diff options
Diffstat (limited to 'converter/adb_usb/matrix.c')
| -rw-r--r-- | converter/adb_usb/matrix.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/converter/adb_usb/matrix.c b/converter/adb_usb/matrix.c new file mode 100644 index 0000000000..405391865f --- /dev/null +++ b/converter/adb_usb/matrix.c @@ -0,0 +1,235 @@ +/* +Copyright 2011 Jun Wako <wakojun@gmail.com> + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +/* + * scan matrix + */ +#include <stdint.h> +#include <stdbool.h> +#include <avr/io.h> +#include <util/delay.h> +#include "print.h" +#include "util.h" +#include "debug.h" +#include "adb.h" +#include "matrix.h" + + +#if (MATRIX_COLS > 16) +# error "MATRIX_COLS must not exceed 16" +#endif +#if (MATRIX_ROWS > 255) +# error "MATRIX_ROWS must not exceed 255" +#endif + + +static bool is_modified = false; + +// matrix state buffer(1:on, 0:off) +#if (MATRIX_COLS <= 8) +static uint8_t matrix[MATRIX_ROWS]; +#else +static uint16_t matrix[MATRIX_ROWS]; +#endif + +#ifdef MATRIX_HAS_GHOST +static bool matrix_has_ghost_in_row(uint8_t row); +#endif +static void register_key(uint8_t key); + + +inline +uint8_t matrix_rows(void) +{ + return MATRIX_ROWS; +} + +inline +uint8_t matrix_cols(void) +{ + return MATRIX_COLS; +} + +void matrix_init(void) +{ + adb_host_init(); + // wait for keyboard to boot up and receive command + _delay_ms(1000); + // Enable keyboard left/right modifier distinction + // Addr:Keyboard(0010), Cmd:Listen(10), Register3(11) + // upper byte: reserved bits 0000, device address 0010 + // lower byte: device handler 00000011 + adb_host_listen(0x2B,0x02,0x03); + + // initialize matrix state: all keys off + for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00; + + debug_enable = true; + //debug_matrix = true; + //debug_keyboard = true; + //debug_mouse = true; + print("debug enabled.\n"); + return; +} + +uint8_t matrix_scan(void) +{ + /* extra_key is volatile and more convoluted than necessary because gcc refused + to generate valid code otherwise. Making extra_key uint8_t and constructing codes + here via codes = extra_key<<8 | 0xFF; would consistently fail to even LOAD + extra_key from memory, and leave garbage in the high byte of codes. I tried + dozens of code variations and it kept generating broken assembly output. So + beware if attempting to make extra_key code more logical and efficient. */ + static volatile uint16_t extra_key = 0xFFFF; + uint16_t codes; + uint8_t key0, key1; + + is_modified = false; + + codes = extra_key; + extra_key = 0xFFFF; + + if ( codes == 0xFFFF ) + { + _delay_ms(12); // delay for preventing overload of poor ADB keyboard controller + codes = adb_host_kbd_recv(); + } + key0 = codes>>8; + key1 = codes&0xFF; + + if (debug_matrix && codes) { + print("adb_host_kbd_recv: "); phex16(codes); print("\n"); + } + + if (codes == 0) { // no keys + return 0; + } else if (codes == 0x7F7F) { // power key press + register_key(0x7F); + } else if (codes == 0xFFFF) { // power key release + register_key(0xFF); + } else if (key0 == 0xFF) { // error + xprintf("adb_host_kbd_recv: ERROR(%d)\n", codes); + return key1; + } else { + register_key(key0); + if (key1 != 0xFF) // key1 is 0xFF when no second key. + extra_key = key1<<8 | 0xFF; // process in a separate call + } + + return 1; +} + +bool matrix_is_modified(void) +{ + return is_modified; +} + +inline +bool matrix_has_ghost(void) +{ +#ifdef MATRIX_HAS_GHOST + for (uint8_t i = 0; i < MATRIX_ROWS; i++) { + if (matrix_has_ghost_in_row(i)) + return true; + } +#endif + return false; +} + +inline +bool matrix_is_on(uint8_t row, uint8_t col) +{ + return (matrix[row] & (1<<col)); +} + +inline +#if (MATRIX_COLS <= 8) +uint8_t matrix_get_row(uint8_t row) +#else +uint16_t matrix_get_row(uint8_t row) +#endif +{ + return matrix[row]; +} + +void matrix_print(void) +{ + if (!debug_matrix) return; +#if (MATRIX_COLS <= 8) + print("r/c 01234567\n"); +#else + print("r/c 0123456789ABCDEF\n"); +#endif + for (uint8_t row = 0; row < matrix_rows(); row++) { + phex(row); print(": "); +#if (MATRIX_COLS <= 8) + pbin_reverse(matrix_get_row(row)); +#else + pbin_reverse16(matrix_get_row(row)); +#endif +#ifdef MATRIX_HAS_GHOST + if (matrix_has_ghost_in_row(row)) { + print(" <ghost"); + } +#endif + print("\n"); + } +} + +uint8_t matrix_key_count(void) +{ + uint8_t count = 0; + for (uint8_t i = 0; i < MATRIX_ROWS; i++) { +#if (MATRIX_COLS <= 8) + count += bitpop(matrix[i]); +#else + count += bitpop16(matrix[i]); +#endif + } + return count; +} + +#ifdef MATRIX_HAS_GHOST +inline +static bool matrix_has_ghost_in_row(uint8_t row) +{ + // no ghost exists in case less than 2 keys on + if (((matrix[row] - 1) & matrix[row]) == 0) + return false; + + // ghost exists in case same state as other row + for (uint8_t i=0; i < MATRIX_ROWS; i++) { + if (i != row && (matrix[i] & matrix[row]) == matrix[row]) + return true; + } + return false; +} +#endif + +inline +static void register_key(uint8_t key) +{ + uint8_t col, row; + col = key&0x07; + row = (key>>3)&0x0F; + if (key&0x80) { + matrix[row] &= ~(1<<col); + } else { + matrix[row] |= (1<<col); + } + is_modified = true; +} |