text: /************************************************************************************
   * arch/arm/src/stm32/chip/stm32l4_rng.h
   *
   *   Copyright (C) 2012 Max Holtzberg. All rights reserved.
   *   Author: Max Holtzberg <mh@uvc.de>
   *
   * 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, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   * 3. Neither the name NuttX nor the names of its contributors may be
   *    used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "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
   * COPYRIGHT OWNER OR CONTRIBUTORS 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 INTERRUPTION) HOWEVER CAUSED
   * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   ************************************************************************************/
  
  #ifndef __ARCH_ARM_STC_STM32L4_CHIP_STM32L4_RNG_H
  #define __ARCH_ARM_STC_STM32L4_CHIP_STM32L4_RNG_H
  
  /************************************************************************************
   * Included Files
   ************************************************************************************/
  
  #include <nuttx/config.h>
  #include "chip.h"
  
  /************************************************************************************
   * Pre-processor Definitions
   ************************************************************************************/
  
  /* Register Offsets *****************************************************************/
  
  #define STM32L4_RNG_CR_OFFSET     0x0000  /* RNG Control Register */
  #define STM32L4_RNG_SR_OFFSET     0x0004  /* RNG Status Register */
  #define STM32L4_RNG_DR_OFFSET     0x0008  /* RNG Data Register */
  
  /* Register Addresses ***************************************************************/
  
  #define STM32L4_RNG_CR            (STM32L4_RNG_BASE+STM32L4_RNG_CR_OFFSET)
  #define STM32L4_RNG_SR            (STM32L4_RNG_BASE+STM32L4_RNG_SR_OFFSET)
  #define STM32L4_RNG_DR            (STM32L4_RNG_BASE+STM32L4_RNG_DR_OFFSET)
  
  /* Register Bitfield Definitions ****************************************************/
  
  /* RNG Control Register */
  
  #define RNG_CR_RNGEN              (1 << 2)  /* Bit 2: RNG enable */
  #define RNG_CR_IE                 (1 << 3)  /* Bit 3: Interrupt enable */
  
  /* RNG Status Register */
  
  #define RNG_SR_DRDY               (1 << 0) /* Bit 0: Data ready */
  #define RNG_SR_CECS               (1 << 1) /* Bit 1: Clock error current status */
  #define RNG_SR_SECS               (1 << 2) /* Bit 2: Seed error current status */
  #define RNG_SR_CEIS               (1 << 5) /* Bit 5: Clock error interrupt status */
  #define RNG_SR_SEIS               (1 << 6) /* Bit 6: Seed error interrupt status */
  
  #endif /* __ARCH_ARM_STC_STM32L4_CHIP_STM32L4_RNG_H */
  