os_kernel/device/keyboard.c

#include "keyboard.h"
#include "../kernel/global.h"
#include "stdint.h"
#include "../lib/kernel/io.h"
#include "../lib/kernel/print.h"
#include "../kernel/interrupt.h"

// 键盘中断处理程序
static void intr_keyboard_handler(void);

void keyboard_init(void)
{
    put_str("keyboard init start\n");
    // todo: 1. 打开 8042 键盘控制器

    // 2. 注册键盘中断处理程序
    register_handler(0x21, intr_keyboard_handler);
    put_str("keyboard init done\n");
    return;
}

// 键盘中断处理程序
static void intr_keyboard_handler(void)
{
    uint8_t scancode = inb(KBD_DATA_PORT); // 必须要读取输出缓冲寄存器，否则 8042 不再继续响应键盘中断
    put_int(scancode);
    put_char(' ');
    return;
}