HCIA Notes - --ACL Access Control List

ACL Access Control List Functions: 1. Access Restrictions - Match traffic on router traffic-in or-out interfaces and then restrict them 2. Define traffic of interest Introduction to ACL: 1. From top to bottom, match one by one, the previous match is executed as above, not the next 2. Calls to the ACL list are divided into in (matching the ...

Added by RedDragon on Sun, 19 Sep 2021 22:31:59 +0300

Raspberry pie GPIO operation based on python: input and output, interrupt, serial port, PWM, basic operation

        First, learn about the GPIO distribution of raspberry pie. You can get the GPIO distribution by entering gpio readall.             The error of Oops - unable to determine board type... model: 17 may be due to the version of wiringPi, Enter the following command to upgrade the wiringPi v ...

Added by xxxxxx on Sat, 18 Sep 2021 17:41:15 +0300

LED for driving frame

1, What is a drive frame 1. Who wrote the driver (1) Drive development engineer (2) Kernel maintainer 2. Driver programming collaboration requirements (1) The interface should be standardized. Don't make a mess. There are several sets of interfaces (2) Minimize the difficulty of driving developers 3. What is the driver framework (1) The ...

Added by Spitfire on Wed, 15 Sep 2021 01:29:51 +0300

Understanding and application of STM32 ADC

preface ADC is widely used in the project. ADC and DAC are digital / analog converters. But I don't use much DAC, because I usually use sensors to detect external analog quantities, and then convert them into digital quantities for data processing and application, such as temperature and humidity sensors, inductors, black-and-white tra ...

Added by cfemocha on Wed, 08 Sep 2021 20:11:13 +0300