MCU驱动TFT彩屏刷屏数据40ms左右传完但刷屏用了300ms

只看该作者 · 2022-2-9 16:54

MCU使用SPI驱动TFT彩屏系统时钟33.1776MHz SPI频率FOSC/2 刷屏数据40ms左右传完了但屏幕实际刷新时间用了300ms以上 40ms是在刷屏程序里拉低引脚再拉高引脚然后用逻辑分析仪测出来的，刷屏时间的300ms是录屏后数帧数数出来的
请问下这个是哪里的问题，是TFT的初始化有问题吗

以下代码

#include<STC8A8K64D4.H>
#include "TFT.h"
#include "weather.h"
sbit BLK = P5^3; //背光控制
sbit RS = P0^5; //数据命令切换线
sbit RST = P0^6; //复位线
sbit CS = P0^7; //片选
sbit SCLK = P1^5; //SPI时钟线
sbit MOSI = P1^3; //SPI数据线
sbit LED = P5^0;
unsigned int time_i = 0;
void Timer0Init(void);
void UartInit(void);
bit Lcd_Clean = 0;
bit Lcd_color = 1;
void main()
{
Timer0Init();
UartInit();
LED = 1;
ET0 = 1;
EA = 1;
Lcd_Init();
while(1)
{
if(Lcd_Clean)
{
Lcd_Clean = 0;
if(Lcd_color)
{
Lcd_clear(0x8080);
Lcd_color = 0;
}
else
{
Lcd_clear(0xFFFF);
Lcd_color = 1;
}
}
}
}
void TM0_Isr() interrupt 1
{
time_i++;
if(time_i == 1000)
{
time_i = 0;
Lcd_Clean = 1;
}
}
void Timer0Init(void) //1毫秒@33.1776MHz
{
AUXR |= 0x80; //定时器时钟1T模式
TMOD &= 0xF0; //设置定时器模式
TL0 = 0x66; //设置定时初始值
TH0 = 0x7E; //设置定时初始值
TF0 = 0; //清除TF0标志
TR0 = 1; //定时器0开始计时
}
void UartInit(void) //115200bps@33.1776MHz
{
SCON = 0x50; //8位数据,可变波特率
AUXR |= 0x40; //定时器时钟1T模式
AUXR &= 0xFE; //串口1选择定时器1为波特率发生器
TMOD &= 0x0F; //设置定时器模式
TL1 = 0xB8; //设置定时初始值
TH1 = 0xFF; //设置定时初始值
ET1 = 0; //禁止定时器%d中断
TR1 = 1; //定时器1开始计时
}
void Delay500ms() //@12.000MHz
{
unsigned char i, j, k;
_nop_();
_nop_();
i = 23;
j = 205;
k = 120;
do
{
do
{
while (--k);
} while (--j);
} while (--i);
}
void SPI_Init() //初始化SPI SPI频率为FOSC/2
{
SPDAT = 0;
SPSTAT = 0xC0;
SPCTL = 0xDF;
}
void Lcd_Write_cmd(unsigned char cmd) //向TFT写入一个命令
{
CS = 0;
RS = 0;
SPDAT = cmd;
while(!(SPSTAT & 0x80));
SPSTAT = 0xC0;
CS = 1;
}
void Lcd_Write_data(unsigned char dat) //向TFT写入一个8位数据
{
CS = 0;
RS = 1;
SPDAT = dat;
while(!(SPSTAT & 0x80));
SPSTAT = 0xC0;
CS = 1;
}
void Lcd_Write_data_16bit(unsigned int dat) //向TFT写入一个16位数据
{
Lcd_Write_data(dat >> 8);
Lcd_Write_data(dat);
}
void Lcd_SetRegion(unsigned char x_start, unsigned char y_start, unsigned char x_end, unsigned char y_end) //选中一个区域
{
Lcd_Write_cmd(0x2A); //列地址设置
Lcd_Write_data(0);
Lcd_Write_data(x_start+2);
Lcd_Write_data(0);
Lcd_Write_data(x_end+2);
Lcd_Write_cmd(0x2B); //行地址设置
Lcd_Write_data(0);
Lcd_Write_data(y_start+3);
Lcd_Write_data(0);
Lcd_Write_data(y_end+3);
Lcd_Write_cmd(0x2C);
}
void Lcd_clear(unsigned int color) //清屏
{
unsigned int i;
LED = 0;
Lcd_SetRegion(0,0,127,127);
for(i=0;i<16384;i++)
{
Lcd_Write_data_16bit(color);
}
LED = 1;
}
void Lcd_Init() //初始化LCD
{
BLK = 0;
RST = 0;
Delay500ms();
RST = 1;
