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Lizhenrong
2026-04-06 19:02:09 +08:00
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FW/Core/my_src/ltdc_drv.c Normal file
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#include "lcd_base_display.h"
#include "ltdc_drv.h"
//////////////////////////////////////////////////////////////////////////////////
//本程序只供学习使用，未经作者许可，不得用于其它任何用途
//ALIENTEK 阿波罗STM32H7开发板
//LTDC驱动代码
//正点原子@ALIENTEK
//技术论坛:www.openedv.com
//创建日期:2017/8/12
//版本：V1.0
//版权所有，盗版必究。
//Copyright(C) 广州市星翼电子科技有限公司 2014-2024
//All rights reserved
//////////////////////////////////////////////////////////////////////////////////
LTDC_HandleTypeDef LTDC_Handler; //LTDC句柄
//根据不同的颜色格式,定义帧缓存数组
#if LCD_PIXFORMAT==LCD_PIXFORMAT_ARGB8888||LCD_PIXFORMAT==LCD_PIXFORMAT_RGB888
//unsigned int ltdc_lcd_framebuf[800][480] __attribute__((at(LCD_FRAME_BUF_ADDR))); //定义最大屏分辨率时,LCD所需的帧缓存数组大小
static unsigned int * const my_address = (unsigned int *) (LCD_FRAME_BUF_ADDR);
#define ltdc_lcd_framebuf (*my_address)
static unsigned int * const my_address_2 = (unsigned int *) (LCD_FRAME_BUF_2_ADDR);
#define ltdc_lcd_framebuf_2 (*my_address_2)
#else
unsigned short ltdc_lcd_framebuf[1280][800] __attribute__((at(LCD_FRAME_BUF_ADDR))); //定义最大屏分辨率时,LCD所需的帧缓存数组大小
#endif
unsigned int *ltdc_framebuf[2]; //LTDC LCD帧缓存数组指针,必须指向对应大小的内存区域
_ltdc_dev lcdltdc; //管理LCD LTDC的重要参数
//打开LCD开关
//lcd_switch:1 打开,0，关闭
void LTDC_Switch(unsigned char sw)
{
if(sw==1) __HAL_LTDC_ENABLE(&LTDC_Handler);
else if(sw==0)__HAL_LTDC_DISABLE(&LTDC_Handler);
}
//开关指定层
//layerx:层号,0,第一层; 1,第二层
//sw:1 打开;0关闭
void LTDC_Layer_Switch(unsigned char layerx,unsigned char sw)
{
if(sw==1) __HAL_LTDC_LAYER_ENABLE(&LTDC_Handler,layerx);
else if(sw==0) __HAL_LTDC_LAYER_DISABLE(&LTDC_Handler,layerx);
__HAL_LTDC_RELOAD_CONFIG(&LTDC_Handler);
}
//选择层
//layerx:层号;0,第一层;1,第二层;
void LTDC_Select_Layer(unsigned char layerx)
{
lcdltdc.activelayer=layerx;
}
//设置LCD显示方向
//dir:0,竖屏；1,横屏
void LTDC_Display_Dir(unsigned char dir)
{
lcdltdc.dir=dir; //显示方向
if(dir==0) //竖屏
{
lcdltdc.width=lcdltdc.pheight;
lcdltdc.height=lcdltdc.pwidth;
}else if(dir==1) //横屏
{
lcdltdc.width=lcdltdc.pwidth;
lcdltdc.height=lcdltdc.pheight;
}
}
//画点函数
//x,y:坐标
//color:颜色值
void LTDC_Draw_Point(unsigned short x,unsigned short y,unsigned int color)
{
#if LCD_PIXFORMAT==LCD_PIXFORMAT_ARGB8888||LCD_PIXFORMAT==LCD_PIXFORMAT_RGB888
if(lcdltdc.dir) //横屏
{
*(unsigned int*)((unsigned int)ltdc_framebuf[lcdltdc.activelayer]+lcdltdc.pixsize*(lcdltdc.pwidth*y+x))=color;
