acassis commented on code in PR #16714: URL: https://github.com/apache/nuttx/pull/16714#discussion_r2202561127
########## boards/arm/stm32/common/src/stm32_sbutton.c: ########## @@ -0,0 +1,182 @@ +/**************************************************************************** + * boards/arm/stm32/common/src/stm32_sbutton.c + * + * SPDX-License-Identifier: Apache-2.0 + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. The + * ASF licenses this file to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance with the + * License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the + * License for the specific language governing permissions and limitations + * under the License. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#include <nuttx/arch.h> + +#include <stdio.h> +#include <errno.h> +#include <debug.h> + +#include <nuttx/board.h> +#include <arch/board/board.h> +#include <nuttx/input/sbutton.h> + +#include "stm32.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +struct stm32_sbtnconfig_s +{ + /* Configuration structure as seen by the HC-SR04 driver */ + + struct sbutton_config_s config; + + /* Additional private definitions only known to this driver */ + + void *arg; /* Argument to pass to the interrupt handler */ + xcpt_t isr; /* ISR Handler */ +}; + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +static int sbtn_irq_attach(const struct sbutton_config_s *state, xcpt_t isr, + void *arg); +static void sbtn_irq_enable(const struct sbutton_config_s *state, + bool enable); +static void sbtn_irq_clear(const struct sbutton_config_s *state); + +static bool sbtn_pin_status(void); + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/* A reference to a structure of this type must be passed to the SButton + * driver. This structure provides information about the configuration + * of the SButton and provides some board-specific hooks. + * + * Memory for this structure is provided by the caller. It is not copied + * by the driver and is presumed to persist while the driver is active. + */ + +static struct stm32_sbtnconfig_s g_sbtnconfig = +{ + .config = + { + .attach = sbtn_irq_attach, + .enable = sbtn_irq_enable, + .clear = sbtn_irq_clear, + .pin_status = sbtn_pin_status, + }, +}; + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/* Attach the SBUTTON interrupt handler to the GPIO interrupt */ + +static int sbtn_irq_attach(const struct sbutton_config_s *state, xcpt_t isr, + void *arg) +{ + struct stm32_sbtnconfig_s *priv = (struct stm32_sbtnconfig_s *)state; + irqstate_t flags; + + sinfo("sbtn_irq_attach\n"); + + flags = enter_critical_section(); + + priv->isr = isr; + priv->arg = arg; + + stm32_gpiosetevent(BOARD_SBUTTON_GPIO_INT, true, true, + true, isr, arg); + + leave_critical_section(flags); + + return OK; +} + +/* Enable or disable the GPIO interrupt */ + +static void sbtn_irq_enable(const struct sbutton_config_s *state, + bool enable) +{ + struct stm32_sbtnconfig_s *priv = (struct stm32_sbtnconfig_s *)state; + + iinfo("%d\n", enable); + + stm32_gpiosetevent(BOARD_SBUTTON_GPIO_INT, true, true, + true, enable ? priv->isr : NULL, priv->arg); +} + +/* Acknowledge/clear any pending GPIO interrupt */ + +static void sbtn_irq_clear(const struct sbutton_config_s *state) +{ + /* FIXME: Nothing to do ? */ +} + +/* Read and return the status of button (PRESSED = true; RELEASED = false */ + +static bool sbtn_pin_status(void) +{ + /* STM32F4Discovery button B1 is high level when press + * then just returned the status of the pin directly. + */ + + return stm32_gpioread(BOARD_SBUTTON_GPIO_INT); +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: stm32_sbutton_initialize + * + * Description: + * This function is called by application-specific, setup logic to + * configure the Single Button Dual Action. + * + * Input Parameters: + * devno - The device number, used to build the device path as /dev/distN Review Comment: Done -- This is an automated message from the Apache Git Service. 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