目前在kernel驱动代码中,都不再建议直接使用printk直接添加打印信息,而是使用dev_info,dev_dbg,dev_err之类的函数代替,虽然这些dev_xxx函数的本质还是使用printk...dev_info():启动过程、或者模块加载过程等“通知类的”信息等,一般只会通知一次,例如probe函数; dev_dbg():一般使用在普通错误,如-EINVAL、-ENOMEM等errno发生处,...的地方,或者程序员不容易猜测系统哪里出了问题的地方; 动态调试使用方法 打开内核动态调试开关,make menuconfig选中CONFIG_DYNAMIC_DEBUG以及CONFIG_DEBUG_FS Linux...代码分析 从代码角度,也很容易看出dev_dbg()的设计: include/linux/device.h include/linux/dynamic_debug.h lib/dynamic_debug.c
(i) default_rate = int(dev_info['defaultSampleRate']) if not dev_info['hostApi'] and default_rate ==...fps and '映射器' not in dev_info['name']: if dev_info['maxInputChannels']: print('输入设备:', dev_info['name...']) elif dev_info['maxOutputChannels']: print('输出设备:', dev_info['name']) pynput监听键盘 在这部分代码也暂时使用pynput...if not dev_info['hostApi'] and default_rate == self.fps and '映射器' not in dev_info['name']:...elif dev_info['maxOutputChannels']: self.output_dict[dev_info['name']] = i def
前言 有时我们需要在 Linux 内核中预留一部分内存空间用作特殊用途(给安全模块使用,给其它处理器使用,或是给特定的驱动程序使用等),在 Device Tree 中有提供两种方法对预留内存进行配置:memreserve...会将从地址 0x40000000 开始共 1MB 的内存空间预留出来: /memreserve/ 0x40000000 0x00100000; 使用 memreserve 预留出来的内存一般无法再被 Linux...goto error1; } lp->paddr = r.start; lp->vaddr = memremap(r.start, resource_size(&r), MEMREMAP_WB); dev_info...dma_set_coherent_mask(dev, 0xFFFFFFFF); lp->vaddr = dma_alloc_coherent(dev, ALLOC_SIZE, &lp->paddr, GFP_KERNEL); dev_info...vaddr, lp->paddr); 给 CMA 预留内存 有时我们不需要将预留内存分配给特定的设备驱动,而只是想给默认 CMA 内存池分配一片固定的内存区域,这时我们可配置上“reusable”和“linux
-linux-gnu.a SRCS += $(PWD)/pjsip/lib/libpjmedia-codec-arm-himix100-linux-gnu.a SRCS += $(PWD)/pjsip...pj_pool_t *pool; pj_pool_factory *pf; unsigned dev_count; struct null_audio_dev_info *dev_info...null_audio_dev_info *ndi; /* Initialize input and output devices here */ nf->dev_count = 1; nf->dev_info... pj_pool_calloc(nf->pool, nf->dev_count, sizeof(struct null_audio_dev_info)); ndi = &nf->dev_info...struct null_audio_factory *nf = (struct null_audio_factory*)f; struct null_audio_dev_info *di = &nf->dev_info
5、添加Linux的crontab。 每小时收集一次信息(服务器配置) 实例 #!... futures = [] cmd = r'dis qos queue-statistics interface outbound | in "^ Drop"' dev_info.../iplist.txt") for d in dev_info: future = pool.submit(run, cmd, **d)
用户在使用连接会话前,必须定义一个存储会话内容的结构体,如下所示: ```c tdeviec_info *dev_info; dev_info = dev_para_init(DEV_NAME, VENDER...**其中ACCESS_KEY需要在平台申请** 示例代码如下所示: ```c ret = dev_register_init(wlan_info, dev_info, ACCESS_KEY); if...* Connected to the Internet to registe * * @param wlan_info: wifi name , wifi passwd * * @param dev_info...=2: device register failure */ char dev_register_init(twifi_info *wlan_info, tdeviec_info *dev_info
1.添加头文件 #ifdef CONFIG_HAS_EARLYSUSPEND #include linux/earlysuspend.h> #endif 2....CONFIG_HAS_EARLYSUSPEND1 /* * The higher the level, the earlier it resume, * and the later it suspend. */ dev_info
product_id = PRODUCT_ID; char *device_name = DEVICE_NAME; char *key = DEVICE_KEY; device_info_t dev_info...; memset(&dev_info, 0, sizeof(device_info_t)); /** * Please Choose your AT Port first, default...DEVICE_NAME_MAX_SIZE); strncpy(dev_info.device_serc, key, DEVICE_SERC_MAX_SIZE); tos_tf_module_info_set(&dev_info
在我们使用ARM等嵌入式Linux系统的时候,一个头疼的问题是GPU,Camera,HDMI等都需要预留大量连续内存,这部分内存平时不用,但是一般的做法又必须先预留着。.../module.h> #include linux/device.h> #include linux/fs.h> #include linux/miscdevice.h> #include linux...) { dma_free_coherent(cma_dev, (i + 1) * SZ_1M, dma_virt[i], dma_phys[i]); _dev_info...dma_virt[i] + (i + 1) * SZ_1M; p += PAGE_SIZE) *(u32 *)p = 0; _dev_info...return ret; } cma_dev = cma_test_misc.this_device; cma_dev->coherent_dma_mask = ~0; _dev_info
