usb_mouse.c

   1 #include <avr/interrupt.h>
   2 #include <util/delay.h>
   3 #include "usb_mouse.h"
   4 #include "print.h"
   5 #include "debug.h"
   6
   7
   8 static bool is_sent = false;
   9
  10 // which buttons are currently pressed
  11 uint8_t mouse_buttons=0;
  12
  13 // protocol setting from the host.  We use exactly the same report
  14 // either way, so this variable only stores the setting since we
  15 // are required to be able to report which setting is in use.
  16 uint8_t mouse_protocol=1;
  17
  18
  19 // Set the mouse buttons.  To create a "click", 2 calls are needed,
  20 // one to push the button down and the second to release it
  21 int8_t usb_mouse_buttons(uint8_t left, uint8_t middle, uint8_t right)
  22 {
  23         uint8_t mask=0;
  24
  25         if (left) mask |= 1;
  26         if (middle) mask |= 4;
  27         if (right) mask |= 2;
  28         mouse_buttons = mask;
  29         return usb_mouse_move(0, 0, 0, 0);
  30 }
  31
  32 // Move the mouse.  x, y and wheel are -127 to 127.  Use 0 for no movement.
  33 int8_t usb_mouse_move(int8_t x, int8_t y, int8_t wheel, int8_t hwheel)
  34 {
  35         uint8_t intr_state, timeout;
  36
  37         if (!usb_configured()) return -1;
  38         if (x == -128) x = -127;
  39         if (y == -128) y = -127;
  40         if (wheel == -128) wheel = -127;
  41         if (hwheel == -128) hwheel = -127;
  42         intr_state = SREG;
  43         cli();
  44         UENUM = MOUSE_ENDPOINT;
  45         timeout = UDFNUML + 50;
  46         while (1) {
  47                 // are we ready to transmit?
  48                 if (UEINTX & (1<<RWAL)) break;
  49                 SREG = intr_state;
  50                 // has the USB gone offline?
  51                 if (!usb_configured()) return -1;
  52                 // have we waited too long?
  53                 if (UDFNUML == timeout) return -1;
  54                 // get ready to try checking again
  55                 intr_state = SREG;
  56                 cli();
  57                 UENUM = MOUSE_ENDPOINT;
  58         }
  59         UEDATX = mouse_buttons;
  60         UEDATX = x;
  61         UEDATX = y;
  62         UEDATX = wheel;
  63         UEDATX = hwheel;
  64
  65         UEINTX = 0x3A;
  66         SREG = intr_state;
  67         is_sent = true;
  68         return 0;
  69 }
  70
  71 void usb_mouse_clear(void) {
  72     is_sent = false;
  73 }
  74
  75 bool usb_mouse_is_sent(void) {
  76     return is_sent;
  77 }
  78
  79 void usb_mouse_print(int8_t mouse_x, int8_t mouse_y, int8_t wheel_v, int8_t wheel_h) {
  80     if (!debug_mouse) return;
  81     print("mouse btn|x y v h: ");
  82     phex(mouse_buttons); print("|");
  83     phex(mouse_x); print(" ");
  84     phex(mouse_y); print(" ");
  85     phex(wheel_v); print(" ");
  86     phex(wheel_h); print("\n");
  87 }