Initialisation dépot
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src/README.md
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src/README.md
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# Introduction
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This is the source files folder for the EasyDccMouse.
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EasyDccMouse is a system to remote control DCC scale locomotive, it is based on a ESP32 with tft display, touch screen, encoder and battery.
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EasyDccMouse sends actions to a DCC centrale station.
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```
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+------------------------------------------------------+
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| [O] [⇄] [ID] [⚡] | <-- Header with 4 icons:
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| ON Dir DCC Power | [O] Status (ON/OFF)
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| | [⇄] Direction (Forward/Reverse)
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| [================== Train ===================] | [ID] DCC id
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| | [⚡] Power/Connection
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| |██████████████████████████████████████████| | <-- Model picture (190x40 px)
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| |
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| ___ |
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| .-' '-. |
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| .' '. |
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| / \ |
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| | /\ /\ | | <-- Speedometer (arc + needle)
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| | / \ / \ | |
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| | / \_/ \ | |
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| |/ \| |
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| '---------------' |
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| | | |
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| | | |
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| Needle |
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| |
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| [F1] [F2] [F3] [F4] [F5] [F6] [F7] [F8] | <-- Function pad (row 1)
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| [F9] [F10][F11][F12][F13][F14][F15][F16] | <-- Function pad (row 2)
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+------------------------------------------------------+
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```
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# Implementation
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## How to draw speedometer with arc and needle on my TFT display?
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To draw an arc-style speedometer with a moving needle on your TFT display (e.g., ILI9341), you can use the TFT_eSPI library. Here’s a step-by-step example:
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1. **Draw the arc:**
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- Use `drawArc()` or draw multiple short lines to approximate an arc.
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- Example: Draw an arc from 135° to 45° (like a semicircle at the bottom).
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2. **Draw the needle:**
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- Calculate the angle for the needle based on the speed value.
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- Use `drawLine()` from the center of the arc to the edge at the calculated angle.
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3. **Display the speed value:**
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- Use `setCursor()` and `print()` to show the numeric speed.
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**Example code:**
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```cpp
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#include <TFT_eSPI.h>
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#include <math.h>
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TFT_eSPI tft = TFT_eSPI();
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void drawSpeedometer(int speed) {
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int cx = 120, cy = 120, r = 80; // Center and radius
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int minAngle = 135, maxAngle = 45; // Degrees
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int minSpeed = 0, maxSpeed = 100;
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// Draw arc (approximate with lines)
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for (int a = minAngle; a >= maxAngle; a -= 3) {
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float rad = a * 3.14159 / 180.0;
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int x1 = cx + (r - 10) * cos(rad);
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int y1 = cy + (r - 10) * sin(rad);
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int x2 = cx + r * cos(rad);
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int y2 = cy + r * sin(rad);
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tft.drawLine(x1, y1, x2, y2, TFT_WHITE);
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}
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// Draw needle
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float angle = minAngle - (float)(speed - minSpeed) / (maxSpeed - minSpeed) * (minAngle - maxAngle);
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float rad = angle * 3.14159 / 180.0;
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int nx = cx + (r - 20) * cos(rad);
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int ny = cy + (r - 20) * sin(rad);
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tft.drawLine(cx, cy, nx, ny, TFT_RED);
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// Draw speed value
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tft.setCursor(cx - 20, cy + 30);
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tft.setTextColor(TFT_WHITE, TFT_BLACK);
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tft.setTextSize(2);
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tft.printf("%d", speed);
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}
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```
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**Tips:**
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- Clear the previous needle before drawing a new one for smooth animation.
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- Adjust `cx`, `cy`, and `r` for your display size.
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- You can enhance the arc with tick marks and labels for a more realistic look.
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src/main.cpp
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src/main.cpp
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#include <Arduino.h>
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#include <TFT_eSPI.h>
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#include <WiFi.h>
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#include <ESPAsyncWebServer.h>
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#include <EEPROM.h>
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#include <AsyncTCP.h>
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#include <SD.h>
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#include "color.h"
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void launchWiFiConfig();
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// Read WiFi credentials from EEPROM
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#define WIFI_SSID_ADDR 0
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#define WIFI_PASS_ADDR 64
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#define WIFI_MAX_LEN 32
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#define DEBUG
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#ifdef DEBUG
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char output[80];
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#define DEBUG_MSG(...) snprintf(output,80, __VA_ARGS__ ); \
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Serial.println(output);
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#else
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#define DEBUG_MSG(...)
