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hzeller / rpi-rgb-led-matrix

Controlling up to three chains of 64x64, 32x32, 16x32 or similar RGB LED displays using Raspberry Pi GPIO
GNU General Public License v2.0
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Provide a way to power the matrix off temporarily #1047

Open amantalion opened 4 years ago

amantalion commented 4 years ago

Hi,

Please could you tell me shat is the proper way to power the matrix temporarily off? I found this code in the RGBMatrix for doing that:

if (updater_) {
    updater_->Stop();
    updater_->WaitStopped();
}
delete updater_;

// Make sure LEDs are off.
active_->Clear();
if (io_) active_->framebuffer()->DumpToMatrix(io_, 0);

Then, to power the matrix back on I would use:

matrix->StartRefresh();
matrix->SwapOnVSync(&frameCanvas);

Is that correct? If so, then shall I create a pull request to add the function for powering the matrix off?

Thank you!

hzeller commented 4 years ago

Is there a particular reason you'd like to do that ?

jeremywww commented 3 years ago

To stop the CPU usage when the display would otherwise be blank for an extended period of time.