【STM32学习记录4】1.44寸TFT液晶屏显示字符、汉字和图片
Author：AXYZdong
自动化专业 工科男
有一点思考，有一点想法，有一点理性
文章目录
- 概述
- 4.1硬件设计
- 4.2软件设计
- 4.2.1编程要点
- 4.2.2代码说明
- 1、宏定义Lcd_Driver.h
- 2、TFT驱动文件Lcd_Driver.c
- 3、延时函数文件delay.c
- 4、图像显示驱动文件GUI.c
- 5、TFT显示图像文件QDTFT_demo.c
- 6、主函数main.c
概述
MCU:某宝的STM32F407VET6最小系统板，点此详见
外部资源：某宝的TFT液晶屏（下面会附上图片）
点此下载完整工程
文末有惊喜，希望可以坚持看下去
4.1硬件设计
| Pin | 引脚说明 |
|---|---|
| VCC | 电源正 |
| GND | 电源负 |
| NC | no connect ，不需要接线 |
| LED | 背光控制信号 |
| CLK（SCL） | SPI总线时钟引脚 |
| SDI（SDA） | SPI总线数据引脚 |
| RS | 寄存器/数据选择控制引脚 |
| RST | 复位控制引脚 |
| CS | 片选控制引脚 |
这里有个小疑问：为啥引出两个GND和NC？不知道制造商怎么想的？有知道的小伙伴可以私信我呢。
要注意一下，NC这个引脚是不需要接线的。
LED：背光控制信号，如果不需要控制时，接电源+3.3V
关键词：SPI总线驱动
4.2软件设计
4.2.1编程要点
1、初始化GPIO口来模拟SPI，每个人设置的GPIO口不同，开发板与TFT接线也会不同。之后再设置液晶屏初始化。
2、TFT驱动程序，这里的驱动程序可以参考别人写的，然后自己再加以修改或者补充。驱动程序包括：向TFT写数据，设置TFT显示区域、设置TFT某点的颜色等等，具体的在代码里注释说明。
3、取模，包括文字取模和图片取模。根据自己的需要来取模。需要取模软件的可以私信我。
（PS：其实这几个步骤和上一篇文章的OLED差不多的啦，只是修(fu)改(zhi)了一下）
4.2.2代码说明
1、宏定义Lcd_Driver.h
#define RED 0xf800
#define GREEN 0x07e0
#define BLUE 0x001f
#define WHITE 0xffff
#define BLACK 0x0000
#define YELLOW 0xFFE0
#define GRAY0 0xEF7D //灰色0 3165 00110 001011 00101
#define GRAY1 0x8410 //灰色1 00000 000000 00000
#define GRAY2 0x4208 //灰色2 1111111111011111
#define LCD_CTRL GPIOB //定义TFT数据端口
#define LCD_LED GPIO_Pin_9 //MCU_PB9--->>TFT --BL
#define LCD_SCL GPIO_Pin_10 //PB13--->>TFT --SCL/SCK
#define LCD_SDA GPIO_Pin_12 //PB15 MOSI--->>TFT --SDA/DIN
#define LCD_RS GPIO_Pin_11 //PB11--->>TFT --RS/DC
#define LCD_RST GPIO_Pin_14 //PB10--->>TFT --RST
#define LCD_CS GPIO_Pin_13 //MCU_PB11--->>TFT --CS/CE
//#define LCD_CS_SET(x) LCD_CTRL->ODR=(LCD_CTRL->ODR&~LCD_CS)|(x ? LCD_CS:0)
//液晶控制口置1操作语句宏定义
#define LCD_CS_SET LCD_CTRL->BSRRL=LCD_CS
#define LCD_RS_SET LCD_CTRL->BSRRL=LCD_RS
#define LCD_SDA_SET LCD_CTRL->BSRRL=LCD_SDA
#define LCD_SCL_SET LCD_CTRL->BSRRL=LCD_SCL
#define LCD_RST_SET LCD_CTRL->BSRRL=LCD_RST
#define LCD_LED_SET LCD_CTRL->BSRRL=LCD_LED
//液晶控制口置0操作语句宏定义
#define LCD_CS_CLR LCD_CTRL->BSRRH=LCD_CS
#define LCD_RS_CLR LCD_CTRL->BSRRH=LCD_RS
#define LCD_SDA_CLR LCD_CTRL->BSRRH=LCD_SDA
#define LCD_SCL_CLR LCD_CTRL->BSRRH=LCD_SCL
#define LCD_RST_CLR LCD_CTRL->BSRRH=LCD_RST
#define LCD_LED_CLR LCD_CTRL->BSRRH=LCD_LED
#define LCD_DATAOUT(x) LCD_DATA->ODR=x; //数据输出
#define LCD_DATAIN LCD_DATA->IDR; //数据输入
#define LCD_WR_DATA(data){\
