FireBeetle 2 ESP32 C6+小白手把手教你制作屏幕+温湿度扩展板 2
本帖最后由 lihuahua 于 2024-4-2 21:22 编辑小白手把手教你制作 “FireBeetle 2 ESP32 C6开发板”的屏幕+温湿度扩展板-2上一篇文章，小白教大家制作了ESP32 C6的扩展板，含有dht11传感器模块和0.96tft彩屏。链接
本篇文章教大家在已有硬件上，实现电池电压采集、dht11传感器数据读取，tft彩屏上显示数据功能。
1、代码总体思想：代码使用freertos，创建两个线程：
[*]温湿度传感器数据读取
创建一个线程用于dht11温湿度读取，该线程通过定时器唤醒；
#include <Arduino.h>
#include <Ticker.h>
#include "DHTesp.h" // Click here to get the library: http://librarymanager/All#DHTesp
/** Initialize DHT sensor 1 */
DHTesp dhtSensor1;
/** Task handle for the light value read task */
TaskHandle_t tempTaskHandle = NULL;
/** Pin number for DHT11 1 data pin */
int dhtPin1 = 17;
/** Ticker for temperature reading */
Ticker tempTicker;
/** Flags for temperature readings finished */
bool gotNewTemperature = false;
/** Data from sensor 1 */
TempAndHumidity sensor1Data;
/* Flag if main loop is running */
bool tasksEnabled = false;
/**
* Task to reads temperature from DHT11 sensor
* @param pvParameters
* pointer to task parameters
*/
void tempTask(void *pvParameters) {
Serial.println("tempTask loop started");
while (1) // tempTask loop
{
if (tasksEnabled && !gotNewTemperature) { // Read temperature only if old data was processed already
// Reading temperature for humidity takes about 250 milliseconds!
// Sensor readings may also be up to 2 seconds 'old' (it's a very slow sensor)
sensor1Data = dhtSensor1.getTempAndHumidity(); // Read values from sensor 1
gotNewTemperature = true;
}
vTaskSuspend(NULL);
}
}
/**
* triggerGetTemp
* Sets flag dhtUpdated to true for handling in loop()
* called by Ticker tempTicker
*/
void triggerGetTemp() {
if (tempTaskHandle != NULL) {
xTaskResumeFromISR(tempTaskHandle);
}
}
[*]电池电压采集、显示器显示
创建线程进行电池电压采集、驱动显示器显示温湿度数据和电压值。线程1的优先级高于线程2的优先级。
#include <Adafruit_GFX.h> // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library for ST7735
#include <Adafruit_ST7789.h> // Hardware-specific library for ST7789
#include <SPI.h>
#define TFT_CS 1
#define TFT_RST 14 // Or set to -1 and connect to Arduino RESET pin
#define TFT_DC 8
#define TFT_MOSI 22// Data out
#define TFT_SCLK 23// Clock out
Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_MOSI, TFT_SCLK, TFT_RST);
int tft_blk = 15;
TaskHandle_t tftTaskHandle = NULL;
void tftTask(void *pvParameters) {
while (1) // tempTask loop
{
vTaskDelay(2000);
// Serial.println("Sensor 1 data:");
// Serial.println("Temp: " + String(sensor1Data.temperature,2) + "'C Humidity: " + String(sensor1Data.humidity,1) + "%");
//数据更新
// tft.fillRect(5+11*6,15,12*5,15,ST77XX_BLACK);
// tft.fillRect(5+11*10, 40,12*2,15,ST77XX_BLACK);
tft.setTextSize(2);tft.setTextColor(ST77XX_WHITE, ST77XX_BLACK);
tft.setCursor(5+11*6, 15);tft.print(String(sensor1Data.temperature,2));
tft.setCursor(5+11*10, 40); tft.print(String(sensor1Data.humidity,0)+"%");
//电池电压显示：
//int analogValue = analogRead(0);
int analogVolts = analogReadMilliVolts(0);
tft.setTextSize(1);
tft.setCursor(3, 3);
tft.print(String(analogVolts*0.002,2)+"V");
gotNewTemperature = false;
}
}
[*]总体代码
#include <Arduino.h>
#include <Ticker.h>
#include "DHTesp.h" // Click here to get the library: http://librarymanager/All#DHTesp
#include <Adafruit_GFX.h> // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library for ST7735
#include <Adafruit_ST7789.h> // Hardware-specific library for ST7789
#include <SPI.h>
#define TFT_CS 1
#define TFT_RST 14 // Or set to -1 and connect to Arduino RESET pin
#define TFT_DC 8
#define TFT_MOSI 22// Data out
#define TFT_SCLK 23// Clock out
Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_MOSI, TFT_SCLK, TFT_RST);
int tft_blk = 15;
/** Initialize DHT sensor 1 */
DHTesp dhtSensor1;
/** Task handle for the light value read task */
TaskHandle_t tempTaskHandle = NULL;
TaskHandle_t tftTaskHandle = NULL;
/** Pin number for DHT11 1 data pin */
int dhtPin1 = 17;
/** Ticker for temperature reading */
Ticker tempTicker;
/** Flags for temperature readings finished */
bool gotNewTemperature = false;
/** Data from sensor 1 */
TempAndHumidity sensor1Data;
/* Flag if main loop is running */
bool tasksEnabled = false;
/**
* Task to reads temperature from DHT11 sensor
* @param pvParameters
* pointer to task parameters
*/
void tempTask(void *pvParameters) {
Serial.println("tempTask loop started");
while (1) // tempTask loop
{
if (tasksEnabled && !gotNewTemperature) { // Read temperature only if old data was processed already
// Reading temperature for humidity takes about 250 milliseconds!