}else //竖屏
{
*(unsigned int*)((unsigned int)ltdc_framebuf[lcdltdc.activelayer]+lcdltdc.pixsize*(lcdltdc.pwidth*(lcdltdc.pheight-x-1)+y))=color;
}
#else
if(lcdltdc.dir) //横屏
{
*(unsigned short*)((unsigned int)ltdc_framebuf[lcdltdc.activelayer]+lcdltdc.pixsize*(lcdltdc.pwidth*y+x))=color;
}else //竖屏
{
*(unsigned short*)((unsigned int)ltdc_framebuf[lcdltdc.activelayer]+lcdltdc.pixsize*(lcdltdc.pwidth*(lcdltdc.pheight-x-1)+y))=color;
}
#endif
}
//读点函数
//返回值:颜色值
unsigned int LTDC_Read_Point(unsigned short x,unsigned short y)
{
#if LCD_PIXFORMAT==LCD_PIXFORMAT_ARGB8888||LCD_PIXFORMAT==LCD_PIXFORMAT_RGB888
if(lcdltdc.dir) //横屏
{
return *(unsigned int*)((unsigned int)ltdc_framebuf[lcdltdc.activelayer]+lcdltdc.pixsize*(lcdltdc.pwidth*y+x));
}else //竖屏
{
return *(unsigned int*)((unsigned int)ltdc_framebuf[lcdltdc.activelayer]+lcdltdc.pixsize*(lcdltdc.pwidth*(lcdltdc.pheight-x-1)+y));
}
#else
if(lcdltdc.dir) //横屏
{
return *(unsigned short*)((unsigned int)ltdc_framebuf[lcdltdc.activelayer]+lcdltdc.pixsize*(lcdltdc.pwidth*y+x));
}else //竖屏
{
return *(unsigned short*)((unsigned int)ltdc_framebuf[lcdltdc.activelayer]+lcdltdc.pixsize*(lcdltdc.pwidth*(lcdltdc.pheight-x-1)+y));
}
#endif
}
//LTDC填充矩形,DMA2D填充
//(sx,sy),(ex,ey):填充矩形对角坐标,区域大小为:(ex-sx+1)*(ey-sy+1)
//注意:sx,ex,不能大于lcddev.width-1;sy,ey,不能大于lcddev.height-1!!!
//color:要填充的颜色
void LTDC_Fill(unsigned short sx,unsigned short sy,unsigned short ex,unsigned short ey,unsigned int color)
{
unsigned int psx,psy,pex,pey; //以LCD面板为基准的坐标系,不随横竖屏变化而变化
unsigned int timeout=0;
unsigned short offline;
unsigned int addr;
//坐标系转换
if(lcdltdc.dir) //横屏
{
psx=sx;psy=sy;
pex=ex;pey=ey;
}else //竖屏
{
psx=sy;psy=lcdltdc.pheight-ex-1;
pex=ey;pey=lcdltdc.pheight-sx-1;
}
offline=lcdltdc.pwidth-(pex-psx+1);
addr=((unsigned int)ltdc_framebuf[lcdltdc.activelayer]+lcdltdc.pixsize*(lcdltdc.pwidth*psy+psx));
RCC->AHB1ENR|=1<<23; //使能DM2D时钟
DMA2D->CR=3<<16; //寄存器到存储器模式
DMA2D->OPFCCR=LCD_PIXFORMAT; //设置颜色格式
DMA2D->OOR=offline; //设置行偏移
DMA2D->CR&=~(1<<0); //先停止DMA2D
DMA2D->OMAR=addr; //输出存储器地址
DMA2D->NLR=(pey-psy+1)|((pex-psx+1)<<16); //设定行数寄存器
DMA2D->OCOLR=color; //设定输出颜色寄存器
DMA2D->CR|=1<<0; //启动DMA2D
while((DMA2D->ISR&(1<<1))==0) //等待传输完成
{
timeout++;
if(timeout>0X1FFFFF)break; //超时退出
}
DMA2D->IFCR|=1<<1; //清除传输完成标志
}
//在指定区域内填充单个颜色
//(sx,sy),(ex,ey):填充矩形对角坐标,区域大小为:(ex-sx+1)*(ey-sy+1)
//color:要填充的颜色
//void LTDC_Fill(unsigned short sx,unsigned short sy,unsigned short ex,unsigned short ey,unsigned int color)