LCD_RS_SET;\
LCD_CS_CLR;\
LCD_DATAOUT(data);\
LCD_WR_CLR;\
LCD_WR_SET;\
LCD_CS_SET;\
}
void LCD_GPIO_Init(void);
void Lcd_WriteIndex(u8 Index);
void Lcd_WriteData(u8 Data);
void Lcd_WriteReg(u8 Index,u8 Data);
u16 Lcd_ReadReg(u8 LCD_Reg);
void Lcd_Reset(void);
void Lcd_Init(void);
void Lcd_Clear(u16 Color);
void Lcd_SetXY(u16 x,u16 y);
void Gui_DrawPoint(u16 x,u16 y,u16 Data);
unsigned int Lcd_ReadPoint(u16 x,u16 y);
void Lcd_SetRegion(u16 x_start,u16 y_start,u16 x_end,u16 y_end);
void LCD_WriteData_16Bit(u16 Data);
2、TFT驱动文件Lcd_Driver.c
#include "stm32f4xx.h"
#include "Lcd_Driver.h"
#include "LCD_Config.h"
#include "delay.h"
//本程序使用的是模拟SPI接口驱动
//可自由更改接口IO配置，使用任意最少4 IO即可完成液晶驱动显示
接口定义在Lcd_Driver.h内定义，请根据接线修改并修改相应IO初始化LCD_GPIO_Init()
#define LCD_CTRL GPIOB //定义TFT数据端口
#define LCD_LED GPIO_Pin_9 //PB9--->>TFT --BL
#define LCD_RS GPIO_Pin_10 //PB11--->>TFT --RS/DC
#define LCD_CS GPIO_Pin_11 //PB11--->>TFT --CS/CE
#define LCD_RST GPIO_Pin_12 //PB10--->>TFT --RST
#define LCD_SCL GPIO_Pin_13 //PB13--->>TFT --SCL/SCK
#define LCD_SDA GPIO_Pin_15 //PB15 MOSI--->>TFT --SDA/DIN
*******************************************************************************/
//液晶IO初始化配置
void LCD_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB ,ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9| GPIO_Pin_10| GPIO_Pin_11| GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14| GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
//向SPI总线传输一个8位数据
void SPI_WriteData(u8 Data)
{
unsigned char i=0;
for(i=8;i>0;i--)
{
if(Data&0x80)
LCD_SDA_SET; //输出数据
else LCD_SDA_CLR;
LCD_SCL_CLR;
LCD_SCL_SET;
Data<<=1;
}
}
//向液晶屏写一个8位指令
void Lcd_WriteIndex(u8 Index)
{
//SPI 写命令时序开始
LCD_CS_CLR;
LCD_RS_CLR;
SPI_WriteData(Index);
LCD_CS_SET;
}
//向液晶屏写一个8位数据
void Lcd_WriteData(u8 Data)
{
LCD_CS_CLR;
LCD_RS_SET;
SPI_WriteData(Data);
LCD_CS_SET;
}
//向液晶屏写一个16位数据
void LCD_WriteData_16Bit(u16 Data)
{
LCD_CS_CLR;
LCD_RS_SET;
SPI_WriteData(Data>>8); //写入高8位数据
SPI_WriteData(Data); //写入低8位数据
LCD_CS_SET;
}
void Lcd_WriteReg(u8 Index,u8 Data)
{
Lcd_WriteIndex(Index);
Lcd_WriteData(Data);
}
void Lcd_Reset(void)
{
LCD_RST_CLR;
delay_ms(100);
LCD_RST_SET;
delay_ms(50);
}
//LCD Init For 1.44Inch LCD Panel with ST7735R.
void Lcd_Init(void)
{
LCD_GPIO_Init();
Lcd_Reset(); //Reset before LCD Init.
