例如,可以编写一个脚本,在特定条件下使用beep命令产生不同频率和持续时间的蜂鸣声。 总之,beep命令是在Linux系统中产生蜂鸣声的一种简单而有用的方法。无论是作为提示工具,还是在特定任务中的使用,beep命令都能在命令行下发出具有不同频率和持续时间的声音。通过灵活运用beep命令,可以实现更多个性化的功能和创意。如果...
drivers/char/EmbedSky_beep.c: In function 'xiaoyang_beep_init': drivers/char/EmbedSky_beep.c:134: error: implicit declaration of function 'class_device_create' drivers/char/EmbedSky_beep.c: In function 'xiaoyang_beep_exit': drivers/char/EmbedSky_beep.c:148: error: implicit declaration of ...
drivers/char/EmbedSky_beep.c: In function 'xiaoyang_beep_init': drivers/char/EmbedSky_beep.c:134: error: implicit declaration of function 'class_device_create' drivers/char/EmbedSky_beep.c: In function 'xiaoyang_beep_exit': drivers/char/EmbedSky_beep.c:148: error: implicit declaration of ...
GNU C对标准C进行一系列扩展,以增强标准C的功能。...open: generic_file_open, release: ext2_release_file, fsync: ext2_sync_file, }; 但是,Linux...C99已经支持__func__宏,因此建议在Linux编程中不再使用__FUNCTION__,而转而使用__func__: void example(void) { printf("This...Linux内核编程时...
Due to the nature and function of aterminal emulator, it can preliminarily interpret and change the effect of a<BEL>. Because of this, many terminal emulators include a setting that can control the bell or beeping within the application. ...
input_event定义在linux/input.h,如下: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 struct input_event{struct timeval time;__u16 type;__u16 code;__s32 value;};struct timeval{__kernel_time_t tv_sec;/* seconds */__kernel_suseconds_t tv_usec;/* microseconds */};// On my system,...
KERNELDIR := $(ARM_LINUX_KERNEL_HOME) CURRENT_PATH := $(shell pwd) obj-m :=misc-beep.o build: kernel_modules kernel_modules: $(MAKE) -C $(KERNELDIR) M=$(CURRENT_PATH) modules clean: $(MAKE) -C $(KERNELDIR) M=$(CURRENT_PATH) clean Binary file added BIN +10.4 KB misc/beep...
handles beep's attempt to poke at (for non-programmers: ioctl is a sort of catch-all function that lets you poke at things that have no other predefined poking-at mechanism) the tty, which is how it beeps. The short story is, the kernel checks that either: - you are the superuser ...
(gst-launch-0.10:2349): GStreamer-CRITICAL **: gst_pad_set_chain_function: assertion `GST_IS_PAD (pad)' failed (gst-launch-0.10:2349): GStreamer-CRITICAL **: gst_pad_set_event_function: assertion `GST_IS_PAD (pad)' failed (gst-launch-0.10:2349): GStreamer-CRITICA...
cycle as a function of capacity) and type (single vs. multi task). The feature object contains the name of the feature-set, actual values of the features in a dataframe X, feature names in feature_labels, nominal_capacity of the cell in the first few cycles and the outcomes y for ...