystemInit();
LED_Init();
Nvic_Init();
TIM3_Init();
while(1)
{

  }
}