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collapseos/emul/hw/ti/kbd.c

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#include <string.h>
#include <ctype.h>
#include "kbd.h"
void kbd_init(KBD *kbd)
{
memset(kbd->pressed, 0xff, 8);
kbd->selected = 0xff;
}
uint8_t kbd_rd(KBD *kbd)
{
uint8_t res = 0xff;
for (int i=0; i<8; i++) {
if ((kbd->selected & (1<<i)) == 0) {
res &= kbd->pressed[i];
}
}
return res;
}
void kbd_wr(KBD *kbd, uint8_t val)
{
kbd->selected = val;
}
// The key is separated in two nibble. High nibble is group, low nibble is key.
void kbd_setkey(KBD *kbd, uint8_t key, bool pressed)
{
uint8_t group = kbd->pressed[key>>4];
if (pressed) {
group &= ~(1<<(key&0x7));
} else {
group |= 1<<(key&0x7);
}
kbd->pressed[key>>4] = group;
}
// Attempts to returns a key code corresponding to the specified char. 0 if
// nothing matches.
uint8_t kbd_trans(char c)
{
c = toupper(c);
switch (c) {
case 0x0a:
case 0x0d: return 0x10; // ENTER
case '+': return 0x11;
case '-': return 0x12;
case '*': return 0x13;
case '/': return 0x14;
case '^': return 0x15;
case '3': return 0x21;
case '6': return 0x22;
case '9': return 0x23;
case ')': return 0x24;
case '.': return 0x30;
case '2': return 0x31;
case '5': return 0x32;
case '8': return 0x33;
case '(': return 0x34;
case '0': return 0x40;
case '1': return 0x41;
case '4': return 0x42;
case '7': return 0x43;
case ',': return 0x44;
case 0x7f: return 0x67; // DEL
case '"': return 0x11;
case 'W': return 0x12;
case 'R': return 0x13;
case 'M': return 0x14;
case 'H': return 0x15;
case '?': return 0x20;
case 'V': return 0x22;
case 'Q': return 0x23;
case 'L': return 0x24;
case 'G': return 0x25;
case ':': return 0x30;
case 'Z': return 0x31;
case 'U': return 0x32;
case 'P': return 0x33;
case 'K': return 0x34;
case 'F': return 0x35;
case 'C': return 0x36;
case ' ': return 0x40;
case 'Y': return 0x41;
case 'T': return 0x42;
case 'O': return 0x43;
case 'J': return 0x44;
case 'E': return 0x45;
case 'B': return 0x46;
case 'X': return 0x51;
case 'S': return 0x52;
case 'N': return 0x53;
case 'I': return 0x54;
case 'D': return 0x55;
case 'A': return 0x56;
default: return 0;
}
}