- 打卡等级：以坛为家I
- 打卡总天数：274
- 最近打卡：2026-07-21 08:44:27
 已绑定手机 超级版主
- 积分
- 3313
|
65-DMA-LCD12864-M6800接口，TFT320240-I8080接口，液晶屏测试，AI8051U实验箱演示程序
主程序main.C代码如下（汇编版本在附件中）：
/*---------------------------------------------------------------------*/
/* --- Web: www.STCAI.com ---------------------------------------------*/
/* --- BBS: www.STCAIMCU.com -----------------------------------------*/
/* 如果要在程序中使用此代码,请在程序中注明使用了STC的资料及程序 */
/*---------------------------------------------------------------------*/
/************* 功能说明 **************
LCM接口+DMA驱动液晶屏程序
8bit I8080模式, P2口接D8~D15
sbit LCD_RS = P4^5; //数据/命令切换
sbit LCD_WR = P3^6; //写控制
sbit LCD_RD = P3^7; //读控制
sbit LCD_CS = P0^5; //片选
sbit LCD_RESET = P4^7; //复位
LCM指令通过中断方式等待发送完成
DMA设置长度256字节，通过中断方式判断传输完成
下载时, 选择时钟 24MHz (用户可自行修改频率).
******************************************/
#include "..\..\comm\AI8051U.h"
#include "intrins.h"
#include <stdio.h>
#include "font.h"
#define MAIN_Fosc 24000000L //定义主时钟
typedef unsigned char u8;
typedef unsigned int u16;
typedef unsigned long u32;
sbit LCD_RS = P4^5; //数据/命令切换
sbit LCD_WR = P3^6; //写控制
sbit LCD_RD = P3^7; //读控制
sbit LCD_CS = P0^5; //片选
sbit LCD_RESET = P4^7; //复位
//IO连接
#define LCD_DataPort P2 //8位数据口
#define USR_LCM_IF 1 //1: use LCM Interface; 0: use IO mode
//支持横竖屏快速定义切换
#define USE_HORIZONTAL 0 //定义液晶屏显示方向 0-竖屏，1-横屏
#define LCMIFCR_OFFSET 0x90 //bit7:Enable interface, bit4:Write xram endian（修改16位数据存储在XRAM的顺序）
//画笔颜色
#define WHITE 0xFFFF
#define BLACK 0x0000
#define BLUE 0x001F
#define BRED 0XF81F
#define GRED 0XFFE0
#define GBLUE 0X07FF
#define RED 0xF800
#define MAGENTA 0xF81F
#define GREEN 0x07E0
#define CYAN 0x7FFF
#define YELLOW 0xFFE0
#define BROWN 0XBC40 //棕色
#define BRRED 0XFC07 //棕红色
#define GRAY 0X8430 //灰色
u16 LCD_W; //LCD 宽度
u16 LCD_H; //LCD 高度
u16 POINT_COLOR=0x0000; //画笔颜色
u16 index;
u16 xdata Buffer[8]={0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88};
u16 xdata Color[256];
bit DmaFlag;
bit LcmFlag;
void delay_ms(u16 ms);
void GPIO_Init(void);
void LCM_Config(void);
void DMA_Config(void);
void LCD_Init(void);
void Test_Color(void);
void LCD_WR_DATA_16Bit(u16 Data);
