led matrix flicking. about rpi-rgb-led-matrix HOT 7 CLOSED

Depending on the speed of the LED panels, it might help to define RGB_SLOWDOWN_GPIO (see lib/Makefile)

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We also tried to use RGB_SLOWDOWN_GPIO and Active-3 adapter.
But it's not work. Please check the attached video.
Let us know the another solution.

https://www.youtube.com/watch?v=g7Ul_Z-y7C8

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On 1 September 2015 at 21:40, k54821 [email protected] wrote:

We also tried to use RGB_SLOWDOWN_GPIO and Active-3 adapter.
But it's not work. Please check the attached video.
Let us know the another solution.

https://www.youtube.com/watch?v=g7Ul_Z-y7C8

Ha, that literally looks like 'Heartblead'.

So looks like these panels still can't deal with the speed, and maybe you
need to add more 'slowdownness'
in line 47 and 56 of this file:

https://github.com/hzeller/rpi-rgb-led-matrix/blob/master/include/gpio.h#L47

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First, thank you for your help,
But I can't understend what the 'slowdownness' mean is.
Could you give me an Example?

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I mean to repeat another line, e.g.
#ifdef RGB_SLOWDOWN_GPIO
*gpio_set_bits_ = value;
*gpio_set_bits_ = value; // one more.
#endif
Same for the clr bits.

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Thank you for your help,
It's doing nicely, perfact~! Thank you.

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I have now, in commit 246beca, added a way to further slow down without manually modifying the code.
Instead of -DRGB_SLOWDOWN_GPIO, you can say -DRGB_SLOWDOWN_GPIO=2 now, and it will add the one additional slowdown.

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