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5fb12ce447
第一套键盘扫描码的状态机 --------- Co-authored-by: guanjinquan <1666320330@qq.com> Co-authored-by: longjin <longjin@RinGoTek.cn>
533 lines
11 KiB
C
533 lines
11 KiB
C
#include "keyboard.h"
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#include <unistd.h>
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// 功能键标志变量
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static bool shift_l = 0, shift_r = 0, ctrl_l = 0, ctrl_r = 0, alt_l = 0, alt_r = 0;
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static bool gui_l = 0, gui_r = 0, apps = 0, insert = 0, home = 0, pgup = 0, del = 0, end = 0, pgdn = 0, arrow_u = 0, arrow_l = 0, arrow_d = 0, arrow_r = 0;
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static bool kp_forward_slash = 0, kp_en = 0;
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// 键盘扫描码有三种：
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// 0xE1开头的PauseBreak键
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// 0xE0开头的功能键
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// 1byte的普通按键
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// pause break键的扫描码，没错，它就是这么长
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unsigned char pause_break_scan_code[] = {0xe1, 0x1d, 0x45, 0xe1, 0x9d, 0xc5};
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// 第一套键盘扫描码 及其对应的字符
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uint32_t keycode_map_normal[NUM_SCAN_CODES * MAP_COLS] =
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{
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/*scan-code unShift Shift */
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/*--------------------------------------------------------------*/
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/*0x00*/ 0,
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0,
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/*0x01*/ 0,
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0, // ESC
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/*0x02*/ '1',
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'!',
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/*0x03*/ '2',
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'@',
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/*0x04*/ '3',
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'#',
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/*0x05*/ '4',
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'$',
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/*0x06*/ '5',
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'%',
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/*0x07*/ '6',
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'^',
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/*0x08*/ '7',
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'&',
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/*0x09*/ '8',
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'*',
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/*0x0a*/ '9',
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'(',
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/*0x0b*/ '0',
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')',
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/*0x0c*/ '-',
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'_',
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/*0x0d*/ '=',
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'+',
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/*0x0e*/ '\b',
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'\b', // BACKSPACE
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/*0x0f*/ '\t',
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'\t', // TAB
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/*0x10*/ 'q',
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'Q',
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/*0x11*/ 'w',
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'W',
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/*0x12*/ 'e',
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'E',
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/*0x13*/ 'r',
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'R',
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/*0x14*/ 't',
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'T',
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/*0x15*/ 'y',
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'Y',
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/*0x16*/ 'u',
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'U',
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/*0x17*/ 'i',
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'I',
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/*0x18*/ 'o',
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'O',
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/*0x19*/ 'p',
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'P',
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/*0x1a*/ '[',
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'{',
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/*0x1b*/ ']',
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'}',
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/*0x1c*/ '\n',
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'\n', // ENTER
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/*0x1d*/ 0x1d,
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0x1d, // CTRL Left
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/*0x1e*/ 'a',
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'A',
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/*0x1f*/ 's',
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'S',
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/*0x20*/ 'd',
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'D',
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/*0x21*/ 'f',
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'F',
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/*0x22*/ 'g',
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'G',
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/*0x23*/ 'h',
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'H',
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/*0x24*/ 'j',
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'J',
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/*0x25*/ 'k',
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'K',
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/*0x26*/ 'l',
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'L',
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/*0x27*/ ';',
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':',
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/*0x28*/ '\'',
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'"',
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/*0x29*/ '`',
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'~',
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/*0x2a*/ 0x2a,
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0x2a, // SHIFT Left
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/*0x2b*/ '\\',
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'|',
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/*0x2c*/ 'z',
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'Z',
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/*0x2d*/ 'x',
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'X',
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/*0x2e*/ 'c',
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'C',
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/*0x2f*/ 'v',
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'V',
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/*0x30*/ 'b',
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'B',
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/*0x31*/ 'n',
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'N',
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/*0x32*/ 'm',
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'M',
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/*0x33*/ ',',
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'<',
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/*0x34*/ '.',
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'>',
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/*0x35*/ '/',
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'?',
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/*0x36*/ 0x36,
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0x36, // SHIFT Right
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/*0x37*/ '*',
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'*',
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/*0x38*/ 0x38,
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0x38, // ALT Left
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/*0x39*/ ' ',
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' ',
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/*0x3a*/ 0,
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0, // CAPS LOCK
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/*0x3b*/ 0,
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0, // F1
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/*0x3c*/ 0,
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0, // F2
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/*0x3d*/ 0,
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0, // F3
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/*0x3e*/ 0,
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0, // F4
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/*0x3f*/ 0,
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0, // F5
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/*0x40*/ 0,
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0, // F6
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/*0x41*/ 0,
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0, // F7
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/*0x42*/ 0,
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0, // F8
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/*0x43*/ 0,
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0, // F9
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/*0x44*/ 0,
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0, // F10
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/*0x45*/ 0,
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0, // NUM LOCK
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/*0x46*/ 0,
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0, // SCROLL LOCK
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/*0x47*/ '7',
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0, /*PAD HONE*/
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/*0x48*/ '8',
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0, /*PAD UP*/
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/*0x49*/ '9',
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0, /*PAD PAGEUP*/
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/*0x4a*/ '-',
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0, /*PAD MINUS*/
