我要和一个司机约会。有以下几种说法:
/* Get the interrupt GPIO pin number */
gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN);
我读过关于的文章,但我仍然不知道到底返回了什么?
我知道gpiod_direction_output返回一个struct gpio_desc。但是devm_gpiod_get_optional的情况似乎并非如此,因为我尝试过在每个示例中打印gpiod->label,并且得到了dereferencing pointer to incom
正在尝试编译用于usb-音频卡Line6 UX2的linux核心模块。从repo获取代码并尝试制作。存储库没有./配置 生成错误: line6linux-code-r1108/driver/trunk/driver.c:169:2: error: implicit declaration of function ‘setup_timer’; did you mean ‘del_timer’? [-Werror=implicit-function-declaration]
setup_timer(timer, function, data);
^~~~~~~~~~~
del_tim
我在i2c线路上将一个硬件连接到一个嵌入式linux板上。我可以在/dev/i2c-1上看到这个设备
filename = "/dev/i2c-1"
filehandle = open(filename,O_RDWR);
write(filehandle, <buffer to be written>, <number of Bytes>)
(similiarly for read = read(filehandle, <buffer to be read in an array>, <number of