USBAbsMouse.c

00001 /* USBAbsMouse.c */
00002 
00003 /* USB device example: an absolute mouse */
00004 /* Copyright (c) 2011 ARM Limited. All rights reserved. */
00005 
00006 #include "stdint.h"
00007 
00008 #include "USBAbsMouse.h"
00009 
00010 /*
00011  *  Descriptors
00012  */
00013 
00014 uint8_t * USBAbsMouse::ReportDesc() {
00015     static uint8_t reportDescriptor[] = {
00016 
00017         /* Based on Appendix E.10 of "Device Class Definition for Human Interface
00018            Devices (HID)" Version 1.11 and modified to use absolute coordinates and a wheel. */
00019 
00020         USAGE_PAGE(1), 0x01,                    /* Generic Desktop */
00021         USAGE(1), 0x02,                         /* Mouse */
00022         COLLECTION(1), 0x01,                    /* Application*/
00023         USAGE(1), 0x01,                     /* Pointer */
00024         COLLECTION(1), 0x00,                /* Physical */
00025 
00026         USAGE_PAGE(1), 0x01,            /* Generic Desktop */
00027         USAGE(1), 0x30,                 /* X */
00028         USAGE(1), 0x31,                 /* Y */
00029         LOGICAL_MINIMUM(1), 0x00,       /* 0 */
00030         LOGICAL_MAXIMUM(2), 0xff, 0x7f, /* 32767 */
00031         REPORT_SIZE(1), 0x10,
00032         REPORT_COUNT(1), 0x02,
00033         INPUT(1), 0x02,                 /* Data, Variable, Absolute */
00034 
00035         USAGE_PAGE(1), 0x01,            /* Generic Desktop */
00036         USAGE(1), 0x38,                 /* scroll */
00037         LOGICAL_MINIMUM(1), 0x81,       /* -127 */
00038         LOGICAL_MAXIMUM(1), 0x7f,       /* 127 */
00039         REPORT_SIZE(1), 0x08,
00040         REPORT_COUNT(1), 0x01,
00041         INPUT(1), 0x06,                 /* Data, Variable, Relative */
00042 
00043         USAGE_PAGE(1), 0x09,            /* Buttons */
00044         USAGE_MINIMUM(1), 0x01,
00045         USAGE_MAXIMUM(1), 0x03,
00046         LOGICAL_MINIMUM(1), 0x00,       /* 0 */
00047         LOGICAL_MAXIMUM(1), 0x01,       /* 1 */
00048         REPORT_COUNT(1), 0x03,
00049         REPORT_SIZE(1), 0x01,
00050         INPUT(1), 0x02,                 /* Data, Variable, Absolute */
00051         REPORT_COUNT(1), 0x01,
00052         REPORT_SIZE(1), 0x05,
00053         INPUT(1), 0x01,                 /* Constant */
00054 
00055         END_COLLECTION(0),
00056         END_COLLECTION(0)
00057     };
00058     reportLength = sizeof(reportDescriptor);
00059     return reportDescriptor;
00060 }
00061 
00062 
00063 bool USBAbsMouse::update(int16_t x, int16_t y, uint8_t buttons, int8_t z) {
00064     HID_REPORT report;
00065 
00066     report.data[0] = x & 0xff;
00067     report.data[1] = (x >> 8) & 0xff;
00068     report.data[2] = y & 0xff;
00069     report.data[3] = (y >> 8) & 0xff;
00070     report.data[4] = -z;
00071     report.data[5] = buttons & 0x07;
00072 
00073     report.length = 6;
00074 
00075     return USBClass_HID_sendInputReport(EPINT_IN, &report);
00076 }
00077 
00078