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Hello,

I succeeded, BT 816 START without problems.
I activated PWM DISPLAY, PCLK and GPIO after writing the first display list.
Now everything is OK, thanks for everything.

Best regards,


Sandu Onica

Hello,
Thank you for your advice.
I don't understand why 1 from 10 start up the touchscreen fails and another 9 times working good.

Best regards,

Sandu Onica

4.9.3.4 POWERDOWN state
In POWERDOWN state, the clock oscillator, the PLL and the system clock applied to the BT815/6 core is disabled. The core engines are powered down while the SPI interface for host commands remains functional. All register contents are lost and reset to default when the chip is next switched on. The internal regulator remains on.

I POSTED FROM   BT81X (815/6) Advanced Embedded Video Engine Datasheet
Version 1.0

Best regards,

SANDU ONICA

HELLO!

When start corectly ,ofcourse  this registers are tested.
It's posible when are blocked ,this registers have another values?
Power regulator start different for BT816.
This regulator run in Power Down state, for FT800  are disabled and can be restart software.
I"m afraid that power regulator it's problem.
I used RIVERDI 3,5 " .

Best regards,

Sandu Onica

HELLO,
I used in the past FT800 and I had not problem with this.
BT 816 don't start all the times, sometimes it start with white screen, I checked, for example in this situation PWM control working .
I tried with CPU RESET,COLDSTART,ETC.BT 816 ARE BLOCKED.
Where is the problem?

Best regard,

Sandu Onica