电子量产工具——2-4显示系统

电子量产工具——2-4显示系统_单元测试

文章目录

• 电子量产工具——2-4显示系统_单元测试
• 软件总框架
• 
  

  一、单元测试：规范代码结构、添加测试程序

• 
  

  二、代码

• • 1.display（有两个 disp_manager.c和framebuffer.c）
  • 2.include（disp_manager.h）
  • 3.unittest（测试文件disp_test.c）
• 总结

---

软件总框架

一、单元测试：规范代码结构、添加测试程序

二、代码 1.display（有两个 disp_manager.c和framebuffer.c）

disp_manager.c

#include 
#include 
#include 

/* 管理底层的LCD、WEB */
static PDispOpr g_DispDevs = NULL;
static PDispOpr g_DispDefault = NULL;
static DispBuff g_tDispBuff;
static int line_width;
static int pixel_width;

int PutPixel(int x, int y, unsigned int dwColor)
{
	unsigned char *pen_8 = (unsigned char *)(g_tDispBuff.buff+y*line_width+x*pixel_width);
	unsigned short *pen_16;	
	unsigned int *pen_32;	

	unsigned int red, green, blue;	

	pen_16 = (unsigned short *)pen_8;
	pen_32 = (unsigned int *)pen_8;

	switch (g_tDispBuff.iBpp)
	{
		case 8:
		{
			*pen_8 = dwColor;
			break;
		}
		case 16:
		{
			/* 565 */
			red   = (dwColor >> 16) & 0xff;
			green = (dwColor >> 8) & 0xff;
			blue  = (dwColor >> 0) & 0xff;
			dwColor = ((red >> 3) << 11) | ((green >> 2) << 5) | (blue >> 3);
			*pen_16 = dwColor;
			break;
		}
		case 32:
		{
			*pen_32 = dwColor;
			break;
		}
		default:
		{
			printf("can't surport %dbpp\n", g_tDispBuff.iBpp);
			return -1;
			break;
		}
	}

	return 0;
}



void RegisterDisplay(PDispOpr ptDispOpr)
{
	ptDispOpr->ptNext = g_DispDevs;
	g_DispDevs = ptDispOpr;
}


int SelectDefaultDisplay(char *name)
{
	PDispOpr pTmp = g_DispDevs;
	while (pTmp) 
	{
		if (strcmp(name, pTmp->name) == 0)
		{
			g_DispDefault = pTmp;
			return 0;
		}

		pTmp = pTmp->ptNext;
	}
	return -1;
}

int InitDefaultDisplay(void)
{
	int ret;
	
	ret = g_DispDefault->DeviceInit();
	if (ret)
	{
		printf("DeviceInit err\n");
		return -1;
	}

	
	ret = g_DispDefault->GetBuffer(&g_tDispBuff);
	if (ret)
	{
		printf("GetBuffer err\n");
		return -1;
	}

	line_width  = g_tDispBuff.iXres * g_tDispBuff.iBpp/8;
	pixel_width = g_tDispBuff.iBpp/8;

	return 0;
}


PDispBuff GetDisplayBuffer(void)
{
	return &g_tDispBuff;
}


int FlushDisplayRegion(PRegion ptRegion, PDispBuff ptDispBuff)
{
	return g_DispDefault->FlushRegion(ptRegion, ptDispBuff);
}


void DisplayInit(void)
{
	
	extern void FramebufferInit(void);
	FramebufferInit();
}

framebuffer.c

#include 
#include 
#include 

/* 管理底层的LCD、WEB */
static PDispOpr g_DispDevs = NULL;
static PDispOpr g_DispDefault = NULL;
static DispBuff g_tDispBuff;
static int line_width;
static int pixel_width;

int PutPixel(int x, int y, unsigned int dwColor)
{
	unsigned char *pen_8 = (unsigned char *)(g_tDispBuff.buff+y*line_width+x*pixel_width);
	unsigned short *pen_16;	
	unsigned int *pen_32;	

	unsigned int red, green, blue;	

	pen_16 = (unsigned short *)pen_8;
	pen_32 = (unsigned int *)pen_8;

	switch (g_tDispBuff.iBpp)
	{
		case 8:
		{
			*pen_8 = dwColor;
			break;
		}
		case 16:
		{
			/* 565 */
			red   = (dwColor >> 16) & 0xff;
			green = (dwColor >> 8) & 0xff;
			blue  = (dwColor >> 0) & 0xff;
			dwColor = ((red >> 3) << 11) | ((green >> 2) << 5) | (blue >> 3);
			*pen_16 = dwColor;
			break;
		}
		case 32:
		{
			*pen_32 = dwColor;
			break;
		}
		default:
		{
			printf("can't surport %dbpp\n", g_tDispBuff.iBpp);
			return -1;
			break;
		}
	}