Delay500ms();
SPI_Init();
Delay500ms();
Lcd_Write_cmd(0x11); //退出休眠
Delay500ms();
Lcd_Write_cmd(0xB1); //设置正常刷新率
Lcd_Write_data(0x01);
Lcd_Write_data(0x2C);
Lcd_Write_data(0x2D);
Lcd_Write_cmd(0xB2); //设置空闲模式刷新率
Lcd_Write_data(0x01);
Lcd_Write_data(0x2C);
Lcd_Write_data(0x2D);
Lcd_Write_cmd(0xB3); //设置部分/全色的刷新率
Lcd_Write_data(0x01);
Lcd_Write_data(0x2C);
Lcd_Write_data(0x2D);
Lcd_Write_data(0x01);
Lcd_Write_data(0x2C);
Lcd_Write_data(0x2D);
Lcd_Write_cmd(0xB4); //显示反转模式控制
Lcd_Write_data(0x07);
Lcd_Write_cmd(0xC0); //电源控制1
Lcd_Write_data(0xA2);
Lcd_Write_data(0x02);
Lcd_Write_data(0x84);
Lcd_Write_cmd(0xC1); //电源控制2
Lcd_Write_data(0xC5);
Lcd_Write_cmd(0xC2); //电源控制3
Lcd_Write_data(0x0A);
Lcd_Write_data(0x00);
Lcd_Write_cmd(0xC3); //电源控制4
Lcd_Write_data(0x8A);
Lcd_Write_data(0x2A);
Lcd_Write_cmd(0xC4); //电源控制5
Lcd_Write_data(0x8A);
Lcd_Write_data(0xEE);
Lcd_Write_cmd(0xC5); //VCOM控制1
Lcd_Write_data(0x0E);
Lcd_Write_cmd(0x36); //内存数据访问控制
Lcd_Write_data(0xC8);
//Lcd_Write_cmd(0x21);
Lcd_Write_cmd(0xE0);
Lcd_Write_data(0x0F);
Lcd_Write_data(0x1A);
Lcd_Write_data(0x0F);
Lcd_Write_data(0x18);
Lcd_Write_data(0x2F);
Lcd_Write_data(0x28);
Lcd_Write_data(0x20);
Lcd_Write_data(0x22);
Lcd_Write_data(0x1F);
Lcd_Write_data(0x1B);
Lcd_Write_data(0x23);
Lcd_Write_data(0x37);
Lcd_Write_data(0x00);
Lcd_Write_data(0x07);
Lcd_Write_data(0x02);
Lcd_Write_data(0x10);
Lcd_Write_cmd(0xE1);
Lcd_Write_data(0x0F);
Lcd_Write_data(0x1B);
Lcd_Write_data(0x0F);
Lcd_Write_data(0x17);
Lcd_Write_data(0x33);
Lcd_Write_data(0x2C);
Lcd_Write_data(0x29);
Lcd_Write_data(0x2E);
Lcd_Write_data(0x30);
Lcd_Write_data(0x30);
Lcd_Write_data(0x39);
Lcd_Write_data(0x3F);
Lcd_Write_data(0x00);
Lcd_Write_data(0x07);
Lcd_Write_data(0x03);
Lcd_Write_data(0x10);
Lcd_Write_cmd(0xF0); //启动测试命令
Lcd_Write_data(0x01);
Lcd_Write_cmd(0xF6); //禁用ram省电模式
Lcd_Write_data(0x00);
Lcd_Write_cmd(0x3A); //65k mode
Lcd_Write_data(0x05);
Lcd_Write_cmd(0x29); //开启显示
// Lcd_SetRegion(0,0,127,127); //选中整个屏幕
Lcd_clear(0x0000); //清屏(青色)
BLK = 1;
}

只看该作者 · 2022-2-9 16:55

1万 · 2022-2-9 17:04

SPI接口的彩屏不适合整屏刷新！刷新速度太慢！

只看该作者 · 2022-2-10 12:37

数据传完不代表刷屏结束吧

只看该作者 · 2022-2-10 19:41

可以在程序里面限制一下，刷一次屏后等等待一段时间，可能看到的是现象不对

只看该作者 · 2022-2-10 21:32

bbc960 发表于 2022-2-10 19:41
可以在程序里面限制一下，刷一次屏后等等待一段时间，可能看到的是现象不对 ...

程序里已经规定好了1秒给屏换一次色

只看该作者 · 2022-2-10 21:33

海洋无限发表于 2022-2-10 12:37
数据传完不代表刷屏结束吧

看屏的数据手册的话，初始化的帧数是80fps左右，达到这个帧数的话无论怎样都不会达到300ms的刷屏时间吧？

只看该作者 · 2022-2-11 14:59

华芯微特32位MCU
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