这可以通过ioctl系统调用和GPIO_GET_LINEHANDLE_IOCTL命令来实现。例如,要导出GPIO8,可以使用以下代码: #include<linux/gpio.h>#include<sys/ioctl.h>structgpiohandle_requestreq;req.lineoffsets[0]=8;req.lines=1;req.flags=GPIOHANDLE_REQUEST_OUTPUT;strcpy(req.consumer_label,"my_gpio");if(ioctl(gpio_f...
ioctl(fd,GPIO_GET_LINEHANDLE_IOCTL,&req);if (close(fd) == -1)perror("关闭设备失败 ");retu...
intlhfd=ioctl(fd, GPIO_GET_LINEHANDLE_IOCTL,&req); if(lhfd<0) { printf("ERROR get line handle lhdf=%d\n", lhfd); return-1; } data.values[0]=1; ret=ioctl(req.fd, GPIOHANDLE_SET_LINE_VALUES_IOCTL,&data); if(ret<0) { ...
GPIO_GET_LINEINFO_IOCTL gpio: userspace ABI for reading/writing GPIO lines commit:d7c51b47ac11e [GIT PULL] bulk GPIO changes for v4.8(Jul 25, 2016) ioctl GPIOHANDLE_GET_LINE_VALUES_IOCTL GPIOHANDLE_SET_LINE_VALUES_IOCTL GPIO_GET_LINEHANDLE_IOCTL gpio: userspace ABI for reading GPIO lin...
GET_CHIPINFO_IOCTL 2151986177//_IOR(0xB4, 0x01, struct gpiochip_info)64#defineGPIO_GET_LINEINFO_IOCTL 3225990146//_IOWR(0xB4, 0x02, struct gpioline_info)65#defineGPIO_GET_LINEHANDLE_IOCTL 3245126659//_IOWR(0xB4, 0x03, struct gpiohandle_request)6667#defineGPIOHANDLE_GET_LINE_VALUES_IOCTL ...
int fd; //设备描述符,即库中底层使用ioctl打开的gpio芯片设备节点的描述符 char name[32]; //芯片的名称 char label[32]; //芯片的标签 }; 1. 2. 3. 4. 5. 6. 7. 8. 9. 【2】struct gpiod_line struct gpiod_line { unsigned int offset; //gpio 的偏移量,如GPIO05_IO09 偏移 9 ...
处理IOCTL_GPIO_COMMIT_FUNCTION_CONFIG_PINS 请求 客户端通过打开句柄成功保留 MsftFunctionConfig 资源后,可以发送 IOCTL_GPIO_COMMIT_FUNCTION_CONFIG_PINS 以请求服务器执行实际的硬件复用操作。 当服务器收到 IOCTL_GPIO_COMMIT_FUNCTION_CONFIG_PINS 时,对于引脚列表中的每个引脚,它应该 将PNP_FUNCTION_CONFIG_DESCR...
gpiohandle_request req; req.lineoffsets[0] = gpio_num; req.flags = GPIOHANDLE_REQUEST_OUTPUT; req.default_values[0] = 0; // 初始值为低电平 int ret = ioctl(gpio_fd, GPIOGETLINEHANDLE_IOCTL, &req); if (ret < 0) { perror("Failed to get GPIO line handle"); close(gpio_fd); ...
处理IOCTL_GPIO_COMMIT_FUNCTION_CONFIG_PINS 请求 客户端通过打开句柄成功保留 MsftFunctionConfig 资源后,可以发送 IOCTL_GPIO_COMMIT_FUNCTION_CONFIG_PINS 以请求服务器执行实际的硬件复用操作。 当服务器收到 IOCTL_GPIO_COMMIT_FUNCTION_CONFIG_PINS 时,对于引脚列表中的每个引脚,它应该 将PNP_FUNCTION_CONFIG_DESCR...
GpioGetDir() GpioRead() GpioSetDir() GpioSetIrq() GpioUnSetIrq() GpioWrite() 展开章节 Overview Description: Provides standard general-purpose input/output (GPIO) interfaces for driver development. You can use this module to perform operations on a GPIO pin, including setting the input/outpu...