一、准备工作
二、编译代码
三、测试

8.KEYSCAN矩阵键盘扫描测试

该教程演示如何通过两块开发板实现KEYSCAN矩阵键盘扫描测试

一、准备工作

准备1块BearPi-Pico H2821开发板

二、编译代码

在Windows下编译操作

点击左侧的“KConfig”,打开配置界面.

选择Support KEYSCAN Sample.

[*] Enable Sample.
[*]     Enable the Sample of peripheral.
[ ]         Enable all the sample of peripheral, it's just for build.
[ ]         Support ADC Sample.
[ ]         Support BLINKY Sample.
[ ]         Support BUTTON Sample.
[ ]         Support DMA Sample.
[ ]         Support I2C Sample.
[ ]         Support I2S Sample.
[*]         Support KEYSCAN Sample.

按下"Save"键保存配置。
可自行修改行列对应的GPIO以及键值
编译烧录固件
参考环境搭建教程编译烧录代码

在Ubuntu下编译操作

在MobaXterm中输入:
```
./build.py menuconfig
```

选择Support KEYSCAN Sample.

[*] Enable Sample.
[*]     Enable the Sample of peripheral.
[ ]         Enable all the sample of peripheral, it's just for build.
[ ]         Support ADC Sample.
[ ]         Support BLINKY Sample.
[ ]         Support BUTTON Sample.
[ ]         Support DMA Sample.
[ ]         Support I2C Sample.
[ ]         Support I2S Sample.
[*]         Support KEYSCAN Sample.

按下"ESC"键退出并保存配置。
可自行修改行列对应的GPIO以及键值
编译烧录固件
参考环境搭建教程编译烧录代码

三、测试

烧录固件后按下开发的复位按键，任意行GPIO和列GPIO短接，串口日志中会打印对应的键值，当键值为0时不会打印。

keyscan register callback start!
keyscan register callback succ!
keyscan enable start!
keyscan enable start succ!
[pm_sys]pm_sys_entry.
KEY val: 0x29
KEY val: 0x2B
KEY val: 0x14
KEY val: 0x35
KEY val: 0x04