132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
/*
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Copyright 2014 Robin Haberkorn <robin.haberkorn@googlemail.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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#include <stdint.h>
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#include <avr/io.h>
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#include <util/delay.h>
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#include "serial.h"
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#include "serial_mouse.h"
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#include "report.h"
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#include "host.h"
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#include "timer.h"
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#include "print.h"
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#include "debug.h"
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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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//#define SERIAL_MOUSE_CENTER_SCROLL
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static void print_usb_data(const report_mouse_t *report);
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void serial_mouse_task(void)
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{
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/* 5 byte ring buffer */
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static uint8_t buffer[5];
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static int buffer_cur = 0;
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int16_t rcv;
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report_mouse_t report = {0, 0, 0, 0, 0};
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rcv = serial_recv2();
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if (rcv < 0)
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/* no new data */
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return;
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if (debug_mouse)
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xprintf("serial_mouse: byte: %04X\n", rcv);
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/*
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* Synchronization: mouse(4) says that all
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* bytes but the first one in the packet have
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* bit 7 == 0, but this is untrue.
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* Therefore we discard all bytes up to the
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* first one with the characteristic bit pattern.
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*/
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if (buffer_cur == 0 && (rcv >> 3) != 0x10)
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return;
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buffer[buffer_cur++] = (uint8_t)rcv;
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if (buffer_cur < 5)
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return;
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buffer_cur = 0;
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#ifdef SERIAL_MOUSE_CENTER_SCROLL
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if ((buffer[0] & 0x7) == 0x5 && (buffer[1] || buffer[2])) {
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/* USB HID uses only values from -127 to 127 */
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report.h = MAX((int8_t)buffer[1], -127);
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report.v = MAX((int8_t)buffer[2], -127);
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print_usb_data(&report);
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host_mouse_send(&report);
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if (buffer[3] || buffer[4]) {
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report.h = MAX((int8_t)buffer[3], -127);
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report.v = MAX((int8_t)buffer[4], -127);
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print_usb_data(&report);
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host_mouse_send(&report);
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}
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return;
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}
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#endif
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/*
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* parse 5 byte packet.
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* NOTE: We only get a complete packet
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* if the mouse moved or the button states
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* change.
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*/
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if (!(buffer[0] & (1 << 2)))
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report.buttons |= MOUSE_BTN1;
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if (!(buffer[0] & (1 << 1)))
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report.buttons |= MOUSE_BTN3;
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if (!(buffer[0] & (1 << 0)))
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report.buttons |= MOUSE_BTN2;
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/* USB HID uses only values from -127 to 127 */
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report.x = MAX((int8_t)buffer[1], -127);
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report.y = MAX(-(int8_t)buffer[2], -127);
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print_usb_data(&report);
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host_mouse_send(&report);
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if (buffer[3] || buffer[4]) {
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report.x = MAX((int8_t)buffer[3], -127);
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report.y = MAX(-(int8_t)buffer[4], -127);
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print_usb_data(&report);
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host_mouse_send(&report);
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}
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}
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static void print_usb_data(const report_mouse_t *report)
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{
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if (!debug_mouse)
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return;
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xprintf("serial_mouse usb: [%02X|%d %d %d %d]\n",
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report->buttons, report->x, report->y,
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report->v, report->h);
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}
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