//{
// unsigned int psx,psy,pex,pey; //以LCD面板为基准的坐标系,不随横竖屏变化而变化
// unsigned int timeout=0;
// unsigned short offline;
// unsigned int addr;
// if(ex>=lcdltdc.width)ex=lcdltdc.width-1;
// if(ey>=lcdltdc.height)ey=lcdltdc.height-1;
// //坐标系转换
// if(lcdltdc.dir) //横屏
// {
// psx=sx;psy=sy;
// pex=ex;pey=ey;
// }else //竖屏
// {
// psx=sy;psy=lcdltdc.pheight-ex-1;
// pex=ey;pey=lcdltdc.pheight-sx-1;
// }
// offline=lcdltdc.pwidth-(pex-psx+1);
// addr=((unsigned int)ltdc_framebuf[lcdltdc.activelayer]+lcdltdc.pixsize*(lcdltdc.pwidth*psy+psx));
// if(LCD_PIXFORMAT==LCD_PIXEL_FORMAT_RGB565) //如果是RGB565格式的话需要进行颜色转换，将16bit转换为32bit的
// {
// color=((color&0X0000F800)<<8)|((color&0X000007E0)<<5)|((color&0X0000001F)<<3);
// }
// //配置DMA2D的模式
// DMA2D_Handler.Instance=DMA2D;
// DMA2D_Handler.Init.Mode=DMA2D_R2M; //内存到存储器模式
// DMA2D_Handler.Init.ColorMode=LCD_PIXFORMAT; //设置颜色格式
// DMA2D_Handler.Init.OutputOffset=offline; //输出偏移
// HAL_DMA2D_Init(&DMA2D_Handler); //初始化DMA2D
// HAL_DMA2D_ConfigLayer(&DMA2D_Handler,lcdltdc.activelayer); //层配置
// HAL_DMA2D_Start(&DMA2D_Handler,color,(unsigned int)addr,pex-psx+1,pey-psy+1);//开启传输
// HAL_DMA2D_PollForTransfer(&DMA2D_Handler,1000);//传输数据
// while((__HAL_DMA2D_GET_FLAG(&DMA2D_Handler,DMA2D_FLAG_TC)==0)&&(timeout<0X5000))//等待DMA2D完成
// {
// timeout++;
// }
// __HAL_DMA2D_CLEAR_FLAG(&DMA2D_Handler,DMA2D_FLAG_TC); //清除传输完成标志
//}
//在指定区域内填充指定颜色块,DMA2D填充
//此函数仅支持unsigned short,RGB565格式的颜色数组填充.
//(sx,sy),(ex,ey):填充矩形对角坐标,区域大小为:(ex-sx+1)*(ey-sy+1)
//注意:sx,ex,不能大于lcddev.width-1;sy,ey,不能大于lcddev.height-1!!!
//color:要填充的颜色数组首地址
void LTDC_Color_Fill(unsigned short sx,unsigned short sy,unsigned short ex,unsigned short ey,unsigned short *color)
{
unsigned int psx,psy,pex,pey; //以LCD面板为基准的坐标系,不随横竖屏变化而变化
unsigned int timeout=0;
unsigned short offline;
unsigned int addr;
//坐标系转换
if(lcdltdc.dir) //横屏
{
psx=sx;psy=sy;
pex=ex;pey=ey;
}else //竖屏
{
psx=sy;psy=lcdltdc.pheight-ex-1;
pex=ey;pey=lcdltdc.pheight-sx-1;
}
offline=lcdltdc.pwidth-(pex-psx+1);
addr=((unsigned int)ltdc_framebuf[lcdltdc.activelayer]+lcdltdc.pixsize*(lcdltdc.pwidth*psy+psx));
RCC->AHB1ENR|=1<<23; //使能DM2D时钟
DMA2D->CR=0<<16; //存储器到存储器模式
DMA2D->FGPFCCR=LCD_PIXFORMAT; //设置颜色格式
DMA2D->FGOR=0; //前景层行偏移为0
DMA2D->OOR=offline; //设置行偏移
DMA2D->CR&=~(1<<0); //先停止DMA2D
DMA2D->FGMAR=(unsigned int)color; //源地址
DMA2D->OMAR=addr; //输出存储器地址
DMA2D->NLR=(pey-psy+1)|((pex-psx+1)<<16); //设定行数寄存器
DMA2D->CR|=1<<0; //启动DMA2D
while((DMA2D->ISR&(1<<1))==0) //等待传输完成
