VxWorks平台Tornado环境下键盘输入疑难解释

前言

VxWorks是实时操作系统，不面向普通用户，面向特别行业。国内资料比较少，这里翻译些和我项目有关的外文资料。

提问

Could anyone be kind enough to help me out with the following ? Thanks a lot, (its a kind of long message, sorry for that)

I recently changed from Tornado1 to TornadoII.2. And as is expected not all code works instantly. Especially troublesome at the moment is
the fact that I am unable to read in (for processing)keyboard input at the target side.我最近从Tornado1改为TornadoII.2。正如预期的那样并非所有代码都能立即生效，特别麻烦的是我在目标方无法读入（用于处理）键盘输入。

of course when making the bootdisk i included in config.h :
#INCLUDE_PC_CONSOLE and also in the vxworks kernel (PC_CONSOLE was selected (BAUDRATE 9600 - N_VIRTUAL_CONSOLE (2) - PC_CONSOLE (0)).

and after initialisation i can actually use the keyboard and see the typed results on the monitor. Checking the devices i see

当然，当我制作bootdisk时，我在config.h中包含了：
#INCLUDE_PC_CONSOLE以及vxworks内核（PC_CONSOLE被选择（BAUDRATE 9600 - N_VIRTUAL_CONSOLE（2） - PC_CONSOLE（0））。

初始化后，我可以实际使用键盘，看看在监视器上键入结果。检查我看到的设备

-> devs
drv name
0 /null
1 /tyCo/0
1 /tyCo/1
2 /pcConsole/0
2 /pcConsole/1
4 /fd0
6 lizard:
7 /vio

so far, everything normal. Now, when i try to read in the pushed keys on the keyboard i fail !!! (following code worked in Tornado1 !?!).
This, although i can see them actually being displayed on the monitor, and by setting ioctl (0, FIOSETOPTIONS, OPT_TERMINAL & ~OPT_LINE); i
can see them even twice. Now, the code which used to work (Tornado1) is simply

到目前为止，一切正常。现在，当我尝试读入按键时，我失败了！（以下代码在Tornado1中工作！？！）。
这个，虽然我可以看到它们实际显示在显示器上，并通过设置ioctl（0，FIOSETOPTIONS，OPT_TERMINAL和~OPT_LINE）; 我甚至可以看到他们出现两次。现在，以前的代码（Tornado1）很简单

/* Save options */
options = ioctl(0, FIOGETOPTIONS, 0);
/* Enter raw mode */
ioctl (0, FIOSETOPTIONS, OPT_TERMINAL & ~OPT_LINE & ~OPT_ECHO);
while(!(key = keyhit())){;} /* just a waiting loop. */
ioctl (0, FIOSETOPTIONS, options);

with
int keyhit(void)
{
int nread,rc,oneChar=0;

/* probe STDIN to see if operator entered any characters */
rc = ioctl(0, FIONREAD, (int) &nread);
assert(rc != ERROR);
if (nread)
{ /* got a char */
/* flush all the characters entered */
for (; nread; nread--)
oneChar=getchar();
return oneChar;
}
return 0;
} /* keyhit */

I tried already a lot of stuff, but all fail. The system does not read the data and the task is pending.

ps: getchar() also makes the system PENDING, without result. I tried to use the code in bootConfig.c where automatic boot of the system ca
n be prevented by a keyboard hit, but also this was unsuccesfull.
Question, i suppose STDIN has fp=0, and ioctl (0, FIOSETOPTIONS, OPT_TERMINAL & ~OPT_LINE)seems to confirm this (by duplicating the
input of the keyboard), this is correct, right ?

我已经尝试了很多东西，但都失败了。系统无法读取数据，任务正在等待中。

ps：getchar（）也使系统PENDING，没有结果。我试过了使用bootConfig.c中的代码，里面系统自启动能被键盘按键阻止，但这也是不成功的。
问题，我想STDIN有fp = 0和ioctl（0，FIOSETOPTIONS， OPT_TERMINAL＆~OPT_LINE）似乎证实了这一点（通过复制输入键盘），这是对的，对吗？

Every help is welcome ! Please show me some light at the
end of this tunnel,

回答1

could you use the device 1 as standinput deivce,and try? i remember device0 is stand output device ,and device2 is stand error output device.

你可以使用设备1作为标准输出，并尝试？我记得device0是标准输出设备，而设备2是标准错误输出设备。

回答2

nope, the task hangs also in this case :-( By the way, i did some more reading (newsgroup) and found some comments about functions
ioGlobalStdGet(i) and ioTaskStdGet(taskid,i) giving the fd's of both global and task-dependend io. And strange but true if i call these for
standard input, standard output, standard error (0,1,2), they all return the value 3 !!! Probably this has to do something with a VIRTUAL CONSOLE or something ? What do you think ?

不，在这种情况下任务也挂起:-(顺便说一句，我做了一些阅读（新闻组）并找到一些关于功能的评论ioGlobalStdGet（i）和ioTaskStdGet（taskid，i）向fd提供了
全局和任务依赖的io。如果我针对标准输入，标准输出，标准误差（0,1,2）调用这2个函数，它们都是返回值3，很奇怪但确实哪样。可能这需要对VIRTUAL CONSOLE 做一些事情
还是什么？你怎么看？

Manu,

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