定时器配置 void TIM3_Init(void)3 J9 ^& l e" w& q {* n- S; s6 ~; P5 Y7 |2 w+ R0 g1 C TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct; % K) H: {- n6 S# S( f v RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); TIM_DeInit(TIM3); 9 N; c q) G5 @0 [) I; [" U TIM_TimeBaseInitStruct.TIM_Prescaler=23999; TIM_TimeBaseInitStruct.TIM_CounterMode=TIM_CounterMode_Up ; TIM_TimeBaseInitStruct.TIM_Period=2000;' n/ A; E4 e. a# E TIM_TimeBaseInitStruct.TIM_ClockDivision=0x0; TIM_TimeBaseInit(TIM3, &TIM_TimeBaseInitStruct); TIM_Cmd( TIM3, ENABLE);* I# H4 d: {1 P+ l, j 3 c9 g! A5 x+ k; k/ D: u6 ] TIM_PrescalerConfig(TIM3, 23999, TIM_PSCReloadMode_Immediate);) f% F" `' S Y2 I$ W0 t' k TIM_ClearFlag(TIM3, TIM_FLAG_Update); TIM_ITConfig(TIM3, TIM_IT_Update , ENABLE); + `5 z" ^! t+ M* J4 _ }5 g$ K0 R6 d6 q % E9 l3 w5 O; J8 O { 中断% Z+ E# ]2 [% W3 {3 ?4 }) i: l' N9 Q/ C void Nvic_Init(void) { NVIC_InitTypeDef NVIC_InitStructure; NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn ; NVIC_InitStructure.NVIC_IRQChannelPriority = 0x00;- P: v' u7 x& C2 c, Q( u2 p NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); 4 \, I- @: y$ J* R }$ E9 b0 X) ~, K" `* v4 s( D v) s9 x1 m void TIM3_IRQHandler(void) { if (TIM_GetITStatus(TIM3, TIM_IT_Update)!=RESET)7 P' v8 s5 o6 @4 L( n1 e {9 J$ E+ K( ~5 W0 l5 L9 a TIM_ClearITPendingBit(TIM3, TIM_IT_Update); GPIO_WriteBit(LED_PORT, LED_PIN_1 , (BitAction)((1-GPIO_ReadOutputDataBit(LED_PORT, LED_PIN_1)))); m. m+ ^( c- a6 A% R$ i9 E }5 x* p' S# K! q' l, y } 1 m5 x& P; [, U8 l3 s8 O% K int main(void) { 5 h7 x% d. s* H SystemInit(); ; Y, Q' t* s2 ]+ L# n, D# k! B LED_Init(); 8 C2 b" L( z) B; a0 @2 r Nvic_Init();, ~3 D0 x7 ?' `* J$ g: `, g TIM3_Init();3 f- ]$ t, F$ }1 s% k while(1)" Z* l/ X0 G; }: L { , |8 ?5 C0 s' h5 q# C; J $ u2 r5 o1 a: y) ] }! t% p* Y, v, D' {# K; Y9 I } , @1 P0 B: }/ s4 a9 ]7 I |
072的板子
俺是初学者