< //*****************************************************************************
//
// uart_echo.c - Example for reading data from and writing data to the UART in
//               an interrupt driven fashion.
//
// Copyright (c) 2005-2011 Texas Instruments Incorporated.  All rights reserved.
// Software License Agreement
//
// Texas Instruments (TI) is supplying this software for use solely and
// exclusively on TI's microcontroller products. The software is owned by
// TI and/or its suppliers, and is protected under applicable copyright
// laws. You may not combine this software with "viral" open-source
// software in order to form a larger program.
//
// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
// DAMAGES, FOR ANY REASON WHATSOEVER.
//
// This is part of revision 7611 of the EK-LM3S811 Firmware Package.
//
//*****************************************************************************

Firmware版本已到7611！

;******************************************************************************
;
; External declaration for the interrupt handler used by the application.
;
;******************************************************************************
        EXTERN  UARTIntHandler
.....
.....
        DCD     IntDefaultHandler           ; GPIO Port C
        DCD     IntDefaultHandler           ; GPIO Port D
        DCD     IntDefaultHandler           ; GPIO Port E
        DCD     UARTIntHandler              ; UART0 Rx and Tx
        DCD     IntDefaultHandler           ; UART1 Rx and Tx
        DCD     IntDefaultHandler           ; SSI0 Rx and Tx

原帖由 academic 于 2011-9-22 21:48 发表 ;****************************************************************************** ; ; External declaration for the interrupt handler used by the application. ; ;************************************* ...

 

用到了中断的话，得在startup.s里注册

 

另外，我记得那个例程是有点问题的，发送字符比较长的时候，会有丢字符的问题。

好像是因为调用的函数问题，它调用的串口函数把要发送的字符丢了就跑的，没有考虑fifo是否满，没有考虑前面字符是否发送完毕。

原帖由 academic 于 2011-9-22 21:48 发表
;******************************************************************************
;
; External declaration for the interrupt handler used by the application.
;
;************************************* ...

问题确实出在这个地方，需要在startup文件里申明中断处理。这个问题真不会想到会出现在这个自动生成的文件中。