补充 menuconfig 配置.

Signed-off-by: ithink.chan <chenyang@autoai.com>
2020-04-28 17:48:38 +08:00 · 2020-04-28 17:48:38 +08:00 · a4d8b0a406
commit a4d8b0a406
parent 397923da21
1 changed files with 6 additions and 0 deletions
--- a/Software/Development/OperatingSystem/Linux/User/Modules/GPIO/用户态_GPIO_操作指南.md
+++ b/Software/Development/OperatingSystem/Linux/User/Modules/GPIO/用户态_GPIO_操作指南.md
@ -1,5 +1,11 @@
 # 用户态 GPIO 操作指南

+首先，看看系统中有没有“/sys/class/gpio”这个文件夹。如果没有请在编译内核 make menuconfig 的时候加入：
+
+```sh
+Device Drivers-> GPIO Support ->/sys/class/gpio/… (sysfs interface)
+```
+
 ## 获取 GPIO 范围

 ### 通过 kernel debug 获取