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