{"id":1915,"date":"2022-03-11T10:44:20","date_gmt":"2022-03-11T10:44:20","guid":{"rendered":"https:\/\/picockpit.com\/raspberry-pi\/?p=1915"},"modified":"2023-09-18T13:59:40","modified_gmt":"2023-09-18T13:59:40","slug":"beginner-gpio-guide","status":"publish","type":"post","link":"https:\/\/picockpit.com\/raspberry-pi\/zh\/%e5%88%9d%e5%ad%a6%e8%80%85-gpio%e6%8c%87%e5%8d%97\/","title":{"rendered":"GPIO \u5165\u95e8\u6307\u5357"},"content":{"rendered":"\n
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In this blog post you will learn everything about the GPIO pins of the Raspberry Pi. This post is especially for newbies in electronics.<\/p>\n\n\n\n

First of all, a warning:
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The Raspberry Pi can be irreparably damaged if the pins are used incorrectly. So always make sure your circuit is correct and that you use enough resistors.<\/strong><\/p>\n\n\n\n

What are GPIO pins<\/h2>\n\n\n\n

The GPIO pins are the 40 small metal pins on the top of the Raspberry Pi. The abbreviation GPIO stands for general purpose input output. This means that the GPIO pins can be used as an interface for almost any electronic device.<\/p>\n\n\n\n

Due to the large number of ways to (mis)use the pins, getting started can be a bit confusing. Therefore, this blog post provides some examples on how to control the pins using Bash, C, and Python. So a little experience in programming is an advantage.<\/p>\n\n\n\n

Although the 40 pins look identical, they have different functions. 26 pins can be used for GPIO and some have additional functions. Another 4 pins are used as power source (POWER, two times 3V3 and two times 5V) and 8 as negative pole (also ground or GROUND). The two remaining pins are the I2C interface for ID EEPROM.<\/p>\n\n\n\n

Pinout<\/h2>\n\n\n\n

The graphic below shows the most important information, among other things the pinout. The pinout is identical for most Raspberry Pi models, but there are differences. Always check the exact pinout of your model before connecting a device. For this you just have to open a terminal on your Raspberry Pi (Ctrl+Alt+t) and execute the following command.<\/p>\n\n\n\n

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pinout<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
You will see a graphic of all connections and the exact pinout of your Raspberry Pi.<\/p>\n\n\n
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You may have noticed that the GPIO numbers appear randomly and do not match the pin numbering. To avoid confusion, I refer to the numbering from 1 to 40 as the BOARD number and the number from 1 to 26 as the BCM or GPIO number.<\/p>\n\n\n\n
So BOARD pin 1 is the 3V3 POWER connector and GPIO pin 2 is the pin next to it with BOARD number 3.<\/p>\n\n\n\n
How to connect a device to the pins<\/h2>\n\n\n\n
There are several alternatives to connect a device to the GPIO pins. Some devices have a GPIO header so that the device can be plugged directly into the GPIO pins. Generally, however, this is not the case, which is why jumper wires or GPIO extension cables are used.<\/p>\n\n\n\n
Watch our Video<\/a> about GPIO Pins!<\/p>\n\n\n\n
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