星期五, 9月 13, 2024
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凌顺实验室

凌晨时分，顺便做个实验

ESP32 指南 

ESP32 使用TFT_eSPI 点亮1.54寸IPS全视角TFT屏幕（ST7789系列 240×240）

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实现效果

凌顺实验室（lingshunlab.com）在本示例中，主要运行TFT_eSPI库的TFT_graphicstest_one_lib程序，对1.54寸的ST7789屏幕进行测试。

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TFT_eSPI 特性

github仓库地址：https://github.com/Bodmer/TFT_eSPI

TFT_eSPI是一个功能丰富的Arduino IDE兼容的32位处理器的图形和字体库。该库针对32位处理器，它已经为RP2040、STM32、ESP8266和ESP32类型进行了性能优化，其他32位处理器也可以使用，但会使用较慢的通用Arduino接口调用。该库可以使用Arduino IDE的库管理器加载。直接内存访问（DMA）可用于ESP32、RP2040和STM32处理器的SPI接口显示，以提高渲染性能。只有RP2040支持带有并行接口（8位和16位）的DMA。

对ESP32 S2/C3/S3的更新意味着该库需要ESP32 Arduino板包2.x.x或更高版本。

屏幕控制器、接口引脚和库的配置设置必须在库中定义。它们不能被定义在Arduino草图中。详见User_Setup_Select.h文件。这种方法有很大的优势，它使例子不受冗长的配置选项的影响，一旦设置被定义，任何例子都可以不加修改的运行。PlatformIO用户可以在platformio.ini文件中以每个项目为基础定义这些设置，见库中的Docs文件夹。

TFT_eSPI库 支持的屏幕芯片型号

  • GC9A01
  • ILI9163
  • ILI9225
  • ILI9341
  • ILI9342
  • ILI9481 (DMA not supported with SPI)
  • ILI9486 (DMA not supported with SPI)
  • ILI9488 (DMA not supported with SPI)
  • HX8357B (16 bit parallel tested with RP2040)
  • HX8357C (16 bit parallel tested with RP2040)
  • HX8357D
  • R61581
  • RM68120 (support files added but untested)
  • RM68140
  • S6D02A1
  • SSD1351
  • SSD1963 (this controller only has a parallel interface option)
  • ST7735
  • ST7789
  • ST7796

TFT_eSPI 支持的开发板和SPI类型

Processor 4 wire SPI 8 bit parallel 16 bit parallel DMA support
RP2040 Yes Yes Yes Yes (all)
ESP32 Yes Yes No Yes (SPI only)
ESP32 C3 Yes No No No
ESP32 S2 Yes No No No
ESP32 S3 Yes Yes No Yes (SPI only)
ESP8266 Yes No No No
STM32Fxxx Yes Yes No Yes (SPI only)
Other Yes No No No

凌顺实验室（lingshunlab.cpom）对本文的编辑时间为2023年3月，之后如有更新变化，请访问仓库地址进行查阅 https://github.com/Bodmer/TFT_eSPI

引脚说明

模块引脚 引脚说明
GND 液晶屏电源地
VCC 液晶屏电源正(3.3V)
SCL 液晶屏SPI总线时钟信号
SDA 液晶屏SPI总线写数据信号
RES 液晶屏复位控制信号（低电平复位）
DC 液晶屏寄存器/数据选择控制信号（低电平：寄存器，高电平：数据）
CS 液晶屏片选控制信号（低电平使能）
BLK 液晶屏背光控制信号（高电平点亮，如不需要控制，请接3.3V）

BOM

名称 数量
ESP32 开发板 x1
ST7789 1.54' x1
跳线（杜邦线） 若干

接线

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安装库

方法一：通过Arduino IDE 2 的安装方法

1，点击Library

2，搜索框输入「TFT_eSPI」

3，点击「INSTALL」进行安装

4，安装完成后，该库的名称旁边会显示「INSTALLED」

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方法二：GITHUB 仓库下载安装方法

1，首先到GITHUB下载「TFT_eSPI」：https://github.com/Bodmer/TFT_eSPI

2，解压

3，把解压的文件放进Arduino IDE的libraries文件夹

配置屏幕

在本示例中，使用的是ESP32和ST7789，240x240分辨率的屏幕，所以我们需要对屏幕进行配置

1，找到配置文件

安装好库之后，这个User_Setup.h配置文件的位置在Arduino IDE的libraries的文件夹里的tft_eSPI

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2，修改配置文件

本示例使用的是ESP32 和 ST7789系列的240x240分辨率屏幕，根据接线图配置，把User_Setup.h修改成如下代码：

// Welcome to lingshunlab.com

// Setup for the ESP32 with ST7789 display
#define USER_SETUP_ID 18
// See SetupX_Template.h for all options available
#define ST7789_DRIVER

