boards/esp32-devkitc: Add Button support via the BOOT button
This commit is contained in:
Gustavo Henrique Nihei
Alan Carvalho de Assis
parent
d8073c2fd8
commit
fca65f08cf
@ -199,6 +199,8 @@ config ARCH_BOARD_ESP32_DEVKITC
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bool "Espressif ESP32 DevkitC board V4"
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depends on ARCH_CHIP_ESP32WROOM32 || ARCH_CHIP_ESP32WROOM32_8MB || ARCH_CHIP_ESP32WROOM32_16MB || ARCH_CHIP_ESP32WROVER || ARCH_CHIP_ESP32SOLO1
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select ARCH_HAVE_LEDS
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select ARCH_HAVE_BUTTONS
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select ARCH_HAVE_IRQBUTTONS if ESP32_GPIO_IRQ
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---help---
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The ESP32 is a dual-core system from Espressif with two Harvard
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architecture Xtensa LX6 CPUs. All embedded memory, external memory
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@ -46,7 +46,11 @@ CSRCS += esp32_spiflash.c
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endif
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ifeq ($(CONFIG_USERLED),y)
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CSRCS += esp32_userleds.c
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CSRCS += esp32_userleds.c
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endif
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ifeq ($(CONFIG_ARCH_BUTTONS),y)
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CSRCS += esp32_buttons.c
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endif
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SCRIPTIN = $(SCRIPTDIR)$(DELIM)esp32.template.ld
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@ -33,7 +33,11 @@
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* Pre-processor Definitions
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****************************************************************************/
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/* GPIO Pin Definitions *****************************************************/
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/* ESP32-DevKitC GPIOs ******************************************************/
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/* BOOT Button */
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#define BUTTON_BOOT 0
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/* LED
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*
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@ -63,6 +63,10 @@
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# include "esp32_aes.h"
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#endif
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#ifdef CONFIG_BUTTONS
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# include <nuttx/input/buttons.h>
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#endif
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#include "esp32-devkitc.h"
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/****************************************************************************
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@ -280,6 +284,16 @@ int esp32_bringup(void)
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}
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#endif
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#ifdef CONFIG_BUTTONS
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/* Register the BUTTON driver */
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ret = btn_lower_initialize("/dev/buttons");
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if (ret < 0)
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{
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syslog(LOG_ERR, "ERROR: btn_lower_initialize() failed: %d\n", ret);
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}
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#endif
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/* If we got here then perhaps not all initialization was successful, but
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* at least enough succeeded to bring-up NSH with perhaps reduced
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* capabilities.
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166
boards/xtensa/esp32/esp32-devkitc/src/esp32_buttons.c
Normal file
166
boards/xtensa/esp32/esp32-devkitc/src/esp32_buttons.c
Normal file
@ -0,0 +1,166 @@
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/****************************************************************************
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* boards/xtensa/esp32/esp32-devkitc/src/esp32_buttons.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <errno.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <syslog.h>
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#include <nuttx/arch.h>
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#include <nuttx/board.h>
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#include <nuttx/irq.h>
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#include <arch/irq.h>
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#include "esp32_cpuint.h"
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#include "esp32_gpio.h"
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#include "esp32-devkitc.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: board_button_initialize
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*
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* Description:
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* board_button_initialize() must be called to initialize button resources.
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* After that, board_buttons() may be called to collect the current state
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* of all buttons or board_button_irq() may be called to register button
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* interrupt handlers.
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*
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****************************************************************************/
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uint32_t board_button_initialize(void)
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{
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esp32_configgpio(BUTTON_BOOT, INPUT_FUNCTION_3 | PULLDOWN);
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return 1;
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}
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/****************************************************************************
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* Name: board_buttons
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*
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* Description:
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* After board_button_initialize() has been called, board_buttons() may be
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* called to collect the state of all buttons. board_buttons() returns an
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* 8-bit bit set with each bit associated with a button. See the
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* BUTTON_*_BIT definitions in board.h for the meaning of each bit.
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*
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****************************************************************************/
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uint32_t board_buttons(void)
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{
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uint8_t ret = 0;
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int i = 0;
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int n = 0;
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bool b0 = esp32_gpioread(BUTTON_BOOT);
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for (i = 0; i < 10; i++)
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{
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up_mdelay(1); /* TODO */
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bool b1 = esp32_gpioread(BUTTON_BOOT);
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if (b0 == b1)
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{
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n++;
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}
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else
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{
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n = 0;
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}
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if (3 == n)
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{
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break;
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}
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b0 = b1;
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}
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iinfo("b=%d n=%d \n", b0, n);
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/* Low value means that the button is pressed */
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if (!b0)
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{
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ret = 0x1;
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}
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return ret;
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}
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/****************************************************************************
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* Name: board_button_irq
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*
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* Description:
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* board_button_irq() may be called to register an interrupt handler that
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* will be called when a button is depressed or released. The ID value is
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* a button enumeration value that uniquely identifies a button resource.
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* See the BUTTON_* definitions in board.h for the meaning of enumeration
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* value.
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*
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****************************************************************************/
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#ifdef CONFIG_ARCH_IRQBUTTONS
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int board_button_irq(int id, xcpt_t irqhandler, FAR void *arg)
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{
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int ret;
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DEBUGASSERT(id == BUTTON_BOOT);
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int irq = ESP32_PIN2IRQ(BUTTON_BOOT);
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if (NULL != irqhandler)
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{
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/* Make sure the interrupt is disabled */
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esp32_gpioirqdisable(irq);
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ret = irq_attach(irq, irqhandler, arg);
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if (ret < 0)
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{
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syslog(LOG_ERR, "ERROR: irq_attach() failed: %d\n", ret);
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return ret;
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}
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gpioinfo("Attach %p\n", irqhandler);
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gpioinfo("Enabling the interrupt\n");
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/* Configure the interrupt for rising and falling edges */
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esp32_gpioirqenable(irq, CHANGE);
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}
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else
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{
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gpioinfo("Disable the interrupt\n");
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esp32_gpioirqdisable(irq);
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}
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return OK;
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}
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#endif
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