tinyUSB/tinyusb/hal/hal_lpc13uxx.c

/*
 * hal_lpc13uxx.c
 *
 *  Created on: Dec 2, 2012
 *      Author: hathach
 */

/*
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 * Copyright (c) 2013, hathach (tinyusb.net)
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
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 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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 * This file is part of the tiny usb stack.
 */

#include "common/common.h"
#include "hal.h"

#if MCU == MCU_LPC13UXX

tusb_error_t hal_init()
{
	// TODO usb abstract later
  /* Enable AHB clock to the USB block and USB RAM. */
  LPC_SYSCON->SYSAHBCLKCTRL |= ((0x1<<14) | (0x1<<27));

  /* Pull-down is needed, or internally, VBUS will be floating. This is to
  address the wrong status in VBUSDebouncing bit in CmdStatus register.  */
  LPC_IOCON->PIO0_3   &= ~0x1F;
  LPC_IOCON->PIO0_3   |= (0x01<<0);            /* Secondary function VBUS */
  LPC_IOCON->PIO0_6   &= ~0x07;
  LPC_IOCON->PIO0_6   |= (0x01<<0);            /* Secondary function SoftConn */

  return TUSB_ERROR_NONE;
}

#endif