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/*0x4b*/ '4',
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0, /*PAD LEFT*/
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/*0x4c*/ '5',
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0, /*PAD MID*/
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/*0x4d*/ '6',
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0, /*PAD RIGHT*/
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/*0x4e*/ '+',
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0, /*PAD PLUS*/
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/*0x4f*/ '1',
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0, /*PAD END*/
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/*0x50*/ '2',
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0, /*PAD DOWN*/
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/*0x51*/ '3',
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0, /*PAD PAGEDOWN*/
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/*0x52*/ '0',
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0, /*PAD INS*/
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/*0x53*/ '.',
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0, /*PAD DOT*/
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/*0x54*/ 0,
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0,
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/*0x55*/ 0,
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0,
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/*0x56*/ 0,
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0,
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/*0x57*/ 0,
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0, // F11
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/*0x58*/ 0,
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0, // F12
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/*0x59*/ 0,
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0,
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/*0x5a*/ 0,
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0,
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/*0x5b*/ 0,
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0,
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/*0x5c*/ 0,
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0,
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/*0x5d*/ 0,
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0,
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/*0x5e*/ 0,
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0,
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/*0x5f*/ 0,
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0,
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/*0x60*/ 0,
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0,
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/*0x61*/ 0,
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0,
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/*0x62*/ 0,
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0,
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/*0x63*/ 0,
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0,
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/*0x64*/ 0,
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0,
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/*0x65*/ 0,
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0,
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/*0x66*/ 0,
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0,
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/*0x67*/ 0,
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0,
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/*0x68*/ 0,
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0,
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/*0x69*/ 0,
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0,
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/*0x6a*/ 0,
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0,
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/*0x6b*/ 0,
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0,
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/*0x6c*/ 0,
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0,
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/*0x6d*/ 0,
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0,
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/*0x6e*/ 0,
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0,
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/*0x6f*/ 0,
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0,
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/*0x70*/ 0,
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0,
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/*0x71*/ 0,
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0,
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/*0x72*/ 0,
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0,
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/*0x73*/ 0,
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0,
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/*0x74*/ 0,
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0,
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/*0x75*/ 0,
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0,
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/*0x76*/ 0,
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0,
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/*0x77*/ 0,
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0,
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/*0x78*/ 0,
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0,
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/*0x79*/ 0,
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0,
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/*0x7a*/ 0,
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0,
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/*0x7b*/ 0,
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0,
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/*0x7c*/ 0,
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0,
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/*0x7d*/ 0,
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0,
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/*0x7e*/ 0,
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0,
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/*0x7f*/ 0,
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0,
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};
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/**
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* @brief 解析键盘扫描码
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*
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*/
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int keyboard_analyze_keycode(int fd)
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{
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bool flag_make = false;
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int c = keyboard_get_scancode(fd);
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// 循环队列为空
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if (c == -1)
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return 0;
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unsigned char scancode = (unsigned char)c;
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int key = 0;
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if (scancode == 0xE1) // Pause Break
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{
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key = PAUSE_BREAK;
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// 清除缓冲区中剩下的扫描码
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for (int i = 1; i < 6; ++i)
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if (keyboard_get_scancode(fd) != pause_break_scan_code[i])
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{
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key = 0;
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break;
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}
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}
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else if (scancode == 0xE0) // 功能键, 有多个扫描码
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{
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// 获取下一个扫描码
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scancode = keyboard_get_scancode(fd);
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switch (scancode)
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{
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case 0x2a: // print screen 按键被按下
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if (keyboard_get_scancode(fd) == 0xe0)
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if (keyboard_get_scancode(fd) == 0x37)
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{
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key = PRINT_SCREEN;
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flag_make = true;
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}
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break;
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case 0xb7: // print screen 按键被松开
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if (keyboard_get_scancode(fd) == 0xe0)
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if (keyboard_get_scancode(fd) == 0xaa)
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{
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key = PRINT_SCREEN;
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flag_make = false;
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}
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break;
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case 0x1d: // 按下右边的ctrl
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ctrl_r = true;
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key = OTHER_KEY;
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break;
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case 0x9d: // 松开右边的ctrl
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ctrl_r = false;
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key = OTHER_KEY;
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break;
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case 0x38: // 按下右边的alt
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alt_r = true;
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key = OTHER_KEY;
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break;
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case 0xb8: // 松开右边的alt
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alt_r = false;
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key = OTHER_KEY;
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break;
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case 0x5b:
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gui_l = true;
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key = OTHER_KEY;
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break;
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case 0xdb:
