1 files changed, 132 insertions, 0 deletions
diff --git a/common/mousekey.c b/common/mousekey.c
new file mode 100644
index 0000000000..76bd0fd363
--- /dev/null
+++ b/common/mousekey.c
@@ -0,0 +1,132 @@
+/*
+Copyright 2011 Jun Wako <wakojun@gmail.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 <util/delay.h>
+#include "usb_keycodes.h"
+#include "host.h"
+#include "timer.h"
+#include "print.h"
+#include "debug.h"
+#include "mousekey.h"
+
+
+static report_mouse_t report;
+static report_mouse_t report_prev;
+
+static uint8_t mousekey_repeat =  0;
+
+static void mousekey_debug(void);
+
+
+/*
+ * TODO: fix acceleration algorithm
+ * see wikipedia http://en.wikipedia.org/wiki/Mouse_keys
+ */
+#ifndef MOUSEKEY_DELAY_TIME
+#   define MOUSEKEY_DELAY_TIME 255
+#endif
+
+// acceleration parameters
+uint8_t mousekey_move_unit = 2;
+uint8_t mousekey_resolution = 5;
+
+
+static inline uint8_t move_unit(void)
+{
+    uint16_t unit = 5 + mousekey_repeat*2;
+    return (unit > 63 ? 63 : unit);
+}
+
+void mousekey_decode(uint8_t code)
+{
+    if      (code == KB_MS_UP)      report.y = -move_unit();
+    else if (code == KB_MS_DOWN)    report.y = move_unit();
+    else if (code == KB_MS_LEFT)    report.x = -move_unit();
+    else if (code == KB_MS_RIGHT)   report.x = move_unit();
+    else if (code == KB_MS_BTN1)    report.buttons |= MOUSE_BTN1;
+    else if (code == KB_MS_BTN2)    report.buttons |= MOUSE_BTN2;
+    else if (code == KB_MS_BTN3)    report.buttons |= MOUSE_BTN3;
+    else if (code == KB_MS_BTN4)    report.buttons |= MOUSE_BTN4;
+    else if (code == KB_MS_BTN5)    report.buttons |= MOUSE_BTN5;
+    else if (code == KB_MS_WH_UP)   report.v += move_unit()/4;
+    else if (code == KB_MS_WH_DOWN) report.v -= move_unit()/4;
+    else if (code == KB_MS_WH_LEFT) report.h -= move_unit()/4;
+    else if (code == KB_MS_WH_RIGHT)report.h += move_unit()/4;
+}
+
+bool mousekey_changed(void)
+{
+    return (report.buttons != report_prev.buttons ||
+            report.x || report.y || report.v || report.h);
+}
+
+void mousekey_send(void)
+{
+    static uint16_t last_timer = 0;
+
+    if (!mousekey_changed()) {
+        mousekey_repeat = 0;
+        mousekey_clear_report();
+        return;
+    }
+
+    // send immediately when buttun state is changed
+    if (report.buttons == report_prev.buttons) {
+        if (timer_elapsed(last_timer) < 100) {
+            mousekey_clear_report();
+            return;
+        }
+    }
+
+    if (mousekey_repeat != 0xFF) {
+        mousekey_repeat++;
+    }
+
+    if (report.x && report.y) {
+        report.x *= 0.7;
+        report.y *= 0.7;
+    }
+
+    mousekey_debug();
+    host_mouse_send(&report);
+    report_prev = report;
+    last_timer = timer_read();
+    mousekey_clear_report();
+}
+
+void mousekey_clear_report(void)
+{
+    report.buttons = 0;
+    report.x = 0;
+    report.y = 0;
+    report.v = 0;
+    report.h = 0;
+}
+
+static void mousekey_debug(void)
+{
+    if (!debug_mouse) return;
+    print("mousekey[btn|x y v h]: ");
+    phex(report.buttons); print("|");
+    phex(report.x); print(" ");
+    phex(report.y); print(" ");
+    phex(report.v); print(" ");
+    phex(report.h);
+    phex(mousekey_repeat);
+    print("\n");
+}