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making keyboard driver spin by checking if scanbyte has changed rather than by a decrement loop

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This commit is contained in:
Benji Dial 2021-01-24 19:45:53 -05:00
parent bce944d149
commit 782cfaa0e3
1 changed files with 8 additions and 3 deletions
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11
src/kernel/kbd.c
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@ -78,11 +78,15 @@ void init_kbd() {
drives->free_file(drives, stf);
}
static uint8_t last_code_byte = 0;
static inline uint8_t get_next_code_byte() {
for (uint32_t spin = 0; spin < 10000000; ++spin)
;
return inb(PS2_DATA);
uint8_t cb;
do
cb = inb(PS2_DATA);
while (cb == last_code_byte);
last_code_byte = cb;
return cb;
}
static enum key_modifiers_t keymods = 0;
@ -90,6 +94,7 @@ static enum key_modifiers_t keymods = 0;
void on_kbd_isr() {
//logf(LOG_INFO, "on_kbd_isr()");
while (inb(PS2_CMD) & PS2S_CODE_READY) {
last_code_byte = 0;
uint8_t code[256];
uint8_t code_i = 0;
sub_table: