ILI9325,能读取一个像素点的颜色吗？ (amobbs.com 阿莫电子技术论坛) -

yangshuhe33 发表于 2010-10-14 08:35:39

ILI9325,能读取一个像素点的颜色吗？

ILI9325,。我想移植ucgui。

void draw_point(int x,int y,int color)
{
IOWR_ALTERA_AVALON_PIO_DATA(CS_BASE, 0);
Lcd_Write_Com(0x0020);
Lcd_Write_Data(x); //设置X坐标位置
Lcd_Write_Com(0x0021);
Lcd_Write_Data(y); //设置Y坐标位置
Lcd_Write_Com(0x0022);
Lcd_Write_Data(color);
IOWR_ALTERA_AVALON_PIO_DATA(CS_BASE, 1);。
}

还差int get_point(int x,int y)函数不会写。店主没提供。

turf456 发表于 2010-10-14 08:38:10

读和写类似吧？记得资料说Gram可读可写。

youki1234 发表于 2010-10-14 08:50:52

可以，仔细看看数据手册，我弄过。代码一下找不到了，反正不难，和其他差不多。

yangshuhe33 发表于 2010-10-14 09:39:33

我看不懂手册，哪位能大发慈悲帮我写下吗？

wqm521216 发表于 2010-10-14 14:44:25

int get_point(int x,int y)
{
int color;
IOWR_ALTERA_AVALON_PIO_DATA(CS_BASE, 0);
Lcd_Write_Com(0x0020);
Lcd_Write_Data(x); //设置X坐标位置
Lcd_Write_Com(0x0021);
Lcd_Write_Data(y); //设置Y坐标位置
color = Lcd_Read_Data(0x0022); //获取指定座标的颜色值
IOWR_ALTERA_AVALON_PIO_DATA(CS_BASE, 1);
return color;
}
不知道对不对，你试试吧，我的就是这样的，你的读取9325内部寄存器数据的函数是不是Lcd_Read_Data();如果不是的话，请修改一下。

yangshuhe33 发表于 2010-10-14 15:15:55

谢谢，
Lcd_Read_Data();这个函数也没有，不知道怎么写。看到过的函数都是关于写的，没有读的。
你是怎么弄的这个函数》？

yangshuhe33 发表于 2010-10-14 16:04:14

color = Lcd_Read_Data(0x0022); 这里面的参数是什么意思？

yangshuhe33 发表于 2010-10-14 16:05:35

关键就是这个函数啊，外面那个函数。。。

wqm521216 发表于 2010-10-14 17:21:06

你能不能把你的代码打包发上来？

yangshuhe33 发表于 2010-10-14 21:28:54

#include"system.h"
#include <io.h>
#include<stdio.h>
#include <unistd.h>
#include <altera_avalon_pio_regs.h>
#include <alt_types.h>

void Lcd_Write_Data(alt_u16 dat);
void Draw_Point(alt_u16 x,alt_u16 y,alt_u16 color);//画点
void Lcd_Write_Com(alt_u16 index);

void delayms(unsigned int time)
{
int i;
for(i=0;i<time;i++){
   usleep(1011);
}
}

void LCD_Writ_Bus(alt_u16 dat) //并行数据写入
{
IOWR_ALTERA_AVALON_PIO_DIRECTION(DATA_BASE, 0xffff);//cmd out
IOWR_ALTERA_AVALON_PIO_DATA(DATA_BASE, dat);//dat
IOWR_ALTERA_AVALON_PIO_DATA(WR_BASE, 0);
IOWR_ALTERA_AVALON_PIO_DATA(WR_BASE, 1);
}

void Lcd_Write_Com(alt_u16 index)//发送命令
{
IOWR_ALTERA_AVALON_PIO_DATA(RS_BASE, 0);//rs=0
LCD_Writ_Bus(index);
}

void Lcd_Write_Data(alt_u16 dat) //发送数据
{
IOWR_ALTERA_AVALON_PIO_DATA(RS_BASE, 1);//rs=1
LCD_Writ_Bus(dat);
}

