diff options
Diffstat (limited to 'keyboards/converter/ibm_terminal/matrix.c')
| -rw-r--r-- | keyboards/converter/ibm_terminal/matrix.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/keyboards/converter/ibm_terminal/matrix.c b/keyboards/converter/ibm_terminal/matrix.c new file mode 100644 index 000000000..c0b5971c3 --- /dev/null +++ b/keyboards/converter/ibm_terminal/matrix.c @@ -0,0 +1,232 @@ +/* +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/>. +*/ + +#include <stdint.h> +#include <stdbool.h> +#include <avr/io.h> +#include <util/delay.h> +#include "print.h" +#include "util.h" +#include "debug.h" +#include "ps2.h" +#include "matrix.h" + +#define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row)) +#define print_matrix_header() print("\nr/c 01234567\n") +#define matrix_bitpop(i) bitpop(matrix[i]) +#define ROW_SHIFTER ((uint8_t)1) + + +static void matrix_make(uint8_t code); +static void matrix_break(uint8_t code); + + +/* + * Matrix Array usage: + * 'Scan Code Set 3' is assigned into 17x8 cell matrix. + * + * 8bit wide + * +---------+ + * 0| | + * :| | 0x00-0x87 + * ;| | + * 17| | + * +---------+ + */ +static uint8_t matrix[MATRIX_ROWS]; +#define ROW(code) (code>>3) +#define COL(code) (code&0x07) + + +void matrix_init(void) +{ + debug_enable = true; + //debug_matrix = true; + //debug_keyboard = true; + //debug_mouse = false; + + ps2_host_init(); + + // initialize matrix state: all keys off + for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00; + + return; +} + +uint8_t matrix_scan(void) +{ + + // scan code reading states + static enum { + RESET, + RESET_RESPONSE, + KBD_ID0, + KBD_ID1, + CONFIG, + READY, + F0, + } state = RESET; + + uint8_t code; + if ((code = ps2_host_recv())) { + debug("r"); debug_hex(code); debug(" "); + } + + switch (state) { + case RESET: + debug("wFF "); + if (ps2_host_send(0xFF) == 0xFA) { + debug("[ack]\nRESET_RESPONSE: "); + state = RESET_RESPONSE; + } + break; + case RESET_RESPONSE: + if (code == 0xAA) { + debug("[ok]\nKBD_ID: "); + state = KBD_ID0; + } else if (code) { + debug("err\nRESET: "); + state = RESET; + } + break; + // after reset receive keyboad ID(2 bytes) + case KBD_ID0: + if (code) { + state = KBD_ID1; + } + break; + case KBD_ID1: + if (code) { + debug("\nCONFIG: "); + state = CONFIG; + } + break; + case CONFIG: + debug("wF8 "); + if (ps2_host_send(0xF8) == 0xFA) { + debug("[ack]\nREADY\n"); + state = READY; + } + break; + case READY: + switch (code) { + case 0x00: + break; + case 0xF0: + state = F0; + debug(" "); + break; + default: // normal key make + if (code < 0x88) { + matrix_make(code); + } else { + debug("unexpected scan code at READY: "); debug_hex(code); debug("\n"); + } + state = READY; + debug("\n"); + } + break; + case F0: // Break code + switch (code) { + case 0x00: + break; + default: + if (code < 0x88) { + matrix_break(code); + } else { + debug("unexpected scan code at F0: "); debug_hex(code); debug("\n"); + } + state = READY; + debug("\n"); + } + break; + } + return 1; +} + +inline +uint8_t matrix_get_row(uint8_t row) +{ + return matrix[row]; +} + +inline +static void matrix_make(uint8_t code) +{ + if (!matrix_is_on(ROW(code), COL(code))) { + matrix[ROW(code)] |= 1<<COL(code); + } +} + +inline +static void matrix_break(uint8_t code) +{ + if (matrix_is_on(ROW(code), COL(code))) { + matrix[ROW(code)] &= ~(1<<COL(code)); + } +} + +bool matrix_is_on(uint8_t row, uint8_t col) +{ + return (matrix_get_row(row) & (1<<col)); +} + +void matrix_print(void) +{ +#if (MATRIX_COLS <= 8) + print("r/c 01234567\n"); +#elif (MATRIX_COLS <= 16) + print("r/c 0123456789ABCDEF\n"); +#elif (MATRIX_COLS <= 32) + print("r/c 0123456789ABCDEF0123456789ABCDEF\n"); +#endif + + for (uint8_t row = 0; row < MATRIX_ROWS; row++) { + +#if (MATRIX_COLS <= 8) + xprintf("%02X: %08b%s\n", row, bitrev(matrix_get_row(row)), +#elif (MATRIX_COLS <= 16) + xprintf("%02X: %016b%s\n", row, bitrev16(matrix_get_row(row)), +#elif (MATRIX_COLS <= 32) + xprintf("%02X: %032b%s\n", row, bitrev32(matrix_get_row(row)), +#endif +#ifdef MATRIX_HAS_GHOST + matrix_has_ghost_in_row(row) ? " <ghost" : "" +#else + "" +#endif + ); + } +} + +#ifdef MATRIX_HAS_GHOST +__attribute__ ((weak)) +bool matrix_has_ghost_in_row(uint8_t row) +{ + matrix_row_t matrix_row = matrix_get_row(row); + // No ghost exists when less than 2 keys are down on the row + if (((matrix_row - 1) & matrix_row) == 0) + return false; + + // Ghost occurs when the row shares column line with other row + for (uint8_t i=0; i < MATRIX_ROWS; i++) { + if (i != row && (matrix_get_row(i) & matrix_row)) + return true; + } + return false; +} +#endif |