USB::initialise().cpp

void USB::initialise()
{
    /* Configure the USB0 host pins(USB0_OVRCURA and USB0_VBUSEN) needed */
    // protection got turned off in hardware setup
//    MPC.PWPR.BIT.B0WI = 0;          // Enable write to PFSWE bit
//    MPC.PWPR.BIT.PFSWE = 1;         // Disable write protection to PFS registers
    /* Use this for GR-Sakura and RSK */
    PORT1.PDR.BIT.B6 = 1;           // P16 is an output pin
    PORT1.PCR.BIT.B6 = 1;           // P16 is an output pin
    MPC.P16PFS.BIT.PSEL = 0x12;     // Configure as USB0_VBUSEN pin
    PORT1.PMR.BIT.B6 = 1;           // Link the port pin to the peripheral

    /* Use this for GR-Sakura */
    //Added 2015.12.08 Yuuichi Akagawa
    /* Disable USB0_DPUPE */
    MPC.P14PFS.BIT.PSEL = 0;     // Configure as GPIO pin
    PORT1.PMR.BIT.B4 = 0;
    PORT1.PDR.BIT.B4 = 0;
    PORT1.PODR.BIT.B4 = 0;

    /* Short J12 and J14 on the sakura board. Following code will
     * enable the pull down resistor lines */
    PORT2.PDR.BIT.B2 = 1;     //required?(When Short J13 and J15)
    PORT2.PODR.BIT.B2 = 0;    //required?(When Short J13 and J15)

    PORT2.PDR.BIT.B5 = 1;     //required?(When Short J13 and J15)
    PORT2.PODR.BIT.B5 = 0;    //required?(When Short J13 and J15)

    // protection got turned off in hardware setup
//    MPC.PWPR.BIT.PFSWE = 0;         // Enable write protection to PFS registers
//    MPC.PWPR.BIT.B0WI = 0;          // Disable write to PFSWE bit
    /* Disable register protection */
//    SYSTEM.PRCR.WORD = 0xA50B; // protection got turned off in hardware setup
    /* Enable the clock to the USB module */
    MSTP(USB0) = 0;
    USBC.DPUSR0R.BIT.FIXPHY0     = 0;        // USB0  The outputs are fixed in normal mode and on return from deep software standby mode

    /* Enable USB0 */
//    USB0.SYSCFG.WORD = 0x0041;
    USB0.SYSCFG.WORD = 0;  //It temporarily disabled. Enable at R_USBH_Initialise()

    /* Enable register protection */
//    SYSTEM.PRCR.WORD = 0xA500; // protection got turned off in hardware setup
#if defined(TESTING)
    /* Open the host driver */
    usbhOpen(&gUsbHc0);
    /* Add the root ports to the driver */
    usbhAddRootPort(&gUsbHc0, (PUSBPC)&gcRootPort0);
#endif
    /* Initialize the USB hardware */
    R_USBH_Initialise(&USB0);
#if !defined(TESTING)
    /* Start the enumeration timer. (Starts on construction) */
    if(enumTimer==NULL)
    {
        enumTimer = new System_Timer(1,(void(*)(void*))enumRun,NULL,TIMER_RELOAD);
    }
#endif

    //Added 2015.12.08 Yuuichi Akagawa
    /* Clear all USB interrupts */
    USB0.INTSTS0.WORD = 0;
    USB0.INTSTS1.WORD = 0;

    /* Set USB interrupt priority */
    IPR(USB,USBR0) = 14;
    IPR(USB0,D0FIFO0) = 14;
    IPR(USB0,D1FIFO0) = 14;
    IPR(USB0,USBI0) = 14;

    /* Enable the attach interrupts for each root port*/
    IEN(USB0, USBI0) = 1;
    IEN(USB, USBR0) = 1;
    IEN(USB0, D0FIFO0) = 1;
    IEN(USB0, D1FIFO0) = 1;
    USB0.INTENB1.WORD |= BIT_11;
}