Chris Styles / m0-USBKeyboard

HID_devices/USBAbsMouse.c@0:e98d1c2b16c6, 2011-10-20 (annotated)

Committer:
chris
Date:
Thu Oct 20 14:07:30 2011 +0000
Revision:
0:e98d1c2b16c6

        

        
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/* USBAbsMouse.c */





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/* USB device example: an absolute mouse */





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/* Copyright (c) 2011 ARM Limited. All rights reserved. */





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#include "stdint.h"





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#include "USBAbsMouse.h"





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/*





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 *  Descriptors





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 */





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uint8_t * USBAbsMouse::ReportDesc() {





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    static uint8_t reportDescriptor[] = {





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        /* Based on Appendix E.10 of "Device Class Definition for Human Interface





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           Devices (HID)" Version 1.11 and modified to use absolute coordinates and a wheel. */





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        USAGE_PAGE(1), 0x01,                    /* Generic Desktop */





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        USAGE(1), 0x02,                         /* Mouse */





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        COLLECTION(1), 0x01,                    /* Application*/





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        USAGE(1), 0x01,                     /* Pointer */





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        COLLECTION(1), 0x00,                /* Physical */





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        USAGE_PAGE(1), 0x01,            /* Generic Desktop */





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        USAGE(1), 0x30,                 /* X */





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        USAGE(1), 0x31,                 /* Y */





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        LOGICAL_MINIMUM(1), 0x00,       /* 0 */





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        LOGICAL_MAXIMUM(2), 0xff, 0x7f, /* 32767 */





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        REPORT_SIZE(1), 0x10,





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        REPORT_COUNT(1), 0x02,





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        INPUT(1), 0x02,                 /* Data, Variable, Absolute */





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        USAGE_PAGE(1), 0x01,            /* Generic Desktop */





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        USAGE(1), 0x38,                 /* scroll */





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        LOGICAL_MINIMUM(1), 0x81,       /* -127 */





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        LOGICAL_MAXIMUM(1), 0x7f,       /* 127 */





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        REPORT_SIZE(1), 0x08,





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        REPORT_COUNT(1), 0x01,





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        INPUT(1), 0x06,                 /* Data, Variable, Relative */





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        USAGE_PAGE(1), 0x09,            /* Buttons */





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        USAGE_MINIMUM(1), 0x01,





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        USAGE_MAXIMUM(1), 0x03,





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        LOGICAL_MINIMUM(1), 0x00,       /* 0 */





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        LOGICAL_MAXIMUM(1), 0x01,       /* 1 */





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        REPORT_COUNT(1), 0x03,





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        REPORT_SIZE(1), 0x01,





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        INPUT(1), 0x02,                 /* Data, Variable, Absolute */





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        REPORT_COUNT(1), 0x01,





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        REPORT_SIZE(1), 0x05,





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        INPUT(1), 0x01,                 /* Constant */





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        END_COLLECTION(0),





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        END_COLLECTION(0)





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    };





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    reportLength = sizeof(reportDescriptor);





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    return reportDescriptor;





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}





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bool USBAbsMouse::update(int16_t x, int16_t y, uint8_t buttons, int8_t z) {





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    HID_REPORT report;





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    report.data[0] = x & 0xff;





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    report.data[1] = (x >> 8) & 0xff;





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    report.data[2] = y & 0xff;





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    report.data[3] = (y >> 8) & 0xff;





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    report.data[4] = -z;





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    report.data[5] = buttons & 0x07;





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    report.length = 6;





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    return USBClass_HID_sendInputReport(EPINT_IN, &report);





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}





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