162 lines
4.1 KiB
C
162 lines
4.1 KiB
C
#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 "usb_mouse.h"
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#define PS2_MOUSE_DEBUG
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#ifdef PS2_MOUSE_DEBUG
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# include "print.h"
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# include "debug.h"
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#else
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# define print(s)
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# define phex(h)
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# define phex16(h)
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#endif
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/*
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TODO
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----
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- Error handling
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- Stream mode
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- Tracpoint command support: needed
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- Middle button + move = Wheel traslation
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*/
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uint8_t ps2_mouse_x = 0;
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uint8_t ps2_mouse_y = 0;
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uint8_t ps2_mouse_btn = 0;
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uint8_t ps2_mouse_error_count = 0;
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static uint8_t ps2_mouse_btn_prev = 0;
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void ps2_mouse_init(void) {
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uint8_t rcv;
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// Reset
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rcv = ps2_host_send(0xFF);
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print("ps2_mouse_init: send 0xFF: ");
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phex(ps2_error); print("\n");
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// ACK
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rcv = ps2_host_recv();
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print("ps2_mouse_init: read ACK: ");
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phex(rcv); phex(ps2_error); print("\n");
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// BAT takes some time
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_delay_ms(100);
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rcv = ps2_host_recv();
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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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// Device ID
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rcv = ps2_host_recv();
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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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// Enable data reporting
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ps2_host_send(0xF4);
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print("ps2_mouse_init: send 0xF4: ");
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phex(ps2_error); print("\n");
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// ACK
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rcv = ps2_host_recv();
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print("ps2_mouse_init: read ACK: ");
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phex(rcv); phex(ps2_error); print("\n");
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// Set Remote mode
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ps2_host_send(0xF0);
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print("ps2_mouse_init: send 0xF0: ");
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phex(ps2_error); print("\n");
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// ACK
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rcv = ps2_host_recv();
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print("ps2_mouse_init: read ACK: ");
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phex(rcv); phex(ps2_error); print("\n");
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if (ps2_error) ps2_mouse_error_count++;
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}
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/*
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Data format:
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bit: 7 6 5 4 3 2 1 0
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-----------------------------------------------------------------------
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0 btn: Yovflw Xovflw Ysign Xsign 1 Middle Right Left
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1 x: X movement(0-255)
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2 y: Y movement(0-255)
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*/
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void ps2_mouse_read(void)
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{
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uint8_t rcv;
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ps2_host_send(0xEB);
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rcv=ps2_host_recv();
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if(rcv==0xFA) {
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ps2_mouse_btn = ps2_host_recv();
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ps2_mouse_x = ps2_host_recv();
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ps2_mouse_y = ps2_host_recv();
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}
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if (ps2_error) ps2_mouse_error_count++;
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}
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bool ps2_mouse_changed(void)
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{
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return (ps2_mouse_x || ps2_mouse_y || (ps2_mouse_btn & PS2_MOUSE_BTN_MASK) != ps2_mouse_btn_prev);
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}
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#define PS2_MOUSE_SCROLL_BUTTON 0x04
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void ps2_mouse_usb_send(void)
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{
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static bool scrolled = false;
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if (ps2_mouse_changed()) {
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int8_t x, y, v, h;
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x = y = v = h = 0;
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// convert scale of X, Y: PS/2(-256/255) -> USB(-127/127)
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if (ps2_mouse_btn & (1<<PS2_MOUSE_X_SIGN))
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x = ps2_mouse_x > 128 ? (int8_t)ps2_mouse_x : -127;
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else
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x = ps2_mouse_x < 128 ? (int8_t)ps2_mouse_x : 127;
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if (ps2_mouse_btn & (1<<PS2_MOUSE_Y_SIGN))
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y = ps2_mouse_y > 128 ? (int8_t)ps2_mouse_y : -127;
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else
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y = ps2_mouse_y < 128 ? (int8_t)ps2_mouse_y : 127;
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// Y is needed to reverse
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y = -y;
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if (ps2_mouse_btn & PS2_MOUSE_SCROLL_BUTTON) {
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// scroll
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if (x > 0 || x < 0) h = (x > 64 ? 64 : (x < -64 ? -64 :x));
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if (y > 0 || y < 0) v = (y > 64 ? 64 : (y < -64 ? -64 :y));
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if (h || v) {
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scrolled = true;
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usb_mouse_send(0,0, -v/16, h/16, 0);
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_delay_ms(100);
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}
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} else if (!scrolled && (ps2_mouse_btn_prev & PS2_MOUSE_SCROLL_BUTTON)) {
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usb_mouse_send(0,0,0,0, PS2_MOUSE_SCROLL_BUTTON);
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_delay_ms(100);
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usb_mouse_send(0,0,0,0, 0);
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} else {
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scrolled = false;
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usb_mouse_send(x, y, 0, 0, ps2_mouse_btn & PS2_MOUSE_BTN_MASK);
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}
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ps2_mouse_btn_prev = (ps2_mouse_btn & PS2_MOUSE_BTN_MASK);
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ps2_mouse_print();
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}
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ps2_mouse_x = 0;
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ps2_mouse_y = 0;
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ps2_mouse_btn = 0;
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}
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void ps2_mouse_print(void)
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{
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if (!debug_mouse) return;
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print("ps2_mouse[btn|x y]: ");
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phex(ps2_mouse_btn); print("|");
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phex(ps2_mouse_x); print(" ");
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phex(ps2_mouse_y); print("\n");
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}
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