在linux内核系统中,各个模块、子系统之间是相互独立的。Linux内核可以通过通知链机制来获取由其它模块或子系统产生的它感兴趣的某些事件。...notifier_block结构体在include/linux/notifier.h中定义: struct notifier_block { notifier_fn_t notifier_call...struct msg21xx_ts_data *data = dev_get_drvdata(dev); int err; if (data->suspended) { dev_info
lresult[5] last_author = lresult[8] last_date = lresult[10] return lresult def genbuildreport(self): dev_info...font'] = 'size =1' td_dev = td_dev << font() td_dev.attributes['size'] = '2' pt = td_dev << p() pt dev_info...[2].strip() pt <<br() pt dev_info[5].strip() pt <<br() pt dev_info[8].strip() pt <<br() pt dev_info
char *device_name = "isnt0"; char *key = "C8CJeD69bCFvwsD13gnyBA=="; device_info_t dev_info...; memset(&dev_info, 0, sizeof(device_info_t)); esp8266_tencent_firmware_sal_init(HAL_UART_PORT...; strncpy(dev_info.device_serc, key, DEVICE_SERC_MAX_SIZE); tos_tf_module_info_set(&dev_info
product_id = PRODUCT_ID; char *device_name = DEVICE_NAME; char *key = DEVICE_KEY; device_info_t dev_info...; memset(&dev_info, 0, sizeof(device_info_t)); /** * Please Choose your AT Port first,...DEVICE_NAME_MAX_SIZE); strncpy(dev_info.device_serc, key, DEVICE_SERC_MAX_SIZE); tos_tf_module_info_set(&dev_info
轻量高效:模型体积小(3.3M),适合边缘设备部署跨平台:支持 Linux、macOS、Windows、Android、iOS、树莓派等易于集成:提供 Python、C++、Java、Swift 等多种语言...'index']}, 名称: {default_input_device['name']}") for i in range(p.get_device_count()): dev_info...= p.get_device_info_by_index(i) if dev_info['maxInputChannels'] > 0: # 只显示有输入通道的设备...logger.info(f" 设备 ID: {i}, 名称: {dev_info['name']}, 输入通道数: {dev_info['maxInputChannels']}") p.terminate
PRODUCT_ID; char *device_name = DEVICE_NAME; char *key = DEVICE_KEY; device_info_t dev_info...; memset(&dev_info, 0, sizeof(device_info_t)); int data_count=0 ; printf("Init.............DEVICE_NAME_MAX_SIZE); strncpy(dev_info.device_serc, key, DEVICE_SERC_MAX_SIZE); tos_tf_module_info_set(&dev_info
ret) dev_info(host->parent, "Got CD GPIO\n"); else if (ret != -ENOENT && ret !...号主:一枚机械专业本科生,经历了转行,从外包逆袭到芯片原厂的Linux驱动开发工程师,深入操作系统的世界,贯彻终身学习、终身成长的理念。
使用,也没有完善的资料,现在设备想在Linux系统下使用,要支持PClinux和嵌入式Linux设备,只能自己重新开发一个驱动再编写一个配套的上位机(上位机是采用QT写的)。.../init.h> #include linux/module.h> #include linux/usb.h> #include linux/sched.h> #include linux/slab.h...> #include linux/miscdevice.h> #include linux/fs.h> #include linux/io.h> #include ...interface,const struct usb_device_id *id) //资源探索函数 { int i=0; size_t buffer_size; struct usb_device *dev_info...\n"); /*通过接口获取设备信息*/ dev_info = interface_to_usbdev(interface); bcdUSB_p=(unsigned char *)&dev_info
important; } #colophon.site-footer .dev_info{ display:none !
前言 随着计算机技术的飞速发展,Linux操作系统作为开源领域的佼佼者,已经深入到了各个应用场景之中。在Linux系统中,内核与用户空间之间的交互是核心功能之一,而设备驱动则是实现这一交互的关键环节。...为了解决这个问题,Linux内核引入了UIO(Userspace I/O)驱动模型。 UIO驱动模型以其简洁、高效和灵活的特点,为开发者提供了一种新的设备驱动开发方式。...本文将深入剖析Linux UIO驱动模型的技术细节,包括其定义、软件架构、必要性、工作原理以及涉及的内核函数等。...一、什么是UIO UIO(Userspace I/O)是Linux内核中的一个轻量级驱动框架,它允许用户空间程序直接访问物理设备资源,如内存、中断和DMA通道等。...long irq_flags; void *priv; irqreturn_t(*handler)(int irq, struct uio_info *dev_info
pyaudio.PyAudio() print("\n可用的音频设备:") print("-" * 80) for i in range(pa.get_device_count()): dev_info...= pa.get_device_info_by_index(i) # 判断设备类型 input_ch = dev_info['maxInputChannels...'] output_ch = dev_info['maxOutputChannels'] if input_ch > 0 and output_ch > 0:...dev_type = "输出" else: dev_type = "未知" print(f"[{i:2d}] {dev_info...print(f" 类型: {dev_type}, 输入通道: {input_ch}, 输出通道: {output_ch}, " f"采样率: {int(dev_info