/* Copyright 2011,2013 Jun Wako 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 . */ #include #include #include #include "ps2.h" #include "ps2_mouse.h" #include "usb_mouse.h" #define PS2_MOUSE_DEBUG #ifdef PS2_MOUSE_DEBUG # include "print.h" # include "debug.h" #else # define print(s) # define phex(h) # define phex16(h) #endif bool ps2_mouse_enable = true; uint8_t ps2_mouse_x = 0; uint8_t ps2_mouse_y = 0; uint8_t ps2_mouse_btn = 0; uint8_t ps2_mouse_error_count = 0; static uint8_t ps2_mouse_btn_prev = 0; uint8_t ps2_mouse_init(void) { uint8_t rcv; if (!ps2_mouse_enable) return 1; ps2_host_init(); // Not reliable: sometime fail to initialize mouse // send Reset _delay_ms(1000); // wait for powering up rcv = ps2_host_send(0xFF); print("ps2_mouse_init: send Reset: "); phex(rcv); phex(ps2_error); print("\n"); // read completion code of BAT //_delay_ms(1000); // wait for Basic Assurance Test rcv = ps2_host_recv(); print("ps2_mouse_init: read BAT: "); phex(rcv); phex(ps2_error); print("\n"); // read Device ID rcv = ps2_host_recv(); print("ps2_mouse_init: read DevID: "); phex(rcv); phex(ps2_error); print("\n"); // send Enable Data Reporting rcv = ps2_host_send(0xF4); print("ps2_mouse_init: send 0xF4: "); phex(rcv); phex(ps2_error); print("\n"); // send Set Remote mode rcv = ps2_host_send(0xF0); print("ps2_mouse_init: send 0xF0: "); phex(rcv); phex(ps2_error); print("\n"); return 0; } uint8_t ps2_mouse_read(void) { uint8_t rcv; if (!ps2_mouse_enable) return 1; rcv = ps2_host_send(0xEB); if(rcv==0xFA) { ps2_mouse_btn = ps2_host_recv_response(); ps2_mouse_x = ps2_host_recv_response(); ps2_mouse_y = ps2_host_recv_response(); } return 0; } bool ps2_mouse_changed(void) { return (ps2_mouse_x || ps2_mouse_y || (ps2_mouse_btn & PS2_MOUSE_BTN_MASK) != ps2_mouse_btn_prev); } #define PS2_MOUSE_SCROLL_BUTTON 0x04 void ps2_mouse_usb_send(void) { static bool scrolled = false; if (!ps2_mouse_enable) return; if (ps2_mouse_changed()) { int8_t x, y, v, h; x = y = v = h = 0; // convert scale of X, Y: PS/2(-256/255) -> USB(-127/127) if (ps2_mouse_btn & (1< 128 ? (int8_t)ps2_mouse_x : -127; else x = ps2_mouse_x < 128 ? (int8_t)ps2_mouse_x : 127; if (ps2_mouse_btn & (1< 128 ? (int8_t)ps2_mouse_y : -127; else y = ps2_mouse_y < 128 ? (int8_t)ps2_mouse_y : 127; // Y is needed to reverse y = -y; if (ps2_mouse_btn & PS2_MOUSE_SCROLL_BUTTON) { // scroll if (x > 0 || x < 0) h = (x > 64 ? 64 : (x < -64 ? -64 :x)); if (y > 0 || y < 0) v = (y > 64 ? 64 : (y < -64 ? -64 :y)); if (h || v) { scrolled = true; usb_mouse_send(0,0, -v/16, h/16, 0); _delay_ms(100); } } else if (!scrolled && (ps2_mouse_btn_prev & PS2_MOUSE_SCROLL_BUTTON)) { usb_mouse_send(0,0,0,0, PS2_MOUSE_SCROLL_BUTTON); _delay_ms(100); usb_mouse_send(0,0,0,0, 0); } else { scrolled = false; usb_mouse_send(x, y, 0, 0, ps2_mouse_btn & PS2_MOUSE_BTN_MASK); } ps2_mouse_btn_prev = (ps2_mouse_btn & PS2_MOUSE_BTN_MASK); ps2_mouse_print(); } ps2_mouse_x = 0; ps2_mouse_y = 0; ps2_mouse_btn = 0; } void ps2_mouse_print(void) { if (!debug_mouse) return; print("ps2_mouse[btn|x y]: "); phex(ps2_mouse_btn); print("|"); phex(ps2_mouse_x); print(" "); phex(ps2_mouse_y); print("\n"); } /* PS/2 Mouse Synopsis * http://www.computer-engineering.org/ps2mouse/ * * Command: * 0xFF: Reset * 0xF6: Set Defaults Sampling; rate=100, resolution=4cnt/mm, scaling=1:1, reporting=disabled * 0xF5: Disable Data Reporting * 0xF4: Enable Data Reporting * 0xF3: Set Sample Rate * 0xF2: Get Device ID * 0xF0: Set Remote Mode * 0xEB: Read Data * 0xEA: Set Stream Mode * 0xE9: Status Request * 0xE8: Set Resolution * 0xE7: Set Scaling 2:1 * 0xE6: Set Scaling 1:1 * * Mode: * Stream Mode: devices sends the data when it changs its state * Remote Mode: host polls the data periodically * * This code uses Remote Mode and polls the data with Read Data(0xEB). * * Data format: * byte|7 6 5 4 3 2 1 0 * ----+-------------------------------------------------------------- * 0|Yovflw Xovflw Ysign Xsign 1 Middle Right Left * 1| X movement(0-255) * 2| Y movement(0-255) */