//LCD Init For 1.44Inch LCD Panel with ST7735R.
Lcd_WriteIndex(0x11);//Sleep exit
delay_ms (120);
//ST7735R Frame Rate
Lcd_WriteIndex(0xB1);
Lcd_WriteData(0x01);
Lcd_WriteData(0x2C);
Lcd_WriteData(0x2D);
Lcd_WriteIndex(0xB2);
Lcd_WriteData(0x01);
Lcd_WriteData(0x2C);
Lcd_WriteData(0x2D);
Lcd_WriteIndex(0xB3);
Lcd_WriteData(0x01);
Lcd_WriteData(0x2C);
Lcd_WriteData(0x2D);
Lcd_WriteData(0x01);
Lcd_WriteData(0x2C);
Lcd_WriteData(0x2D);
Lcd_WriteIndex(0xB4); //Column inversion
Lcd_WriteData(0x07);
//ST7735R Power Sequence
Lcd_WriteIndex(0xC0);
Lcd_WriteData(0xA2);
Lcd_WriteData(0x02);
Lcd_WriteData(0x84);
Lcd_WriteIndex(0xC1);
Lcd_WriteData(0xC5);
Lcd_WriteIndex(0xC2);
Lcd_WriteData(0x0A);
Lcd_WriteData(0x00);
Lcd_WriteIndex(0xC3);
Lcd_WriteData(0x8A);
Lcd_WriteData(0x2A);
Lcd_WriteIndex(0xC4);
Lcd_WriteData(0x8A);
Lcd_WriteData(0xEE);
Lcd_WriteIndex(0xC5); //VCOM
Lcd_WriteData(0x0E);
Lcd_WriteIndex(0x36); //MX, MY, RGB mode
Lcd_WriteData(0xC8);
//ST7735R Gamma Sequence
Lcd_WriteIndex(0xe0);
Lcd_WriteData(0x0f);
Lcd_WriteData(0x1a);
Lcd_WriteData(0x0f);
Lcd_WriteData(0x18);
Lcd_WriteData(0x2f);
Lcd_WriteData(0x28);
Lcd_WriteData(0x20);
Lcd_WriteData(0x22);
Lcd_WriteData(0x1f);
Lcd_WriteData(0x1b);
Lcd_WriteData(0x23);
Lcd_WriteData(0x37);
Lcd_WriteData(0x00);
Lcd_WriteData(0x07);
Lcd_WriteData(0x02);
Lcd_WriteData(0x10);
Lcd_WriteIndex(0xe1);
Lcd_WriteData(0x0f);
Lcd_WriteData(0x1b);
Lcd_WriteData(0x0f);
Lcd_WriteData(0x17);
Lcd_WriteData(0x33);
Lcd_WriteData(0x2c);
Lcd_WriteData(0x29);
Lcd_WriteData(0x2e);
Lcd_WriteData(0x30);
Lcd_WriteData(0x30);
Lcd_WriteData(0x39);
Lcd_WriteData(0x3f);
Lcd_WriteData(0x00);
Lcd_WriteData(0x07);
Lcd_WriteData(0x03);
Lcd_WriteData(0x10);
Lcd_WriteIndex(0x2a);
Lcd_WriteData(0x00);
Lcd_WriteData(0x00);
Lcd_WriteData(0x00);
Lcd_WriteData(0x7f);
Lcd_WriteIndex(0x2b);
Lcd_WriteData(0x00);
Lcd_WriteData(0x00);
Lcd_WriteData(0x00);
Lcd_WriteData(0x9f);
Lcd_WriteIndex(0xF0); //Enable test command
Lcd_WriteData(0x01);
Lcd_WriteIndex(0xF6); //Disable ram power save mode
Lcd_WriteData(0x00);
Lcd_WriteIndex(0x3A); //65k mode
Lcd_WriteData(0x05);
Lcd_WriteIndex(0x29);//Display on
}
/*************************************************
函数名：LCD_Set_Region
