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 uint8_t usb_mouse_protocol=1;
   9
  10
  11 int8_t usb_mouse_send(int8_t x, int8_t y, int8_t wheel_v, int8_t wheel_h, uint8_t buttons)
  12 {
  13         uint8_t intr_state, timeout;
  14
  15         if (!usb_configured()) return -1;
  16         if (x == -128) x = -127;
  17         if (y == -128) y = -127;
  18         if (wheel_v == -128) wheel_v = -127;
  19         if (wheel_h == -128) wheel_h = -127;
  20         intr_state = SREG;
  21         cli();
  22         UENUM = MOUSE_ENDPOINT;
  23         timeout = UDFNUML + 50;
  24         while (1) {
  25                 // are we ready to transmit?
  26                 if (UEINTX & (1<<RWAL)) break;
  27                 SREG = intr_state;
  28                 // has the USB gone offline?
  29                 if (!usb_configured()) return -1;
  30                 // have we waited too long?
  31                 if (UDFNUML == timeout) return -1;
  32                 // get ready to try checking again
  33                 intr_state = SREG;
  34                 cli();
  35                 UENUM = MOUSE_ENDPOINT;
  36         }
  37         UEDATX = buttons;
  38         UEDATX = x;
  39         UEDATX = y;
  40         if (usb_mouse_protocol) {
  41             UEDATX = wheel_v;
  42             UEDATX = wheel_h;
  43         }
  44
  45         UEINTX = 0x3A;
  46         SREG = intr_state;
  47         return 0;
  48 }
  49
  50 void usb_mouse_print(int8_t x, int8_t y, int8_t wheel_v, int8_t wheel_h, uint8_t buttons) {
  51     if (!debug_mouse) return;
  52     print("usb_mouse[btn|x y v h]: ");
  53     phex(buttons); print("|");
  54     phex(x); print(" ");
  55     phex(y); print(" ");
  56     phex(wheel_v); print(" ");
  57     phex(wheel_h); print("\n");
  58 }