STM32F103ZET6 UART4无法进入中断 - CSDN文库

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STM32F103ZET6 UART4无法进入中断无法进入中断

调了两天UART4，现象是查询方式收发都正常。但是无法使用中断方式，仿真检查了UART4的寄存器配置完全

正常，NVIC寄存器配置也正常。接收数据后NVIC的IABR也相应置位。

更换3.5.0库的startup_stm32f10x_hd.s也不行实在没有办法。网上查可以REMAP USART3串口使用。于是使用USART3、和

库自带的startup_stm32f10x_hd.s编译下载，现象和UART4一样无法进入中断。更换回中断生成的 STM32F10x.s 后成功进入

USART3中断。由此判断库自带的startup_stm32f10x_hd.s存在问题。对比STM32F10x.s 和startup_stm32f10x_hd.s文件发现

处理XXX_Handler以外还有很多不同的地方。于是把不同的地方改成与STM32F10x.s一样后，再配置UART4就可以进入中断

了。

修改完成的代码贴出来：

;******************** (C) COPYRIGHT 2011 STMicroelectronics ********************

;* File Name : startup_stm32f10x_hd.s

;* Author : MCD Application Team

;* Version : V3.5.0

;* Date : 11-March-2011

;* Description : STM32F10x High Density Devices vector table for MDK-ARM

;* toolchain.

;* This module performs:

;* - Set the initial SP

;* - Set the initial PC == Reset_Handler

;* - Set the vector table entries with the exceptions ISR address

;* - Configure the clock system and also configure the external

;* SRAM mounted on STM3210E-EVAL board to be used as data

;* memory (optional, to be enabled by user)

;* - Branches to __main in the C library (which eventually

;* calls main()).

;* After Reset the CortexM3 processor is in Thread mode,

;* priority is Privileged, and the Stack is set to Main.

;* <<< Use Configuration Wizard in Context Menu >>>

;*******************************************************************************

; 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.

;*******************************************************************************

; Amount of memory (in bytes) allocated for Stack

; Tailor this value to your application needs

; Stack Configuration

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