我有一个项目涉及 ESP32 从 DHT22 收集温度和湿度数据。我正在尝试使用从 github 下载的外部 DHT22 库的功能。当我尝试构建代码以在ESP32上对其进行测试时，我得到了未定义的函数引用，如图所示。我该如何解决这个问题？
主.c：
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_system.h"
#include "rom/ets_sys.h"
#include "nvs_flash.h"
#include "driver/gpio.h"
#include "sdkconfig.h"
#include "DHT22.h"
void DHT_task(void *pvParameter)
{
setDHTgpio( 4 );
printf( "Starting DHT Task\n\n");
while(1) {
printf("=== Reading DHT ===\n" );
int ret = readDHT();
errorHandler(ret);
printf( "Hum %.1f\n", getHumidity() );
printf( "Tmp %.1f\n", getTemperature() );
vTaskDelay( 3000 / portTICK_RATE_MS );
}
}
void app_main()
{
nvs_flash_init();
vTaskDelay( 1000 / portTICK_RATE_MS );
xTaskCreate( &DHT_task, "DHT_task", 2048, NULL, 5, NULL );
}
任务.json：
{
"version": "2.0.0",
"tasks": [
{
"label": "Build - Build project",
"type": "shell",
"command": "${config:idf.pythonBinPath} ${config:idf.espIdfPath}/tools/idf.py build",
"windows": {
"command": "${config:idf.pythonBinPathWin} ${config:idf.espIdfPathWin}\\tools\\idf.py build",
"options": {
"env": {
"PATH": "${env:PATH};${config:idf.customExtraPaths}"
}
}
},
"options": {
"env": {
"PATH": "${env:PATH}:${config:idf.customExtraPaths}"
}
},
"problemMatcher": [
{
"owner": "cpp",
"fileLocation": [
"relative",
"${workspaceFolder}"
],
"pattern": {
"regexp": "^\\.\\.(.*):(\\d+):(\\d+):\\s+(warning|error):\\s+(.*)$",
"file": 1,
"line": 2,
"column": 3,
"severity": 4,
"message": 5
}
},
{
"owner": "cpp",
"fileLocation": "absolute",
"pattern": {
"regexp": "^[^\\.](.*):(\\d+):(\\d+):\\s+(warning|error):\\s+(.*)$",
"file": 1,
"line": 2,
"column": 3,
"severity": 4,
"message": 5
}
}
],
"group": {
"kind": "build",
"isDefault": true
}
},
{
"label": "Set ESP-IDF Target",
"type": "shell",
"command": "${command:espIdf.setTarget}",
"problemMatcher": {
"owner": "cpp",
"fileLocation": "absolute",
"pattern": {
"regexp": "^(.*):(//d+):(//d+)://s+(warning|error)://s+(.*)$",
"file": 1,
"line": 2,
"column": 3,
"severity": 4,
"message": 5
}
}
},
{
"label": "Clean - Clean the project",
"type": "shell",
"command": "${config:idf.pythonBinPath} ${config:idf.espIdfPath}/tools/idf.py fullclean",
"windows": {
"command": "${config:idf.pythonBinPathWin} ${config:idf.espIdfPathWin}\\tools\\idf.py fullclean",
"options": {
"env": {
"PATH": "${env:PATH};${config:idf.customExtraPaths}"
}
}
},
"options": {
"env": {
"PATH": "${env:PATH}:${config:idf.customExtraPaths}"
}
},
"problemMatcher": [
{
"owner": "cpp",
"fileLocation": [
"relative",
"${workspaceFolder}"
],
"pattern": {
"regexp": "^\\.\\.(.*):(\\d+):(\\d+):\\s+(warning|error):\\s+(.*)$",
"file": 1,
"line": 2,
"column": 3,
"severity": 4,
"message": 5
}
},
{
"owner": "cpp",
"fileLocation": "absolute",
"pattern": {
"regexp": "^[^\\.](.*):(\\d+):(\\d+):\\s+(warning|error):\\s+(.*)$",
"file": 1,
"line": 2,
"column": 3,
"severity": 4,
"message": 5
}
}
]
},
{
"label": "Flash - Flash the device",
"type": "shell",
"command": "${config:idf.pythonBinPath} ${config:idf.espIdfPath}/tools/idf.py -p ${config:idf.port} -b ${config:idf.flashBaudRate} flash",
"windows": {
"command": "${config:idf.pythonBinPathWin} ${config:idf.espIdfPathWin}\\tools\\idf.py flash -p ${config:idf.portWin} -b ${config:idf.flashBaudRate}",
"options": {
"env": {
"PATH": "${env:PATH};${config:idf.customExtraPaths}"
}
}
},
"options": {
"env": {
"PATH": "${env:PATH}:${config:idf.customExtraPaths}"
}
},
"problemMatcher": [
{
"owner": "cpp",
"fileLocation": [
"relative",
"${workspaceFolder}"
],
"pattern": {
"regexp": "^\\.\\.(.*):(\\d+):(\\d+):\\s+(warning|error):\\s+(.*)$",
"file": 1,
"line": 2,
"column": 3,
"severity": 4,
"message": 5
}
},
{
"owner": "cpp",
