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tmk_keyboard/converter/adb_usb/matrix.c

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/*
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/>.
*/
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/*
* 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"
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#include "matrix.h"
#include "report.h"
#include "host.h"
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#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;
static report_mouse_t mouse_report = {};
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// matrix state buffer(1:on, 0:off)
#if (MATRIX_COLS <= 8)
static uint8_t matrix[MATRIX_ROWS];
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#else
static uint16_t matrix[MATRIX_ROWS];
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#endif
#ifdef MATRIX_HAS_GHOST
static bool matrix_has_ghost_in_row(uint8_t row);
#endif
static void register_key(uint8_t key);
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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);
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// initialize matrix state: all keys off
for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
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debug_enable = true;
//debug_matrix = true;
//debug_keyboard = true;
//debug_mouse = true;
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print("debug enabled.\n");
return;
}
#ifdef ADB_MOUSE_ENABLE
#ifdef MAX
#undef MAX
#endif
#define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
void adb_mouse_task(void)
{
uint16_t codes;
int16_t x, y;
static int8_t mouseacc;
_delay_ms(12); // delay for preventing overload of poor ADB keyboard controller
codes = adb_host_mouse_recv();
// If nothing received reset mouse acceleration, and quit.
if (!codes) {
mouseacc = 1;
return;
};
// Bit sixteen is button.
if (~codes & (1 << 15))
mouse_report.buttons |= MOUSE_BTN1;
if (codes & (1 << 15))
mouse_report.buttons &= ~MOUSE_BTN1;
// lower seven bits are movement, as signed int_7.
// low byte is X-axis, high byte is Y.
y = (codes>>8 & 0x3F);
x = (codes>>0 & 0x3F);
// bit seven and fifteen is negative
// usb does not use int_8, but int_7 (measuring distance) with sign-bit.
if (codes & (1 << 6))
x = (x-0x40);
if (codes & (1 << 14))
y = (y-0x40);
// Accelerate mouse. (They weren't meant to be used on screens larger than 320x200).
x *= mouseacc;
y *= mouseacc;
// Cap our two bytes per axis to one byte.
// Easier with a MIN-function, but since -MAX(-a,-b) = MIN(a,b)...
// I.E. MIN(MAX(x,-127),127) = -MAX(-MAX(x, -127), -127) = MIN(-MIN(-x,127),127)
mouse_report.x = -MAX(-MAX(x, -127), -127);
mouse_report.y = -MAX(-MAX(y, -127), -127);
if (debug_mouse) {
print("adb_host_mouse_recv: "); print_bin16(codes); print("\n");
print("adb_mouse raw: [");
phex(mouseacc); print(" ");
phex(mouse_report.buttons); print("|");
print_decs(mouse_report.x); print(" ");
print_decs(mouse_report.y); print("]\n");
}
// Send result by usb.
host_mouse_send(&mouse_report);
// increase acceleration of mouse
mouseacc += ( mouseacc < ADB_MOUSE_MAXACC ? 1 : 0 );
return;
}
#endif
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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;
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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();
}
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key0 = codes>>8;
key1 = codes&0xFF;
if (debug_matrix && codes) {
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print("adb_host_kbd_recv: "); phex16(codes); print("\n");
}
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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;
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} else {
register_key(key0);
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if (key1 != 0xFF) // key1 is 0xFF when no second key.
extra_key = key1<<8 | 0xFF; // process in a separate call
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}
return 1;
}
bool matrix_is_modified(void)
{
return is_modified;
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}
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;
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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
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)
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{
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;
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}