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@ -18,63 +18,99 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. |
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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 "report.h" |
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#include "debug.h" |
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#include "ps2.h" |
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#ifndef PS2_INIT_DELAY |
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#define PS2_INIT_DELAY 1000 |
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#endif |
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/* ============================= MACROS ============================ */ |
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#define PS2_MOUSE_SEND(command, message) \ |
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do { \ |
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uint8_t rcv = ps2_host_send(command); \ |
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if (debug_mouse) { \ |
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print((message)); \ |
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xprintf(" command: %X, result: %X, error: %X \n", command, rcv, ps2_error); \ |
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} \ |
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} while(0) |
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#define PS2_MOUSE_SEND_SAFE(command, message) \ |
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do { \ |
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if (PS2_MOUSE_STREAM_MODE == ps2_mouse_mode) { \ |
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ps2_mouse_disable_data_reporting(); \ |
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} \ |
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PS2_MOUSE_SEND(command, message); \ |
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if (PS2_MOUSE_STREAM_MODE == ps2_mouse_mode) { \ |
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ps2_mouse_enable_data_reporting(); \ |
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} \ |
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} while(0) |
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#define PS2_MOUSE_SET_SAFE(command, value, message) \ |
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do { \ |
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if (PS2_MOUSE_STREAM_MODE == ps2_mouse_mode) { \ |
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ps2_mouse_disable_data_reporting(); \ |
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} \ |
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PS2_MOUSE_SEND(command, message); \ |
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PS2_MOUSE_SEND(value, "Sending value"); \ |
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if (PS2_MOUSE_STREAM_MODE == ps2_mouse_mode) { \ |
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ps2_mouse_enable_data_reporting(); \ |
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} \ |
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} while(0) |
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#define PS2_MOUSE_RECEIVE(message) \ |
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do { \ |
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uint8_t rcv = ps2_host_recv_response(); \ |
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if (debug_mouse) { \ |
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print((message)); \ |
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xprintf(" result: %X, error: %X \n", rcv, ps2_error); \ |
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} \ |
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} while(0) |
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static enum ps2_mouse_mode_e { |
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PS2_MOUSE_STREAM_MODE, |
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PS2_MOUSE_REMOTE_MODE, |
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} ps2_mouse_mode = PS2_MOUSE_STREAM_MODE; |
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static report_mouse_t mouse_report = {}; |
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static inline void ps2_mouse_print_report(report_mouse_t *mouse_report); |
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static inline void ps2_mouse_convert_report_to_hid(report_mouse_t *mouse_report); |
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static inline void ps2_mouse_clear_report(report_mouse_t *mouse_report); |
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static inline void ps2_mouse_enable_scrolling(void); |
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static inline void ps2_mouse_scroll_button_task(report_mouse_t *mouse_report); |
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static void print_usb_data(void); |
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/* ============================= IMPLEMENTATION ============================ */ |
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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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void ps2_mouse_init(void) { |
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ps2_host_init(); |
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_delay_ms(PS2_INIT_DELAY); // wait for powering up |
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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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PS2_MOUSE_SEND(PS2_MOUSE_RESET, "ps2_mouse_init: sending reset"); |
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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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PS2_MOUSE_RECEIVE("ps2_mouse_init: read BAT"); |
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PS2_MOUSE_RECEIVE("ps2_mouse_init: read DevID"); |
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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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#ifdef PS2_MOUSE_USE_REMOTE_MODE |
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ps2_mouse_set_remote_mode(); |
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#else |
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ps2_mouse_enable_data_reporting(); |
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#endif |
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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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#ifdef PS2_MOUSE_ENABLE_SCROLLING |
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ps2_mouse_enable_scrolling(); |
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#endif |
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return 0; |
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#ifdef PS2_MOUSE_USE_2_1_SCALING |
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ps2_mouse_set_scaling_2_1(); |
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#endif |
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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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void ps2_mouse_task(void) { |
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static uint8_t buttons_prev = 0; |
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/* receives packet from mouse */ |
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@ -82,142 +118,169 @@ void ps2_mouse_task(void) |
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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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mouse_report.x = ps2_host_recv_response() * PS2_MOUSE_X_MULTIPLIER; |
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mouse_report.y = ps2_host_recv_response() * PS2_MOUSE_Y_MULTIPLIER; |
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#ifdef PS2_MOUSE_ENABLE_SCROLLING |
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mouse_report.v = -(ps2_host_recv_response() & PS2_MOUSE_SCROLL_MASK) * PS2_MOUSE_V_MULTIPLIER; |
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#endif |
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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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xprintf("%ud ", timer_read()); |
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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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/* if mouse moves or buttons state changes */ |
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if (mouse_report.x || mouse_report.y || |
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if (mouse_report.x || mouse_report.y || mouse_report.v || |
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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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#ifdef PS2_MOUSE_DEBUG_RAW |
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// Used to debug raw ps2 bytes from mouse |
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ps2_mouse_print_report(&mouse_report); |