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gui_l = false;
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key = OTHER_KEY;
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break;
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case 0x5c:
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gui_r = true;
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key = OTHER_KEY;
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break;
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case 0xdc:
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gui_r = false;
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key = OTHER_KEY;
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break;
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case 0x5d:
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apps = true;
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key = OTHER_KEY;
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break;
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case 0xdd:
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apps = false;
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key = OTHER_KEY;
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break;
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case 0x52:
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insert = true;
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key = OTHER_KEY;
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break;
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case 0xd2:
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insert = false;
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key = OTHER_KEY;
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break;
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case 0x47:
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home = true;
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key = OTHER_KEY;
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break;
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case 0xc7:
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home = false;
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key = OTHER_KEY;
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break;
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case 0x49:
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pgup = true;
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key = OTHER_KEY;
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break;
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case 0xc9:
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pgup = false;
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key = OTHER_KEY;
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break;
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case 0x53:
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del = true;
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key = OTHER_KEY;
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break;
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case 0xd3:
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del = false;
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key = OTHER_KEY;
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break;
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case 0x4f:
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end = true;
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key = OTHER_KEY;
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break;
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case 0xcf:
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end = false;
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key = OTHER_KEY;
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break;
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case 0x51:
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pgdn = true;
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key = OTHER_KEY;
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break;
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case 0xd1:
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pgdn = false;
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key = OTHER_KEY;
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break;
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case 0x48:
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arrow_u = true;
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key = OTHER_KEY;
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break;
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case 0xc8:
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arrow_u = false;
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key = OTHER_KEY;
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return 0xc8;
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break;
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case 0x4b:
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arrow_l = true;
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key = OTHER_KEY;
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break;
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case 0xcb:
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arrow_l = false;
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key = OTHER_KEY;
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break;
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case 0x50:
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arrow_d = true;
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key = OTHER_KEY;
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return 0x50;
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break;
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case 0xd0:
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arrow_d = false;
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key = OTHER_KEY;
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break;
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case 0x4d:
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arrow_r = true;
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key = OTHER_KEY;
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break;
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case 0xcd:
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arrow_r = false;
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key = OTHER_KEY;
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break;
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case 0x35: // 数字小键盘的 / 符号
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kp_forward_slash = true;
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key = OTHER_KEY;
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break;
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case 0xb5:
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kp_forward_slash = false;
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key = OTHER_KEY;
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break;
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case 0x1c:
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kp_en = true;
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key = OTHER_KEY;
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break;
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case 0x9c:
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kp_en = false;
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key = OTHER_KEY;
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break;
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default:
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key = OTHER_KEY;
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break;
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}
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}
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if (key == 0) // 属于第三类扫描码
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{
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// 判断按键是被按下还是抬起
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flag_make = ((scancode & FLAG_BREAK) ? 0 : 1);
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// 计算扫描码位于码表的第几行
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uint32_t *key_row = &keycode_map_normal[(scancode & 0x7f) * MAP_COLS];
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unsigned char col = 0;
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// shift被按下
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if (shift_l || shift_r)
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col = 1;
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key = key_row[col];
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switch (scancode & 0x7f)
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{
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case 0x2a:
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shift_l = flag_make;
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key = 0;
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break;
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case 0x36:
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shift_r = flag_make;
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key = 0;
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break;
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case 0x1d:
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ctrl_l = flag_make;
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key = 0;
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break;
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case 0x38:
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ctrl_r = flag_make;
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key = 0;
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break;
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default:
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if (!flag_make)
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key = 0;
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break;
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}
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if (key)
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return key;
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}
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return 0;
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}
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/**
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* @brief 从键盘设备文件中获取键盘扫描码
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*
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*/
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int keyboard_get_scancode(int fd)
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{
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unsigned int ret = 0;
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read(fd, &ret, 1);
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return ret;
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} |