void LCD_SetWindows(u16 xStar, u16 yStar,u16 xEnd,u16 yEnd);
u16 LCD_Read_ID(void);
void Show_Str(u16 x, u16 y, u16 fc, u16 bc, u8 *str,u8 size,u8 mode);
void main(void)
{
WTST = 0; //设置程序指令延时参数，赋值为0可将CPU执行指令的速度设置为最快
EAXSFR(); //扩展寄存器(XFR)访问使能
CKCON = 0; //提高访问XRAM速度
P0M1 = 0x00; P0M0 = 0x00; //设置为准双向口
P1M1 = 0x00; P1M0 = 0x00; //设置为准双向口
P2M1 = 0x00; P2M0 = 0x00; //设置为准双向口
P3M1 = 0x00; P3M0 = 0x00; //设置为准双向口
P4M1 = 0x00; P4M0 = 0x00; //设置为准双向口
P5M1 = 0x00; P5M0 = 0x00; //设置为准双向口
P6M1 = 0x00; P6M0 = 0x00; //设置为准双向口
P7M1 = 0x00; P7M0 = 0x00; //设置为准双向口
GPIO_Init();
#if USR_LCM_IF == 1
LCM_Config();
DMA_Config();
EA = 1;
#endif
LCD_Init(); //LCM初始化
while(1)
{
Test_Color();
}
}
void LCD_Fill(u16 sx,u16 sy,u16 ex,u16 ey,u16 color)
{
u16 i,j;
u16 width=ex-sx+1; //得到填充的宽度
u16 height=ey-sy+1; //高度
LCD_SetWindows(sx,sy,ex,ey);//设置显示窗口
#if USR_LCM_IF == 1
for(j=0,i=0;i<256;i++)
{
Color = color;
}
index = 600;
LCD_CS=0;
DMA_LCM_CR = 0xa0; //Write dat
#else
for(i=0;i<height;i++)
{
for(j=0;j<width;j++)
LCD_WR_DATA_16Bit(color); //写入数据
}
#endif
}
//u16 LCD_Read_ID2(void)
//{
// u16 val;
// LCD_WR_REG(0x00); //ID: Status Read (RS)
// //LCM Read
// LCD_CS = 0;
// LCMIFCR |= 0x87; //Enable interface, Read data
// while(!LCD_CS);
// val = (LCMIFDATL << 8);
// LCD_CS = 0;
// LCMIFCR |= 0x87; //Enable interface, Read data
// while(!LCD_CS);
// val |= LCMIFDATL;
// return (val);
//}
void Test_Color(void)
{
u16 lcd_id;
u8 buf[10] = {0};
LCD_Fill(0,0,LCD_W,LCD_H,WHITE);
while(!LCD_CS);
DMA_LCM_AMT = 0x01; //Exe 2(n+1) bytes
lcd_id = LCD_Read_ID();
sprintf((char *)buf,"ID:0x%x",lcd_id);
Show_Str(50,25,BLUE,YELLOW,buf,16,1);
DMA_LCM_AMT = 0xff; //Exe 256(n+1) bytes
// lcd_id = LCD_Read_ID2();
// sprintf((char *)buf,"ID:0x%x",lcd_id);
// Show_Str(50,25,BLUE,YELLOW,buf,16,1);
delay_ms(800);
LCD_Fill(0,0,LCD_W,LCD_H,RED);
delay_ms(800);
LCD_Fill(0,0,LCD_W,LCD_H,GREEN);
delay_ms(800);
LCD_Fill(0,0,LCD_W,LCD_H,BLUE);
delay_ms(800);
}
//========================================================================
// 函数: void delay_ms(u16 ms)
// 描述: 延时函数。
// 参数: ms,要延时的ms数, 自动适应主时钟.
// 返回: none.
