kopia lustrzana https://github.com/Xinyuan-LilyGO/TTGO-T-Display
init
lewisxhe
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build
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other
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# TTGO T-Display
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## 1.Install the following dependency library files:
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- [TFT_eSPI](https://github.com/lewisxhe/TFT_eSPI)
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- [Button2](https://github.com/lewisxhe/Button2)
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## 2.TFT_eSPI settings
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- Move or copy `User_Setups/TTGO_T_Display.h` to `TFT_eSPI/User_Setups/`
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- Add `#include <User_Setups/TTGO_T_Display.h>` to `TFT_eSPI/User_Setup_Select.h`
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## Pinout
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| Name | V18 |
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| ---------- | ------ |
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| TFT Driver | ST7789 |
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| TFT_MISO | N/A |
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| TFT_MOSI | 19 |
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| TFT_SCLK | 18 |
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| TFT_CS | 5 |
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| TFT_DC | 16 |
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| TFT_RST | N/A |
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| TFT_BL | 14 |
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| I2C_SDA | 21 |
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| I2C_SCL | 22 |
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| ADC_IN | 34 |
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| BUTTON1 | 35 |
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| BUTTON2 | 0 |
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#include <TFT_eSPI.h>
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#include <SPI.h>
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#include "WiFi.h"
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#include <Wire.h>
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#include <Button2.h>
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#include "esp_adc_cal.h"
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#include <Ticker.h>
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#define TFT_MOSI 19
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#define TFT_SCLK 18
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#define TFT_CS 5
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#define TFT_DC 16
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#define TFT_RST 23
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#define TFT_BL 14 // Dispaly backlight control pin
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#define ADC_PIN 34
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#define BUTTON_1 35
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#define BUTTON_2 0
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#define BUTTONS_MAP {BUTTON_1,BUTTON_2}
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TFT_eSPI tft = TFT_eSPI(135, 240); // Invoke custom library
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Button2 *pBtns = nullptr;
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uint8_t g_btns[] = BUTTONS_MAP;
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char buff[512];
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int vref = 1100;
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int btnCick = false;
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Ticker tick;
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void showVoltage()
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{
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static uint64_t timeStamp = 0;
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if (millis() - timeStamp > 1000) {
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timeStamp = millis();
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uint16_t v = analogRead(ADC_PIN);
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float battery_voltage = ((float)v / 4095.0) * 2.0 * 3.3 * (vref / 1000.0);
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String voltage = "Voltage :" + String(battery_voltage) + "V";
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tft.fillScreen(TFT_BLACK);
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tft.setTextDatum(MC_DATUM);
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tft.drawString(voltage, tft.width() / 2, tft.height() / 2 );
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}
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}
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void button_init()
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{
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uint8_t args = sizeof(g_btns) / sizeof(g_btns[0]);
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pBtns = new Button2 [args];
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pBtns[0] = Button2(g_btns[0]);
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pBtns[1] = Button2(g_btns[1]);
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pBtns[0].setLongClickHandler([](Button2 & b) {
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btnCick = false;
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int r = digitalRead(TFT_BL);
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tft.fillScreen(TFT_BLACK);
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tft.setTextColor(TFT_GREEN, TFT_BLACK);
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tft.setTextDatum(MC_DATUM);
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tft.drawString("Press again to wake up", tft.width() / 2, tft.height() / 2 );
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delay(6000);
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digitalWrite(TFT_BL, !r);
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esp_sleep_enable_ext1_wakeup(GPIO_SEL_35, ESP_EXT1_WAKEUP_ALL_LOW);
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esp_deep_sleep_start();
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});
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pBtns[0].setPressedHandler([](Button2 & b) {
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Serial.println("Detect Voltage..");
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btnCick = true;
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});
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pBtns[1].setPressedHandler([](Button2 & b) {
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btnCick = false;
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Serial.println("btn press wifi scan");
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wifi_scan();
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});
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}
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void button_loop()
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{
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for (int i = 0; i < sizeof(g_btns) / sizeof(g_btns[0]); ++i) {
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pBtns[i].loop();
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}
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}
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void wifi_scan()