"fileLocation": "absolute",
"pattern": {
"regexp": "^[^\\.](.*):(\\d+):(\\d+):\\s+(warning|error):\\s+(.*)$",
"file": 1,
"line": 2,
"column": 3,
"severity": 4,
"message": 5
}
}
]
},
{
"label": "Monitor: Start the monitor",
"type": "shell",
"command": "${config:idf.pythonBinPath} ${config:idf.espIdfPath}/tools/idf.py -p ${config:idf.port} monitor",
"windows": {
"command": "${config:idf.pythonBinPathWin} ${config:idf.espIdfPathWin}\\tools\\idf.py -p ${config:idf.portWin} monitor",
"options": {
"env": {
"PATH": "${env:PATH};${config:idf.customExtraPaths}"
}
}
},
"options": {
"env": {
"PATH": "${env:PATH}:${config:idf.customExtraPaths}"
}
},
"problemMatcher": [
{
"owner": "cpp",
"fileLocation": [
"relative",
"${workspaceFolder}"
],
"pattern": {
"regexp": "^\\.\\.(.*):(\\d+):(\\d+):\\s+(warning|error):\\s+(.*)$",
"file": 1,
"line": 2,
"column": 3,
"severity": 4,
"message": 5
}
},
{
"owner": "cpp",
"fileLocation": "absolute",
"pattern": {
"regexp": "^[^\\.](.*):(\\d+):(\\d+):\\s+(warning|error):\\s+(.*)$",
"file": 1,
"line": 2,
"column": 3,
"severity": 4,
"message": 5
}
}
],
"dependsOn": "Flash - Flash the device"
},
{
"label": "OpenOCD: Start openOCD",
"type": "shell",
"presentation": {
"echo": true,
"reveal": "never",
"focus": false,
"panel": "new"
},
"command": "openocd -s ${command:espIdf.getOpenOcdScriptValue} ${command:espIdf.getOpenOcdConfigs}",
"windows": {
"command": "openocd.exe -s ${command:espIdf.getOpenOcdScriptValue} ${command:espIdf.getOpenOcdConfigs}",
"options": {
"env": {
"PATH": "${env:PATH};${config:idf.customExtraPaths}"
}
}
},
"options": {
"env": {
"PATH": "${env:PATH}:${config:idf.customExtraPaths}"
}
},
"problemMatcher": {
"owner": "cpp",
"fileLocation": "absolute",
"pattern": {
"regexp": "^(.*):(\\d+):(\\d+):\\s+(warning|error):\\s+(.*)$",
"file": 1,
"line": 2,
"column": 3,
"severity": 4,
"message": 5
}
}
},
{
"label": "adapter",
"type": "shell",
"command": "${config:idf.pythonBinPath}",
"isBackground": true,
"options": {
"env": {
"PATH": "${env:PATH}:${config:idf.customExtraPaths}",
"PYTHONPATH": "${command:espIdf.getExtensionPath}/esp_debug_adapter/debug_adapter"
}
},
"problemMatcher": {
"background": {
"beginsPattern": "\bDEBUG_ADAPTER_STARTED\b",
"endsPattern": "DEBUG_ADAPTER_READY2CONNECT",
"activeOnStart": true
},
"pattern": {
"regexp": "(\\d+)-(\\d+)-(\\d+)\\s(\\d+):(\\d+):(\\d+),(\\d+)\\s-(.+)\\s(ERROR)",
"file": 8,
"line": 2,
"column": 3,
"severity": 4,
"message": 9
}
},
"args": [
"${command:espIdf.getExtensionPath}/esp_debug_adapter/debug_adapter_main.py",
"-e",
"${workspaceFolder}/build/${command:espIdf.getProjectName}.elf",
"-s",
"${command:espIdf.getOpenOcdScriptValue}",
"-ip",
"localhost",
"-dn",
"${config:idf.adapterTargetName}",
"-om",
"connect_to_instance",
"-I", "C:\\Users\\vorte\\ESP-IDF\\Projects\\hello_world\\main",
],
"windows": {
"command": "${config:idf.pythonBinPathWin}",
"options": {
"env": {
"PATH": "${env:PATH};${config:idf.customExtraPaths}",
"PYTHONPATH": "${command:espIdf.getExtensionPath}/esp_debug_adapter/debug_adapter"
}
}
}
}
]
}
c_cpp_properties.json：
{
"configurations": [
{
"name": "ESP-IDF",
"compilerPath": "${default}",
"cStandard": "c11",
"cppStandard": "c++17",
"includePath": [
"${config:idf.espIdfPath}/components/**",
"${config:idf.espIdfPathWin}/components/**",
"${workspaceFolder}/**",
"C:\\Users\\vorte\\ESP-IDF\\Projects\\hello_world\\main"
],
"browse": {
"path": [
"${config:idf.espIdfPath}/components",
"${config:idf.espIdfPathWin}/components",
"${workspaceFolder}",
"C:\\Users\\vorte\\ESP-IDF\\Projects\\hello_world\\main"
],
"limitSymbolsToIncludedHeaders": false
}
}
],
"version": 4
}