evan
eec9b692c6
Adds a wifi binding over the Arduino API and a settings flow that scans, picks the strongest AP per SSID, takes a password from an on-screen keyboard, and reports connection state. Credentials join /settings.lua and reconnect at boot. Settings are now written through a temp file and rename, and strings are Lua-escaped, so a password cannot corrupt the file the firmware parses at boot.
84 lines
2.1 KiB
C++
84 lines
2.1 KiB
C++
#include <SD.h>
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#include <SPI.h>
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#include <TFT_eSPI.h>
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#include <WiFi.h>
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#include <XPT2046_Touchscreen.h>
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#include "lua/lua_app.h"
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#include "settings.h"
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// SD card is on a separate bus from the display/touch (board schematic)
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static constexpr int SD_CS = 5;
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static constexpr int SD_SCK = 18;
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static constexpr int SD_MOSI = 23;
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static constexpr int SD_MISO = 19;
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static constexpr int TOUCH_CS = 33;
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static const char* LAUNCHER = "/apps/launcher/main.lua";
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TFT_eSPI tft;
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SPIClass touchSpi(HSPI);
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SPIClass& sdSpi = SPI;
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XPT2046_Touchscreen touch(TOUCH_CS);
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LuaApp app(tft, touch);
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bool halted = false;
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String nextApp;
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// Last resort only: the UI lives in Lua, so this exists purely to explain why
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// nothing else could run.
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void fallbackScreen(const char* message) {
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tft.setRotation(0);
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tft.fillScreen(TFT_WHITE);
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tft.setTextColor(TFT_RED, TFT_WHITE);
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tft.drawString(message, 10, 10);
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tft.setTextColor(TFT_BLACK, TFT_WHITE);
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tft.drawString("expected /apps/launcher/main.lua", 10, 30);
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Serial.printf("halted: %s\n", message);
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halted = true;
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}
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void startApp(const String& path) {
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tft.setRotation(settings.rotationIndex()); // apps may have rotated the frame
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Serial.printf("launching %s\n", path.c_str());
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if (app.load(path.c_str())) return;
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if (path == LAUNCHER) fallbackScreen("launcher failed to start");
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}
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void setup() {
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Serial.begin(115200);
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tft.begin();
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tft.setRotation(0);
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tft.fillScreen(TFT_WHITE);
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touchSpi.begin(14, 12, 13, TOUCH_CS);
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touch.begin(touchSpi);
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sdSpi.begin(SD_SCK, SD_MISO, SD_MOSI, SD_CS);
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if (!SD.begin(SD_CS, sdSpi)) {
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fallbackScreen("SD card mount failed");
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return;
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}
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settings.load(); // absent file keeps the built-in defaults
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WiFi.persistent(false);
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if (settings.wifiSsid.length()) {
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WiFi.mode(WIFI_STA);
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WiFi.begin(settings.wifiSsid.c_str(), settings.wifiPassword.c_str());
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}
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startApp(LAUNCHER);
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}
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void loop() {
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if (halted) return;
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if (app.running()) {
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app.loop();
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if (!app.running()) nextApp = app.takePendingLaunch();
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return;
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}
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String path = nextApp.length() > 0 ? nextApp : String(LAUNCHER);
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nextApp = "";
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startApp(path);
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delay(10);
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}
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