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authortmk2010-09-30 14:17:01 +0900
committertmk2010-09-30 14:50:23 +0900
commitd3b1af9572e123c939fc355474bf12402c86d292 (patch)
tree5c3f18f6af2bd7ed0333b7f5ed8dd16c4fa69245 /usb_mouse.c
parente7c6839d2d17dd084c8bea1dd43208b3144979d2 (diff)
add mouse function.
Diffstat (limited to 'usb_mouse.c')
-rw-r--r--usb_mouse.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/usb_mouse.c b/usb_mouse.c
new file mode 100644
index 000000000..539f2edd3
--- /dev/null
+++ b/usb_mouse.c
@@ -0,0 +1,62 @@
+#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);
+}
+
+// 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)
+{
+ 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;
+ 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;
+ UEINTX = 0x3A;
+ SREG = intr_state;
+ return 0;
+}
+