[Raspberry Pi Pico Review] How to use the buttons

jinglixixi

[Raspberry Pi Pico Review] How to use the buttons [Copy link]

A button is a commonly used input device, and its usage is divided into two categories, namely query mode and interrupt mode.

Since the small Raspberry Pi development board does not have any buttons for users to use, a touch button at hand is used. The connection method is shown in Figure 1.

Figure 1 Button connection diagram

1. Interrupt mode

In order to verify the interrupt mode, the print statement can be called in interrupt mode to output the corresponding information when the key is touched. The program content and running results are shown in Figure 2.

Figure 2 Program and running results

2. Query method

In the query mode, the corresponding output can be controlled by using the keys. The program content and running results are shown in Figures 3 and 4.

Figure 3 Program content

Figure 4: Operation results

Jacktang

After learning how to use the buttons, what are you going to play next?

jinglixixi

Jacktang posted on 2021-4-15 21:26After finishing the use of the buttons, what are you going to play next?

I'm working on an OLED screen display, but it doesn't seem to work because I'm missing the corresponding library file. If possible, I'd like to write a function myself to make one.

soso

Small button with big use, good, good

jinglixixi

soso posted on 2021-4-16 09:17 Small button with big uses, not bad

Indeed, there is no detailed introduction in the relevant tutorials.

dql2016

You have so many modules.

jinglixixi

dql2016 posted on 2021-4-16 21:06 You have so many modules

They are all small toys, and some higher-end ones will be placed in the back.