297 lines
7.4 KiB
C
297 lines
7.4 KiB
C
/*
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Copyright 2011 Jun Wako <wakojun@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* scan matrix
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#include <avr/io.h>
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#include <util/delay.h>
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#include "print.h"
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#include "util.h"
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#include "debug.h"
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#include "adb.h"
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#include "matrix.h"
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#include "report.h"
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#include "host.h"
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#if (MATRIX_COLS > 16)
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# error "MATRIX_COLS must not exceed 16"
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#endif
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#if (MATRIX_ROWS > 255)
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# error "MATRIX_ROWS must not exceed 255"
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#endif
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static bool is_modified = false;
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static report_mouse_t mouse_report = {};
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// matrix state buffer(1:on, 0:off)
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#if (MATRIX_COLS <= 8)
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static uint8_t matrix[MATRIX_ROWS];
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#else
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static uint16_t matrix[MATRIX_ROWS];
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#endif
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#ifdef MATRIX_HAS_GHOST
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static bool matrix_has_ghost_in_row(uint8_t row);
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#endif
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static void register_key(uint8_t key);
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inline
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uint8_t matrix_rows(void)
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{
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return MATRIX_ROWS;
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}
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inline
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uint8_t matrix_cols(void)
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{
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return MATRIX_COLS;
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}
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void matrix_init(void)
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{
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adb_host_init();
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// wait for keyboard to boot up and receive command
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_delay_ms(1000);
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// Enable keyboard left/right modifier distinction
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// Addr:Keyboard(0010), Cmd:Listen(10), Register3(11)
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// upper byte: reserved bits 0000, device address 0010
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// lower byte: device handler 00000011
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adb_host_listen(0x2B,0x02,0x03);
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// initialize matrix state: all keys off
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for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
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debug_enable = true;
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//debug_matrix = true;
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//debug_keyboard = true;
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//debug_mouse = true;
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print("debug enabled.\n");
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return;
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}
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#ifdef ADB_MOUSE_ENABLE
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#ifdef MAX
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#undef MAX
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#endif
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#define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
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void adb_mouse_task(void)
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{
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uint16_t codes;
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int16_t x, y;
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static int8_t mouseacc;
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_delay_ms(12); // delay for preventing overload of poor ADB keyboard controller
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codes = adb_host_mouse_recv();
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// If nothing received reset mouse acceleration, and quit.
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if (!codes) {
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mouseacc = 1;
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return;
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};
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// Bit sixteen is button.
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if (~codes & (1 << 15))
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mouse_report.buttons |= MOUSE_BTN1;
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if (codes & (1 << 15))
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mouse_report.buttons &= ~MOUSE_BTN1;
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// lower seven bits are movement, as signed int_7.
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// low byte is X-axis, high byte is Y.
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y = (codes>>8 & 0x3F);
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x = (codes>>0 & 0x3F);
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// bit seven and fifteen is negative
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// usb does not use int_8, but int_7 (measuring distance) with sign-bit.
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if (codes & (1 << 6))
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x = (x-0x40);
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if (codes & (1 << 14))
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y = (y-0x40);
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// Accelerate mouse. (They weren't meant to be used on screens larger than 320x200).
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x *= mouseacc;
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y *= mouseacc;
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// Cap our two bytes per axis to one byte.
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// Easier with a MIN-function, but since -MAX(-a,-b) = MIN(a,b)...
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// I.E. MIN(MAX(x,-127),127) = -MAX(-MAX(x, -127), -127) = MIN(-MIN(-x,127),127)
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mouse_report.x = -MAX(-MAX(x, -127), -127);
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mouse_report.y = -MAX(-MAX(y, -127), -127);
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if (debug_mouse) {
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print("adb_host_mouse_recv: "); print_bin16(codes); print("\n");
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print("adb_mouse raw: [");
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phex(mouseacc); print(" ");
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phex(mouse_report.buttons); print("|");
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print_decs(mouse_report.x); print(" ");
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print_decs(mouse_report.y); print("]\n");
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}
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// Send result by usb.
