216 lines
7.1 KiB
C
216 lines
7.1 KiB
C
/*
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Copyright 2011,2013 Jun Wako <wakojun@gmail.com>
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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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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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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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#include <stdbool.h>
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#include<avr/io.h>
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#include<util/delay.h>
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#include "ps2.h"
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#include "ps2_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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static report_mouse_t mouse_report = {};
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static void print_usb_data(void);
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/* supports only 3 button mouse at this time */
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uint8_t ps2_mouse_init(void) {
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uint8_t rcv;
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ps2_host_init();
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_delay_ms(1000); // wait for powering up
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// send Reset
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rcv = ps2_host_send(0xFF);
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print("ps2_mouse_init: send Reset: ");
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phex(rcv); phex(ps2_error); print("\n");
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// read completion code of BAT
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rcv = ps2_host_recv_response();
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print("ps2_mouse_init: read BAT: ");
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phex(rcv); phex(ps2_error); print("\n");
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// read Device ID
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rcv = ps2_host_recv_response();
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print("ps2_mouse_init: read DevID: ");
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phex(rcv); phex(ps2_error); print("\n");
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// send Set Remote mode
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rcv = ps2_host_send(0xF0);
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print("ps2_mouse_init: send 0xF0: ");
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phex(rcv); phex(ps2_error); print("\n");
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return 0;
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}
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#define X_IS_NEG (mouse_report.buttons & (1<<PS2_MOUSE_X_SIGN))
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#define Y_IS_NEG (mouse_report.buttons & (1<<PS2_MOUSE_Y_SIGN))
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#define X_IS_OVF (mouse_report.buttons & (1<<PS2_MOUSE_X_OVFLW))
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#define Y_IS_OVF (mouse_report.buttons & (1<<PS2_MOUSE_Y_OVFLW))
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void ps2_mouse_task(void)
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{
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enum { SCROLL_NONE, SCROLL_BTN, SCROLL_SENT };
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static uint8_t scroll_state = SCROLL_NONE;
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static uint8_t buttons_prev = 0;
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/* receives packet from mouse */
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uint8_t rcv;
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rcv = ps2_host_send(PS2_MOUSE_READ_DATA);
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if (rcv == PS2_ACK) {
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mouse_report.buttons = ps2_host_recv_response();
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mouse_report.x = ps2_host_recv_response();
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mouse_report.y = ps2_host_recv_response();
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} else {
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if (!debug_mouse) print("ps2_mouse: fail to get mouse packet\n");
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return;
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}
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/* if mouse moves or buttons state changes */
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if (mouse_report.x || mouse_report.y ||
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((mouse_report.buttons ^ buttons_prev) & PS2_MOUSE_BTN_MASK)) {
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#ifdef PS2_MOUSE_DEBUG
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print("ps2_mouse raw: [");
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phex(mouse_report.buttons); print("|");
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print_hex8((uint8_t)mouse_report.x); print(" ");
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print_hex8((uint8_t)mouse_report.y); print("]\n");
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#endif
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buttons_prev = mouse_report.buttons;
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// PS/2 mouse data is '9-bit integer'(-256 to 255) which is comprised of sign-bit and 8-bit value.
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// bit: 8 7 ... 0
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// sign \8-bit/
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//
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// Meanwhile USB HID mouse indicates 8bit data(-127 to 127), note that -128 is not used.
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//
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// This converts PS/2 data into HID value. Use only -127-127 out of PS/2 9-bit.
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mouse_report.x = X_IS_NEG ?
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((!X_IS_OVF && -127 <= mouse_report.x && mouse_report.x <= -1) ? mouse_report.x : -127) :
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((!X_IS_OVF && 0 <= mouse_report.x && mouse_report.x <= 127) ? mouse_report.x : 127);
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mouse_report.y = Y_IS_NEG ?
