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- #include <avr/interrupt.h>
- #include <util/delay.h>
- #include "usb_mouse.h"
-
-
- // which buttons are currently pressed
- uint8_t mouse_buttons=0;
-
- // protocol setting from the host. We use exactly the same report
- // either way, so this variable only stores the setting since we
- // are required to be able to report which setting is in use.
- uint8_t mouse_protocol=1;
-
-
- // Set the mouse buttons. To create a "click", 2 calls are needed,
- // one to push the button down and the second to release it
- int8_t usb_mouse_buttons(uint8_t left, uint8_t middle, uint8_t right)
- {
- uint8_t mask=0;
-
- if (left) mask |= 1;
- if (middle) mask |= 4;
- if (right) mask |= 2;
- mouse_buttons = mask;
- return usb_mouse_move(0, 0, 0, 0);
- }
-
- // Move the mouse. x, y and wheel are -127 to 127. Use 0 for no movement.
- int8_t usb_mouse_move(int8_t x, int8_t y, int8_t wheel, int8_t hwheel)
- {
- uint8_t intr_state, timeout;
-
- if (!usb_configured()) return -1;
- if (x == -128) x = -127;
- if (y == -128) y = -127;
- if (wheel == -128) wheel = -127;
- if (hwheel == -128) hwheel = -127;
- intr_state = SREG;
- cli();
- UENUM = MOUSE_ENDPOINT;
- timeout = UDFNUML + 50;
- while (1) {
- // are we ready to transmit?
- if (UEINTX & (1<<RWAL)) break;
- SREG = intr_state;
- // has the USB gone offline?
- if (!usb_configured()) return -1;
- // have we waited too long?
- if (UDFNUML == timeout) return -1;
- // get ready to try checking again
- intr_state = SREG;
- cli();
- UENUM = MOUSE_ENDPOINT;
- }
- UEDATX = mouse_buttons;
- UEDATX = x;
- UEDATX = y;
- UEDATX = wheel;
- UEDATX = hwheel;
-
- UEINTX = 0x3A;
- SREG = intr_state;
- return 0;
- }
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