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102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
#include <string.h>
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#include <ctype.h>
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#include "ti84_kbd.h"
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void kbd_init(KBD *kbd)
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{
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memset(kbd->pressed, 0xff, 8);
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kbd->selected = 0xff;
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}
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uint8_t kbd_rd(KBD *kbd)
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{
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uint8_t res = 0xff;
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for (int i=0; i<8; i++) {
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if ((kbd->selected & (1<<i)) == 0) {
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res &= kbd->pressed[i];
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}
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}
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return res;
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}
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void kbd_wr(KBD *kbd, uint8_t val)
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{
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kbd->selected = val;
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}
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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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{
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uint8_t group = kbd->pressed[key>>4];
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if (pressed) {
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group &= ~(1<<(key&0x7));
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} else {
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group |= 1<<(key&0x7);
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}
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kbd->pressed[key>>4] = group;
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}
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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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{
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c = toupper(c);
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switch (c) {
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case 0x0a:
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case 0x0d: return 0x10; // ENTER
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case '+': return 0x11;
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case '-': return 0x12;
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case '*': return 0x13;
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case '/': return 0x14;
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case '^': return 0x15;
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case '3': return 0x21;
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case '6': return 0x22;
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case '9': return 0x23;
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case ')': return 0x24;
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case '.': return 0x30;
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case '2': return 0x31;
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case '5': return 0x32;
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case '8': return 0x33;
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case '(': return 0x34;
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case '0': return 0x40;
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case '1': return 0x41;
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case '4': return 0x42;
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case '7': return 0x43;
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case ',': return 0x44;
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case 0x7f: return 0x67; // DEL
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case '"': return 0x11;
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case 'W': return 0x12;
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case 'R': return 0x13;
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case 'M': return 0x14;
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case 'H': return 0x15;
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case '?': return 0x20;
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case 'V': return 0x22;
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case 'Q': return 0x23;
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case 'L': return 0x24;
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case 'G': return 0x25;
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case ':': return 0x30;
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case 'Z': return 0x31;
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case 'U': return 0x32;
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case 'P': return 0x33;
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case 'K': return 0x34;
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case 'F': return 0x35;
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case 'C': return 0x36;
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case ' ': return 0x40;
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case 'Y': return 0x41;
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case 'T': return 0x42;
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case 'O': return 0x43;
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case 'J': return 0x44;
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case 'E': return 0x45;
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case 'B': return 0x46;
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case 'X': return 0x51;
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case 'S': return 0x52;
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case 'N': return 0x53;
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case 'I': return 0x54;
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case 'D': return 0x55;
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case 'A': return 0x56;
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default: return 0;
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}
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}
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