{
timeout++;
if(timeout>0X1FFFFF)break; //超时退出
}
DMA2D->IFCR|=1<<1; //清除传输完成标志
}
//LCD清屏
//color:颜色值
void LTDC_Clear(unsigned int color)
{
LTDC_Fill(0,0,lcdltdc.width-1,lcdltdc.height-1,color);
}
//LTDC时钟(Fdclk)设置函数
//PLL3_VCO Input=HSE_VALUE/PLL3M
//PLL3_VCO Output=PLL3_VCO Input * PLL3N
//PLLLCDCLK = PLL3_VCO Output/PLL3R
//假如HSE_VALUE=25MHz，PLL3M=5，PLL3N=160,PLL3R=88
//LTDCLK=PLLLCDCLK=25/5*160/88=9MHz
//返回值:0,成功;1,失败。
unsigned char LTDC_Clk_Set(unsigned int pll3m,unsigned int pll3n,unsigned int pll3r)
{
RCC_PeriphCLKInitTypeDef PeriphClkIniture;
PeriphClkIniture.PeriphClockSelection = RCC_PERIPHCLK_LTDC;
PeriphClkIniture.PLL3.PLL3M = pll3m;
PeriphClkIniture.PLL3.PLL3N = pll3n;
PeriphClkIniture.PLL3.PLL3P = 2;
PeriphClkIniture.PLL3.PLL3Q = 2;
PeriphClkIniture.PLL3.PLL3R = pll3r;
if(HAL_RCCEx_PeriphCLKConfig(&PeriphClkIniture)==HAL_OK) //配置像素时钟，这里配置为时钟为18.75MHZ
{
return 0; //成功
}
else return 1; //失败
}
//LTDC,层颜窗口设置,窗口以LCD面板坐标系为基准
//注意:此函数必须在LTDC_Layer_Parameter_Config之后再设置.
//layerx:层值,0/1.
//sx,sy:起始坐标
//width,height:宽度和高度
void LTDC_Layer_Window_Config(unsigned char layerx,unsigned short sx,unsigned short sy,unsigned short width,unsigned short height)
{
HAL_LTDC_SetWindowPosition(&LTDC_Handler,sx,sy,layerx); //设置窗口的位置
HAL_LTDC_SetWindowSize(&LTDC_Handler,width,height,layerx);//设置窗口大小
}
//LTDC,基本参数设置.
//注意:此函数,必须在LTDC_Layer_Window_Config之前设置.
//layerx:层值,0/1.
//bufaddr:层颜色帧缓存起始地址
//pixformat:颜色格式.0,ARGB8888;1,RGB888;2,RGB565;3,ARGB1555;4,ARGB4444;5,L8;6;AL44;7;AL88
//alpha:层颜色Alpha值,0,全透明;255,不透明
//alpha0:默认颜色Alpha值,0,全透明;255,不透明
//bfac1:混合系数1,4(100),恒定的Alpha;6(101),像素Alpha*恒定Alpha
//bfac2:混合系数2,5(101),恒定的Alpha;7(111),像素Alpha*恒定Alpha
//bkcolor:层默认颜色,32位,低24位有效,RGB888格式
//返回值:无
void LTDC_Layer_Parameter_Config(unsigned char layerx,unsigned int bufaddr,unsigned char pixformat,unsigned char alpha,unsigned char alpha0,unsigned char bfac1,unsigned char bfac2,unsigned int bkcolor)
{
LTDC_LayerCfgTypeDef pLayerCfg;
pLayerCfg.WindowX0=0; //窗口起始X坐标
pLayerCfg.WindowY0=0; //窗口起始Y坐标
pLayerCfg.WindowX1=lcdltdc.pwidth; //窗口终止X坐标
pLayerCfg.WindowY1=lcdltdc.pheight; //窗口终止Y坐标
pLayerCfg.PixelFormat=pixformat; //像素格式
pLayerCfg.Alpha=alpha; //Alpha值设置，0~255,255为完全不透明
pLayerCfg.Alpha0=alpha0; //默认Alpha值
pLayerCfg.BlendingFactor1=(unsigned int)bfac1<<8; //设置层混合系数
pLayerCfg.BlendingFactor2=(unsigned int)bfac2<<8; //设置层混合系数
pLayerCfg.FBStartAdress=bufaddr; //设置层颜色帧缓存起始地址
pLayerCfg.ImageWidth=lcdltdc.pwidth; //设置颜色帧缓冲区的宽度
pLayerCfg.ImageHeight=lcdltdc.pheight; //设置颜色帧缓冲区的高度
