Hello,
i am quite desperate and looking for help.
I bought a TFT 20 Pin 24 Bit 480x272 Display ( EA R480X-43ALW ) and a Adafruit RA8875 controller for my Arduino Mega and connected the hardware as described in the official tutorial. Unfortunately after turning everything on and uploading the "buildtest" program of the RA8875 library nothing happened.
I have checked every connection twice and don't find the error. I thought about some compatibility-problems because the RA8875 does only support 16Bit and the Display has 24Bit.... But do you think this is the problem?
Thank you very much for your answer!
Picture 1Picture 2
My Code used:
/******************************************************************
This is an example for the Adafruit RA8875 Driver board for TFT displays
---------------> http://www.adafruit.com/products/1590
The RA8875 is a TFT driver for up to 800x480 dotclock'd displays
It is tested to work with displays in the Adafruit shop. Other displays
may need timing adjustments and are not guanteed to work.
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.
BSD license, check license.txt for more information.
All text above must be included in any redistribution.
******************************************************************/
#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");
/* Initialize the display using 'RA8875_480x80', 'RA8875_480x128', '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);
}
}
}
