照着野火的教学视频编写了一个基本定时器的函数，其中用到的中断服务函数的子程序STM32f10x_it.c如下：
结果编译有错误..\Output\Basictim.axf: Error: L6218E: Undefined symbol time (referred from stm32f10x_it.o).
但是我在这段程序的一开头就已经定义了time变量，见下面蓝色字体。
是在不知道怎么办了，请教一下各位大神
/**
******************************************************************************
* @file Project/Template/stm32f10x_it.c
* @author MCD Application Team
* @version V3.0.0
* @date 04/06/2009
* @Brief Main Interrupt Service Routines.
* This file provides template for all exceptions handler and
* peripherals interrupt service routine.
******************************************************************************
* @copy
*
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
* TIME. AS A RESULT, STmicroELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*
* <h2><center>© COPYRIGHT 2009 STMicroelectronics</center></h2>
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_it.h"
#include "bsp_LED.h"
#include "bsp_exti.h"
#include "stm32f10x.h"
#include "bsp_usart.h"
#include "bsp_adc.h"
#include "stm32f10x_tim.h"
#include "bsp_BasicTim.h"
int8_t ucTemp;
extern uint16_t time;
extern uint16_t ADC_conversionValue;
/** @addtogroup Template_Project
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/******************************************************************************/
/* Cortex-M3 Processor Exceptions Handlers */
/******************************************************************************/
/**
* @brief This function handles NMI exception.
* @param None
* @retval : None
*/
void NMI_Handler(void)
{
}
/**
* @brief This function handles Hard Fault exception.
* @param None
* @retval : None
*/
void HardFault_Handler(void)
{
/* Go to infinite loop when Hard Fault exception occurs */
while (1)
{
}
}
/**
* @brief This function handles Memory Manage exception.
* @param None
* @retval : None
*/
void MemManage_Handler(void)
{
/* Go to infinite loop when Memory Manage exception occurs */
while (1)
{
}
}
/**
* @brief This function handles Bus Fault exception.
* @param None
* @retval : None
*/
void BusFault_Handler(void)
{
/* Go to infinite loop when Bus Fault exception occurs */
while (1)
{
}
}
/**
* @brief This function handles Usage Fault exception.
* @param None
* @retval : None
*/
void UsageFault_Handler(void)
{
/* Go to infinite loop when Usage Fault exception occurs */
while (1)
{
}
}
/**
* @brief This function handles SVCall exception.
* @param None
* @retval : None
*/
void SVC_Handler(void)
{
}
/**
* @brief This function handles debug Monitor exception.
* @param None
* @retval : None
*/
void DebugMon_Handler(void)
{
}
/**
* @brief This function handles PendSVC exception.
* @param None
* @retval : None
*/
void PendSV_Handler(void)
{
}
/**
* @brief This function handles SysTick Handler.
* @param None
* @retval : None
*/
void SysTick_Handler(void)
{
}
//串口中断服务函数
//
void DEBUG_USART_IRQHandler(void)
{
if(USART_GetITStatus(DEBUG_USARTx, USART_FLAG_RXNE)==RESET)
//也可以换成 if(USART_GetITStatus(DEBUG_USARTx, USART_IT_RXNE)!=RESET)
{
ucTemp = USART_ReceiveData(DEBUG_USARTx);
USART_SendData(DEBUG_USARTx, ucTemp);
}
}
//一.独立模式ADC,中断服务函数读取程序
/*
void ADC_IRQHandler(void)
{
if(ADC_GetITStatus(ADC_x, ADC_IT_EOC) == SET)
{
ADC_conversionValue = ADC_GetConversionValue(ADC_x);
}
ADC_ClearITPendingBit(ADC_x, ADC_IT_EOC);
}
*/
//基本定时器中断服务函数
void BASIC_TIM_IRQHandler(void)
{
//判断更新中断是否发生
if(TIM_GetITStatus(BASIC_TIM,TIM_IT_Update) != RESET)
{
time++;
//清除中断标志位
TIM_ClearITPendingBit(BASIC_TIM,TIM_IT_Update);
}
}
/******************************************************************************/
/* STM32F10x Peripherals Interrupt Handlers */
/* Add here the Interrupt Handler for the used peripheral(s) (PPP), for the */
/* available peripheral interrupt handler's name please refer to the startup */
/* file (startup_stm32f10x_xx.s). */
/******************************************************************************/
/**
* @brief This function handles PPP interrupt request.
* @param None
* @retval : None
*/
void EXTI4_IRQHandler(void)
{
//判断是否进入中断
if(EXTI_GetFlagStatus(EXTI_Line4)!=RESET)
{
//中断服务程序
LED_G_TOGGLE;
}
//执行中断服务函数完毕后，清除中断标志位
EXTI_ClearITPendingBit(EXTI_Line4);
}
/**
* @}
*/
/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/
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