// Typical board default pins
#define TFT_CS       5 // Chip select control pin
// #define TFT_MISO 13 //  
#define TFT_MOSI  23 //  In some display driver board, it might be written as "SDA" and so on.
#define TFT_SCLK  18 //  
#define TFT_DC      13 // Data Command control pin
#define TFT_RST    14 // 
#define TFT_BL       12  // LED back-light
//#define TOUCH_CS 16 // Optional for touch screen

#define TFT_WIDTH    240
#define TFT_HEIGHT  240 

#define LOAD_GLCD   // Font 1. Original Adafruit 8 pixel font needs ~1820 bytes in FLASH
#define LOAD_FONT2  // Font 2. Small 16 pixel high font, needs ~3534 bytes in FLASH, 96 characters
#define LOAD_FONT4  // Font 4. Medium 26 pixel high font, needs ~5848 bytes in FLASH, 96 characters
#define LOAD_FONT6  // Font 6. Large 48 pixel font, needs ~2666 bytes in FLASH, only characters 1234567890:-.apm
#define LOAD_FONT7  // Font 7. 7 segment 48 pixel font, needs ~2438 bytes in FLASH, only characters 1234567890:-.
#define LOAD_FONT8  // Font 8. Large 75 pixel font needs ~3256 bytes in FLASH, only characters 1234567890:-.
#define LOAD_GFXFF  // FreeFonts. Include access to the 48 Adafruit_GFX free fonts FF1 to FF48 and custom fonts

#define SMOOTH_FONT

// FSPI port will be used unless the following is defined
// #define USE_HSPI_PORT

// #define SPI_FREQUENCY  20000000
// #define SPI_FREQUENCY  27000000
// #define SPI_FREQUENCY  40000000
#define SPI_FREQUENCY  80000000

#define SPI_READ_FREQUENCY  6000000 // 6 MHz is the maximum SPI read speed for the ST7789V

#define SPI_TOUCH_FREQUENCY 2500000

// 如果遇到红色为蓝色，蓝色为红色的话，去掉以下一行的注释，重定义TFT的颜色顺序，一般使用默认值，颜色顺序没有问题的可以不用理会。
// #define TFT_RGB_ORDER TFT_RGB  // Colour order Red-Green-Blue
// #define TFT_RGB_ORDER TFT_BGR  // Colour order Blue-Green-Red

在tft_eSPI的文件夹里，有个文件夹「User_Setups」，里面有其他屏幕系列的配置文件，可以参考。

测试程序代码

// Welcome to lingshunlab.com

#include "SPI.h"
#include "TFT_eSPI.h"

TFT_eSPI tft = TFT_eSPI();

unsigned long total = 0;
unsigned long tn = 0;
void setup() {
  Serial.begin(9600);
  while (!Serial);

  Serial.println(""); Serial.println("");
  Serial.println("TFT_eSPI library test!");

  tft.init();

  tn = micros();
  tft.fillScreen(TFT_BLACK);

  yield(); Serial.println(F("Benchmark                Time (microseconds)"));

  yield(); Serial.print(F("Screen fill              "));
  yield(); Serial.println(testFillScreen());
  //total+=testFillScreen();
  //delay(500);

  yield(); Serial.print(F("Text                     "));
  yield(); Serial.println(testText());
  //total+=testText();
  //delay(3000);

  yield(); Serial.print(F("Lines                    "));
  yield(); Serial.println(testLines(TFT_CYAN));
  //total+=testLines(TFT_CYAN);
  //delay(500);

  yield(); Serial.print(F("Horiz/Vert Lines         "));
  yield(); Serial.println(testFastLines(TFT_RED, TFT_BLUE));
  //total+=testFastLines(TFT_RED, TFT_BLUE);
  //delay(500);

  yield(); Serial.print(F("Rectangles (outline)     "));
  yield(); Serial.println(testRects(TFT_GREEN));
  //total+=testRects(TFT_GREEN);
  //delay(500);

  yield(); Serial.print(F("Rectangles (filled)      "));
  yield(); Serial.println(testFilledRects(TFT_YELLOW, TFT_MAGENTA));
  //total+=testFilledRects(TFT_YELLOW, TFT_MAGENTA);
  //delay(500);

  yield(); Serial.print(F("Circles (filled)         "));
  yield(); Serial.println(testFilledCircles(10, TFT_MAGENTA));
  //total+= testFilledCircles(10, TFT_MAGENTA);

  yield(); Serial.print(F("Circles (outline)        "));
  yield(); Serial.println(testCircles(10, TFT_WHITE));
  //total+=testCircles(10, TFT_WHITE);
  //delay(500);

  yield(); Serial.print(F("Triangles (outline)      "));
  yield(); Serial.println(testTriangles());
  //total+=testTriangles();
  //delay(500);

  yield(); Serial.print(F("Triangles (filled)       "));
  yield(); Serial.println(testFilledTriangles());
  //total += testFilledTriangles();
  //delay(500);

  yield(); Serial.print(F("Rounded rects (outline)  "));
  yield(); Serial.println(testRoundRects());
  //total+=testRoundRects();
  //delay(500);

  yield(); Serial.print(F("Rounded rects (filled)   "));
  yield(); Serial.println(testFilledRoundRects());
  //total+=testFilledRoundRects();
  //delay(500);

  yield(); Serial.println(F("Done!")); yield();
  //Serial.print(F("Total = ")); Serial.println(total);

