145 lines
5.0 KiB
C
145 lines
5.0 KiB
C
/*
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* Copyright (c) 2008-2012, Freescale Semiconductor, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* o Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* o Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* o Neither the name of Freescale Semiconductor, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*!
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* @file io.h
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* @brief Register access macros.
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*
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* @ingroup diag_init
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*/
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#ifndef __IO_H__
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#define __IO_H__
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#include "sdk_types.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "sdk.h"
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////////////////////////////////////////////////////////////////////////////////
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// Definitions
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////////////////////////////////////////////////////////////////////////////////
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//! @name Register read functions
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//@{
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#define reg8_read(addr) *((volatile uint8_t *)(addr))
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#define reg16_read(addr) *((volatile uint16_t *)(addr))
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#define reg32_read(addr) *((volatile uint32_t *)(addr))
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//@}
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//! @name Register write functions
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//@{
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#define reg8_write(addr,val) *((volatile uint8_t *)(addr)) = (val)
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#define reg16_write(addr,val) *((volatile uint16_t *)(addr)) = (val)
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#define reg32_write(addr,val) *((volatile uint32_t *)(addr)) = (val)
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//@}
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//! @name Memory read functions
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//@{
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#define mem8_read(addr) *((volatile uint8_t *)(addr))
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#define mem16_read(addr) *((volatile uint16_t *)(addr))
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#define mem32_read(addr) *((volatile uint32_t *)(addr))
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//@}
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//! @name Memory write functions
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//@{
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#define mem8_write(addr,val) *((volatile uint8_t *)(addr)) = (val)
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#define mem16_write(addr,val) *((volatile uint16_t *)(addr)) = (val)
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#define mem32_write(addr,val) *((volatile uint32_t *)(addr)) = (val)
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//@}
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//! @name Read functions
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//@{
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#define readb(a) reg8_read(a)
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#define readw(a) reg16_read(a)
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#define readl(a) reg32_read(a)
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//@}
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//! @name Write functrions
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//!
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//! The prefered method to access registers.
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//@{
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#define writeb(v, a) reg8_write(a, v)
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#define writew(v, a) reg16_write(a, v)
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#define writel(v, a) reg32_write(a, v)
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//@}
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//! @name Bit set/clear functions
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//@{
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#define reg8setbit(addr,bitpos) \
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reg8_write((addr),(reg8_read((addr)) | (1<<(bitpos))))
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#define reg16setbit(addr,bitpos) \
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reg16_write((addr),(reg16_read((addr)) | (1<<(bitpos))))
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#define reg32setbit(addr,bitpos) \
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reg32_write((addr),(reg32_read((addr)) | (1<<(bitpos))))
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#define reg8clrbit(addr,bitpos) \
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reg8_write((addr),(reg8_read((addr)) & (0xFF ^ (1<<(bitpos)))))
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#define reg16clrbit(addr,bitpos) \
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reg16_write((addr),(reg16_read((addr)) & (0xFFFF ^ (1<<(bitpos)))))
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#define reg32clrbit(addr,bitpos) \
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reg32_write((addr),(reg32_read((addr)) & (0xFFFFFFFF ^ (1<<(bitpos)))))
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//@}
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//! @name Masked write functions
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//@{
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#define reg8_write_mask(addr, data, mask) \
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reg8_write((addr),((reg8_read(addr) & (~mask)) | (mask & data)))
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#define reg16_write_mask(addr, data, mask) \
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reg16_write((addr),((reg16_read(addr) & (~mask)) | (mask & data)))
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#define reg32_write_mask(addr, data, mask) \
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reg32_write((addr),((reg32_read(addr) & (~mask)) | (mask & data)))
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#define gen_msk32(start, end) ((0xFFFFFFFF << (start)) ^ (0xFFFFFFFF << ((end + 1))))
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#define reg32_set_field(addr, start, end, val) \
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reg32_write_mask(addr, (val) << (start), gen_msk32((start, end)))
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//@}
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/*!
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* This macro is used to get certain bit field from a number
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*/
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#define GET_FIELD(val, len, sh) ((val >> sh) & ((1 << len) - 1))
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/*!
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* This macro is used to set certain bit field inside a number
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*/
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#define SET_FIELD(val, len, sh, nval) ((val & ~(((1 << len) - 1) << sh)) | (nval << sh))
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#endif // __IO_H__
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////////////////////////////////////////////////////////////////////////////////
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// EOF
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////////////////////////////////////////////////////////////////////////////////
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