// 版本: VER1.0
// 日期: 2013-4-1
// 备注:
//========================================================================
void delay_ms(u16 ms)
{
u16 i;
do{
i = MAIN_Fosc / 6000;
while(--i); //6T per loop
}while(--ms);
}
void Write_Cmd(unsigned char DH,unsigned char DL)
{
#if USR_LCM_IF == 1
LCMIFDATL = DH;
LCD_CS = 0;
LcmFlag = 1;
LCMIFCR = LCMIFCR_OFFSET | 0x04; //write command out
while(LcmFlag);
LCMIFDATL = DL;
LcmFlag = 1;
LCMIFCR = LCMIFCR_OFFSET | 0x04; //write command out
while(LcmFlag);
LCD_CS = 1 ;
#else
LCD_CS=0;
LCD_RS=0;
LCD_WR=0;
LCD_DataPort=DH;
LCD_WR=1;
_nop_();
LCD_WR=0;
LCD_DataPort=DL;
LCD_WR=1;
LCD_CS=1;
#endif
}
void Write_Data(unsigned char DH,unsigned char DL)
{
#if USR_LCM_IF == 1
LCMIFDATL = DH;
LCD_CS = 0;
LcmFlag = 1;
LCMIFCR = LCMIFCR_OFFSET | 0x05; //write data out
while(LcmFlag);
LCMIFDATL = DL;
LcmFlag = 1;
LCMIFCR = LCMIFCR_OFFSET | 0x05; //write data out
while(LcmFlag);
LCD_CS = 1 ;
#else
LCD_CS=0;
LCD_RS=1;
LCD_WR=0;
LCD_DataPort=DH;
LCD_WR=1;
_nop_();
LCD_WR=0;
LCD_DataPort=DL;
LCD_WR=1;
LCD_CS=1;
#endif
}
void LCD_WR_REG(u8 Reg)
{
#if USR_LCM_IF == 1
LCMIFDATL = Reg;
LCD_CS = 0;
LcmFlag = 1;
LCMIFCR = LCMIFCR_OFFSET | 0x04; //write command out
while(LcmFlag);
LCD_CS = 1 ;
#else
LCD_RS=0;
LCD_CS=0;
LCD_WR=0;
LCD_DataPort = Reg;
LCD_WR=1;
LCD_CS=1;
#endif
}
u16 LCD_RD_DATA(void)
{
#if USR_LCM_IF == 1
//DMA Read
LCD_CS=0;
DmaFlag = 1;
DMA_LCM_CR = 0x88; //Read data
while(DmaFlag);
LCD_CS=1;
return (Buffer[0]);
#else
u16 d;
LCD_RS=1;
LCD_CS = 0;
LCD_RD = 0;
_nop_();
_nop_();
_nop_();
d = (LCD_DataPort << 8);
LCD_RD = 1;
_nop_();
_nop_();
_nop_();
LCD_RD = 0;
_nop_();
_nop_();
_nop_();
d |= LCD_DataPort;
LCD_RD = 1;
LCD_CS = 1;
return d;
#endif
}
void LCD_WR_REG16(u8 Reg, u16 dat)
{
Write_Cmd(0x00,Reg);
Write_Data((dat>>8)&0xFF,dat&0xFF);
}
void LCD_WR_DATA_16Bit(u16 Data)
{
Write_Data((Data>>8)&0xFF,Data&0xFF);
}
/*****************************************************************************
* @name :u16 LCD_Read_ID(void)
* @date :2020-12-11
* @function :Read ID
* @parameters :None
* @retvalue :ID value
******************************************************************************/
u16 LCD_Read_ID(void)
{
u16 val;
#if USR_LCM_IF == 1
LCD_WR_REG(0x00); //ID: Status Read (RS)
val = LCD_RD_DATA();
return (val);
#else
LCD_WR_REG(0x00); //ID: Status Read (RS)
LCD_DataPort = 0xFF; //拉高P0
//P0口设置成输入口
P2M0=0x00;
P2M1=0xFF;
val = LCD_RD_DATA();
//P0口设置成推挽输出
P2M0=0xFF;
P2M1=0x00;
LCD_DataPort = 0xFF; //拉高P0
return (val);
#endif
}
/*****************************************************************************
* @name :void GPIO_Init(void)
* @date :2018-11-13
* @function :Set the gpio to push-pull mode
* @parameters :None
* @retvalue :None
******************************************************************************/
void GPIO_Init(void)
{
//P0.5口设置成推挽输出
P0M0=0x20;
P0M1=0x00;
//P2口设置成准双向口
P2M0=0x00;
P2M1=0x00;
//P3.3口设置成输入口
//P3.7,P3.6,P3.4,P3.2口设置成推挽输出
P3M0=0xd4;
P3M1=0x08;
//P4.7,P4.5口设置成推挽输出
P4M0=0xa0;
P4M1=0x00;
//P5.3,P5.0口设置成输入口
//P5.2口设置成推挽输出
P5M0=0x04;
P5M1=0x09;
}
/*****************************************************************************
* @name :void LCM_Config(void)
* @date :2018-11-13
* @function :Config LCM
* @parameters :None
* @retvalue :None