功能：设置lcd显示区域，在此区域写点数据自动换行
入口参数：xy起点和终点
返回值：无
*************************************************/
void Lcd_SetRegion(u16 x_start,u16 y_start,u16 x_end,u16 y_end)
{
Lcd_WriteIndex(0x2a);
Lcd_WriteData(0x00);
Lcd_WriteData(x_start+2);
Lcd_WriteData(0x00);
Lcd_WriteData(x_end+2);
Lcd_WriteIndex(0x2b);
Lcd_WriteData(0x00);
Lcd_WriteData(y_start+3);
Lcd_WriteData(0x00);
Lcd_WriteData(y_end+3);
Lcd_WriteIndex(0x2c);
}
/*************************************************
函数名：LCD_Set_XY
功能：设置lcd显示起始点
入口参数：xy坐标
返回值：无
*************************************************/
void Lcd_SetXY(u16 x,u16 y)
{
Lcd_SetRegion(x,y,x,y);
}
/*************************************************
函数名：LCD_DrawPoint
功能：画一个点
入口参数：无
返回值：无
*************************************************/
void Gui_DrawPoint(u16 x,u16 y,u16 Data)
{
Lcd_SetRegion(x,y,x+1,y+1);
LCD_WriteData_16Bit(Data);
}
/*****************************************
函数功能：读TFT某一点的颜色
出口参数：color 点颜色值
******************************************/
unsigned int Lcd_ReadPoint(u16 x,u16 y)
{
unsigned int Data;
Lcd_SetXY(x,y);
//Lcd_ReadData();//丢掉无用字节
//Data=Lcd_ReadData();
Lcd_WriteData(Data);
return Data;
}
/*************************************************
函数名：Lcd_Clear
功能：全屏清屏函数
入口参数：填充颜色COLOR
返回值：无
*************************************************/
void Lcd_Clear(u16 Color)
{
unsigned int i,m;
Lcd_SetRegion(0,0,X_MAX_PIXEL-1,Y_MAX_PIXEL-1);
Lcd_WriteIndex(0x2C);
for(i=0;i<X_MAX_PIXEL;i++)
for(m=0;m<Y_MAX_PIXEL;m++)
{
LCD_WriteData_16Bit(Color);
}
}
3、延时函数文件delay.c
#include "stm32f4xx.h"
#include "delay.h"
static u8 fac_us=0;//us延时倍乘数
static u16 fac_ms=0;//ms延时倍乘数
//初始化延迟函数
//SYSTICK的时钟固定为HCLK时钟的1/8
//SYSCLK:系统时钟
void delay_init(u8 SYSCLK)
{
SysTick->CTRL&=0xfffffffb;//bit2清空,选择外部时钟 HCLK/8
fac_us=SYSCLK/8;
fac_ms=(u16)fac_us*1000;
}
//延时nms
//注意nms的范围
//SysTick->LOAD为24位寄存器,所以,最大延时为:
//nms<=0xffffff*8*1000/SYSCLK
//SYSCLK单位为Hz,nms单位为ms
//对72M条件下,nms<=1864
void delay_ms(u16 nms)
{
u32 temp;
SysTick->LOAD=(u32)nms*fac_ms;//时间加载(SysTick->LOAD为24bit)
SysTick->VAL =0x00; //清空计数器
SysTick->CTRL=0x01 ; //开始倒数
do
{
temp=SysTick->CTRL;
}
while(temp&0x01&&!(temp&(1<<16)));//等待时间到达
SysTick->CTRL=0x00; //关闭计数器
SysTick->VAL =0X00; //清空计数器
}
//延时nus
//nus为要延时的us数.
