Hello.
I'm a total beginner here. I'm trying to initialize a 4.3" display using FT813 and an Arduino uno.
I have a shield and all the connections are good.

When I upload the code, all I can see is the backlight turning on. My goal here is to make the display bright blue "CLEAR_COLOR_RGB(0,0,255)"

Here is the code, can you tell me what is wrong and provide an example where you can? (The header file was attached)

#include <SPI.h>
#include "functions.h"






void setup() {
  // put your setup code here, to run once:
pinMode(ChipSelectPin, OUTPUT);
pinMode(INT_N, OUTPUT);
pinMode(PD_N, OUTPUT);
digitalWrite(ChipSelectPin, HIGH);   //When ChipSelectPin is high you can't communicate with FT81X
digitalWrite(INT_N, HIGH);           //deactivate interrupt to host
digitalWrite(PD_N, HIGH);            //deactivate Chip power down mode



Serial.begin(9600);

//initialise SPI
SPI.begin();
SPI.setBitOrder(MSBFIRST);          //Not strictly needed but just to be sure
SPI.setDataMode(SPI_MODE0);         //Not stirctly needed but just to be sure





}


void initialize(){
SPI.setClockDivider(SPI_CLOCK_DIV2);
host_command(CLKEXT);
host_command(ACTIVE);
delay(300);

wr16(REG_HCYCLE, 928);
wr16(REG_HOFFSET, 88);
wr16(REG_HSYNC0, 0);
wr16(REG_HSYNC1, 48);
wr16(REG_VCYCLE, 525);
wr16(REG_VOFFSET, 32);
wr16(REG_VSYNC0, 0);
wr16(REG_VSYNC1, 3);
wr8(REG_SWIZZLE, 0);
wr8(REG_PCLK_POL, 1);
wr8(REG_CSPREAD, 0);
wr16(REG_HSIZE, 480);
wr16(REG_VSIZE, 800);

//CMD_DLSTART;      //Set display list address to 0
   
    wr32(RAM_DL + 0, CLEAR_COLOR_RGB(0,0,0)); //CLEAR_COLOR_RGB0,0,0
    wr32(RAM_DL + 4, CLEAR(1,1,1));
    wr32(RAM_DL + 8, DISPLAY); //DISPLAY

    wr8(REG_DLSWAP,0x02);         //Send 0x02 because the programming guide says 10 (0x02) is recommended in most cases. Go to REG_DLSWAP for more info.
    wr8(REG_GPIO_DIR,0x80);
    wr8(REG_GPIO,0x80);
    wr8(REG_PCLK,5);

   
   
}

bool InitializeTrigger = true;               //To trigger initialization once in the beginning

void loop() {
  // put your main code here, to run repeatedly:


 
if( InitializeTrigger == true){

initialize();

InitializeTrigger = false;
}


    CMD_DLSTART;      //Set display list address to 0
   
    wr32(RAM_DL + 0, CLEAR_COLOR_RGB(0,0,255)); //CLEAR_COLOR_RGB0,0,0
    wr32(RAM_DL + 4, CLEAR(1,1,1));
    wr32(RAM_DL + 8, 0x00);
 
}