File content as of revision 1:e089be2a6aa1:

/* Keyboard_RelMouse.c */

/* USB device example: Keyboard and a relative mouse */
/* Copyright (c) 2011 ARM Limited. All rights reserved. */

#include "stdint.h"

#include "USBMouseKeyboard.h"

uint8_t * USBMouseKeyboard::ReportDesc() {
    static uint8_t reportDescriptor[] = {
        /* Keyboard */
        USAGE_PAGE(1),      0x01,
        USAGE(1),           0x06,
        COLLECTION(1),      0x01,
        REPORT_ID(1),       REPORT_ID_KEYBOARD,
        USAGE_PAGE(1),      0x07,
        USAGE_MINIMUM(1),       0xE0,
        USAGE_MAXIMUM(1),       0xE7,
        LOGICAL_MINIMUM(1),     0x00,
        LOGICAL_MAXIMUM(1),     0x01,
        REPORT_SIZE(1),     0x01,
        REPORT_COUNT(1),    0x08,
        INPUT(1),           0x02,
        REPORT_COUNT(1),    0x01,
        REPORT_SIZE(1),     0x08,
        INPUT(1),           0x01,
        REPORT_COUNT(1),    0x05,
        REPORT_SIZE(1),     0x01,
        USAGE_PAGE(1),      0x08,
        USAGE_MINIMUM(1),       0x01,
        USAGE_MAXIMUM(1),       0x05,
        OUTPUT(1),          0x02,
        REPORT_COUNT(1),    0x01,
        REPORT_SIZE(1),     0x03,
        OUTPUT(1),          0x01,
        REPORT_COUNT(1),    0x06,
        REPORT_SIZE(1),     0x08,
        LOGICAL_MINIMUM(1),     0x00,
        LOGICAL_MAXIMUM(2),     0xff, 0x00,
        USAGE_PAGE(1),      0x07,
        USAGE_MINIMUM(1),       0x00,
        USAGE_MAXIMUM(2),       0xff, 0x00,
        INPUT(1),           0x00,
        END_COLLECTION(0),

        /* Mouse */
        USAGE_PAGE(1),      0x01,           /* Generic Desktop */
        USAGE(1),           0x02,           /* Mouse */
        COLLECTION(1),      0x01,           /* Application*/
        USAGE(1),           0x01,           /* Pointer */
        COLLECTION(1),      0x00,           /* Physical */
        REPORT_ID(1),       REPORT_ID_MOUSE,
        REPORT_COUNT(1),    0x03,
        REPORT_SIZE(1),     0x01,
        USAGE_PAGE(1),      0x09,           /* Buttons */
        USAGE_MINIMUM(1),       0x1,
        USAGE_MAXIMUM(1),       0x3,
        LOGICAL_MINIMUM(1),     0x00,
        LOGICAL_MAXIMUM(1),     0x01,
        INPUT(1),           0x02,
        REPORT_COUNT(1),    0x01,
        REPORT_SIZE(1),     0x05,
        INPUT(1),           0x01,
        REPORT_COUNT(1),    0x03,
        REPORT_SIZE(1),     0x08,
        USAGE_PAGE(1),      0x01,
        USAGE(1),           0x30,           /* X */
        USAGE(1),           0x31,           /* Y */
        USAGE(1),           0x38,           /* scroll */
        LOGICAL_MINIMUM(1),     0x81,
        LOGICAL_MAXIMUM(1),     0x7f,
        INPUT(1),           0x06,
        END_COLLECTION(0),
        END_COLLECTION(0),


        USAGE_PAGE(1), 0x0c,                        /* USAGE_PAGE (Consumer Devices) */
        USAGE(1), 0x01,                             /* USAGE (Consumer Control) */
        COLLECTION(1), 0x01,                        /* COLLECTION (Application) */
        REPORT_ID(1),       REPORT_ID_VOLUME,
        LOGICAL_MINIMUM(1), 0x00,                   /*   LOGICAL_MINIMUM (0) */
        LOGICAL_MAXIMUM(1), 0x01,                   /*   LOGICAL_MAXIMUM (1) */
        USAGE(1), 0xe9,                             /*   Volume Up */
        USAGE(1), 0xea,                             /*   Volume Down */
        REPORT_SIZE(1), 0x01,
        REPORT_COUNT(1), 0x02,
        INPUT(1), 0x06,                             /*   INPUT (Data,Var,Rel) */
        USAGE(1), 0xe2,                             /*   Mute */
        REPORT_COUNT(1), 0x01,                      /*   REPORT_COUNT (1) */
        INPUT(1), 0x06,                             /*   INPUT (Data,Var,Rel) */
        REPORT_COUNT(1), 0x05,                      /*   REPORT_COUNT (5) */
        INPUT(1), 0x07,                             /*   INPUT (Cnst,Var,Rel) */
        END_COLLECTION(0),                          /* END_COLLECTION */
    };
    reportLength = sizeof(reportDescriptor);
    return reportDescriptor;
}


bool USBMouseKeyboard::update(int16_t x, int16_t y, uint8_t button, int8_t z) {
    while (x > 127) {
        if (!mouseWrite(127, 0, button, z)) return false;
        x = x - 127;
    }
    while (x < -128) {
        if (!mouseWrite(-128, 0, button, z)) return false;
        x = x + 128;
    }
    while (y > 127) {
        if (!mouseWrite(0, 127, button, z)) return false;
        y = y - 127;
    }
    while (y < -128) {
        if (!mouseWrite(0, -128, button, z)) return false;
        y = y + 128;
    }
    return mouseWrite(x, y, button, z);
}

bool USBMouseKeyboard::mouseWrite(int8_t x, int8_t y, uint8_t buttons, int8_t z) {
    HID_REPORT report;

    report.data[0] = REPORT_ID_MOUSE;
    report.data[1] = buttons & 0x07;
    report.data[2] = x;
    report.data[3] = y;
    report.data[4] = -z; /* >0 to scroll down, <0 to scroll up */

    report.length = 5;

    return USBClass_HID_sendInputReport(EPINT_IN, &report);
}