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Messages - EnsAltun

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1
Discussion - Software / FT810 touch calibration problem
« on: February 22, 2022, 02:05:06 PM »
Hi,
I am using FT810 with 7" TFT. But i use it on portrait orientation. But i have a problem with touch orientation. It doesnt happen always but touch orientation of some devices change.  Seems you see TFT screen on portrait orientation but touch system changes to landscape. Thats why you cant use touch screen. Also i calibrate system once after programming process. Flowchart of algorithm is like below;
Run system first time after programming  -> (System goes to calibration mode because calibration values are zero on mcu eeprom) -> Calibrate screen -> read REG_TOUCH_TRANSFORM_X values and save to mcu eeprom -> reboot system
After rebooting system, mcu will see values on eeprom and FT810 wont be calibrated again. I read calibration values and write to REG_TOUCH_TRANSFORM_X again same values. This system was running without problem. But a few devices get this problem. My calibration code is below. Do you have any idea why i have this problem?


ft800memWrite32(RAM_CMD + cmdOffset, (CMD_DLSTART));                                                                                                                                             
cmdOffset = incCMDOffset(cmdOffset, 4);     
ft800memWrite32(RAM_CMD + cmdOffset, CLEAR_COLOR_RGB(0,255,0));
cmdOffset = incCMDOffset(cmdOffset, 4);       
ft800memWrite32(RAM_CMD + cmdOffset, CLEAR(1,1,1));
cmdOffset = incCMDOffset(cmdOffset, 4);       
   
ft800memWrite32(RAM_CMD + cmdOffset, (CMD_SETROTATE));                                                    
cmdOffset = incCMDOffset(cmdOffset, 4);       
ft800memWrite32(RAM_CMD + cmdOffset, (0));   //rotate screen portrait orientation                                 
cmdOffset = incCMDOffset(cmdOffset, 4);       
   
   
ft800memWrite32(RAM_CMD + cmdOffset,CMD_CALIBRATE); // calibrate screen
cmdOffset = incCMDOffset(cmdOffset, 4);   
ft800memWrite32(RAM_CMD + cmdOffset, DISPLAY());
cmdOffset = incCMDOffset(cmdOffset, 4);       
ft800memWrite32(RAM_CMD + cmdOffset, (CMD_SWAP));
cmdOffset = incCMDOffset(cmdOffset, 4);       
ft800memWrite16(REG_CMD_WRITE, (cmdOffset));
do
{
cmdBufferRd = ft800memRead16(REG_CMD_READ);       
cmdBufferWr = ft800memRead16(REG_CMD_WRITE);
}while (cmdBufferWr != cmdBufferRd);

DEVICE_TRANSFORM_A=ft800memRead32(REG_TOUCH_TRANSFORM_A);  // read calibration values
DEVICE_TRANSFORM_B=ft800memRead32(REG_TOUCH_TRANSFORM_B);
DEVICE_TRANSFORM_C=ft800memRead32(REG_TOUCH_TRANSFORM_C);
DEVICE_TRANSFORM_D=ft800memRead32(REG_TOUCH_TRANSFORM_D);
DEVICE_TRANSFORM_E=ft800memRead32(REG_TOUCH_TRANSFORM_E);
DEVICE_TRANSFORM_F=ft800memRead32(REG_TOUCH_TRANSFORM_F);
           
save_eeprom_transform_values();   // save calibration values to eeprom
               



2
Discussion - Software / Re: About using of RAM_G freely
« on: May 10, 2021, 05:11:05 PM »
Thank you for kindly response.
So except using compressed images, i can use whole RAM_G(1MB) freely and fill up with fonts etc, right?  Because i will load a few fonts with various sizes and want to be sure that it wont be problem for me. 

3
Discussion - Software / About using of RAM_G freely
« on: May 10, 2021, 11:20:55 AM »
Hello ,

I am using FT810 and 7" TFT on my project. And sometimes i need a few photos on background. But as you know FT810 has 1024KB RAM_G so new photos and fonts fill RAM_G. Now I am using 540KB(%52 of RAM_G). But is this safe? I mean what happens if i fill up whole RAM_G with photos? Does working of FT810 get slower or does a bug occur on normal operations? I wonder your opinions about this. 

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