void delay_us(u32 nus)
{
u32 temp;
SysTick->LOAD=nus*fac_us; //时间加载
SysTick->VAL=0x00; //清空计数器
SysTick->CTRL=0x01 ; //开始倒数
do
{
temp=SysTick->CTRL;
}
while(temp&0x01&&!(temp&(1<<16)));//等待时间到达
SysTick->CTRL=0x00; //关闭计数器
SysTick->VAL =0X00; //清空计数器
}
4、图像显示驱动文件GUI.c
#include "stm32f4xx.h"
#include "Lcd_Driver.h"
#include "GUI.h"
#include "delay.h"
#include "font.h"
//从ILI93xx读出的数据为GBR格式，而我们写入的时候为RGB格式。
//通过该函数转换
//c:GBR格式的颜色值
//返回值：RGB格式的颜色值
u16 LCD_BGR2RGB(u16 c)
{
u16 r,g,b,rgb;
b=(c>>0)&0x1f;
g=(c>>5)&0x3f;
r=(c>>11)&0x1f;
rgb=(b<<11)+(g<<5)+(r<<0);
return(rgb);
}
void Gui_Circle(u16 X,u16 Y,u16 R,u16 fc)
{//Bresenham算法
unsigned short a,b;
int c;
a=0;
b=R;
c=3-2*R;
while (a<b)
{
Gui_DrawPoint(X+a,Y+b,fc); // 7
Gui_DrawPoint(X-a,Y+b,fc); // 6
Gui_DrawPoint(X+a,Y-b,fc); // 2
Gui_DrawPoint(X-a,Y-b,fc); // 3
Gui_DrawPoint(X+b,Y+a,fc); // 8
Gui_DrawPoint(X-b,Y+a,fc); // 5
Gui_DrawPoint(X+b,Y-a,fc); // 1
Gui_DrawPoint(X-b,Y-a,fc); // 4
if(c<0) c=c+4*a+6;
else
{
c=c+4*(a-b)+10;
b-=1;
}
a+=1;
}
if (a==b)
{
Gui_DrawPoint(X+a,Y+b,fc);
Gui_DrawPoint(X+a,Y+b,fc);
Gui_DrawPoint(X+a,Y-b,fc);
Gui_DrawPoint(X-a,Y-b,fc);
Gui_DrawPoint(X+b,Y+a,fc);
Gui_DrawPoint(X-b,Y+a,fc);
Gui_DrawPoint(X+b,Y-a,fc);
Gui_DrawPoint(X-b,Y-a,fc);
}
}
//画线函数，使用Bresenham 画线算法
void Gui_DrawLine(u16 x0, u16 y0,u16 x1, u16 y1,u16 Color)
{
int dx, // difference in x's
dy, // difference in y's
dx2, // dx,dy * 2
dy2,
x_inc, // amount in pixel space to move during drawing
y_inc, // amount in pixel space to move during drawing
error, // the discriminant i.e. error i.e. decision variable
index; // used for looping
Lcd_SetXY(x0,y0);
dx = x1-x0;//计算x距离
dy = y1-y0;//计算y距离
if (dx>=0)
{
x_inc = 1;
}
else
{
x_inc = -1;
dx = -dx;
}
if (dy>=0)
{
y_inc = 1;
}
else
{
y_inc = -1;
dy = -dy;
}
dx2 = dx << 1;
dy2 = dy << 1;
if (dx > dy)//x距离大于y距离，那么每个x轴上只有一个点，每个y轴上有若干个点
{//且线的点数等于x距离，以x轴递增画点
// initialize error term
error = dy2 - dx;
// draw the line
for (index=0; index <= dx; index++)//要画的点数不会超过x距离
{
//画点
Gui_DrawPoint(x0,y0,Color);
// test if error has overflowed
if (error >= 0) //是否需要增加y坐标值
{
error-=dx2;
// move to next line
y0+=y_inc;//增加y坐标值
} // end if error overflowed
// adjust the error term
error+=dy2;
// move to the next pixel
x0+=x_inc;//x坐标值每次画点后都递增1
} // end for
} // end if |slope| <= 1
else//y轴大于x轴，则每个y轴上只有一个点，x轴若干个点
{//以y轴为递增画点
// initialize error term
error = dx2 - dy;
// draw the line
for (index=0; index <= dy; index++)
{