	return 0;
}



void RegisterDisplay(PDispOpr ptDispOpr)
{
	ptDispOpr->ptNext = g_DispDevs;
	g_DispDevs = ptDispOpr;
}


int SelectDefaultDisplay(char *name)
{
	PDispOpr pTmp = g_DispDevs;
	while (pTmp) 
	{
		if (strcmp(name, pTmp->name) == 0)
		{
			g_DispDefault = pTmp;
			return 0;
		}

		pTmp = pTmp->ptNext;
	}
	return -1;
}

int InitDefaultDisplay(void)
{
	int ret;
	
	ret = g_DispDefault->DeviceInit();
	if (ret)
	{
		printf("DeviceInit err\n");
		return -1;
	}

	
	ret = g_DispDefault->GetBuffer(&g_tDispBuff);
	if (ret)
	{
		printf("GetBuffer err\n");
		return -1;
	}

	line_width  = g_tDispBuff.iXres * g_tDispBuff.iBpp/8;
	pixel_width = g_tDispBuff.iBpp/8;

	return 0;
}


PDispBuff GetDisplayBuffer(void)
{
	return &g_tDispBuff;
}


int FlushDisplayRegion(PRegion ptRegion, PDispBuff ptDispBuff)
{
	return g_DispDefault->FlushRegion(ptRegion, ptDispBuff);
}


void DisplayInit(void)
{
	
	extern void FramebufferInit(void);
	FramebufferInit();
}

1.display 初始化 {//2.调用framebuffer初始化}
3.注册LCD硬件相关的结构体
4.注册LCD硬件相关函数 放入 g_DispDevs 链表
5.对应不同的显示方式 ——》SelectDefaultDisplay
6.来选择默认的输出设备
7.来初始化默认的设备 ————》》然后去调用 PutPixel
8.绘制想要的图片 ————》》 更新到硬件上去 FlushDisplayRegion
9.绘制好的区域 更新(刷)到硬件上去

2.include（disp_manager.h）

disp_manager.h

#ifndef _DISP_MANAGER_H
#define _DISP_MANAGER_H

#ifndef NULL
#define NULL (void *)0
#endif

typedef struct DispBuff {
	int iXres;
	int iYres;
	int iBpp;
	char *buff;
}DispBuff, *PDispBuff;


typedef struct Region {
	int iLeftUpX;
	int iLeftUpY;
	int iWidth;
	int iHeigh;
}Region, *PRegion;

typedef struct DispOpr {
	char *name;
	int (*DeviceInit)(void);
	int (*DeviceExit)(void);
	int (*GetBuffer)(PDispBuff ptDispBuff);
	int (*FlushRegion)(PRegion ptRegion, PDispBuff ptDispBuff);
	struct DispOpr *ptNext;
}DispOpr, *PDispOpr;

void RegisterDisplay(PDispOpr ptDispOpr);

void DisplayInit(void);
int SelectDefaultDisplay(char *name);
int InitDefaultDisplay(void);
int PutPixel(int x, int y, unsigned int dwColor);
int FlushDisplayRegion(PRegion ptRegion, PDispBuff ptDispBuff);
PDispBuff GetDisplayBuffer(void);

#endif

1.DispBuff 数据结构抽象 显示屏BUFFER
2.Region 数据结构抽象 更新到硬件
3.DispOpr 数据结构抽象 显示屏硬件 *** 作

3.unittest（测试文件disp_test.c）

disp_test.c

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

#include 

#define FONTDATAMAX 4096

static const unsigned char fontdata_8x16[FONTDATAMAX] ={...省略...}
void lcd_put_ascii(int x, int y, unsigned char c)
{
	unsigned char *dots = (unsigned char *)&fontdata_8x16[c*16];
	int i, b;
	unsigned char byte;

	for (i = 0; i < 16; i++)
	{
		byte = dots[i];
		for (b = 7; b >= 0; b--)
		{
			if (byte & (1<<b))
			{
				/* show */
				PutPixel(x+7-b, y+i, 0xffffff); /* 白 */
			}
			else
			{
				/* hide */
				PutPixel(x+7-b, y+i, 0); /* 黑 */
			}
		}
	}
}

int main(int argc, char **argv)
{
	Region region;
	PDispBuff ptBuffer;
		
	DisplayInit();

	SelectDefaultDisplay("fb");

	InitDefaultDisplay();

	lcd_put_ascii(100, 100, 'A');

	region.iLeftUpX = 100;
	region.iLeftUpY = 100;
	region.iWidth   = 8;
	region.iHeigh   = 16;

	ptBuffer = GetDisplayBuffer();
	FlushDisplayRegion(&region, ptBuffer);
	
	return 0;	
}

---

总结

makefile 编译

然后各种调试

要清除LCD的GUI

目前只能显示一个字母