在主程序中加入串口配置函数之后LED翻转的中断函数就不起作用了

阿祖32 · 发表于 2015-12-16 20:20:57

[mw_shl_code=c,true]#include "stm32f10x.h" #include "TIMBASE.h" #include "LED.h" #include "USART_CONFIG.h" volatile u32 time = 0; int main() { LED_PB5_Config(); USARTx_config(); TIM2_Config(); TIM2_NVIC_Config(); RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE); while(1) { if(time == 1000) { LED_TOGGLE(GPIOB,GPIO_Pin_5); time = 0; } } } void TIM2_IRQHandler(void) { if ( TIM_GetITStatus( TIM2, TIM_IT_Update) != RESET ) { time++; TIM_ClearITPendingBit(TIM2 , TIM_FLAG_Update); } } [/mw_shl_code]

上面是主函数的程序；

[mw_shl_code=c,true]void USARTx_config(void) { GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_USART1, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA,&GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); /*USARTx???±??????*/ USART_InitStructure.USART_BaudRate = 115200; USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_StopBits = USART_StopBits_1; USART_InitStructure.USART_Parity = USART_Parity_No; USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; USART_Init(USART1,&USART_InitStructure); USART_Cmd(USART1,ENABLE); USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); USART_ClearFlag(USART1, USART_FLAG_TC); } [/mw_shl_code]

上面是串口配置的程序；

[mw_shl_code=c,true]#include "TIMBASE.h" void TIM2_NVIC_Config(void) { NVIC_InitTypeDef NVIC_InitStructure; NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } void TIM2_Config(void) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE); TIM_TimeBaseStructure.TIM_Period = 1000; TIM_TimeBaseStructure.TIM_Prescaler = 71; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); TIM_ClearFlag(TIM2,TIM_FLAG_Update); TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE); TIM_Cmd(TIM2,ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,DISABLE); }[/mw_shl_code]

上面是关于定时器设置的程序；