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+/*
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+Copyright 2011,2013 Jun Wako <wakojun@gmail.com>
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+
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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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+
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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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+
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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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+#include <stdint.h>
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+#include <avr/io.h>
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+#include <util/delay.h>
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+
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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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+
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+#define SERIAL_MOUSE_CENTER_SCROLL
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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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+uint8_t serial_mouse_init(void)
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+{
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+ serial_init();
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+ return 0;
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+}
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+
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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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+
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+ int16_t rcv;
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+
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+ report_mouse_t report = {0, 0, 0, 0, 0};
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+
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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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+
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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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+ /*
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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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+
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+ buffer[buffer_cur++] = (uint8_t)rcv;
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+
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+ if (buffer_cur < 5)
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+ return;
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+ buffer_cur = 0;
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+
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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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+ report.h = (int8_t)buffer[1];
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+ /* USB HID uses only values from -127 to 127 */
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+ report.h = report.h < -127 ? -127 : report.h;
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+ report.v = (int8_t)buffer[2];
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+ report.v = report.v < -127 ? -127 : report.v;
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+
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+ print_usb_data(&report);
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+ host_mouse_send(&report);
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+
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+ if (buffer[3] || buffer[4]) {
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+ report.h = (int8_t)buffer[3];
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+ report.h = report.h < -127 ? -127 : report.h;
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+ report.v = (int8_t)buffer[4];
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+ report.v = report.v < -127 ? -127 : report.v;
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+
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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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+ return;
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+ }
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+#endif
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+
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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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+
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+ report.x = (int8_t)buffer[1];
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+ /* USB HID uses only values from -127 to 127 */
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+ report.x = report.x < -127 ? -127 : report.x;
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+ report.y = -(int8_t)buffer[2];
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+ report.y = report.y < -127 ? -127 : report.y;
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+
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+ print_usb_data(&report);
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+ host_mouse_send(&report);
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+
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+ if (buffer[3] || buffer[4]) {
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+ report.x = (int8_t)buffer[3];
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+ report.x = report.x < -127 ? -127 : report.x;
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+ report.y = -(int8_t)buffer[4];
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+ report.y = report.y < -127 ? -127 : report.y;
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+
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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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+
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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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+
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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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