// set the pixel
Gui_DrawPoint(x0,y0,Color);
// test if error overflowed
if (error >= 0)
{
error-=dy2;
// move to next line
x0+=x_inc;
} // end if error overflowed
// adjust the error term
error+=dx2;
// move to the next pixel
y0+=y_inc;
} // end for
} // end else |slope| > 1
}
void Gui_box(u16 x, u16 y, u16 w, u16 h,u16 bc)
{
Gui_DrawLine(x,y,x+w,y,0xEF7D);
Gui_DrawLine(x+w-1,y+1,x+w-1,y+1+h,0x2965);
Gui_DrawLine(x,y+h,x+w,y+h,0x2965);
Gui_DrawLine(x,y,x,y+h,0xEF7D);
Gui_DrawLine(x+1,y+1,x+1+w-2,y+1+h-2,bc);
}
void Gui_box2(u16 x,u16 y,u16 w,u16 h, u8 mode)
{
if (mode==0) {
Gui_DrawLine(x,y,x+w,y,0xEF7D);
Gui_DrawLine(x+w-1,y+1,x+w-1,y+1+h,0x2965);
Gui_DrawLine(x,y+h,x+w,y+h,0x2965);
Gui_DrawLine(x,y,x,y+h,0xEF7D);
}
if (mode==1) {
Gui_DrawLine(x,y,x+w,y,0x2965);
Gui_DrawLine(x+w-1,y+1,x+w-1,y+1+h,0xEF7D);
Gui_DrawLine(x,y+h,x+w,y+h,0xEF7D);
Gui_DrawLine(x,y,x,y+h,0x2965);
}
if (mode==2) {
Gui_DrawLine(x,y,x+w,y,0xffff);
Gui_DrawLine(x+w-1,y+1,x+w-1,y+1+h,0xffff);
Gui_DrawLine(x,y+h,x+w,y+h,0xffff);
Gui_DrawLine(x,y,x,y+h,0xffff);
}
}
/**************************************************************************************
功能描述: 在屏幕显示一凸起的按钮框
输 入: u16 x1,y1,x2,y2 按钮框左上角和右下角坐标
输 出: 无
**************************************************************************************/
void DisplayButtonDown(u16 x1,u16 y1,u16 x2,u16 y2)
{
Gui_DrawLine(x1, y1, x2,y1, GRAY2); //H
Gui_DrawLine(x1+1,y1+1,x2,y1+1, GRAY1); //H
Gui_DrawLine(x1, y1, x1,y2, GRAY2); //V
Gui_DrawLine(x1+1,y1+1,x1+1,y2, GRAY1); //V
Gui_DrawLine(x1, y2, x2,y2, WHITE); //H
Gui_DrawLine(x2, y1, x2,y2, WHITE); //V
}
/**************************************************************************************
功能描述: 在屏幕显示一凹下的按钮框
输 入: u16 x1,y1,x2,y2 按钮框左上角和右下角坐标
输 出: 无
**************************************************************************************/
void DisplayButtonUp(u16 x1,u16 y1,u16 x2,u16 y2)
{
Gui_DrawLine(x1, y1, x2,y1, WHITE); //H
Gui_DrawLine(x1, y1, x1,y2, WHITE); //V
Gui_DrawLine(x1+1,y2-1,x2,y2-1, GRAY1); //H
Gui_DrawLine(x1, y2, x2,y2, GRAY2); //H
Gui_DrawLine(x2-1,y1+1,x2-1,y2, GRAY1); //V
Gui_DrawLine(x2 ,y1 ,x2,y2, GRAY2); //V
}
void Gui_DrawFont_GBK16(u16 x, u16 y, u16 fc, u16 bc, u8 *s)
{
unsigned char i,j;
unsigned short k,x0;
x0=x;
while(*s)
{
if((*s) < 128)
{
k=*s;
if (k==13)
{
x=x0;
y+=16;
}
else
{
if (k>32) k-=32; else k=0;
for(i=0;i<16;i++)
for(j=0;j<8;j++)
{
if(asc16[k*16+i]&(0x80>>j)) Gui_DrawPoint(x+j,y+i,fc);
else
{
