01f6a8a146
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2352 42af7a65-404d-4744-a932-0658087f49c3
112 lines
3.9 KiB
C
112 lines
3.9 KiB
C
/****************************************************************************
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* configs/skp16c26/src/up_buttons.c
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*
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* Copyright (C) 2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include "chip.h"
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#include "up_arch.h"
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#include "up_internal.h"
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/* The SKP62C26 has 3 buttons control by bits 1, 2, and 3 in port 8. */
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#define SW1_BIT (1 << 3) /* Bit 3, port 8 */
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#define SW2_BIT (1 << 2) /* Bit 2, port 8 */
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#define SW3_BIT (1 << 1) /* Bit 1, port 8 */
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#define SW_PRESSED(p,b) (((p) & (b)) == 0)
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_buttoninit
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****************************************************************************/
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#ifdef CONFIG_ARCH_BUTTONS
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void up_buttoninit(void)
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{
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uint8_t regval;
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regval = getreg8(M16C_PD8);
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regval |= (SW1_BIT | SW2_BIT | SW3_BIT);
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putreg8(regval, M16C_PD8);
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}
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/****************************************************************************
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* Name: up_buttons
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****************************************************************************/
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uint8_t up_buttons(void)
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{
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uint8_t swset = 0;
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uint8_t regval = getreg8(M16C_P8);
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if (SW_PRESSED(regval, SW1_BIT))
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{
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swset |= SW1_PRESSED;
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}
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if (SW_PRESSED(regval, SW2_BIT))
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{
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swset |= SW2_PRESSED;
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}
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if (SW_PRESSED(regval, SW3_BIT))
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{
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swset |= SW3_PRESSED;
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}
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return swset;
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}
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#endif /* CONFIG_ARCH_BUTTONS */
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