2.TCGETS/TCSETS:获取/设置终端属性 这两个命令用于获取/设置终端的属性,可以用于调整终端的控制模式、波特率等。以下是示例代码: ```c #include <stdio.h> #include <termios.h> #include <unistd.h> int mai struct termios old_tio, new_tio; tcgetattr(STDIN_FILENO, &old_tio); // 获取终端属性 ne...
1. 设备IO命令:通过ioctl函数可以对设备进行读写操作,常用的设备IO命令有以下几种: -FIONREAD:获取输入缓冲区中的字节数; -FIONBIO:设置套接字为非阻塞模式; -TIOCSBRK/TIOCCBRK:控制串行通信中的发送或停止发送中断信号; -TCGETS/TCSETS:获取或设置终端的配置参数。 2. 文件IO命令:ioctl函数还可以对文件进行...
You won't have symbolic ioctl names, but this is still sufficient for some tests. Bugs Currently all symbolic names are automaticaly generated. However some ioctls (like TCGETS) cannot be detected automaticaly. We have to add manual entries for them (patches are welcome).About...
return -1; } The perror function tell me "Invalid argument". I 'googled' many pages about ioctl and TIOCSRS485 and everybody use a similar code . The only values that function with ioctl is 2 and 0x5401 (TCGETS). I use a 3.0.0-1-686-pae kernel. ...
1: no signals are blocked 2: fatal signals are blocked while decoding syscall (default) 3: fatal signals are always blocked (default if '-o FILE PROG') 4: fatal signals and SIGTSTP (^Z) are always blocked (useful to make 'strace -o FILE PROG' not stop on ^Z) ...
1.获取设备状态: 有些设备可以通过ioctl命令获取当前状态,例如获取串口设备的波特率和数据位数等信息。 structtermios options; ioctl(fd, TCGETS, &options); 2.控制设备操作: ioctl命令还可以用于控制设备的操作,例如启动或停止设备。 ioctl(fd, START_DEVICE); 3.设置设备参数: 通过ioctl命令还可以设置设备的特定...
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ioctl(4, SNDCTL_TMR_TIMEBASE or TCGETS, 0xbffc14f8) = -1 ENOTTY (Inappropriate ioctl for device) 请您参考如下方法: 很可能这意味着打开没有失败。 当Perl 打开文件时,它会通过发出TCGETS来检查该文件是否是 TTY(以便它可以回答-T $fhfiletest 运算符) > ioctl 反对它。如果文件是常规文件而不是 ...
ioctl(4, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, {B115200 opost isig icanon echo ...}) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x776ef000 _llseek(4, 0, 0x7f9e5f70, SEEK_CUR) = -1 ESPIPE (Illegal seek) ...
一个下层的过滤驱动程序位于类别驱动程序和总线驱动程序之间，如图1。类别驱动程序会将要求传给下层的过滤驱动程序，然后再传给总线驱动程序。 图１应用程序与驱动程序完成USB通信的结构 通用串行总线驱动程序（USBD.SYS）是USB系统中负责管理通用串行总线的工作，位于主机上的一个软件。USBD负责控制所有的USB协议操作...