void Draw_Point(alt_u16 x,alt_u16 y,alt_u16 color)//画点
{
//IOWR_ALTERA_AVALON_PIO_DATA(CS_BASE, 0);
Lcd_Write_Com(0x0020);
Lcd_Write_Data(x); //设置X坐标位置
Lcd_Write_Com(0x0021);
Lcd_Write_Data(y); //设置Y坐标位置
Lcd_Write_Com(0x0022);
Lcd_Write_Data(color);
//IOWR_ALTERA_AVALON_PIO_DATA(CS_BASE, 1);
}

alt_u16 Get_Point(alt_u16 x,alt_u16 y)
{
alt_u16 i;
Lcd_Write_Com(0x0020);
Lcd_Write_Data(x); //设置X坐标位置
Lcd_Write_Com(0x0021);
Lcd_Write_Data(y); //设置Y坐标位置
Lcd_Write_Com(0x0022);

IOWR_ALTERA_AVALON_PIO_DIRECTION(DATA_BASE, 0x0000);
IOWR_ALTERA_AVALON_PIO_DATA(RS_BASE, 1);//rs=1

IOWR_ALTERA_AVALON_PIO_DATA(RD_BASE, 0);
//i=IORD_ALTERA_AVALON_PIO_DATA(DATA_BASE);
IOWR_ALTERA_AVALON_PIO_DATA(RD_BASE, 1);

IOWR_ALTERA_AVALON_PIO_DATA(RD_BASE, 0);
i=IORD_ALTERA_AVALON_PIO_DATA(DATA_BASE);
IOWR_ALTERA_AVALON_PIO_DATA(RD_BASE, 1);
return i;
}

void Address_set(unsigned int x1,unsigned int y1,unsigned int x2,unsigned int y2)
{
Lcd_Write_Com(0x20);Lcd_Write_Data(x1); //设置X坐标位置
Lcd_Write_Com(0x21);Lcd_Write_Data(y1); //设置Y坐标位置
Lcd_Write_Com(0x50);Lcd_Write_Data(x1); //开始X
Lcd_Write_Com(0x52);Lcd_Write_Data(y1); //开始Y
Lcd_Write_Com(0x51);Lcd_Write_Data(x2); //结束X
Lcd_Write_Com(0x53);Lcd_Write_Data(y2); //结束Y
Lcd_Write_Com(0x22);
}

void Pant(alt_u16 dat)
{
int i,j;
//IOWR_ALTERA_AVALON_PIO_DATA(CS_BASE, 0);//打开片选使能
//Address_set(0,0,240,320);
for(i=0;i<320;i++)
{
   for (j=0;j<240;j++)
   {
         //Lcd_Write_Data(dat);
         Draw_Point(j,i,dat);
   }

   }
//IOWR_ALTERA_AVALON_PIO_DATA(CS_BASE, 1);//关闭片选使能
}

void Lcd_Init(void)
{
IOWR_ALTERA_AVALON_PIO_DATA(RESET_BASE, 1);
delayms(5);
IOWR_ALTERA_AVALON_PIO_DATA(RESET_BASE,0);
delayms(5);
IOWR_ALTERA_AVALON_PIO_DATA(RESET_BASE, 1);
IOWR_ALTERA_AVALON_PIO_DATA(CS_BASE, 1);
IOWR_ALTERA_AVALON_PIO_DATA(RD_BASE, 1);
IOWR_ALTERA_AVALON_PIO_DATA(WR_BASE, 1);
delayms(5);