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#endif
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/* tft */
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#define TFT_BL 21
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TFT_eSPI tft = TFT_eSPI();
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char wifi_ssid[WIFI_MAX_LEN];
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char wifi_pass[WIFI_MAX_LEN];
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void setup()
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{
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Serial.begin(115200);
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DEBUG_MSG("CYD DCC mouse Demo");
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// Turn on backlight and initialize TFT
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pinMode(TFT_BL, OUTPUT);
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digitalWrite(TFT_BL, HIGH); // Backlight ON
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DEBUG_MSG("Backlight ON");
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tft.init();
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DEBUG_MSG("TFT init done");
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DEBUG_MSG("Rotation set");
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// Print hello world on tft
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tft.fillScreen(COLOR_BLACK);
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tft.setTextColor(COLOR_WHITE);
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tft.setTextSize(1);
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tft.setCursor(10, 10);
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tft.println("Initialize Network...");
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DEBUG_MSG("Reading WiFi credentials from EEPROM");
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EEPROM.begin(128);
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for (int i = 0; i < WIFI_MAX_LEN; i++) {
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wifi_ssid[i] = EEPROM.read(WIFI_SSID_ADDR + i);
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wifi_pass[i] = EEPROM.read(WIFI_PASS_ADDR + i);
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}
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wifi_ssid[WIFI_MAX_LEN-1] = '\0';
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wifi_pass[WIFI_MAX_LEN-1] = '\0';
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bool ssid_found = strlen(wifi_ssid) > 0 && wifi_ssid[0] != 0xFF;
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bool pass_found = strlen(wifi_pass) > 0 && wifi_pass[0] != 0xFF;
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if (!ssid_found || !pass_found)
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{
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DEBUG_MSG("WiFi credentials not found in EEPROM");
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tft.setCursor(10, 25);
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tft.setTextColor(COLOR_ORANGE);
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tft.println("WiFi credentials missing!");
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tft.setCursor(10, 40);
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tft.setTextColor(COLOR_YELLOW);
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tft.println("Please connect to CYD_Config AP");
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tft.setCursor(10, 55);
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tft.println("and set WiFi credentials");
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launchWiFiConfig(); // Function to start WiFi configuration mode (not implemented here)
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} else {
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// Ok connect to WiFi
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tft.setCursor(60, 10);
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tft.setTextColor(COLOR_GREEN);
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tft.println("OK");
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DEBUG_MSG("WiFi SSID: %s", wifi_ssid);
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DEBUG_MSG("WiFi PASS: %s", wifi_pass);
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}
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// Try to open SD card and read content
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if (!SD.begin()) {
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tft.println("SD Card not found!");
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while (1); // or handle error as needed
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}
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if (!SD.exists("/loco")) {
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tft.println("loco/ folder not found!");
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while (1); // or handle error as needed
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}
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}
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void loop() {
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// tft.fillScreen(TFT_PURPLE);
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// Serial.println("RED");
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// delay(1000);
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// tft.fillScreen(TFT_GREEN);
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// Serial.println("GREEN");
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// delay(1000);
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// tft.fillScreen(TFT_YELLOW);
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// Serial.println("BLUE");
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// delay(1000);
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// tft.fillScreen(TFT_BLACK);
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// Serial.println("BLACK");
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// delay(1000);
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// tft.fillScreen(TFT_WHITE);
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// Serial.println("WHITE");
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// delay(1000);
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}
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/**
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* launchWiFiConfig() - Placeholder function to start WiFi configuration mode
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* In a real implementation, this would start an access point and web server to allow the user
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* to enter their WiFi credentials through a web interface. For this demo, it's just a placeholder.
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*/
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void launchWiFiConfig()
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{
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// Start WiFi in AP mode, set up a web server, and handle incoming connections to save new credentials to EEPROM
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WiFi.softAP("CYD_Config", "12345678");
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IPAddress myIP = WiFi.softAPIP();
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DEBUG_MSG("AP IP address: %s", myIP.toString().c_str());
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AsyncWebServer server(80);
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server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){
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String html = "<html><body><h2>WiFi Config</h2>"
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"<form action='/save' method='post'>"
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"SSID: <input name='ssid'><br>"
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"Password: <input name='pass' type='password'><br>"
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"<input type='submit' value='Save'></form></body></html>";
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request->send(200, "text/html", html);
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});
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server.on("/save", HTTP_POST, [](AsyncWebServerRequest *request){
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String ssid, pass;
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if (request->hasParam("ssid", true)) ssid = request->getParam("ssid", true)->value();
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if (request->hasParam("pass", true)) pass = request->getParam("pass", true)->value();
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for (int i = 0; i < WIFI_MAX_LEN; i++) {
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EEPROM.write(WIFI_SSID_ADDR + i, i < ssid.length() ? ssid[i] : 0);
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EEPROM.write(WIFI_PASS_ADDR + i, i < pass.length() ? pass[i] : 0);
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}
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EEPROM.commit();
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request->send(200, "text/html", "<html><body>Saved! Reboot device.</body></html>");
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});
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server.begin();
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tft.setCursor(10, 120);
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tft.setTextColor(COLOR_CYAN);
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tft.println("Connect to CYD_Config AP");
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tft.setCursor(10, 135);
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tft.println("Open 192.168.4.1 in browser");
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while (true) { delay(1000); }
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}
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