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