IOWR_ALTERA_AVALON_PIO_DATA(CS_BASE, 0);//打开片选使能
//************* Start Initial Sequence **********//
Lcd_Write_Com(0xE5); Lcd_Write_Data((0x78<<8)+0xF0); // set SRAM internal timing
Lcd_Write_Com(0x01); Lcd_Write_Data((0x01<<8)+0x00); // set SS and SM bit
Lcd_Write_Com(0x02); Lcd_Write_Data((0x07<<8)+0x00); // set 1 line inversion
Lcd_Write_Com(0x03); Lcd_Write_Data((0x10<<8)+0x30); // set GRAM write direction and BGR=1.
Lcd_Write_Com(0x04); Lcd_Write_Data(0x0000); // Resize register
Lcd_Write_Com(0x08); Lcd_Write_Data((0x02<<8)+0x07); // set the back porch and front porch
Lcd_Write_Com(0x09); Lcd_Write_Data(0x0000); // set non-display area refresh cycle ISC
Lcd_Write_Com(0x0A); Lcd_Write_Data(0x0000); // FMARK function
Lcd_Write_Com(0x0C); Lcd_Write_Data(0x0000); // RGB interface setting
Lcd_Write_Com(0x0D); Lcd_Write_Data(0x0000); // Frame marker Position
Lcd_Write_Com(0x0F); Lcd_Write_Data(0x0000); // RGB interface polarity
//*************Power On sequence ****************//
Lcd_Write_Com(0x10); Lcd_Write_Data(0x00); // SAP, BT, AP, DSTB, SLP, STB
Lcd_Write_Com(0x11); Lcd_Write_Data(0x07); // DC1, DC0, VC
Lcd_Write_Com(0x12); Lcd_Write_Data(0x00); // VREG1OUT voltage
Lcd_Write_Com(0x13); Lcd_Write_Data(0x00); // VDV for VCOM amplitude
Lcd_Write_Com(0x07); Lcd_Write_Data(0x01);
delayms(50); // Dis-charge capacitor power voltage
Lcd_Write_Com(0x0010); Lcd_Write_Data((0x10<<8)+0x90); // 1490//SAP, BT, AP, DSTB, SLP, STB
Lcd_Write_Com(0x0011); Lcd_Write_Data((0x02<<8)+0x27); // DC1, DC0, VC
delayms(50); // Delay 50ms
Lcd_Write_Com(0x0012); Lcd_Write_Data(0x001F); //001C// Internal reference voltage= Vci;
delayms(50); // Delay 50ms
Lcd_Write_Com(0x0013); Lcd_Write_Data((0x15<<8)+0x00); //0x1000//1400 Set VDV for VCOM amplitude1A00
Lcd_Write_Com(0x0029); Lcd_Write_Data(0x0027); //0x0012 //001aSet VCM for VCOMH//0x00250034
Lcd_Write_Com(0x002B); Lcd_Write_Data(0x000D); // Set Frame Rate 000C
delayms(50); // Delay 50ms
Lcd_Write_Com(0x0020); Lcd_Write_Data(0x0000); // GRAM horizontal Address
Lcd_Write_Com(0x0021); Lcd_Write_Data(0x0000); // GRAM Vertical Address
// ----------- Adjust the Gamma Curve ----------//
Lcd_Write_Com(0x0030); Lcd_Write_Data(0x0000);
Lcd_Write_Com(0x0031); Lcd_Write_Data((0x07<<8)+0x07);
Lcd_Write_Com(0x0032); Lcd_Write_Data((0x03<<8)+0x07);
Lcd_Write_Com(0x0035); Lcd_Write_Data((0x02<<8)+0x00);
Lcd_Write_Com(0x0036); Lcd_Write_Data(0x0008);//0207
Lcd_Write_Com(0x0037); Lcd_Write_Data(0x0004);//0306
Lcd_Write_Com(0x0038); Lcd_Write_Data(0x0000);//0102
Lcd_Write_Com(0x0039); Lcd_Write_Data((0x07<<8)+0x07);//0707
Lcd_Write_Com(0x003C); Lcd_Write_Data(0x0002);//0702
Lcd_Write_Com(0x003D); Lcd_Write_Data((0x1D<<8)+0x04);//1604

