hardware.h

来自「CANopen 协议栈源码 ,实现基本的CANopen 协议」· C头文件 代码 · 共 53 行

/*
This file is part of CanFestival, a library implementing CanOpen Stack.

Copyright (C): Edouard TISSERANT and Francis DUPIN
AVR Port: Andreas GLAUSER and Peter CHRISTEN

See COPYING file for copyrights details.

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
/******************************************************************************
MCU ports and Bits
Makros for access on hardware
******************************************************************************/

#ifndef _HARDWARE_INCLUDED
#define _HARDWARE_INCLUDED

/******************************************************************************
Makros for bit access on the ports and registers
******************************************************************************/
// Macros for set and clear bits in I/O registers
#define setbit(address,bit) ((address) |= (1<<(bit)))
#define clearbit(address,bit) ((address) &= ~(1<<(bit)))
#define togglebit(address,bit) ((address) ^= (1<<(bit)))

// Macro for testing of a single bit in an I/O location
#define checkbit(address,bit) ((address) & (1<<(bit)))

/************************** Hardware Makros **********************************/

// Read the inputs
#define get_inputs()		(~PINA)
#define read_bcd()		(~PINC & 0x0F)
// Write the outputs
#define set_outputs(val)	PORTB = ~(val)

#endif	// _HARDWARE_INCLUDED