******************************************************************************/
void LCM_Config(void)
{
LCMIFCFG = 0x80; //bit7 1:Enable Interrupt, bit1 0:8bit mode; bit0 0:8080,1:6800
LCMIFCFG2 = 0x29; //RS:P45,E:P37,RW:P36; Setup Time=2,HOLD Time=1
LCMIFSTA = 0x00;
}
/*****************************************************************************
* @name :void DMA_Config(void)
* @date :2020-12-09
* @function :Config DMA
* @parameters :None
* @retvalue :None
******************************************************************************/
void DMA_Config(void)
{
DMA_LCM_AMT = 0xff; //Exe 256(n+1) bytes
DMA_LCM_TXAH = (u8)((u16)&Color >> 8);
DMA_LCM_TXAL = (u8)((u16)&Color);
DMA_LCM_RXAH = (u8)((u16)&Buffer >> 8);
DMA_LCM_RXAL = (u8)((u16)&Buffer);
DMA_LCM_STA = 0x00;
DMA_LCM_CFG = 0x82;
DMA_LCM_CR = 0x00;
}
/*****************************************************************************
* @name :void LCDReset(void)
* @date :2018-08-09
* @function :Reset LCD screen
* @parameters :None
* @retvalue :None
******************************************************************************/
void LCDReset(void)
{
LCD_CS=1;
delay_ms(50);
LCD_RESET=0;
delay_ms(150);
LCD_RESET=1;
delay_ms(50);
}
/*****************************************************************************
* @name :void LCD_Init(void)
* @date :2018-08-09
* @function :Initialization LCD screen
* @parameters :None
* @retvalue :None
******************************************************************************/
void LCD_Init(void)
{
LCDReset(); //初始化之前复位
delay_ms(150); //根据不同晶振速度可以调整延时，保障稳定显示
//*************2.4inch ILI9325初始化**********//
LCD_WR_REG16(0x00E5,0x78F0);
LCD_WR_REG16(0x0001,0x0100);
LCD_WR_REG16(0x0002,0x0700);
LCD_WR_REG16(0x0003,0x1030);
LCD_WR_REG16(0x0004,0x0000);
LCD_WR_REG16(0x0008,0x0202);
LCD_WR_REG16(0x0009,0x0000);
LCD_WR_REG16(0x000A,0x0000);
LCD_WR_REG16(0x000C,0x0000);
LCD_WR_REG16(0x000D,0x0000);
LCD_WR_REG16(0x000F,0x0000);
//power on sequence VGHVGL
LCD_WR_REG16(0x0010,0x0000);
LCD_WR_REG16(0x0011,0x0007);
LCD_WR_REG16(0x0012,0x0000);
LCD_WR_REG16(0x0013,0x0000);
LCD_WR_REG16(0x0007,0x0000);
//vgh
LCD_WR_REG16(0x0010,0x1690);
LCD_WR_REG16(0x0011,0x0227);
delay_ms(10);
//vregiout
LCD_WR_REG16(0x0012,0x009D); //0x001b
delay_ms(10);
//vom amplitude
LCD_WR_REG16(0x0013,0x1900);
delay_ms(10);
//vom H
LCD_WR_REG16(0x0029,0x0025);
LCD_WR_REG16(0x002B,0x000D);
//gamma
LCD_WR_REG16(0x0030,0x0007);
LCD_WR_REG16(0x0031,0x0303);
LCD_WR_REG16(0x0032,0x0003); //0006
LCD_WR_REG16(0x0035,0x0206);
LCD_WR_REG16(0x0036,0x0008);
LCD_WR_REG16(0x0037,0x0406);
LCD_WR_REG16(0x0038,0x0304); //0200
LCD_WR_REG16(0x0039,0x0007);
LCD_WR_REG16(0x003C,0x0602); //0504
LCD_WR_REG16(0x003D,0x0008);
//ram
LCD_WR_REG16(0x0050,0x0000);
LCD_WR_REG16(0x0051,0x00EF);
LCD_WR_REG16(0x0052,0x0000);
LCD_WR_REG16(0x0053,0x013F);
LCD_WR_REG16(0x0060,0xA700);
LCD_WR_REG16(0x0061,0x0001);
LCD_WR_REG16(0x006A,0x0000);
//
LCD_WR_REG16(0x0080,0x0000);
LCD_WR_REG16(0x0081,0x0000);
LCD_WR_REG16(0x0082,0x0000);
LCD_WR_REG16(0x0083,0x0000);
LCD_WR_REG16(0x0084,0x0000);
LCD_WR_REG16(0x0085,0x0000);
//
LCD_WR_REG16(0x0090,0x0010);
LCD_WR_REG16(0x0092,0x0600);
LCD_WR_REG16(0x0007,0x0133);
LCD_WR_REG16(0x0000,0x0022);
//设置LCD属性参数
#if USE_HORIZONTAL==1
LCD_W = 320;
LCD_H = 240;
LCD_WR_REG16(0x0003, 0x1038); // set GRAM write direction and BGR=1.
