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RIOT/cpu/atmega_common/include/cpu.h 1.81 KB
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  /*
   * Copyright (C) 2015 Kaspar Schleiser <kaspar@schleiser.de>
   *               2014 Freie Universitรคt Berlin, Hinnerk van Bruinehsen
   *
   * This file is subject to the terms and conditions of the GNU Lesser
   * General Public License v2.1. See the file LICENSE in the top level
   * directory for more details.
   */
  
  /**
   * @ingroup     cpu_atmega_common
   * @brief       Common implementations and headers for ATmega family based micro-controllers
   * @{
   *
   * @file
   * @brief       Basic definitions for the ATmega common module
   *
   * When ever you want to do something hardware related, that is accessing MCUs registers directly,
   * just include this file. It will then make sure that the MCU specific headers are included.
   *
   * @author      Stefan Pfeiffer <stefan.pfeiffer@fu-berlin.de>
   * @author      Hauke Petersen <hauke.petersen@fu-berlin.de>
   * @author      Hinnerk van Bruinehsen <h.v.bruinehsen@fu-berlin.de>
   * @author      Kaspar Schleiser <kaspar@schleiser.de>
   */
  
  #ifndef ATMEGA_COMMON_H
  #define ATMEGA_COMMON_H
  
  #include <stdio.h>
  #include <stdint.h>
  
  #include <avr/interrupt.h>
  #include "cpu_conf.h"
  
  /**
   * For downwards compatibility with old RIOT code.
   * TODO: remove once core was adjusted
   */
  #include "irq.h"
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /**
   * @brief global in-ISR state variable
   */
  extern volatile uint8_t __in_isr;
  
  /**
   * @brief Flag entering of an ISR
   */
  static inline void __enter_isr(void)
  {
      __in_isr = 1;
  }
  
  /**
   * @brief Flag exiting of an ISR
   */
  static inline void __exit_isr(void)
  {
      __in_isr = 0;
  }
  
  /**
   * @brief Initialization of the CPU
   */
  void cpu_init(void);
  
  /**
   * @brief   Print the last instruction's address
   *
   * @todo:   Not supported
   */
  static inline void cpu_print_last_instruction(void)
  {
      puts("n/a");
  }
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* ATMEGA_COMMON_H */
  /** @} */