TFT2.4寸顯示屏不顯示

ID:322939 · 發表于 2025-6-24 19:31

前幾天在淘寶上購了一塊TFT2.4寸顯示屏回來玩玩，驅動IC是ILI9341,賣家附有例程資料，按照例程資料弄個簡單的刷屏卻只有背光亮，其它啥也沒有，檢查了好幾遍沒解決，把我搞矇逼了，問了賣家說出廠檢查過沒問題，特在這向大佬請教下：

#include <AI8051U.H>
#include <intrins.h>
//#include "lcd.h"
#define uchar unsigned char
#define uint unsigned int
#define RED 0XF800
#define GREEN 0X07E0
#define BLUE 0X001F
#define WHITE 0XFFFF
sbit LCD_CS = P1^2; // 片選
sbit LCD_RESET = P1^6;
sbit LCD_MOSI = P3^1;
sbit LCD_DC =P1^3;// 數據/命令控制
sbit LCD_SCK = P3^0;// SPI時鐘
void Delay1ms() //@12.000MHz
{
unsigned char i, j;
i = 12;
j = 169;
do
{
while (--j);
} while (--i);
}
void delay_ms(unsigned int ms)
{
while(ms--)
{
Delay1ms();
}
}
// SPI延時（根據實際速度調整）
void SPI_Delay()
{
_nop_(); _nop_(); _nop_();
_nop_(); _nop_(); _nop_();
}
void SPI_RW(unsigned char byte)
{
unsigned char i;
for(i=0; i<8; i++)
{
LCD_SCK = 0;
if(byte & 0x80) LCD_MOSI = 1;
else LCD_MOSI = 0;
SPI_Delay();
LCD_SCK = 1;
byte <<= 1;
SPI_Delay() ;
}
}
void LCD_WR_REG(unsigned char reg)
{
LCD_DC = 1; // 命令模式
LCD_CS = 0; // 使能片選
SPI_RW(reg);
LCD_CS = 1; // 禁用片選
}
void LCD_WR_DATA(unsigned char val)
{
LCD_DC = 0; // 數據模式
LCD_CS = 0;
SPI_RW(val);
LCD_CS = 1;
}
void LCD_Init()
{
LCD_RESET=0;
delay_ms(10);
LCD_RESET=1;
delay_ms(120);
LCD_WR_REG(0xCF);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0xC1);
LCD_WR_DATA(0X30);
LCD_WR_REG(0xED);
LCD_WR_DATA(0x64);
LCD_WR_DATA(0x03);
LCD_WR_DATA(0X12);
LCD_WR_DATA(0X81);
LCD_WR_REG(0xE8);
LCD_WR_DATA(0x85);
LCD_WR_DATA(0x10);
LCD_WR_DATA(0x7A);
LCD_WR_REG(0xCB);
LCD_WR_DATA(0x39);
LCD_WR_DATA(0x2C);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x34);
LCD_WR_DATA(0x02);
LCD_WR_REG(0xF7);
LCD_WR_DATA(0x20);
LCD_WR_REG(0xEA);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x00);
LCD_WR_REG(0xC0); //Power control
LCD_WR_DATA(0x1B);//VRH[5:0]
LCD_WR_REG(0xC1);//Pwer control
LCD_WR_DATA(0x01);//SAP[2:0];BT[3:0]
LCD_WR_REG(0xC5); //VCM control
LCD_WR_DATA(0x30); //3F
LCD_WR_DATA(0x30); //3C
LCD_WR_REG(0xC7); //VCM control2
LCD_WR_DATA(0XB7);
LCD_WR_REG(0x36); // Memory Access Control
LCD_WR_DATA(0x48);
LCD_WR_REG(0x3A);
LCD_WR_DATA(0x55);
LCD_WR_REG(0xB1);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x1A);
LCD_WR_REG(0xB6); // Display Function Control
LCD_WR_DATA(0x0A);
LCD_WR_DATA(0xA2);
LCD_WR_REG(0xF2);// 3Gamma Function Disable
LCD_WR_DATA(0x00);
LCD_WR_REG(0x26); //Gamma curve selected
LCD_WR_DATA(0x01);
LCD_WR_REG(0xE0); //Set Gamma
LCD_WR_DATA(0x0F);
LCD_WR_DATA(0x2A);
LCD_WR_DATA(0x28);
LCD_WR_DATA(0x08);
LCD_WR_DATA(0x0E);
LCD_WR_DATA(0x08);
LCD_WR_DATA(0x54);
LCD_WR_DATA(0XA9);
LCD_WR_DATA(0x43);
LCD_WR_DATA(0x0A);
LCD_WR_DATA(0x0F);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x00);
LCD_WR_REG(0XE1); //Set Gamma
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x15);
LCD_WR_DATA(0x17);
LCD_WR_DATA(0x07);
LCD_WR_DATA(0x11);
LCD_WR_DATA(0x06);
LCD_WR_DATA(0x2B);
LCD_WR_DATA(0x56);
LCD_WR_DATA(0x3C);
LCD_WR_DATA(0x05);
LCD_WR_DATA(0x10);
LCD_WR_DATA(0x0F);
LCD_WR_DATA(0x3F);
LCD_WR_DATA(0x3F);
LCD_WR_DATA(0x0F);
LCD_WR_REG(0x2B);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x01);
LCD_WR_DATA(0x3f);
LCD_WR_REG(0x2A);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0xef);
LCD_WR_REG(0x11); //Exit Sleep
delay_ms(120);
LCD_WR_REG(0x29); //display on? ? ? ?
}
void LCD_SetArea(unsigned int stx,unsigned int sty,unsigned int endx,unsigned int endy)
{
LCD_WR_REG(0x2A);
LCD_WR_DATA(stx>>8);
LCD_WR_DATA(stx&0xff);
LCD_WR_DATA(endx>>8);
LCD_WR_DATA(endx&0xff);
LCD_WR_REG(0x2B);
LCD_WR_DATA(sty>>8);
LCD_WR_DATA(sty&0xff);
LCD_WR_DATA(endy>>8);
LCD_WR_DATA(endy&0xff);
}
void LCD_Clear(unsigned int color)
{
unsigned int i,j;
LCD_SetArea(0,0,239,319);
LCD_WR_REG(0x2C);
for(i=0;i<320;i++)
{
for(j=0;j<240;j++)
{
LCD_WR_DATA(color>>8);
LCD_WR_DATA(color);
}
}
}
void main()
{
P3M0=0xFF;
P3M1=0x00;
P1M0=0x00;
P1M1=0x00;
delay_ms(100);
LCD_Init();
while(1)
{
LCD_Clear(RED);
delay_ms(300);
LCD_Clear(WHITE);
delay_ms(300);
LCD_Clear(BLUE);
delay_ms(300);
LCD_Clear(GREEN);
delay_ms(300);
}
}