LCD_WR_REG16(0x0001, 0x0000); // set SS and SM bit
#else
LCD_W = 240;
LCD_H = 320;
LCD_WR_REG16(0x0003, 0x1030); // set GRAM write direction and BGR=1.
LCD_WR_REG16(0x0001, 0x0100); // set SS and SM bit
#endif
}
#define WINDOW_XADDR_START 0x0050 // Horizontal Start Address Set
#define WINDOW_XADDR_END 0x0051 // Horizontal End Address Set
#define WINDOW_YADDR_START 0x0052 // Vertical Start Address Set
#define WINDOW_YADDR_END 0x0053 // Vertical End Address Set
#define GRAM_XADDR 0x0020 // GRAM Horizontal Address Set
#define GRAM_YADDR 0x0021 // GRAM Vertical Address Set
#define GRAMWR 0x0022 // memory write
void LCD_SetWindows(u16 xStar0, u16 yStar0,u16 xEnd0,u16 yEnd0)
{
u16 xStar; u16 yStar;u16 xEnd;u16 yEnd;
#if USE_HORIZONTAL==1
xStar = yStar0;
xEnd = yEnd0;
yStar = xStar0;
yEnd = xEnd0;
#else
xStar = xStar0;
xEnd = xEnd0;
yStar = yStar0;
yEnd = yEnd0;
#endif
LCD_WR_REG16(WINDOW_XADDR_START,xStar);
LCD_WR_REG16(WINDOW_XADDR_END,xEnd);
LCD_WR_REG16(WINDOW_YADDR_START,yStar);
LCD_WR_REG16(WINDOW_YADDR_END,yEnd);
LCD_WR_REG16(GRAM_XADDR,xStar);
LCD_WR_REG16(GRAM_YADDR,yStar);
LCD_WR_REG(GRAMWR);
}
/*****************************************************************************
* @name :void LCD_DrawPoint(u16 x,u16 y)
* @date :2018-08-09
* @function :Write a pixel data at a specified location
* @parameters :x:the x coordinate of the pixel
y:the y coordinate of the pixel
* @retvalue :None
******************************************************************************/
void LCD_DrawPoint(u16 x,u16 y)
{
LCD_SetWindows(x,y,x,y);//设置光标位置
LCD_WR_DATA_16Bit(POINT_COLOR);
}
/*****************************************************************************
* @name :void LCD_ShowChar(u16 x,u16 y,u16 fc, u16 bc, u8 num,u8 size,u8 mode)
* @date :2018-08-09
* @function :Display a single English character
* @parameters :x:the beginning x coordinate of the Character display position
y:the beginning y coordinate of the Character display position
fc:the color value of display character
bc:the background color of display character
num:the ascii code of display character(0~94)
size:the size of display character
mode:0-no overlying,1-overlying
* @retvalue :None
******************************************************************************/
void LCD_ShowChar(u16 x,u16 y,u16 fc, u16 bc, u8 num,u8 size,u8 mode)
{
u8 temp;
u8 pos,t;
u16 colortemp=POINT_COLOR;
num=num-' ';//得到偏移后的值
LCD_SetWindows(x,y,x+size/2-1,y+size-1);//设置单个文字显示窗口
if(!mode) //非叠加方式
{
for(pos=0;pos<size;pos++)
{
if(size==12)temp=asc2_1206[num][pos];//调用1206字体
else temp=asc2_1608[num][pos]; //调用1608字体