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((!Y_IS_OVF && -127 <= mouse_report.y && mouse_report.y <= -1) ? mouse_report.y : -127) :
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((!Y_IS_OVF && 0 <= mouse_report.y && mouse_report.y <= 127) ? mouse_report.y : 127);
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// remove sign and overflow flags
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mouse_report.buttons &= PS2_MOUSE_BTN_MASK;
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// invert coordinate of y to conform to USB HID mouse
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mouse_report.y = -mouse_report.y;
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#if PS2_MOUSE_SCROLL_BTN_MASK
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static uint16_t scroll_button_time = 0;
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if ((mouse_report.buttons & (PS2_MOUSE_SCROLL_BTN_MASK)) == (PS2_MOUSE_SCROLL_BTN_MASK)) {
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if (scroll_state == SCROLL_NONE) {
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scroll_button_time = timer_read();
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scroll_state = SCROLL_BTN;
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}
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// doesn't send Scroll Button
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//mouse_report.buttons &= ~(PS2_MOUSE_SCROLL_BTN_MASK);
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if (mouse_report.x || mouse_report.y) {
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scroll_state = SCROLL_SENT;
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mouse_report.v = -mouse_report.y/(PS2_MOUSE_SCROLL_DIVISOR_V);
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mouse_report.h = mouse_report.x/(PS2_MOUSE_SCROLL_DIVISOR_H);
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mouse_report.x = 0;
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mouse_report.y = 0;
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//host_mouse_send(&mouse_report);
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}
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}
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else if ((mouse_report.buttons & (PS2_MOUSE_SCROLL_BTN_MASK)) == 0) {
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#if PS2_MOUSE_SCROLL_BTN_SEND
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if (scroll_state == SCROLL_BTN &&
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TIMER_DIFF_16(timer_read(), scroll_button_time) < PS2_MOUSE_SCROLL_BTN_SEND) {
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// send Scroll Button(down and up at once) when not scrolled
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mouse_report.buttons |= (PS2_MOUSE_SCROLL_BTN_MASK);
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host_mouse_send(&mouse_report);
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_delay_ms(100);
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mouse_report.buttons &= ~(PS2_MOUSE_SCROLL_BTN_MASK);
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}
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#endif
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scroll_state = SCROLL_NONE;
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}
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// doesn't send Scroll Button
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mouse_report.buttons &= ~(PS2_MOUSE_SCROLL_BTN_MASK);
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#endif
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host_mouse_send(&mouse_report);
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print_usb_data();
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}
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// clear report
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mouse_report.x = 0;
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mouse_report.y = 0;
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mouse_report.v = 0;
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mouse_report.h = 0;
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mouse_report.buttons = 0;
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}
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static void print_usb_data(void)
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{
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if (!debug_mouse) return;
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print("ps2_mouse usb: [");
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phex(mouse_report.buttons); print("|");
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print_hex8((uint8_t)mouse_report.x); print(" ");
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print_hex8((uint8_t)mouse_report.y); print(" ");
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print_hex8((uint8_t)mouse_report.v); print(" ");
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print_hex8((uint8_t)mouse_report.h); print("]\n");
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}
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/* PS/2 Mouse Synopsis
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* http://www.computer-engineering.org/ps2mouse/
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*
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* Command:
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* 0xFF: Reset
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* 0xF6: Set Defaults Sampling; rate=100, resolution=4cnt/mm, scaling=1:1, reporting=disabled
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* 0xF5: Disable Data Reporting
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* 0xF4: Enable Data Reporting
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* 0xF3: Set Sample Rate
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* 0xF2: Get Device ID
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* 0xF0: Set Remote Mode
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* 0xEB: Read Data
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* 0xEA: Set Stream Mode
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* 0xE9: Status Request
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* 0xE8: Set Resolution
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* 0xE7: Set Scaling 2:1
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* 0xE6: Set Scaling 1:1
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*
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* Mode:
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* Stream Mode: devices sends the data when it changs its state
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* Remote Mode: host polls the data periodically
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*
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* This code uses Remote Mode and polls the data with Read Data(0xEB).
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*
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* Data format:
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* byte|7 6 5 4 3 2 1 0
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* ----+--------------------------------------------------------------
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* 0|Yovflw Xovflw Ysign Xsign 1 Middle Right Left
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* 1| X movement
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* 2| Y movement
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*/
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