F103 无法进入串口发送中断

麦克塔维什 · 发表于 2015-9-13 10:41:32

[mw_shl_code=c,true]#include "stm32f10x.h" void USART1_Init() { NVIC_InitTypeDef NVIC_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_Init(GPIOA, &GPIO_InitStructure); NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); USART_InitStructure.USART_BaudRate = 9600; 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_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; USART_Init(USART1, &USART_InitStructure); USART_Cmd(USART1, ENABLE); USART_ITConfig(USART1, USART_IT_TC, ENABLE); USART_ITConfig(USART1, USART_IT_RXNE, DISABLE); } int global = 50; int main(void) { USART1_Init(); while (1) { USART_SendData(USART1, global); } return 0; } void USART1_IRQHandler(void) { if(USART_GetITStatus(USART1, USART_IT_TC) == SET) { USART_ClearFlag(USART1, USART_FLAG_TC); } global++; } [/mw_shl_code]

我想发送数据时就进入中断，然而JTAG调试发现只有在执行
[mw_shl_code=c,true]USART_ITConfig(USART1, USART_IT_TC, ENABLE);[/mw_shl_code] [mw_shl_code=c,true]这一步时会进入一次中断，在主函数中发送字符时不会进入中断，请大家指点迷津是什么原因？ [/mw_shl_code]