for(t=0;t<size/2;t++)
{
if(temp&0x01)LCD_WR_DATA_16Bit(fc);
else LCD_WR_DATA_16Bit(bc);
temp>>=1;
}
}
}
else//叠加方式
{
for(pos=0;pos<size;pos++)
{
if(size==12)temp=asc2_1206[num][pos];//调用1206字体
else temp=asc2_1608[num][pos]; //调用1608字体
for(t=0;t<size/2;t++)
{
POINT_COLOR=fc;
if(temp&0x01) LCD_DrawPoint(x+t,y+pos);//画一个点
temp>>=1;
}
}
}
POINT_COLOR=colortemp;
LCD_SetWindows(0,0,LCD_W-1,LCD_H-1);//恢复窗口为全屏
}
/*****************************************************************************
* @name :void Show_Str(u16 x, u16 y, u16 fc, u16 bc, u8 *str,u8 size,u8 mode)
* @date :2018-08-09
* @function :Display Chinese and English strings
* @parameters :x:the beginning x coordinate of the Chinese and English strings
y:the beginning y coordinate of the Chinese and English strings
fc:the color value of Chinese and English strings
bc:the background color of Chinese and English strings
str:the start address of the Chinese and English strings
size:the size of Chinese and English strings
mode:0-no overlying,1-overlying
* @retvalue :None
******************************************************************************/
void Show_Str(u16 x, u16 y, u16 fc, u16 bc, u8 *str,u8 size,u8 mode)
{
u16 x0=x;
u8 bHz=0; //字符或者中文
while(*str!=0)//数据未结束
{
if(!bHz)
{
if(x>(LCD_W-size/2)||y>(LCD_H-size))
return;
if(*str>0x80) bHz=1;//中文
else //字符
{
if(*str==0x0D)//换行符号
{
y+=size;
x=x0;
str++;
}
else
{
if(size>16)//字库中没有集成12X24 16X32的英文字体,用8X16代替
{
LCD_ShowChar(x,y,fc,bc,*str,16,mode);
x+=8; //字符,为全字的一半
}
else
{
LCD_ShowChar(x,y,fc,bc,*str,size,mode);
x+=size/2; //字符,为全字的一半
}
}
str++;
}
}
else//中文
{
// if(x>(lcddev.width-size)||y>(lcddev.height-size))
// return;
// bHz=0;//有汉字库
// if(size==32)
// GUI_DrawFont32(x,y,fc,bc,str,mode);
// else if(size==24)
// GUI_DrawFont24(x,y,fc,bc,str,mode);
// else
// GUI_DrawFont16(x,y,fc,bc,str,mode);
str+=2;
x+=size;//下一个汉字偏移
}
}
}
/*****************************************************************************
* @name :void LCM_Interrupt(void)
* @date :2018-11-13
* @function :None
* @parameters :None
* @retvalue :
******************************************************************************/
void LCMIF_DMA_Interrupt(void) interrupt 13
{
if(LCMIFSTA & 0x01)
{
LCMIFSTA = 0x00;
LcmFlag = 0;
}
if(DMA_LCM_STA & 0x01)
{
if(DmaFlag)
{
DmaFlag = 0;
DMA_LCM_CR = 0;
}
else
{
index--;
if(index == 0)
{
DMA_LCM_CR = 0;
LCD_CS=1;
}
else
{
DMA_LCM_CR = 0xa0; //Write dat
}
}
DMA_LCM_STA = 0;
}
}
65-DMA-LCD12864-M6800接口，TFT320240-I8080接口，液晶屏测试.zip
(56.01 KB, 下载次数: 0)
|
|
|手机版|深圳国芯人工智能有限公司
( 粤ICP备2022108929号-2 )
发表于 2026-7-2 11:28:44