//------------------ Set GRAM area ---------------//
Lcd_Write_Com(0x0050); Lcd_Write_Data(0x0000); // Horizontal GRAM Start Address
Lcd_Write_Com(0x0051); Lcd_Write_Data(0x00EF); // Horizontal GRAM End Address
Lcd_Write_Com(0x0052); Lcd_Write_Data(0x0000); // Vertical GRAM Start Address
Lcd_Write_Com(0x0053); Lcd_Write_Data((0x01<<8)+0x3F); // Vertical GRAM Start Address
Lcd_Write_Com(0x0060); Lcd_Write_Data((0xA7<<8)+0x00); // Gate Scan Line
Lcd_Write_Com(0x0061); Lcd_Write_Data(0x0001); // NDL,VLE, REV
Lcd_Write_Com(0x006A); Lcd_Write_Data(0x0000); // set scrolling line
//-------------- Partial Display Control ---------//
Lcd_Write_Com(0x0080); Lcd_Write_Data(0x0000);
Lcd_Write_Com(0x0081); Lcd_Write_Data(0x0000);
Lcd_Write_Com(0x0082); Lcd_Write_Data(0x0000);
Lcd_Write_Com(0x0083); Lcd_Write_Data(0x0000);
Lcd_Write_Com(0x0084); Lcd_Write_Data(0x0000);
Lcd_Write_Com(0x0085); Lcd_Write_Data(0x0000);
//-------------- Panel Control -------------------//
Lcd_Write_Com(0x0090); Lcd_Write_Data(0x0010);
Lcd_Write_Com(0x0092); Lcd_Write_Data((0x06<<8)+0x00);
Lcd_Write_Com(0x0007); Lcd_Write_Data((0x01<<8)+0x33); // 262K color and display ON

Address_set(0,0,240,320);
//IOWR_ALTERA_AVALON_PIO_DATA(CS_BASE, 1); //关闭片选使能

}

int main(void)
{
//int i,j;
Lcd_Init();
Pant(0x0000);
while(1){
   Pant(0xf800); //红色
   Draw_Point(120,100,0xf800);
   Draw_Point(120,120,0x001f);
   Draw_Point(120,140,0xfff0);
   Draw_Point(120,160,0xffff);

   Draw_Point(220,100,Get_Point(120,100));
   Draw_Point(220,120,Get_Point(120,120));
   Draw_Point(220,140,Get_Point(120,140));
   Draw_Point(220,160,Get_Point(120,160));
   delayms(2000);
   Pant(0X07E0); //绿色
   Draw_Point(120,100,0xf800);
   Draw_Point(120,120,0x001f);
   Draw_Point(120,140,0xfff0);
   Draw_Point(120,160,0xffff);

   Draw_Point(220,100,Get_Point(120,100));
   Draw_Point(220,120,Get_Point(120,120));
   Draw_Point(220,140,Get_Point(120,140));
   Draw_Point(220,160,Get_Point(120,160));
   delayms(2000);
   Pant(0x001f); //蓝色
   Draw_Point(120,100,0xf800);
   Draw_Point(120,120,0x001f);
   Draw_Point(120,140,0xfff0);
   Draw_Point(120,160,0xffff);

   Draw_Point(220,100,Get_Point(120,100));
   Draw_Point(220,120,Get_Point(120,120));
   Draw_Point(220,140,Get_Point(120,140));
   Draw_Point(220,160,Get_Point(120,160));
   delayms(2000);}
/*
   Draw_Point(120,100,0xf800);
   Draw_Point(120,120,0x001f);
   Draw_Point(120,140,0xfff0);
   Draw_Point(120,160,0xffff);

   Draw_Point(220,100,Get_Point(120,100));
   Draw_Point(220,120,Get_Point(120,120));
   Draw_Point(220,140,Get_Point(120,140));
   Draw_Point(220,160,Get_Point(120,160));
*/
return 0;
}

现在我这么写了，可以读出数据了。不知道代码能否简化（get_point函数是我胡乱写的），怎样能加快读写速度吗？

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ILI9325,能读取一个像素点的颜色吗？