Arduino 5.0" TFT 和 RA8875 驱动问题

Question

昨天我收到了我的 RA8875 驱动程序和 5.0" TFT 显示器的货物。我在驱动程序和显示器到达之前做了一些阅读，并使用了库中的示例程序以获得一些初步帮助。TFT 没有似乎出于某种原因正在工作。我通过在串行监视器中使用一些初始化命令来进行故障排除，这些命令表明屏幕已启用并且检测到 RA8875。

这些是我在 Arduino 和驱动程序之间的有线连接： SCLK 到 UNO Digital #13（硬件 SPI 时钟） MISO 到 UNO Digital #12（硬件 SPI MISO） MOSI 到 UNO Digital #11（硬件 SPI MOSI） INT 到 UNO 数字 #3 CS 到 UNO 数字 #10 重置为 UNO Digital #9 车辆识别号 -> 3.3V 接地 -> 接地

我真的不确定是我的接线有问题还是ribbon pin有问题。有人可以帮忙吗？

以下是示例中的代码：

#include <SPI.h>
#include "Adafruit_GFX.h"
#include "Adafruit_RA8875.h"


// Library only supports hardware SPI at this time
// Connect SCLK to UNO Digital #13 (Hardware SPI clock)
// Connect MISO to UNO Digital #12 (Hardware SPI MISO)
// Connect MOSI to UNO Digital #11 (Hardware SPI MOSI)
#define RA8875_INT 3
#define RA8875_CS 10
#define RA8875_RESET 9

Adafruit_RA8875 tft = Adafruit_RA8875(RA8875_CS, RA8875_RESET);
uint16_t tx, ty;

void setup() 
{
  Serial.begin(9600);
  Serial.println("RA8875 start");

  /* Initialise the display using 'RA8875_480x272' or 'RA8875_800x480' */
  if (!tft.begin(RA8875_480x272)) {
    Serial.println("RA8875 Not Found!");
    while (1);
  }

  Serial.println("Found RA8875");

  tft.displayOn(true);
  tft.GPIOX(true);      // Enable TFT - display enable tied to GPIOX
  tft.PWM1config(true, RA8875_PWM_CLK_DIV1024); // PWM output for backlight
  tft.PWM1out(255);

  // With hardware accelleration this is instant
  tft.fillScreen(RA8875_WHITE);

  // Play with PWM
  for (uint8_t i=255; i!=0; i-=5 ) 
  {
    tft.PWM1out(i); 
    delay(10);
  }  
  for (uint8_t i=0; i!=255; i+=5 ) 
  {
    tft.PWM1out(i); 
    delay(10);
  }
  tft.PWM1out(255); 

  tft.fillScreen(RA8875_RED);
  delay(500);
  tft.fillScreen(RA8875_YELLOW);
  delay(500);
  tft.fillScreen(RA8875_GREEN);
  delay(500);
  tft.fillScreen(RA8875_CYAN);
  delay(500);
  tft.fillScreen(RA8875_MAGENTA);
  delay(500);
  tft.fillScreen(RA8875_BLACK);

  // Try some GFX acceleration!
  tft.drawCircle(100, 100, 50, RA8875_BLACK);
  tft.fillCircle(100, 100, 49, RA8875_GREEN);

  tft.fillRect(11, 11, 398, 198, RA8875_BLUE);
  tft.drawRect(10, 10, 400, 200, RA8875_GREEN);
  tft.fillRoundRect(200, 10, 200, 100, 10, RA8875_RED);
  tft.drawPixel(10,10,RA8875_BLACK);
  tft.drawPixel(11,11,RA8875_BLACK);
  tft.drawLine(10, 10, 200, 100, RA8875_RED);
  tft.drawTriangle(200, 15, 250, 100, 150, 125, RA8875_BLACK);
  tft.fillTriangle(200, 16, 249, 99, 151, 124, RA8875_YELLOW);
  tft.drawEllipse(300, 100, 100, 40, RA8875_BLACK);
  tft.fillEllipse(300, 100, 98, 38, RA8875_GREEN);
  // Argument 5 (curvePart) is a 2-bit value to control each corner (select     0, 1, 2, or 3)
  tft.drawCurve(50, 100, 80, 40, 2, RA8875_BLACK);  
  tft.fillCurve(50, 100, 78, 38, 2, RA8875_WHITE);

  pinMode(RA8875_INT, INPUT);
  digitalWrite(RA8875_INT, HIGH);

  tft.touchEnable(true);

  Serial.print("Status: "); Serial.println(tft.readStatus(), HEX);
  Serial.println("Waiting for touch events ...");
}

void loop() 
{
  float xScale = 1024.0F/tft.width();
  float yScale = 1024.0F/tft.height();

  /* Wait around for touch events */
  if (! digitalRead(RA8875_INT)) 
  {
    if (tft.touched()) 
    {
      Serial.print("Touch: "); 
      tft.touchRead(&tx, &ty);
      Serial.print(tx); Serial.print(", "); Serial.println(ty);
      /* Draw a circle */
      tft.fillCircle((uint16_t)(tx/xScale), (uint16_t)(ty/yScale), 4,         RA8875_WHITE);
    } 
  }
}

谢谢

Answer 1

我认为这个问题的部分原因可能是因为tft需要5V。我刚刚查看了数据表：p

Answer 2

原因是您没有将其附加到您的 VIN。那样做，你就会好起来的。

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