pLayerCfg.Backcolor.Red=(unsigned char)(bkcolor&0X00FF0000)>>16; //背景颜色红色部分
pLayerCfg.Backcolor.Green=(unsigned char)(bkcolor&0X0000FF00)>>8; //背景颜色绿色部分
pLayerCfg.Backcolor.Blue=(unsigned char)bkcolor&0X000000FF; //背景颜色蓝色部分
HAL_LTDC_ConfigLayer(&LTDC_Handler,&pLayerCfg,layerx); //设置所选中的层
}
//LCD初始化函数
void LTDC_Init(void)
{
unsigned short lcdid=0;
lcdltdc.pwidth=800; //面板宽度,单位:像素
lcdltdc.pheight=480; //面板高度,单位:像素
lcdltdc.hsw=1; //水平同步宽度
lcdltdc.hbp=46; //水平后廊
lcdltdc.hfp=210; //水平前廊
lcdltdc.vsw=1; //垂直同步宽度
lcdltdc.vbp=23; //垂直后廊
lcdltdc.vfp=22; //垂直前廊
//LTDC_Clk_Set(5,160,47);//设置像素时钟 17Mhz
lcddev.width=lcdltdc.pwidth;
lcddev.height=lcdltdc.pheight;
#if LCD_PIXFORMAT==LCD_PIXFORMAT_ARGB8888||LCD_PIXFORMAT==LCD_PIXFORMAT_RGB888
ltdc_framebuf[0]=(unsigned int*)&ltdc_lcd_framebuf;
ltdc_framebuf[1]=(unsigned int*)&ltdc_lcd_framebuf_2;
lcdltdc.pixsize=4; //每个像素占4个字节
#else
lcdltdc.pixsize=2; //每个像素占2个字节
ltdc_framebuf[0]=(unsigned int*)&ltdc_lcd_framebuf;
#endif
/*
//LTDC配置
LTDC_Handler.Instance=LTDC;
LTDC_Handler.Init.HSPolarity=LTDC_HSPOLARITY_AL; //水平同步极性
LTDC_Handler.Init.VSPolarity=LTDC_VSPOLARITY_AL; //垂直同步极性
LTDC_Handler.Init.DEPolarity=LTDC_DEPOLARITY_AL; //数据使能极性
LTDC_Handler.Init.PCPolarity=LTDC_PCPOLARITY_IPC; //像素时钟极性
//if(lcdid==0X1018)LTDC_Handler.Init.PCPolarity=LTDC_PCPOLARITY_IIPC; //像素时钟极性相反
LTDC_Handler.Init.HorizontalSync=lcdltdc.hsw-1; //水平同步宽度
LTDC_Handler.Init.VerticalSync=lcdltdc.vsw-1; //垂直同步宽度
LTDC_Handler.Init.AccumulatedHBP=lcdltdc.hsw+lcdltdc.hbp-1; //水平同步后沿宽度
LTDC_Handler.Init.AccumulatedVBP=lcdltdc.vsw+lcdltdc.vbp-1; //垂直同步后沿高度
LTDC_Handler.Init.AccumulatedActiveW=lcdltdc.hsw+lcdltdc.hbp+lcdltdc.pwidth-1;//有效宽度
LTDC_Handler.Init.AccumulatedActiveH=lcdltdc.vsw+lcdltdc.vbp+lcdltdc.pheight-1;//有效高度
LTDC_Handler.Init.TotalWidth=lcdltdc.hsw+lcdltdc.hbp+lcdltdc.pwidth+lcdltdc.hfp-1; //总宽度
LTDC_Handler.Init.TotalHeigh=lcdltdc.vsw+lcdltdc.vbp+lcdltdc.pheight+lcdltdc.vfp-1; //总高度
LTDC_Handler.Init.Backcolor.Red=0; //屏幕背景层红色部分
LTDC_Handler.Init.Backcolor.Green=0; //屏幕背景层绿色部分
LTDC_Handler.Init.Backcolor.Blue=0; //屏幕背景色蓝色部分
HAL_LTDC_Init(&LTDC_Handler);
//层配置
//LTDC_Layer_Parameter_Config(0,(unsigned int)ltdc_framebuf[0],LCD_PIXFORMAT,255,0,6,7,0X000000);//层参数配置
//LTDC_Layer_Window_Config(0,0,0,lcdltdc.pwidth,lcdltdc.pheight); //层窗口配置,以LCD面板坐标系为基准,不要随便修改!
*/
LTDC_Display_Dir(1); //默认横屏
LTDC_Select_Layer(1); //选择第2层
LTDC_Clear(0); //清屏
LTDC_Select_Layer(0); //选择第1层
LTDC_Clear(0XFF000000); //清屏
}