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26 lines
798 B
C
26 lines
798 B
C
#include <stdint.h>
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#include <stdbool.h>
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// These are keycodes for special keys
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#define KBD_ALPHA 0x57
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#define KBD_2ND 0x65
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// NOTE: We don't manage the ON key here.
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typedef struct {
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// Bitmask of pressed keys. Like on real hardware, 0xff means nothing
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// pressed. The group 7 has no key, but for code simplicity, we have a neat
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// array of 8 bytes.
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uint8_t pressed[8];
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// Selected groups. Active low.
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uint8_t selected;
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} KBD;
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void kbd_init(KBD *kbd);
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uint8_t kbd_rd(KBD *kbd);
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void kbd_wr(KBD *kbd, uint8_t val);
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// The key is separated in two nibble. High nibble is group, low nibble is key.
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void kbd_setkey(KBD *kbd, uint8_t key, bool pressed);
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// Attempts to returns a key code corresponding to the specified char. 0 if
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// nothing matches.
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uint8_t kbd_trans(char c);
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