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Shriyans406Shriyans406
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boards/xtensa/esp32: Add LED support for
Heltec WiFi LoRa 32 board This commit adds the User LED driver support for the Heltec WiFi LoRa 32 board. It implements the lower-half driver, maps the onboard white LED to GPIO 25, and adds the necessary build system and initialization logic. Signed-off-by: Shriyans Sahoo <shriyans.s.sahoo@gmail.com>
1 parent 8e91dd6 commit 83a8199

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Lines changed: 107 additions & 7 deletions

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‎boards/xtensa/esp32/heltec_wifi_lora32/include/board.h‎

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/* Define how many LEDs this board has (needed by userleds) */
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#define BOARD_NLEDS 1
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#define GPIO_LED1 25 /* White LED on Heltec WiFi LoRa 32 */
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/* GPIO pins used by the GPIO Subsystem */
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‎boards/xtensa/esp32/heltec_wifi_lora32/src/Make.defs‎

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@@ -34,3 +34,6 @@ DEPPATH += --dep-path board
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VPATH += :board
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CFLAGS += ${INCDIR_PREFIX}$(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src$(DELIM)board$(DELIM)board
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ifeq ($(CONFIG_USERLED),y)
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CSRCS += esp32_userleds.c
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endif

‎boards/xtensa/esp32/heltec_wifi_lora32/src/esp32_bringup.c‎

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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <nuttx/debug.h>
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#include <errno.h>
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#include <nuttx/debug.h>
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#include <nuttx/board.h>
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#ifdef CONFIG_USERLED
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# include <nuttx/leds/userled.h>
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#endif
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#include "esp32_start.h"
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#ifdef CONFIG_ESPRESSIF_HR_TIMER
@@ -110,6 +114,14 @@ int esp32_bringup(void)
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* capabilities.
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*/
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#ifdef CONFIG_USERLED
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ret = userled_lower_initialize("/dev/userleds");
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if (ret < 0)
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{
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syslog(LOG_ERR, "ERROR: userled_lower_initialize() failed: %d\n", ret);
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}
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#endif
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UNUSED(ret);
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return OK;
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}

‎boards/xtensa/esp32/heltec_wifi_lora32/src/esp32_userleds.c‎

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/****************************************************************************
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* boards/xtensa/esp32/heltec_wifi_lora32/src/esp32_userleds.c
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*
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* SPDX-License-Identifier: Apache-2.0
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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 <stdbool.h>
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#include <nuttx/board.h>
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#include <arch/board/board.h>
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#include "espressif/esp_gpio.h"
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#include "heltec_wifi_lora32.h"
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static const uint32_t g_ledcfg[BOARD_NLEDS] =
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{
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GPIO_LED1,
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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: board_userled_initialize
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****************************************************************************/
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uint32_t board_userled_initialize(void)
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{
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int i;
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for (i = 0; i < BOARD_NLEDS; i++)
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{
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esp_configgpio(g_ledcfg[i], OUTPUT);
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}
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return BOARD_NLEDS;
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}
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/****************************************************************************
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* Name: board_userled
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****************************************************************************/
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void board_userled(int led, bool ledon)
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{
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if ((unsigned int)led < BOARD_NLEDS)
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{
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esp_gpiowrite(g_ledcfg[led], ledon);
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}
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}
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/****************************************************************************
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* Name: board_userled_all
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****************************************************************************/
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void board_userled_all(uint32_t ledset)
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{
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int i;
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for (i = 0; i < BOARD_NLEDS; i++)
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{
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esp_gpiowrite(g_ledcfg[i], (ledset & (1 << i)) != 0);
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}
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}

‎boards/xtensa/esp32/heltec_wifi_lora32/src/heltec_wifi_lora32.h‎

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#define BUTTON_BOOT 0
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/* LED
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*
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* This is an externally connected LED used for testing.
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*/
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#define GPIO_LED1 2
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/* PCNT Quadrature Encoder IDs */
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