HX8357D Backlight

[adamr1]

Hello. I am using the HX8357D 3.5" TFT. I am having trouble using the lite pin. What I am trying to do is have the screen light turn off after inactivity (screen not pressed). My code works, and I am using a digitalWrite LOW to disable the backlight but when I turn it back on, its as if the display hangs and you cannot write to the screen anymore. I have tried both digitalWrite and analogWrite with different pins and I get the same result. I am using a MEGA. Is there anything specific to do after the backlight turns back on?

[adafruit_support_carter]

Post the complete code listing for the sketch you are running.

[adamr1]

I have this:

Code: Select all

void tft_liteToggle(boolean i) {
  if(i) {analogWrite(46,255);} else {analogWrite(46,0);}
}

I've also tried with digitalWrite HIGH/LOW. What I did find is after I do the above, if I do a tft.begin(HX8357D) it works as expected so not sure but that fixes it. And after that, the last screen I had up when I turned the backlight off is there, so its not as if it resets the whole tft, it somehow fixes the problem...

[adafruit_support_carter]

Controlling the backlight should not affect the display. You can use digitalWrite to turn the backlight on/off or analogWrite to PWM to control brightness. Post complete code for the entire sketch.