  //yield();Serial.println(millis()-tn);
}

void loop(void) {
  for (uint8_t rotation = 0; rotation < 4; rotation++) {
    tft.setRotation(rotation);
    testText();
    delay(2000);
  }
}

unsigned long testFillScreen() {
  unsigned long start = micros();
  tft.fillScreen(TFT_BLACK);
  tft.fillScreen(TFT_RED);
  tft.fillScreen(TFT_GREEN);
  tft.fillScreen(TFT_BLUE);
  tft.fillScreen(TFT_BLACK);
  return micros() - start;
}

unsigned long testText() {
  tft.fillScreen(TFT_BLACK);
  unsigned long start = micros();
  tft.setCursor(0, 0);
  tft.setTextColor(TFT_WHITE);  tft.setTextSize(2);
  tft.println("LingShunLAB.com");
  tft.setTextColor(TFT_YELLOW); tft.setTextSize(2);
  tft.println(1234.56);
  tft.setTextColor(TFT_RED);    tft.setTextSize(3);
  tft.println(0xDEADBEEF, HEX);
  tft.println();
  tft.setTextColor(TFT_GREEN);
  tft.setTextSize(5);
  tft.println("Groop");
  tft.setTextSize(2);
  tft.println("I implore thee,");
  //tft.setTextColor(TFT_GREEN,TFT_BLACK);
  tft.setTextSize(1);
  tft.println("my foonting turlingdromes.");
  tft.println("And hooptiously drangle me");
  tft.println("with crinkly bindlewurdles,");
  tft.println("Or I will rend thee");
  tft.println("in the gobberwarts");
  tft.println("with my blurglecruncheon,");
  tft.println("see if I don't!");
  return micros() - start;
}

unsigned long testLines(uint16_t color) {
  unsigned long start, t;
  int           x1, y1, x2, y2,
                w = tft.width(),
                h = tft.height();

  tft.fillScreen(TFT_BLACK);

  x1 = y1 = 0;
  y2    = h - 1;
  start = micros();
  for (x2 = 0; x2 < w; x2 += 6) tft.drawLine(x1, y1, x2, y2, color);
  x2    = w - 1;
  for (y2 = 0; y2 < h; y2 += 6) tft.drawLine(x1, y1, x2, y2, color);
  t     = micros() - start; // fillScreen doesn't count against timing

  tft.fillScreen(TFT_BLACK);

  x1    = w - 1;
  y1    = 0;
  y2    = h - 1;
  start = micros();
  for (x2 = 0; x2 < w; x2 += 6) tft.drawLine(x1, y1, x2, y2, color);
  x2    = 0;
  for (y2 = 0; y2 < h; y2 += 6) tft.drawLine(x1, y1, x2, y2, color);
  t    += micros() - start;

  tft.fillScreen(TFT_BLACK);

  x1    = 0;
  y1    = h - 1;
  y2    = 0;
  start = micros();
  for (x2 = 0; x2 < w; x2 += 6) tft.drawLine(x1, y1, x2, y2, color);
  x2    = w - 1;
  for (y2 = 0; y2 < h; y2 += 6) tft.drawLine(x1, y1, x2, y2, color);
  t    += micros() - start;

  tft.fillScreen(TFT_BLACK);

  x1    = w - 1;
  y1    = h - 1;
  y2    = 0;
  start = micros();
  for (x2 = 0; x2 < w; x2 += 6) tft.drawLine(x1, y1, x2, y2, color);
  x2    = 0;
  for (y2 = 0; y2 < h; y2 += 6) tft.drawLine(x1, y1, x2, y2, color);

  return micros() - start;
}

unsigned long testFastLines(uint16_t color1, uint16_t color2) {
  unsigned long start;
  int           x, y, w = tft.width(), h = tft.height();

  tft.fillScreen(TFT_BLACK);
  start = micros();
  for (y = 0; y < h; y += 5) tft.drawFastHLine(0, y, w, color1);
  for (x = 0; x < w; x += 5) tft.drawFastVLine(x, 0, h, color2);

  return micros() - start;
}

unsigned long testRects(uint16_t color) {
  unsigned long start;
  int           n, i, i2,
                cx = tft.width()  / 2,
                cy = tft.height() / 2;

