Add a file missed in the last commit
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Gregory Nutt
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8f0c912fff
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* drivers/sensors/zerocross.c and include/nuttx/sensors/zerocross.h:
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Add Zero Cross device driver support. From Alan Carvalho de Assis
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(2015-10-13).
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* configs/stm32f4discovery/src/stm32_zerocross.c: Add low level support
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for the Zero Cross driver for the STM32F4-Discovery. From Alan
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Carvalho de Assis (2015-10-13).
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2
configs
2
configs
@ -1 +1 @@
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Subproject commit b16519ea24e26d50c61202ea80802a0417daeb11
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Subproject commit 47c4c967a3dd1c9de5fa41ba587468f744f1ca36
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151
include/nuttx/sensors/zerocross.h
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151
include/nuttx/sensors/zerocross.h
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/****************************************************************************
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* include/nuttx/zerocross.h
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*
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* Copyright (C) 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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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#ifndef __NUTTX_SENSORS_ZEROCROSS_H
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#define __NUTTX_SENSORS_ZEROCROSS_H
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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 <nuttx/fs/ioctl.h>
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#ifdef CONFIG_ZEROCROSS
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************
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* CONFIG_ZEROCROSS - Enables support for the zero cross AC detection upper
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* half
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*/
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/* Command: ZCIOC_REGISTER
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* Description: Register to receive a signal whenever there is zero cross
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* interrupt event.
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* Argument: A read-only pointer to an instance of struct zc_notify_s
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* Return: Zero (OK) on success. Minus one will be returned on failure
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* with the errno value set appropriately.
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*/
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#define ZCIOC_REGISTER _ZCIOC(0x0001)
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/* This is the vtable that is used to by the upper half of the zero cross
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* to call back into the lower half of the zero cross driver.
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*/
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struct zc_lowerhalf_s;
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/* This is the type of the discrete zero cross interrupt handler used with
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* the struct zc_lowerhalf_s enable() method.
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*/
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typedef CODE void (*zc_interrupt_t)
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(FAR const struct zc_lowerhalf_s *lower, FAR void *arg);
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/* This is the interface between the lower half zero cross detection driver
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* and the upper half zero cross detection driver. A (device-specific)
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* instance of this structure is passed to the upper-half driver when the
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* zero cross driver is registered.
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*
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* Normally that lower half logic will have its own, custom state structure
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* that is simply cast to struct zc_lowerhalf_s. In order to perform such
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* casts, the initial fields of the custom state structure match the initial
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* fields of the following generic lower half state structure.
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*/
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/* A reference to this structure is provided with the ZCIOC_REGISTER IOCTL
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* command and describes the conditions under which the client would like
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* to receive notification.
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*/
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struct zc_notify_s
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{
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uint8_t zc_signo; /* Signal number to use in the notification */
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};
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struct zc_lowerhalf_s
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{
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/* Enable interrupt on the defined pin used to zero cross detection */
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CODE void (*zc_enable)(FAR const struct zc_lowerhalf_s *lower,
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zc_interrupt_t handler, FAR void *arg);
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};
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: zc_register
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*
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* Description:
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* Register the Zero Cross lower half device as 'devpath'
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*
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* Input Parameters:
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* devpath - The full path to the driver to register. E.g., "/dev/zc0"
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* lower - An instance of the lower half interface
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno value on failure.
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*
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****************************************************************************/
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int zc_register(FAR const char *devpath, FAR struct zc_lowerhalf_s *lower);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* CONFIG_ZEROCROSS */
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#endif /* __NUTTX_SENSORS_ZEROCROSS_H */
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