1 files changed, 124 insertions, 0 deletions

diff --git a/protocol/serial_mouse_microsoft.c b/protocol/serial_mouse_microsoft.c
new file mode 100644
index 000000000..ab74b7cdd
--- /dev/null
+++ b/protocol/serial_mouse_microsoft.c
@@ -0,0 +1,124 @@
+/*
+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))
+
+static void print_usb_data(const report_mouse_t *report);
+
+void serial_mouse_task(void)
+{
+    /* 3 byte ring buffer */
+    static uint8_t buffer[3];
+    static int buffer_cur = 0;
+
+    static report_mouse_t report = {};
+
+    int16_t rcv;
+
+    rcv = serial_recv2();
+    if (rcv < 0)
+        /* no new data */
+        return;
+
+    if (debug_mouse)
+        xprintf("serial_mouse: byte: %04X\n", rcv);
+
+    /*
+     * If bit 6 is one, this signals the beginning
+     * of a 3 byte sequence/packet.
+     */
+    if (rcv & (1 << 6))
+        buffer_cur = 0;
+
+    buffer[buffer_cur] = (uint8_t)rcv;
+
+    if (buffer_cur == 0 && buffer[buffer_cur] == 0x20) {
+        /*
+         * Logitech extension: This must be a follow-up on
+         * the last 3-byte packet signaling a middle button click
+         */
+        report.buttons |= MOUSE_BTN3;
+        report.x = report.y = 0;
+
+        print_usb_data(&report);
+        host_mouse_send(&report);
+        return;
+    }
+
+    buffer_cur++;
+
+    if (buffer_cur < 3)
+        return;
+    buffer_cur = 0;
+
+    /*
+     * parse 3 byte packet.
+     * NOTE: We only get a complete packet
+     * if the mouse moved or the button states
+     * change.
+     */
+    report.buttons = 0;
+    if (buffer[0] & (1 << 5))
+        report.buttons |= MOUSE_BTN1;
+    if (buffer[0] & (1 << 4))
+        report.buttons |= MOUSE_BTN2;
+
+    report.x = (buffer[0] << 6) | buffer[1];
+    report.y = ((buffer[0] << 4) & 0xC0) | buffer[2];
+
+    /* USB HID uses values from -127 to 127 only */
+    report.x = MAX(report.x, -127);
+    report.y = MAX(report.y, -127);
+
+#if 0
+    if (!report.buttons && !report.x && !report.y) {
+        /*
+         * Microsoft extension: Middle mouse button pressed
+         * FIXME: I don't know how exactly this extension works.
+         */
+        report.buttons |= MOUSE_BTN3;
+    }
+#endif
+
+    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);
+}