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- /*
- Copyright 2014 Robin Haberkorn <[email protected]>
-
- 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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