| 278 | #define ALTGR 0x10 |
| 279 | |
| 280 | static char get_iso8859_code(void) |
| 281 | { |
| 282 | static uint8_t state=0; |
| 283 | uint8_t s; |
| 284 | char c; |
| 285 | |
| 286 | while (1) { |
| 287 | s = get_scan_code(); |
| 288 | if (!s) return 0; |
| 289 | if (s == 0xF0) { |
| 290 | state |= BREAK; |
| 291 | } else if (s == 0xE0) { |
| 292 | state |= MODIFIER; |
| 293 | } else { |
| 294 | if (state & BREAK) { |
| 295 | if (s == 0x12) { |
| 296 | state &= ~SHIFT_L; |
| 297 | } else if (s == 0x59) { |
| 298 | state &= ~SHIFT_R; |
| 299 | } else if (s == 0x11 && (state & MODIFIER)) { |
| 300 | state &= ~ALTGR; |
| 301 | } |
| 302 | // CTRL, ALT & WIN keys could be added |
| 303 | // but is that really worth the overhead? |
| 304 | state &= ~(BREAK | MODIFIER); |
| 305 | continue; |
| 306 | } |
| 307 | if (s == 0x12) { |
| 308 | state |= SHIFT_L; |
| 309 | continue; |
| 310 | } else if (s == 0x59) { |
| 311 | state |= SHIFT_R; |
| 312 | continue; |
| 313 | } else if (s == 0x11 && (state & MODIFIER)) { |
| 314 | state |= ALTGR; |
| 315 | } |
| 316 | c = 0; |
| 317 | if (state & MODIFIER) { |
| 318 | switch (s) { |
| 319 | case 0x70: c = PS2_INSERT; break; |
| 320 | case 0x6C: c = PS2_HOME; break; |
| 321 | case 0x7D: c = PS2_PAGEUP; break; |
| 322 | case 0x71: c = PS2_DELETE; break; |
| 323 | case 0x69: c = PS2_END; break; |
| 324 | case 0x7A: c = PS2_PAGEDOWN; break; |
| 325 | case 0x75: c = PS2_UPARROW; break; |
| 326 | case 0x6B: c = PS2_LEFTARROW; break; |
| 327 | case 0x72: c = PS2_DOWNARROW; break; |
| 328 | case 0x74: c = PS2_RIGHTARROW; break; |
| 329 | case 0x4A: c = '/'; break; |
| 330 | case 0x5A: c = PS2_ENTER; break; |
| 331 | default: break; |
| 332 | } |
| 333 | } else if ((state & ALTGR) && keymap->uses_altgr) { |
| 334 | if (s < PS2_KEYMAP_SIZE) |
| 335 | c = pgm_read_byte(keymap->altgr + s); |
| 336 | } else if (state & (SHIFT_L | SHIFT_R)) { |
| 337 | if (s < PS2_KEYMAP_SIZE) |
no test coverage detected