if (fc!=bc) Gui_DrawPoint(x+j,y+i,bc);
}
}
x+=8;
}
s++;
}
else
{
for (k=0;k<hz16_num;k++)
{
if ((hz16[k].Index[0]==*(s))&&(hz16[k].Index[1]==*(s+1)))
{
for(i=0;i<16;i++)
{
for(j=0;j<8;j++)
{
if(hz16[k].Msk[i*2]&(0x80>>j)) Gui_DrawPoint(x+j,y+i,fc);
else {
if (fc!=bc) Gui_DrawPoint(x+j,y+i,bc);
}
}
for(j=0;j<8;j++)
{
if(hz16[k].Msk[i*2+1]&(0x80>>j)) Gui_DrawPoint(x+j+8,y+i,fc);
else
{
if (fc!=bc) Gui_DrawPoint(x+j+8,y+i,bc);
}
}
}
}
}
s+=2;x+=16;
}
}
}
void Gui_DrawFont_GBK24(u16 x, u16 y, u16 fc, u16 bc, u8 *s)
{
unsigned char i,j;
unsigned short k;
while(*s)
{
if( *s < 0x80 )
{
k=*s;
if (k>32) k-=32; else k=0;
for(i=0;i<16;i++)
for(j=0;j<8;j++)
{
if(asc16[k*16+i]&(0x80>>j))
Gui_DrawPoint(x+j,y+i,fc);
else
{
if (fc!=bc) Gui_DrawPoint(x+j,y+i,bc);
}
}
s++;x+=8;
}
else
{
for (k=0;k<hz24_num;k++)
{
if ((hz24[k].Index[0]==*(s))&&(hz24[k].Index[1]==*(s+1)))
{
for(i=0;i<24;i++)
{
for(j=0;j<8;j++)
{
if(hz24[k].Msk[i*3]&(0x80>>j))
Gui_DrawPoint(x+j,y+i,fc);
else
{
if (fc!=bc) Gui_DrawPoint(x+j,y+i,bc);
}
}
for(j=0;j<8;j++)
{
if(hz24[k].Msk[i*3+1]&(0x80>>j)) Gui_DrawPoint(x+j+8,y+i,fc);
else {
if (fc!=bc) Gui_DrawPoint(x+j+8,y+i,bc);
}
}
for(j=0;j<8;j++)
{
if(hz24[k].Msk[i*3+2]&(0x80>>j))
Gui_DrawPoint(x+j+16,y+i,fc);
else
{
if (fc!=bc) Gui_DrawPoint(x+j+16,y+i,bc);
}
}
}
}
}
s+=2;x+=24;
}
}
}
void Gui_DrawFont_Num32(u16 x, u16 y, u16 fc, u16 bc, u16 num)
{
unsigned char i,j,k,c;
//lcd_text_any(x+94+i*42,y+34,32,32,0x7E8,0x0,sz32,knum[i]);
// w=w/8;
for(i=0;i<32;i++)
{
for(j=0;j<4;j++)
{
c=*(sz32+num*32*4+i*4+j);
for (k=0;k<8;k++)
{
if(c&(0x80>>k)) Gui_DrawPoint(x+j*8+k,y+i,fc);
else {
if (fc!=bc) Gui_DrawPoint(x+j*8+k,y+i,bc);
}
}
}
}
}
5、TFT显示图像文件QDTFT_demo.c
#include "stm32f4xx.h"
#include "Lcd_Driver.h"
#include "GUI.h"
#include "delay.h"
#include "Picture.h"
#include "QDTFT_demo.h"
unsigned char Num[10]={0,1,2,3,4,5,6,7,8,9};
void Redraw_Mainmenu(void)
{
Lcd_Clear(GRAY0);
Gui_DrawFont_GBK16(48,0,BLUE,GRAY0,"CSDN");
// DisplayButtonUp(15,18,113,28);
Gui_DrawFont_GBK16(32,20,RED,GRAY0,"AXYZdong");
DisplayButtonUp(15,38,113,58); //x1,y1,x2,y2
Gui_DrawFont_GBK16(32,40,YELLOW,GRAY0,"文字显示");
DisplayButtonUp(15,68,113,88); //x1,y1,x2,y2
Gui_DrawFont_GBK16(2,70,BLUE,GRAY0,"Tel:17855525056");
DisplayButtonUp(15,98,113,118); //x1,y1,x2,y2
Gui_DrawFont_GBK16(0,100,RED,GRAY0,"www.AXYZdong.com");
delay_ms(1500);
}
void Num_Test(void)
{
u8 i=0;
Lcd_Clear(GRAY0);
Gui_DrawFont_GBK16(32,60,RED,GRAY0,"Num Test");
