【问题测试】

有个F407的跑马灯的例子，是MDK和IAR两个版本，MDK版本的例子下载并复位后可以正常看到LED闪烁，而IAR的例子下进去后，不会闪烁。

使用TOOL的上位机内核寄存器监测工具测试发现，硬件复位后竟然还在调试状态，邪门了

必须断电复位，断电复位后正常了：

或者LUA命令控制退出调试状态

【问题解决】

起初以为是启动代码里面封装的函数__iar_program_start造成，将其注释掉，直接跳转到mian也不行

最后测试发现是半主模式配置问题，之前测试的8.50版本是半主模式配置 + fputc重新写，实际测试不会再执行半主操作了

进入IAR9,X后，这种配置不行了，必执行半主操作，导致运行起来了，还处于调试模式状态。使用9.X要关闭半主，并且重新定向串口

/********************* Copyright 1998-2017 IAR Systems AB.** This is a template implementation of the "__write" function used by* the standard library.  Replace it with a system-specific* implementation.** The "__write" function should output "size" number of bytes from* "buffer" in some application-specific way.  It should return the* number of characters written, or _LLIO_ERROR on failure.** If "buffer" is zero then __write should perform flushing of* internal buffers, if any.  In this case "handle" can be -1 to* indicate that all handles should be flushed.** The template implementation below assumes that the application* provides the function "MyLowLevelPutchar".  It should return the* character written, or -1 on failure.*********************/#include <LowLevelIOInterface.h>#pragma module_name = "?__write"int MyLowLevelPutchar(int x)
{comSendChar(COM1, x);return x;}/** If the __write implementation uses internal buffering, uncomment* the following line to ensure that we are called with "buffer" as 0* (i.e. flush) when the application terminates.*/size_t __write(int handle, const unsigned char * buffer, size_t size)
{/* Remove the #if #endif pair to enable the implementation */
#if 1size_t nChars = 0;if (buffer == 0){/** This means that we should flush internal buffers.  Since we* don't we just return.  (Remember, "handle" == -1 means that all* handles should be flushed.)*/return 0;}/* This template only writes to "standard out" and "standard err",* for all other file handles it returns failure. */if (handle != _LLIO_STDOUT && handle != _LLIO_STDERR){return _LLIO_ERROR;}for (/* Empty */; size != 0; --size){if (MyLowLevelPutchar(*buffer++) < 0){return _LLIO_ERROR;}++nChars;}return nChars;#else/* Always return error code when implementation is disabled. */return _LLIO_ERROR;#endif}