u16 LCD_ReadPoint(u16 x,u16 y)
{
LCD_SetCursor(x,y);
LCD_ReadReg(0x0022); //读的第一个数据丢弃
opt_delay(2);
return LCD->LCD_RAM;
}
//读取个某点的颜色值
//x,y:坐标
//返回值:此点的颜色
u16 LCD_ReadPoint(u16 x,u16 y)
{
u16 r=0,g=0,b=0;
if(x>=lcddev.width||y>=lcddev.height)return 0; //超过了范围,直接返回
LCD_SetCursor(x,y);
if(lcddev.id==0X9341||lcddev.id==0X6804)LCD_WR_REG(0X2E);//9341/6804 发送读GRAM指令
else LCD_WR_REG(R34); //其他IC发送读GRAM指令
if(lcddev.id==0X9320)opt_delay(2); //FOR 9320,延时2us
if(LCD->LCD_RAM)r=0; //dummy Read
opt_delay(2);
r=LCD->LCD_RAM; //实际坐标颜色
if(lcddev.id==0X9341)//9341要分2次读出
{
opt_delay(2);
b=LCD->LCD_RAM;
g=r&0XFF;//对于9341,第一次读取的是RG的值,R在前,G在后,各占8位
g<<=8;
}else if(lcddev.id==0X6804)r=LCD->LCD_RAM;//6804第二次读取的才是真实值
if(lcddev.id==0X9325||lcddev.id==0X4535||lcddev.id==0X4531||lcddev.id==0X8989||lcddev.id==0XB505)return r;//这几种IC直接返回颜色值
else if(lcddev.id==0X9341)return (((r>>11)<<11)|((g>>10)<<5)|(b>>11)); //ILI9341需要公式转换一下
else return LCD_BGR2RGB(r); //其他IC
