大侠在哪儿呢?请问一下下面这个程序怎样设置优先级呢?怎样就能用一根中断线配置两个中断口,中断服务程序怎么写啊,
求大神指导啊,
************************************************************************/
#include "
STM32f10x.h"
#include "string.h"
/***********************************************************************
外设时钟使能
************************************************************************/
void RCC_Configura
tion(void)
{
/* 使能外设时钟 */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_AFIO |
RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC |
RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
}
/*******************************************************************************
全部用到的引脚将在在配置
*******************************************************************************/
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
// /* 配置串口1引脚 */
// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
// GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
// GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
// 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);
/*外部中断引脚*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOE, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOE, &GPIO_InitStructure);
/*LED*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
/*******************************************************************************
全部中断在此配置
*******************************************************************************/
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* Configure the NVIC Preemption Priority Bits */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
/* Enable the USART1 Interrupt */
// NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
// NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
// NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
// NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn; // S4中断入口
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
// NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn; // S3中断入口
// NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
// NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
// NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/*******************************************************************************
外部中断在此配置
*******************************************************************************/
void EXTI_Configuration(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
GPIO_EXTILineConfig(GPIO_PortSourceGPIOD, GPIO_PinSource13); // S4中断
EXTI_InitStructure.EXTI_Line = EXTI_Line13;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_PinSource13); // S3中断
EXTI_InitStructure.EXTI_Line = EXTI_Line13;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_PinSource5); // S3中断
EXTI_InitStructure.EXTI_Line = EXTI_Line5;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
//EXTI_GenerateSWInterrupt(EXTI_Line13);
}
/*******************************************************************************
初始化时钟晶振 72MHZ
*******************************************************************************/
void SysClock_Init(void)
{
ErrorStatus HSEStartUpStatus;
RCC_DeInit();
RCC_HSEConfig(RCC_HSE_ON);
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS){
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
FLASH_SetLatency(FLASH_Latency_2);
RCC_HCLKConfig(RCC_SYSCLK_Div1);
RCC_PCLK2Config(RCC_HCLK_Div1);
RCC_PCLK1Config(RCC_HCLK_Div2);
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET){
;
}
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource() != 0x08){
;
}
}
}
/*****************************************************************
USART1 初始化 baud 波特率
*****************************************************************/
void USART1_Init(unsigned int baud)
{
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = baud;
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_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_Cmd(USART1, ENABLE);
}
/*****************************************************************
从 USART1 发送一个字节
*****************************************************************/
void USART1_SendByte(unsigned char temp)
{
USART_SendData(USART1, temp);
while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
}
/*****************************************************************
从 USART1 发送字符串
*****************************************************************/
void USART1_Printf(char *pch)
{
while(*pch != ''){
USART1_SendByte(*(unsigned char *)pch);
pch++;
}
}
/******************************************
*
* 延时程序 ms
*
****************************************/
void Delay(unsigned short time)
{
unsigned short i, j;
for(; time > 0; time--){
for(j = 0; j < 10; j++){
for(i = 0; i < 1000; i++);
}
}
}
/*******************************************************
MAIN 函数
*******************************************************/
int main(void)
{
SysClock_Init(); // 初始化系统时钟 72MHZ
RCC_Configuration(); // 使能外设
GPIO_Configuration(); // 配置引脚
NVIC_Configuration(); // 配置中断
EXTI_Configuration();
// USART1_Init(9600); // 配置串口1,波特率9600
//
// USART1_Printf("火牛
开发板基础实验");
while(1){
;
}
// return(0);
}
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