/**< memory device */DEVICE_CLASS_CAN,/**< CAN device */DEVICE_CLASS_RTC,/**< RTC device */DEVICE_CLASS_SOUND,/**< Sound device */DEVICE_CLASS_GRAPHIC,/**< Graphic device */DEVICE_CLASS_I2C_BUS,/**< I2C
DEB_LOG("open /dev/rtc NG, errno=%d msg=%s", errno, strerror(errno));return-1; }/*设定 RTC 的时钟频率 2~8192Hz,最小精度为123微秒*/if(ioctl(*fd, RTC_IRQP_SET, freq) <0) { DEB_LOG("ioctl(RTC_IRQP_SET)"); close(*fd);return-1; }/*启动 RTC 时钟*/if(ioctl(*fd, RTC_...
TL;DR: The Adafruit PCF8523 Real Time Clock for Raspberry Pi loses time due to a combination of issues in (1) the pcf8523 chip, (2) the pcb design and the (3) rtc-pcf8523 kernel module. Here is why: (Note: this is a technical explanation...
stress-rtc.c stress-schedmix.c stress-schedpolicy.c stress-sctp.c stress-seal.c stress-seccomp.c stress-secretmem.c stress-seek.c stress-sem-sysv.c stress-sem.c stress-sendfile.c stress-session.c stress-set.c stress-shellsort.c stress-shm-sysv.c stress-shm.c stress-sigabrt.c stress-...
[in] Set to IOCTL_HAL_INIT_RTC. Resets the real-time clock by calling OEMSetRealTime.lpInBuf [in] Pointer to the input buffer that contains a SYSTEMTIME structure.nInBufsize [in] Size, in bytes, of lpInBuf. This should be the size of the SYSTEMTIME structure.lp...
...时间 同样使用标准的ioctl 函数: 1 int ioctl(int d, int request, ...); 需要引用头文件: 1 #include ioctl.h> 2 #include...(ioctl(fd, RTC_SET_TIME, &rtc_tm) < 0) { 27 printf("RTC_SET_TIME failed\n"); 28 return -1; 29 } 30 31.../* 获取RTC时间*/ 32 if (ioctl(fd...
示例1: rtc32_ioctl ▲點讚 9▼ staticintrtc32_ioctl(unsignedfd,unsignedcmd,unsignedlongarg){unsignedlongval;mm_segment_toldfs = get_fs();intret;switch(cmd) {caseRTC_IRQP_READ32: set_fs(KERNEL_DS); ret =sys_ioctl(fd, RTC_IRQP_READ, (unsignedlong)&val); ...
* operations set for device object */ struct device_ops_s { int32_t (*open)(device_t *dev); int32_t (*close)(device_t *dev); xssize_t (*read)(device_t *dev, char *buffer, xsize_t size, xloff_t *pos); xssize_t (*write)(device_t *dev, const char *buffer, xsize_t...
FD_SET(fd, &fds);/* Timeout. */tv.tv_sec =2; tv.tv_usec =0; r = select(fd +1, &fds,NULL,NULL, &tv); }while((r ==-1&& (errno = EINTR)));if(r ==-1) { kDebug() <<"select"; quit();return; } CLEAR(buf); ...
TIME UTILS 驱动 驱动框架 Core DriverConfig DriverUtils OSAL HDI Audio Codec Display Format Input 平台 COMMON GPIO I2C RTC SDIO SPI UART WATCHDOG EMMC DSI PWM PanSensor Sensor 模型 WLAN 系统基础能力子系统集 用户程序框架 AbilityKit BundleManager 公共通...