// Sensor readings may also be up to 2 seconds 'old' (it's a very slow sensor)
sensor1Data = dhtSensor1.getTempAndHumidity(); // Read values from sensor 1
gotNewTemperature = true;
}
vTaskSuspend(NULL);
}
}
void tftTask(void *pvParameters) {
while (1) // tempTask loop
{
vTaskDelay(2000);
// Serial.println("Sensor 1 data:");
// Serial.println("Temp: " + String(sensor1Data.temperature,2) + "'C Humidity: " + String(sensor1Data.humidity,1) + "%");
//数据更新
// tft.fillRect(5+11*6,15,12*5,15,ST77XX_BLACK);
// tft.fillRect(5+11*10, 40,12*2,15,ST77XX_BLACK);
tft.setTextSize(2);tft.setTextColor(ST77XX_WHITE, ST77XX_BLACK);
tft.setCursor(5+11*6, 15);tft.print(String(sensor1Data.temperature,2));
tft.setCursor(5+11*10, 40); tft.print(String(sensor1Data.humidity,0)+"%");
//电池电压显示：
//int analogValue = analogRead(0);
int analogVolts = analogReadMilliVolts(0);
tft.setTextSize(1);
tft.setCursor(3, 3);
tft.print(String(analogVolts*0.002,2)+"V");
gotNewTemperature = false;
}
}
/**
* triggerGetTemp
* Sets flag dhtUpdated to true for handling in loop()
* called by Ticker tempTicker
*/
void triggerGetTemp() {
if (tempTaskHandle != NULL) {
xTaskResumeFromISR(tempTaskHandle);
}
}
/**
* Arduino setup function (called once after boot/reboot)
*/
void setup() {
Serial.begin(115200);
//set the resolution to 12 bits (0-4096)
analogReadResolution(12);
//Init ST7735S mini display
tft.initR(INITR_MINI160x80_PLUGIN);
tft.setRotation(1);tft.fillScreen(ST77XX_BLACK);
pinMode(tft_blk,OUTPUT);digitalWrite(tft_blk,HIGH);
//输出固定文字
tft.setTextSize(2); tft.setTextColor(ST77XX_WHITE, ST77XX_BLACK);
tft.setCursor(5, 15);tft.print("Temp: ");
tft.setCursor(5, 40);tft.print("Humidity: ");
// Initialize temperature sensor 1
dhtSensor1.setup(dhtPin1, DHTesp::DHT11);
xTaskCreatePinnedToCore(
tftTask, /* Function to implement the task */
"tftTask ", /* Name of the task */
4000, /* Stack size in words */
NULL, /* Task input parameter */
4, /* Priority of the task */
&tftTaskHandle, /* Task handle. */
1); /* Core where the task should run */
// Start task to get temperature
xTaskCreatePinnedToCore(
tempTask, /* Function to implement the task */
"tempTask ", /* Name of the task */
4000, /* Stack size in words */
NULL, /* Task input parameter */
5, /* Priority of the task */
&tempTaskHandle, /* Task handle. */
1); /* Core where the task should run */
if (tempTaskHandle == NULL) {
Serial.println(" Failed to start task for temperature update");
} else {
// Start update of environment data every 30 seconds
tempTicker.attach(2, triggerGetTemp);
}
// Signal end of setup() to tasks
tasksEnabled = true;
} // End of setup.
/**
* loop
* Arduino loop function, called once 'setup' is complete (your own code should go here)
*/
void loop() {
} // End of loop
2、效果图：
如果大家和我一样，遇到tft彩屏边缘有彩条，则需要更改库文件Adafruit_ST7735.cpp中的屏幕偏移值，操作步骤如下：
3、参考链接：
[*]https://wiki.dfrobot.com.cn/_SKU_DFR1075_FireBeetle_2_Board_ESP32_C6
[*]https://wiki.dfrobot.com.cn/_SKU_DFR1075_FireBeetle_2_Board_ESP32_C6_Basic_Tutorial
[*]https://wiki.dfrobot.com.cn/_SKU_DFR1075_FireBeetle_2_Board_ESP32_C6_Advanced_Tutorial
页:
[1]