LAUNCHXL-F28069M: lab13b中串口中断函数在哪里啊，没有找到

你可以看一下main函数所在.c文件开头注释中的介绍，里面包含了程序介绍、设置、外部连接、观测口等等很全面的信息。比如Example_2806xSci_Echoback.c中：

//!  This test receives and echo-backs data through the SCI-A port.
//!
//!  The PC application 'hypterterminal' can be used to view the data
//!  from the SCI and to send information to the SCI.  Characters received
//!  by the SCI port are sent back to the host.
//!
//!  \b Running \b the \b Application   
//!  -# Configure hyperterminal:
//!  Use the included hyperterminal configuration file SCI_96.ht.
//!  To load this configuration in hyperterminal
//!    -# Open hyperterminal
//!    -# Go to file->open
//!    -# Browse to the location of the project and
//!       select the SCI_96.ht file.
//!  -# Check the COM port.
//!  The configuration file is currently setup for COM1.
//!  If this is not correct, disconnect (Call->Disconnect)
//!  Open the File-Properties dialog and select the correct COM port.
//!  -# Connect hyperterminal Call->Call
//!  and then start the 2806x SCI echoback program execution.
//!  -# The program will print out a greeting and then ask you to
//!  enter a character which it will echo back to hyperterminal.
//!
//!  \note If you are unable to open the .ht file, you can create 
//!  a new one with the following settings
//!  -  Find correct COM port
//!  -  Bits per second = 9600
//!  -  Date Bits = 8
//!  -  Parity = None
//!  -  Stop Bits = 1
//!  -  Hardware Control = None
//!
//!  \b Watch \b Variables \n
//!  - \b LoopCount, for the number of characters sent
//!  - ErrorCount
//!
//! \b External \b Connections \n
//!  Connect the SCI-A port to a PC via a transceiver and cable.
//!  - GPIO28 is SCI_A-RXD (Connect to Pin3, PC-TX, of serial DB9 cable)
//!  - GPIO29 is SCI_A-TXD (Connect to Pin2, PC-RX, of serial DB9 cable)