  tft.fillScreen(TFT_BLACK);
  n     = min(tft.width(), tft.height());
  start = micros();
  for (i = 2; i < n; i += 6) {
    i2 = i / 2;
    tft.drawRect(cx - i2, cy - i2, i, i, color);
  }

  return micros() - start;
}

unsigned long testFilledRects(uint16_t color1, uint16_t color2) {
  unsigned long start, t = 0;
  int           n, i, i2,
                cx = tft.width()  / 2 - 1,
                cy = tft.height() / 2 - 1;

  tft.fillScreen(TFT_BLACK);
  n = min(tft.width(), tft.height());
  for (i = n - 1; i > 0; i -= 6) {
    i2    = i / 2;
    start = micros();
    tft.fillRect(cx - i2, cy - i2, i, i, color1);
    t    += micros() - start;
    // Outlines are not included in timing results
    tft.drawRect(cx - i2, cy - i2, i, i, color2);
  }

  return t;
}

unsigned long testFilledCircles(uint8_t radius, uint16_t color) {
  unsigned long start;
  int x, y, w = tft.width(), h = tft.height(), r2 = radius * 2;

  tft.fillScreen(TFT_BLACK);
  start = micros();
  for (x = radius; x < w; x += r2) {
    for (y = radius; y < h; y += r2) {
      tft.fillCircle(x, y, radius, color);
    }
  }

  return micros() - start;
}

unsigned long testCircles(uint8_t radius, uint16_t color) {
  unsigned long start;
  int           x, y, r2 = radius * 2,
                      w = tft.width()  + radius,
                      h = tft.height() + radius;

  // Screen is not cleared for this one -- this is
  // intentional and does not affect the reported time.
  start = micros();
  for (x = 0; x < w; x += r2) {
    for (y = 0; y < h; y += r2) {
      tft.drawCircle(x, y, radius, color);
    }
  }

  return micros() - start;
}

unsigned long testTriangles() {
  unsigned long start;
  int           n, i, cx = tft.width()  / 2 - 1,
                      cy = tft.height() / 2 - 1;

  tft.fillScreen(TFT_BLACK);
  n     = min(cx, cy);
  start = micros();
  for (i = 0; i < n; i += 5) {
    tft.drawTriangle(
      cx    , cy - i, // peak
      cx - i, cy + i, // bottom left
      cx + i, cy + i, // bottom right
      tft.color565(0, 0, i));
  }

  return micros() - start;
}

unsigned long testFilledTriangles() {
  unsigned long start, t = 0;
  int           i, cx = tft.width()  / 2 - 1,
                   cy = tft.height() / 2 - 1;

  tft.fillScreen(TFT_BLACK);
  start = micros();
  for (i = min(cx, cy); i > 10; i -= 5) {
    start = micros();
    tft.fillTriangle(cx, cy - i, cx - i, cy + i, cx + i, cy + i,
                     tft.color565(0, i, i));
    t += micros() - start;
    tft.drawTriangle(cx, cy - i, cx - i, cy + i, cx + i, cy + i,
                     tft.color565(i, i, 0));
  }

  return t;
}

unsigned long testRoundRects() {
  unsigned long start;
  int           w, i, i2,
                cx = tft.width()  / 2 - 1,
                cy = tft.height() / 2 - 1;

  tft.fillScreen(TFT_BLACK);
  w     = min(tft.width(), tft.height());
  start = micros();
  for (i = 0; i < w; i += 6) {
    i2 = i / 2;
    tft.drawRoundRect(cx - i2, cy - i2, i, i, i / 8, tft.color565(i, 0, 0));
  }

  return micros() - start;
}

unsigned long testFilledRoundRects() {
  unsigned long start;
  int           i, i2,
                cx = tft.width()  / 2 - 1,
                cy = tft.height() / 2 - 1;

  tft.fillScreen(TFT_BLACK);
  start = micros();
  for (i = min(tft.width(), tft.height()); i > 20; i -= 6) {
    i2 = i / 2;
    tft.fillRoundRect(cx - i2, cy - i2, i, i, i / 8, tft.color565(0, i, 0));
  }

  return micros() - start;
}

/***************************************************
  Original Adafruit text:

  This is an example sketch for the Adafruit 2.2" SPI display.
  This library works with the Adafruit 2.2" TFT Breakout w/SD card
  ----> http://www.adafruit.com/products/1480

  Check out the links above for our tutorials and wiring diagrams
  These displays use SPI to communicate, 4 or 5 pins are required to
  interface (RST is optional)
  Adafruit invests time and resources providing this open source code,
  please support Adafruit and open-source hardware by purchasing
  products from Adafruit!

  Written by Limor Fried/Ladyada for Adafruit Industries.
  MIT license, all text above must be included in any redistribution
 ****************************************************/

程序上传完后，就会见到屏幕以非常快的速度在测试。

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