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@@ -20,7 +20,8 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. |
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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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#include "report.h" |
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#include "host.h" |
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#define PS2_MOUSE_DEBUG |
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#ifdef PS2_MOUSE_DEBUG |
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@@ -33,20 +34,17 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. |
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#endif |
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bool ps2_mouse_enable = true; |
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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 report_mouse_t mouse_report = {}; |
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static uint8_t ps2_mouse_btn_prev = 0; |
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static void ps2_mouse_print_raw_data(void); |
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static void ps2_mouse_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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if (!ps2_mouse_enable) return 1; |
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ps2_host_init(); |
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_delay_ms(1000); // wait for powering up |
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@@ -79,85 +77,119 @@ uint8_t ps2_mouse_init(void) { |
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return 0; |
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} |
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uint8_t ps2_mouse_read(void) |
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/* scroll support |
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* TODO: should be build option |
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*/ |
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#define PS2_MOUSE_SCROLL_BUTTON 0x04 |
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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 (!ps2_mouse_enable) return 1; |
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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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rcv = ps2_host_send(0xEB); |
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ps2_mouse_print_raw_data(); |
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if(rcv==0xFA) { |
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ps2_mouse_btn = ps2_host_recv_response(); |
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ps2_mouse_x = ps2_host_recv_response(); |
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ps2_mouse_y = ps2_host_recv_response(); |
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} |
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return 0; |
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} |
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buttons_prev = mouse_report.buttons; |
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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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// 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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#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_enable) return; |
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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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// 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 ((mouse_report.buttons & PS2_MOUSE_SCROLL_BUTTON) == PS2_MOUSE_SCROLL_BUTTON) { |
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if (scroll_state == SCROLL_NONE) scroll_state = SCROLL_BTN; |
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// doesn't send Scroll Button |
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mouse_report.buttons &= ~PS2_MOUSE_SCROLL_BUTTON; |
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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/2; |
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mouse_report.h = mouse_report.x/2; |
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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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} 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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} else if (scroll_state == SCROLL_BTN && |
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(mouse_report.buttons & PS2_MOUSE_SCROLL_BUTTON) == 0) { |
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scroll_state = SCROLL_NONE; |
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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_BUTTON; |
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host_mouse_send(&mouse_report); |
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_delay_ms(100); |
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usb_mouse_send(0,0,0,0, 0); |
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mouse_report.buttons &= ~PS2_MOUSE_SCROLL_BUTTON; |
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host_mouse_send(&mouse_report); |
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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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scroll_state = SCROLL_NONE; |
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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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host_mouse_send(&mouse_report); |
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} |
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ps2_mouse_print_usb_data(); |
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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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// 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 ps2_mouse_print_raw_data(void) |
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{ |
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if (!debug_mouse) return; |
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print("ps2_mouse raw [btn|x y]: ["); |
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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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} |
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void ps2_mouse_print(void) |
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static void ps2_mouse_print_usb_data(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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print("ps2_mouse usb [btn|x y v h]: ["); |
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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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@@ -189,6 +221,6 @@ void ps2_mouse_print(void) |
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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(0-255) |
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* 2| Y movement(0-255) |
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* 1| X movement |
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* 2| Y movement |
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*/ |