delay_ms(1000);
Lcd_Clear(GRAY0);
for(i=0;i<10;i++)
{
Gui_DrawFont_Num32((i%3)*42,32*(i/3),RED,GRAY0,Num[i+1]);
delay_ms(100);
}
}
void Font_Test(void)
{
Lcd_Clear(GRAY0);
Gui_DrawFont_GBK16(16,60,BLUE,GRAY0,"文字显示测试");
delay_ms(1000);
Lcd_Clear(GRAY0);
Gui_DrawFont_GBK16(16,20,YELLOW,GRAY0,"全动电子技术");
Gui_DrawFont_GBK16(16,40,BLUE,GRAY0,"专注液晶批发");
Gui_DrawFont_GBK16(16,60,RED,GRAY0, "全程技术支持")
Gui_DrawFont_GBK16(4,100,RED,GRAY0, "www.youdong.com");
delay_ms(1800);
}
void Color_Test(void)
{
u8 i=1;
Lcd_Clear(GRAY0);
Gui_DrawFont_GBK16(24,60,BLUE,GRAY0,"Color Test");
delay_ms(200);
while(i--)
{
Lcd_Clear(WHITE);
Lcd_Clear(BLACK);
Lcd_Clear(RED);
Lcd_Clear(GREEN);
Lcd_Clear(BLUE);
}
}
//取模方式 水平扫描 从左到右 低位在前
void showimage(const unsigned char *p) //显示40*40 QQ图片
{
int i,j,k;
unsigned char picH,picL;
Lcd_Clear(WHITE); //清屏
for(k=0;k<3;k++)
{
for(j=0;j<3;j++)
{
Lcd_SetRegion(40*j,40*k,40*j+39,40*k+39); //坐标设置
for(i=0;i<40*40;i++)
{
picL=*(p+i*2); //数据低位在前
picH=*(p+i*2+1);
LCD_WriteData_16Bit(picH<<8|picL);
}
}
}
}
//取模方式 水平扫描 从左到右 低位在前
void showphoto(const unsigned char *p) //显示128*128图片
{
int i;
unsigned char picH,picL;
// Lcd_Clear(WHITE); //清屏
Lcd_SetRegion(0,0,127,127); //坐标设置
for(i=0;i<128*128;i++)
{
picL=*(p+i*2); //数据低位在前
picH=*(p+i*2+1);
LCD_WriteData_16Bit(picH<<8|picL);
}
}
void QDTFT_Test_Demo(void)
{
// Lcd_Init();
LCD_LED_SET;//通过IO控制背光亮
Redraw_Mainmenu();//绘制主菜单(部分内容由于分辨率超出物理值可能无法显示)
// Color_Test();//简单纯色填充
// Num_Test();//数码管字体
// Font_Test();//中英文显示
// showphoto(gImage_Robotmaster);//图片显示示例
// delay_ms(1200);
// LCD_LED_CLR;//IO控制背光灭
}
6、主函数main.c
// 作 者 : AXYZdong
// 生成日期 : 2020-02-03
// 最近修改 : 2020-03-02
// 功能描述 : TFT SPI接口演示例程(stm32系列)
// GND 电源地
// VCC 接5V或3.3v电源
// LED 接PB9
// SCL 接PB10
// SDA 接PB12
// RS 接PB11
// RST 接PB14
// CS 接PB13
// ------------------------------------------------------------
/*Left--Right Pin:VCC GND GND NC NC LED SCL SDA RS RST CS*/
#include "stm32f4xx.h"
#include "delay.h"
#include "QDTFT_demo.h"
#include "Lcd_Driver.h"
#include "GUI.h"
int main(void)
{
SystemInit(); //System init.
delay_init(72); //Delay init.
Lcd_Init();
while(1)
{
QDTFT_Test_Demo(); //See the test details in QDTFT_Demo.c
}
}
上的代码比较多，如有不懂的地方可以私信我呢。
上面程序实现的功能我拍了两张图片，可以看看。
当然，显示字符、汉字和图片是TFT最最基本的功能，作为一个显示的媒介，如果与其他的器件建立起通信，将其他器件产生的信息在TFT上显示出来，这样我们就可以直观的获取想要的信息。
那么，该如何建立相互之间的通信关系？如何直观的显示在TFT上？是我今后所要探索和学习的地方。博客也会不定期更新，期待不久的某一篇会更新到相关内容。（hhh，先卖个关子）
下一篇，更精彩！
码字不易，大家的支持就是我坚持下去的动力。点赞后不要忘了关注我哦！