7 #include <util/delay.h>
15 #if (MATRIX_COLS > 16)
16 # error "MATRIX_COLS must not exceed 16"
18 #if (MATRIX_ROWS > 255)
19 # error "MATRIX_ROWS must not exceed 255"
25 * "PS/2 Scan Codes Set 2" is assigned to 256(32x8)cells matrix.
26 * Hmm, It is very sparse and not efficient :(
31 * :| XX | 00-7F for normal codes(without E0-prefix)
34 * :| E0 XX | 80-FF for E0-prefix codes(use (XX|0x80) as code)
38 * 83: F8[0x83](normal codes but > 0x7F)
39 * FC: PrintScreen[E0 7C or 84]
43 #define PRINT_SCREEN (0xFC)
45 #define ROW(code) (code>>3)
46 #define COL(code) (code&0x07)
48 static bool is_modified = false;
50 // matrix state buffer(1:on, 0:off)
51 #if (MATRIX_COLS <= 8)
52 static uint8_t matrix[MATRIX_ROWS];
54 static uint16_t matrix[MATRIX_ROWS];
57 #ifdef MATRIX_HAS_GHOST
58 static bool matrix_has_ghost_in_row(uint8_t row);
60 static void matrix_make(uint8_t code);
61 static void matrix_break(uint8_t code);
65 uint8_t matrix_rows(void)
71 uint8_t matrix_cols(void)
76 void matrix_init(void)
80 // initialize matrix state: all keys off
81 for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
87 * PS/2 Scan Code Set 2: Exceptional Handling
89 * There are several keys to be handled exceptionally.
90 * The scan code for these keys are varied or prefix/postfix'd
91 * depending on modifier key state.
94 * http://www.microsoft.com/whdc/archive/scancode.mspx
95 * http://download.microsoft.com/download/1/6/1/161ba512-40e2-4cc9-843a-923143f3456c/scancode.doc
98 * Insert, Delete, Home, End, PageUp, PageDown, Up, Down, Right, Left:
100 * modifiers | make | break
101 * ----------+---------------------------+----------------------
102 * Ohter | <make> | <break>
103 * LShift | E0 F0 12 <make> | <break> E0 12
104 * RShift | E0 F0 59 <make> | <break> E0 59
105 * L+RShift | E0 F0 12 E0 F0 59 <make> | <break> E0 59 E0 12
108 * modifiers | make | break
109 * ----------+---------------------------+----------------------
110 * Other | E0 12 <make> | <break> E0 F0 12
111 * Shift'd | <make> | <break>
113 * Handling: ignore these prefix/postfix codes
117 * modifiers | make | break
118 * ----------+---------------------------+----------------------
119 * Ohter | <make> | <break>
120 * LShift | E0 F0 12 <make> | <break> E0 12
121 * RShift | E0 F0 59 <make> | <break> E0 59
122 * L+RShift | E0 F0 12 E0 F0 59 <make> | <break> E0 59 E0 12
124 * Handling: ignore these prefix/postfix codes
128 * With hoding down modifiers, the scan code is sent as following:
130 * modifiers | make | break
131 * ----------+--------------+-----------------------------------
132 * Other | E0 12 E0 7C | E0 F0 7C E0 F0 12
133 * Shift'd | E0 7C | E0 F0 7C
134 * Control'd | E0 7C | E0 F0 7C
137 * Handling: ignore prefix/postfix codes and treat both scan code
138 * E0 7C and 84 as PrintScreen.
141 * With hoding down modifiers, the scan code is sent as following:
143 * modifiers | make(no break code)
144 * ----------+--------------------------------------------------
145 * no mods | E1 14 77 E1 F0 14 F0 77
146 * Control'd | E0 7E E0 F0 7E
148 * Handling: treat these two code sequence as Pause
151 uint8_t matrix_scan(void)
159 // states for Pause/Break
166 E1_14_77_E1_F0_14_F0,
172 // Pause/Break off(PS/2 has no break for this key)
173 if (matrix_is_on(ROW(PAUSE), COL(PAUSE))) {
178 while ((code = ps2_host_recv())) {
182 case 0xE0: // 2byte make
185 case 0xF0: // break code
188 case 0xE1: // Pause/Break
195 case 0x84: // PrintScreen
196 matrix_make(PRINT_SCREEN);
199 default: // normal key make
203 debug("unexpected scan code at INIT: "); debug_hex(code); debug("\n");
210 case 0x12: // postfix/postfix code for exceptional keys
211 case 0x59: // postfix/postfix code for exceptional keys
215 case 0x7E: // former part of Control-Pause[E0 7E E0 F0 7E]
219 case 0xF0: // E0 break
224 matrix_make(code|0x80);
226 debug("unexpected scan code at E0: "); debug_hex(code); debug("\n");
238 matrix_break(PRINT_SCREEN);
245 debug("unexpected scan code at F0: "); debug_hex(code); debug("\n");
250 case E0_F0: // E0 break
252 case 0x12: // postfix/postfix code for exceptional keys
253 case 0x59: // postfix/postfix code for exceptional keys
254 case 0x7E: // latter part of Control-Pause[E0 7E E0 F0 7E]
260 matrix_break(code|0x80);
262 debug("unexpected scan code at E0_F0: "); debug_hex(code); debug("\n");
298 state = E1_14_77_E1_F0;
307 state = E1_14_77_E1_F0_14;
313 case E1_14_77_E1_F0_14:
316 state = E1_14_77_E1_F0_14_F0;
322 case E1_14_77_E1_F0_14_F0:
339 bool matrix_is_modified(void)
345 bool matrix_has_ghost(void)
347 #ifdef MATRIX_HAS_GHOST
348 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
349 if (matrix_has_ghost_in_row(i))
357 bool matrix_is_on(uint8_t row, uint8_t col)
359 return (matrix[row] & (1<<col));
363 #if (MATRIX_COLS <= 8)
364 uint8_t matrix_get_row(uint8_t row)
366 uint16_t matrix_get_row(uint8_t row)
372 void matrix_print(void)
374 #if (MATRIX_COLS <= 8)
375 print("\nr/c 01234567\n");
377 print("\nr/c 0123456789ABCDEF\n");
379 for (uint8_t row = 0; row < matrix_rows(); row++) {
380 phex(row); print(": ");
381 #if (MATRIX_COLS <= 8)
382 pbin_reverse(matrix_get_row(row));
384 pbin_reverse16(matrix_get_row(row));
386 #ifdef MATRIX_HAS_GHOST
387 if (matrix_has_ghost_in_row(row)) {
395 uint8_t matrix_key_count(void)
398 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
399 #if (MATRIX_COLS <= 8)
400 count += bitpop(matrix[i]);
402 count += bitpop16(matrix[i]);
408 #ifdef MATRIX_HAS_GHOST
410 static bool matrix_has_ghost_in_row(uint8_t row)
412 // no ghost exists in case less than 2 keys on
413 if (((matrix[row] - 1) & matrix[row]) == 0)
416 // ghost exists in case same state as other row
417 for (uint8_t i=0; i < MATRIX_ROWS; i++) {
418 if (i != row && (matrix[i] & matrix[row]) == matrix[row])
427 static void matrix_make(uint8_t code)
429 if (!matrix_is_on(ROW(code), COL(code))) {
430 matrix[ROW(code)] |= 1<<COL(code);
436 static void matrix_break(uint8_t code)
438 if (matrix_is_on(ROW(code), COL(code))) {
439 matrix[ROW(code)] &= ~(1<<COL(code));