if (atomic_cmpxchg(&cdata..., version) == 0) return 0; // we were first! return -EPERM; // somebody has changed the version before us! > > > > Shouldn't be rather > > > > > > > > if (atomic_cmpxchg() == 0) { > > > > if (atomic_read() != version) > > > > ...
> > if (atomic_cmpxchg(&cdata..., version) == 0) > > return 0; // we were first! > > return -EPERM; // somebody has changed the version before us! > > > > Which can fail if two callers are requesting the same version - in a > race the second one will get a fail - ...
library encapsulating the cumbersome, ioctl-based kernel-userspace interaction in a set of convenient functions and opaque data structures. Additionally this project contains a set of command-line tools that should allow an easy conversion of user scripts to using the character device. BUILDING ---...
The results might differ compared to plain JTAG/SWD srst_only separate srst_nogate srst_open_drain connect_assert_srst Info : clock speed 2000 kHz Info : STLINK V2J29M18 (API v2) VID:PID 0483:374B Info : Target voltage: 3.255790 Info : [stm32f4x.cpu] Cortex-M4 r0p1 processor detect...
应用程序在打开设备文件后,需要调用 ioctl 来获取 GPIO 的默认工作模式或设置 GPIO 的工作模式。当应用程序读取相应 GPIO 引脚的设备文件时,需要将至少一个 Byte 大小的缓冲传递给底层的驱动,驱动程序将判断当前操作的 GPIO 是否处于输入模式;如果处于输入模式则读取 GPIO 引脚的电平,并返回 GPIO 状态给应用程序 —...
ioctl.h>#definePCF8574_DEBUG 1#if(PCF8574_DEBUG == 1)#definePRK(...) printk(__VA_ARGS__)#else#definePRK(...)#endif#defineDRV_NAME "pcf8574"#defineDRV_DESC "use i2c to extend i/o"#defineDRV_VERSION "0.1.0"//#define PCF8574_NODE_NAME DRV_NAME#definescl_pin 17#definesda_pin...
规格用量:12路模拟Mic/Line输入8路模拟Line输出1个8x8USB声卡8路AEC回声消除1个卡槽用于定义音频选项卡支持USB声卡,Voip卡,模拟电话卡,AEC回声消除卡,模拟输入/出卡,数字输入/出卡64x64Dante网络音频通道,支持AES678个可自定义的GPIO600个开放式DSP,均衡器、压缩器、反馈抑制器、扬声器管理器、AGC、DUCKER等支持...
规格用量:处理器IntelI5-7267U主频3.1GHz内存8GDDR4系统WINDOWS/LINUX存储MSATA1×128GMSATASATA1×1TBSATA2.5英寸显示HDMI支持1920×1200VGA支持1920×1200前置I/OUSB2×USB2.0串口2×RS-232音频1×LINEOUTGPIO14路GPIO后置I/OUSB4×USB3.0串口2×RS-232/2×RS232-422-485网口2个intelI211千兆以太网,支持远程...
1. The parameter "gpio" of the function pinctrl_gpio_get_mux_owner should be "gc->base + info->offset" rather than "info->offset". 2. The member "strict" of s32cc_pmx_ops can be used to mark the flag GPIO_V2_LINE_FLAG_USED, so there is no need to use the funciton ...
master LICENSES bindings contrib dbus examples include Makefile.am gpiod.h lib man sphinx tests tools .gitignore .readthedocs.yaml CONTRIBUTING.md COPYING Doxyfile.in Makefile.am NEWS README TODO autogen.sh configure.ac Latest commit Cannot retrieve latest commit at this time. ...