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configs/nucleo-l432kc/src/stm32_zerocross.c: Necessary file ommitted from a previous patch
This commit is contained in:
Daniel Pereira Carvalho
committed by
Gregory Nutt
Gregory Nutt
parent
38b9862902
commit
0a4c592a4b
@@ -0,0 +1,194 @@
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/****************************************************************************
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* configs/nucleo-l432kc/src/stm32_zerocross.c
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*
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* Copyright (C) 2018-2019 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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/****************************************************************************
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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 <debug.h>
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#include <nuttx/irq.h>
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#include <nuttx/arch.h>
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#include <nuttx/sensors/zerocross.h>
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#include "stm32l4_gpio.h"
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#include "nucleo-l432kc.h"
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#ifdef CONFIG_SENSORS_ZEROCROSS
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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static void zcross_enable(FAR const struct zc_lowerhalf_s *lower,
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zc_interrupt_t handler, FAR void *arg);
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static void zcross_disable(void);
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static int zcross_interrupt(int irq, FAR void *context, FAR void *arg);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* Current interrupt handler and argument */
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static zc_interrupt_t g_zcrosshandler;
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static FAR void *g_zcrossarg;
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/* This is the zero cross lower half driver interface */
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static struct zc_lowerhalf_s g_zcrosslower =
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{
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.zc_enable = zcross_enable,
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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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* Name: zcross_enable
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*
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* Description:
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* Enable interrupts on the selected zero cross pin. And empty
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* set will disable all interrupts.
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*
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****************************************************************************/
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static void zcross_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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irqstate_t flags;
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bool rising = false;
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bool falling = true;
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/* Start with all interrupts disabled */
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flags = enter_critical_section();
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zcross_disable();
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sninfo("handler: %p arg: %p\n", handler, arg);
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if (handler)
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{
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g_zcrosshandler = handler;
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g_zcrossarg = arg;
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}
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(void)stm32l4_gpiosetevent(GPIO_ZEROCROSS, rising, falling,
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true, zcross_interrupt, NULL);
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leave_critical_section(flags);
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}
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/****************************************************************************
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* Name: zcross_disable
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*
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* Description:
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* Disable zero cross interrupts
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*
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****************************************************************************/
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static void zcross_disable(void)
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{
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irqstate_t flags;
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/* Disable zero cross pin interrupt */
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flags = enter_critical_section();
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(void)stm32l4_gpiosetevent(GPIO_ZEROCROSS, false, false, false, NULL, NULL);
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leave_critical_section(flags);
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/* Nullify the handler and argument */
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g_zcrosshandler = NULL;
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g_zcrossarg = NULL;
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}
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/****************************************************************************
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* Name: zcross_interrupt
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*
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* Description:
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* Zero Cross interrupt handler
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*
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****************************************************************************/
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static int zcross_interrupt(int irq, FAR void *context, FAR void *arg)
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{
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DEBUGASSERT(g_zcrosshandler != NULL);
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if (g_zcrosshandler)
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{
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g_zcrosshandler(&g_zcrosslower, g_zcrossarg);
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}
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return OK;
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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: stm32_zerocross_initialize
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*
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* Description:
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* Initialize and register the zero cross driver
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*
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****************************************************************************/
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int stm32_zerocross_initialize(void)
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{
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/* Configure the GPIO pin as input. NOTE: This is unnecessary for
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* interrupting pins since it will also be done by stm32l4_gpiosetevent().
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*/
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stm32l4_configgpio(GPIO_ZEROCROSS);
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/* Make sure that all interrupts are disabled */
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zcross_disable();
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/* Register the zero cross device as /dev/zc0 */
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return zc_register("/dev/zc0", &g_zcrosslower);
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}
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#endif /* CONFIG_SENSORS_ZEROCROSS */
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