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{
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tft.setTextColor(TFT_GREEN, TFT_BLACK);
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tft.fillScreen(TFT_BLACK);
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tft.setTextDatum(MC_DATUM);
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tft.setTextSize(1);
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tft.drawString("Scan Network", tft.width() / 2, tft.height() / 2);
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WiFi.mode(WIFI_STA);
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WiFi.disconnect();
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delay(100);
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int16_t n = WiFi.scanNetworks();
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tft.fillScreen(TFT_BLACK);
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if (n == 0) {
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tft.drawString("no networks found", tft.width() / 2, tft.height() / 2);
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} else {
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tft.setTextDatum(TL_DATUM);
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tft.setCursor(0, 0);
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Serial.printf("Fount %d net\n", n);
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for (int i = 0; i < n; ++i) {
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sprintf(buff,
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"[%d]:%s(%d)",
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i + 1,
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WiFi.SSID(i).c_str(),
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WiFi.RSSI(i));
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tft.println(buff);
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}
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}
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}
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void setup()
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{
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Serial.begin(115200);
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delay(1000);
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tft.init();
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tft.setRotation(0);
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tft.fillScreen(TFT_BLACK);
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tft.setTextSize(2);
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tft.setTextColor(TFT_WHITE);
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tft.setCursor(0, 0);
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tft.setTextDatum(MC_DATUM);
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tft.drawString("TTGO", tft.width() / 2, tft.height() / 2 );
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tft.setTextSize(1);
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if (TFT_BL > 0) {
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pinMode(TFT_BL, OUTPUT);
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digitalWrite(TFT_BL, HIGH);
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}
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button_init();
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esp_adc_cal_characteristics_t adc_chars;
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esp_adc_cal_value_t val_type = esp_adc_cal_characterize((adc_unit_t)ADC_UNIT_1, (adc_atten_t)ADC1_CHANNEL_6, (adc_bits_width_t)ADC_WIDTH_BIT_12, 1100, &adc_chars);
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//Check type of calibration value used to characterize ADC
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if (val_type == ESP_ADC_CAL_VAL_EFUSE_VREF) {
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Serial.printf("eFuse Vref:%u mV", adc_chars.vref);
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vref = adc_chars.vref;
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} else if (val_type == ESP_ADC_CAL_VAL_EFUSE_TP) {
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Serial.printf("Two Point --> coeff_a:%umV coeff_b:%umV\n", adc_chars.coeff_a, adc_chars.coeff_b);
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} else {
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Serial.println("Default Vref: 1100mV");
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}
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}
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void loop()
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{
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if (btnCick) {
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showVoltage();
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}
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button_loop();
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}
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#define TFT_WIDTH 135
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#define TFT_HEIGHT 240
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#define ST7789_DRIVER
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#define TFT_MISO -1
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#define TFT_MOSI 19
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#define TFT_SCLK 18
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#define TFT_CS 5
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#define TFT_DC 16
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#define TFT_RST 23
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// Non-standard screen, need to add XY coordinate offset
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#define TTGO_114_INC_DISPLAY
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// #define SPI_FREQUENCY 1000000
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// #define SPI_FREQUENCY 5000000
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// #define SPI_FREQUENCY 10000000
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// #define SPI_FREQUENCY 20000000
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// #define SPI_FREQUENCY 27000000 // Actually sets it to 26.67MHz = 80/3
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// #define SPI_FREQUENCY 40000000 // Maximum to use SPIFFS
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#define SPI_FREQUENCY 80000000
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#define LOAD_GLCD // Font 1. Original Adafruit 8 pixel font needs ~1820 bytes in FLASH
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#define LOAD_FONT2 // Font 2. Small 16 pixel high font, needs ~3534 bytes in FLASH, 96 characters
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#define LOAD_FONT4 // Font 4. Medium 26 pixel high font, needs ~5848 bytes in FLASH, 96 characters
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#define LOAD_FONT6 // Font 6. Large 48 pixel font, needs ~2666 bytes in FLASH, only characters 1234567890:-.apm
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#define LOAD_FONT7 // Font 7. 7 segment 48 pixel font, needs ~2438 bytes in FLASH, only characters 1234567890:.
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#define LOAD_FONT8 // Font 8. Large 75 pixel font needs ~3256 bytes in FLASH, only characters 1234567890:-.
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#define LOAD_GFXFF // FreeFonts. Include access to the 48 Adafruit_GFX free fonts FF1 to FF48 and custom fonts
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#define SMOOTH_FONT
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