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#endif |
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buttons_prev = mouse_report.buttons; |
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ps2_mouse_convert_report_to_hid(&mouse_report); |
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#if PS2_MOUSE_SCROLL_BTN_MASK |
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ps2_mouse_scroll_button_task(&mouse_report); |
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#endif |
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#ifdef PS2_MOUSE_DEBUG_HID |
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// Used to debug the bytes sent to the host |
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ps2_mouse_print_report(&mouse_report); |
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#endif |
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host_mouse_send(&mouse_report); |
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} |
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ps2_mouse_clear_report(&mouse_report); |
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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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void ps2_mouse_disable_data_reporting(void) { |
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PS2_MOUSE_SEND(PS2_MOUSE_DISABLE_DATA_REPORTING, "ps2 mouse disable data reporting"); |
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} |
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// remove sign and overflow flags |
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mouse_report.buttons &= PS2_MOUSE_BTN_MASK; |
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void ps2_mouse_enable_data_reporting(void) { |
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PS2_MOUSE_SEND(PS2_MOUSE_ENABLE_DATA_REPORTING, "ps2 mouse enable data reporting"); |
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} |
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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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void ps2_mouse_set_remote_mode(void) { |
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PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_REMOTE_MODE, "ps2 mouse set remote mode"); |
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ps2_mouse_mode = PS2_MOUSE_REMOTE_MODE; |
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} |
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void ps2_mouse_set_stream_mode(void) { |
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PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_STREAM_MODE, "ps2 mouse set stream mode"); |
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ps2_mouse_mode = PS2_MOUSE_STREAM_MODE; |
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} |
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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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void ps2_mouse_set_scaling_2_1(void) { |
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PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_SCALING_2_1, "ps2 mouse set scaling 2:1"); |
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} |
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void ps2_mouse_set_scaling_1_1(void) { |
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PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_SCALING_1_1, "ps2 mouse set scaling 1:1"); |
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} |
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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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void ps2_mouse_set_resolution(ps2_mouse_resolution_t resolution) { |
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PS2_MOUSE_SET_SAFE(PS2_MOUSE_SET_RESOLUTION, resolution, "ps2 mouse set resolution"); |
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} |
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void ps2_mouse_set_sample_rate(ps2_mouse_sample_rate_t sample_rate) { |
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PS2_MOUSE_SET_SAFE(PS2_MOUSE_SET_SAMPLE_RATE, sample_rate, "ps2 mouse set sample rate"); |
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} |
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/* ============================= HELPERS ============================ */ |
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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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static inline void ps2_mouse_convert_report_to_hid(report_mouse_t *mouse_report) { |
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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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} |
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static void print_usb_data(void) |
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{ |
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static inline void ps2_mouse_clear_report(report_mouse_t *mouse_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 inline void ps2_mouse_print_report(report_mouse_t *mouse_report) { |
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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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print("ps2_mouse: ["); |
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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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static inline void ps2_mouse_enable_scrolling(void) { |
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PS2_MOUSE_SEND(PS2_MOUSE_SET_SAMPLE_RATE, "Initiaing scroll wheel enable: Set sample rate"); |
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PS2_MOUSE_SEND(200, "200"); |
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PS2_MOUSE_SEND(PS2_MOUSE_SET_SAMPLE_RATE, "Set sample rate"); |
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PS2_MOUSE_SEND(100, "100"); |
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PS2_MOUSE_SEND(PS2_MOUSE_SET_SAMPLE_RATE, "Set sample rate"); |
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PS2_MOUSE_SEND(80, "80"); |
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PS2_MOUSE_SEND(PS2_MOUSE_GET_DEVICE_ID, "Finished enabling scroll wheel"); |
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_delay_ms(20); |
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} |
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#define PRESS_SCROLL_BUTTONS mouse_report->buttons |= (PS2_MOUSE_SCROLL_BTN_MASK) |
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#define RELEASE_SCROLL_BUTTONS mouse_report->buttons &= ~(PS2_MOUSE_SCROLL_BTN_MASK) |
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static inline void ps2_mouse_scroll_button_task(report_mouse_t *mouse_report) { |
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static enum { |
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SCROLL_NONE, |
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SCROLL_BTN, |
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SCROLL_SENT, |
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} scroll_state = SCROLL_NONE; |
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static uint16_t scroll_button_time = 0; |
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if (PS2_MOUSE_SCROLL_BTN_MASK == (mouse_report->buttons & (PS2_MOUSE_SCROLL_BTN_MASK))) { |
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// All scroll buttons are pressed |
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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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// If the mouse has moved, update the report to scroll instead of move the mouse |
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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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} |
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} else if (0 == (PS2_MOUSE_SCROLL_BTN_MASK & mouse_report->buttons)) { |
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// None of the scroll buttons are pressed |
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#if PS2_MOUSE_SCROLL_BTN_SEND |
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if (scroll_state == SCROLL_BTN |
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&& timer_elapsed(scroll_button_time) < PS2_MOUSE_SCROLL_BTN_SEND) { |
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PRESS_SCROLL_BUTTONS; |
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host_mouse_send(mouse_report); |
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_delay_ms(100); |
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RELEASE_SCROLL_BUTTONS; |
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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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/* 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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RELEASE_SCROLL_BUTTONS; |
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} |