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host_mouse_send(&mouse_report);
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// increase acceleration of mouse
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mouseacc += ( mouseacc < ADB_MOUSE_MAXACC ? 1 : 0 );
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return;
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}
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#endif
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uint8_t matrix_scan(void)
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{
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/* extra_key is volatile and more convoluted than necessary because gcc refused
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to generate valid code otherwise. Making extra_key uint8_t and constructing codes
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here via codes = extra_key<<8 | 0xFF; would consistently fail to even LOAD
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extra_key from memory, and leave garbage in the high byte of codes. I tried
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dozens of code variations and it kept generating broken assembly output. So
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beware if attempting to make extra_key code more logical and efficient. */
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static volatile uint16_t extra_key = 0xFFFF;
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uint16_t codes;
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uint8_t key0, key1;
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is_modified = false;
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codes = extra_key;
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extra_key = 0xFFFF;
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if ( codes == 0xFFFF )
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{
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_delay_ms(12); // delay for preventing overload of poor ADB keyboard controller
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codes = adb_host_kbd_recv();
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}
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key0 = codes>>8;
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key1 = codes&0xFF;
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if (debug_matrix && codes) {
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print("adb_host_kbd_recv: "); phex16(codes); print("\n");
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}
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if (codes == 0) { // no keys
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return 0;
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} else if (codes == 0x7F7F) { // power key press
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register_key(0x7F);
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} else if (codes == 0xFFFF) { // power key release
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register_key(0xFF);
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} else if (key0 == 0xFF) { // error
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xprintf("adb_host_kbd_recv: ERROR(%d)\n", codes);
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return key1;
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} else {
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register_key(key0);
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if (key1 != 0xFF) // key1 is 0xFF when no second key.
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extra_key = key1<<8 | 0xFF; // process in a separate call
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}
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return 1;
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}
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bool matrix_is_modified(void)
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{
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return is_modified;
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}
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inline
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bool matrix_has_ghost(void)
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{
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#ifdef MATRIX_HAS_GHOST
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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if (matrix_has_ghost_in_row(i))
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return true;
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}
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#endif
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return false;
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}
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inline
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bool matrix_is_on(uint8_t row, uint8_t col)
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{
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return (matrix[row] & (1<<col));
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}
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inline
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#if (MATRIX_COLS <= 8)
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uint8_t matrix_get_row(uint8_t row)
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#else
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uint16_t matrix_get_row(uint8_t row)
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#endif
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{
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return matrix[row];
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}
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void matrix_print(void)
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{
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if (!debug_matrix) return;
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#if (MATRIX_COLS <= 8)
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print("r/c 01234567\n");
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#else
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print("r/c 0123456789ABCDEF\n");
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#endif
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for (uint8_t row = 0; row < matrix_rows(); row++) {
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phex(row); print(": ");
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#if (MATRIX_COLS <= 8)
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pbin_reverse(matrix_get_row(row));
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#else
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pbin_reverse16(matrix_get_row(row));
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#endif
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#ifdef MATRIX_HAS_GHOST
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if (matrix_has_ghost_in_row(row)) {
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print(" <ghost");
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}
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#endif
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print("\n");
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}
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}
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uint8_t matrix_key_count(void)
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{
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uint8_t count = 0;
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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#if (MATRIX_COLS <= 8)
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count += bitpop(matrix[i]);
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#else
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count += bitpop16(matrix[i]);
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#endif
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}
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return count;
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}
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#ifdef MATRIX_HAS_GHOST
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inline
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static bool matrix_has_ghost_in_row(uint8_t row)
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{
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// no ghost exists in case less than 2 keys on
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if (((matrix[row] - 1) & matrix[row]) == 0)
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return false;
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// ghost exists in case same state as other row
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for (uint8_t i=0; i < MATRIX_ROWS; i++) {
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if (i != row && (matrix[i] & matrix[row]) == matrix[row])
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return true;
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}
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return false;
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}
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#endif
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inline
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static void register_key(uint8_t key)
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{
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uint8_t col, row;
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col = key&0x07;
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row = (key>>3)&0x0F;
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if (key&0x80) {
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matrix[row] &= ~(1<<col);
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} else {
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matrix[row] |= (1<<col);
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}
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is_modified = true;
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}
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