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USBMouse

Table of Contents

  1. Hello World
  2. API
  3. Details
  4. Related

The USBMouse interface is used to emulate a mouse over the USB port. You can choose relative or absolute co-ordinates, and send clicks, button state and scroll wheel movements.

The USB connector should be attached to p31 (D+), p32 (D-) and GND. You can also connect the USB power to VIN to power the mbed when connected.

Hello World

USBMouse Hello World!

#include "mbed.h"
#include "USBMouse.h"

USBMouse mouse;

int main() {
    int16_t x = 0;
    int16_t y = 0;
    int32_t radius = 10;
    int32_t angle = 0;

    while (1) {
        x = cos((double)angle*3.14/180.0)*radius;
        y = sin((double)angle*3.14/180.0)*radius;
        mouse.move(x, y);
        angle += 3;
        wait(0.001);
    }
}

Import programUSBMouse_HelloWorld

USBMouse Hello World

Last commit 01 Mar 2013 by Samuel Mokrani

Currently only available in betamode!

This library is in beta, and only works with the betamode compiler and the beta version of the libraries.

To use these examples, ensure you have enabled /betamode for the compiler, and then import these examples as the basis for your experiments to ensure the beta mbed library is pulled in.

API

Import library
USBDevice - USBMouse Class Reference

Public Member Functions

USBMouse (MOUSE_TYPE mouse_type=REL_MOUSE, uint16_t vendor_id=0x1234, uint16_t product_id=0x0001, uint16_t product_release=0x0001)
Constructor.
bool update (int16_t x, int16_t y, uint8_t buttons, int8_t z)
Write a state of the mouse.
bool move (int16_t x, int16_t y)
Move the cursor to (x, y)
bool press (uint8_t button)
Press one or several buttons.
bool release (uint8_t button)
Release one or several buttons.
bool doubleClick ()
Double click (MOUSE_LEFT)
bool click (uint8_t button)
Click.
bool scroll (int8_t z)
Scrolling.
bool send (HID_REPORT *report)
Send a Report.
bool sendNB (HID_REPORT *report)
Send a Report.
bool read (HID_REPORT *report)
Read a report: blocking.
bool readNB (HID_REPORT *report)
Read a report: non blocking.

Details

You can choose either a relative mouse or an absolute mouse. By default, a USBMouse is a relative mouse. For instance, you can use an absolute mouse to draw a circle:

 #include "mbed.h"
 #include "USBMouse.h"

 USBMouse mouse(ABS_MOUSE);

 #include <math.h>

 int main(void)
 {
   uint16_t x_center = (X_MAX_ABS - X_MIN_ABS)/2;
   uint16_t y_center = (Y_MAX_ABS - Y_MIN_ABS)/2;
   uint16_t x_screen = 0;
   uint16_t y_screen = 0;
   
   uint32_t x_origin = x_center;
   uint32_t y_origin = y_center;
   uint32_t radius = 5000;
   uint32_t angle = 0;

   while (1)
   {
       x_screen = x_origin + cos((double)angle*3.14/180.0)*radius;
       y_screen = y_origin + sin((double)angle*3.14/180.0)*radius;
       
       mouse.move(x_screen, y_screen);
       angle += 3;
       wait(0.01);
   }
 }
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