100 lines
3.4 KiB
C
100 lines
3.4 KiB
C
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/****************************************************************************
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* configs/stm32f4discovery/src/stm32_nunchuck.c
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*
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* Copyright (C) 2017 Gregory Nutt. All rights reserved.
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* Author: Alan Carvalho de Assis <acassis@gmail.com>
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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 <fcntl.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/irq.h>
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#include <nuttx/arch.h>
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#include <nuttx/fs/fs.h>
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#include <nuttx/input/nunchuck.h>
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#include "stm32_i2c.h"
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#include "stm32f4discovery.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define NUNCHUCK_I2C_PORTNO 1 /* On I2C1 */
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nunchuck_initialize
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*
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* Description:
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* Initialize and register the Nunchuck joystick driver
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*
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****************************************************************************/
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int nunchuck_initialize(FAR char *devname)
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{
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FAR struct i2c_master_s *i2c;
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int ret;
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iinfo("Initializing Wii Nunchuck!\n");
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/* Initialize I2C */
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i2c = stm32_i2cbus_initialize(NUNCHUCK_I2C_PORTNO);
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if (i2c == NULL)
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{
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return -ENODEV;
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}
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/* Register the joystick device as /dev/nunchuck0 */
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iinfo("Initialize joystick driver: %s\n", devname);
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ret = nunchuck_register(devname, i2c);
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if (ret < 0)
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{
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ierr("ERROR: nunchuck_register failed: %d\n", ret);
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}
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return ret;
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}
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