12/17/2022 0 Comments Bcm numbering raspberry pi 3![]() ![]() The second argument configures the pin as an input or an output – whether the pin is "listening" or "talking." GPIO.OUT configures a pin as an output. This relies on the number mode you decided on earlier. The first argument is the pin number you want to set up. The tup function accepts three arguments. When you start using special features of the processor (UART, SPI, I2C), they are connected to actual processor pins, so using BCM numbering makes more sense. Why use BCM numbering over BOARD numbering? In this project, it would work just fine either way. These numbers will remain the same until the physical layout of the Raspberry Pi changes. īOARD refers to the pin numbers of the GPIO header itself. To see where you're connecting, you have to refer to a datasheet for the specific model of Raspberry Pi that your project uses. BCM refers to the pin numbers on the processor itself. ![]() You have two numbering methods on the Raspberry Pi: GPIO.BCM and GPIO.BOARD. The tmode function configures the library to use the appropriate GPIO number to physical pin mapping. A name like RPi.GPIO isn't too bad, but when the library is something like .sample.load, it's extremely handy! Raspberry Pi GPIO Setup – Lines 5 to 10 Without the as keyword, I would have to use the full library name every time I referenced it. ![]() Line 3 uses the as keyword to reference a library by a different name. The import command is Python's directive to reference a library or external Python file. ![]()
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