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Added backspace fix and caps using shift

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ErrorTP 2022-12-04 09:51:14 -05:00 committed by GitHub
parent 8c58d5f63b
commit f6cd08f822
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1 changed files with 17 additions and 8 deletions
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25
21-shell/drivers/keyboard.c
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@ -8,7 +8,9 @@
#define BACKSPACE 0x0E
#define ENTER 0x1C
#define LSHIFT_DOWN 0x2a
#define LSHIFT_UP 0xaa
int caps = 0;
static char key_buffer[256];
#define SC_MAX 57
@ -19,26 +21,33 @@ const char *sc_name[] = { "ERROR", "Esc", "1", "2", "3", "4", "5", "6",
"LShift", "\\", "Z", "X", "C", "V", "B", "N", "M", ",", ".",
"/", "RShift", "Keypad *", "LAlt", "Spacebar"};
const char sc_ascii[] = { '?', '?', '1', '2', '3', '4', '5', '6',
'7', '8', '9', '0', '-', '=', '?', '?', 'Q', 'W', 'E', 'R', 'T', 'Y',
'U', 'I', 'O', 'P', '[', ']', '?', '?', 'A', 'S', 'D', 'F', 'G',
'H', 'J', 'K', 'L', ';', '\'', '`', '?', '\\', 'Z', 'X', 'C', 'V',
'B', 'N', 'M', ',', '.', '/', '?', '?', '?', ' '};
'7', '8', '9', '0', '-', '=', '?', '?', 'q', 'w', 'e', 'r', 't', 'y',
'u', 'i', 'o', 'p', '[', ']', '?', '?', 'a', 's', 'd', 'f', 'g',
'h', 'j', 'k', 'l', ';', '\'', '`', '?', '\\', 'z', 'x', 'c', 'v',
'b', 'n', 'm', ',', '.', '/', '?', '?', '?', ' '};
static void keyboard_callback(registers_t regs) {
/* The PIC leaves us the scancode in port 0x60 */
u8 scancode = port_byte_in(0x60);
if (scancode == LSHIFT_UP){caps=0;}
if (scancode > SC_MAX) return;
if (scancode == BACKSPACE) {
backspace(key_buffer);
kprint_backspace();
if (key_buffer[0] != '\0') {
backspace(key_buffer);
kprint_backspace();
}
} else if (scancode == ENTER) {
kprint("\n");
user_input(key_buffer); /* kernel-controlled function */
key_buffer[0] = '\0';
}else if (scancode == LSHIFT_DOWN) {
if (caps == 0) {
caps++;
}
} else {
char letter = sc_ascii[(int)scancode];
/* Remember that kprint only accepts char[] */
if (caps == 1) {letter = chrupper(letter)};
char str[2] = {letter, '\0'};
append(key_buffer, letter);
kprint(str);