panel P6 32x32 outdoor 1/8 scan rate - mapping pixels wrigth transform

[angelogoncalve]

Hello people. I nedd to have the wrigth transform for mapping pixels a panel P6 32x32 outdoor 1/8 scan rate.

I think I need to change trasnsformer.cc file in the UArrangementTransformer but I do not get the wright transformation for the pixels.

In below is the transformation for a panel 16x32 with a scan rate 1:4:

void UArrangementTransformer::TransformCanvas::SetPixel( int x, int y, uint8_t red, uint8_t green, uint8_t blue) { int new_x = 0; int new_y = 0; if (y < 4 || (y > 7 && y < 12)) { new_x = (x -1) + (24 ((x / 8) + 1)) - 17; new_y = y; } else { new_x = x + (8 * ((x / 8) + 1)); newy = y - 4; } delegatee->SetPixel(new_x, new_y, red, green, blue);

/ if (x < 0 || x >= width || y < 0 || y >= height) return; const int slab_height = 2panelheight; // one folded u-shape const int base_y = (y / slab_height) panelheight; y %= slab_height; if (y < panelheight) { x += delegatee->width() / 2; } else { x = width - x - 1; y = slabheight - y - 1; } delegatee->SetPixel(x, base_y + y, red, green, blue); / }

Can anybody help me please to finish the project for the shchool.

Thank you for your atention.

[darknessii]

hello guys, here I have an ugly code created for my p6 32x32 1/8 panel. it works for me. however, it only works for one --led-parallel=1 and at least 4 panels.

void UArrangementTransformer::TransformCanvas::SetPixel( int x, int y, uint8_t red, uint8_t green, uint8_t blue) {

// Panel SMD3535 RGB OS-P6-32x32-8S

int new_x = 0; int new_y = 0;

if (y <= 7) { new_x = ((x / 16) 32) + (x % 16); if ((y & 8) == 1) { new_x += 16; } new_y = ((y / 16) 8) + (y % 8); }else { if ((y >= 16) && (y <= 23)) { new_x = ((x / 16) 32) + (x % 16); if ((y & 8) == 1) { new_x += 16; } new_y = ((y / 16) 8) + (y % 8); }else { new_x = ((x / 16) 32) + (x % 16); y -= 8; if ((y & 8) == 0) { new_x += 16; } new_y = ((y / 16) 8) + (y % 8); } } delegatee_->SetPixel(new_x, new_y, red, green, blue); }

Example with 2 Panel: (while :; do date +%T ; sleep 0.2 ; done) | sudo ./text-example -f ../fonts/8x13B.bdf -y8 -C140,0,0 --led-rows=16 --led-chain=4 --led-parallel=1 --led-slowdown-gpio=2 --led-pwm-lsb-nanoseconds=200 --led-no-hardware-pulse

[darknessii]

Example with 4x 32x32 Panel U-arrangement (64x64) ./demo -D 0 --led-rows=16 --led-chain=8 --led-parallel=1 --led-slowdown-gpio=2 --led-pwm-lsb-nanoseconds=80 --led-no-hardware-pulse -L

[angelogoncalve]

Hi the transformer for 32x32 panel with scan rate 1:8 can be these ones:

// / P10outdoor Transformer Canvas / // class P10outdoorTransformer::TransformCanvas : public Canvas { public: TransformCanvas() : delegatee_(NULL) {}

void SetDelegatee(Canvas* delegatee);

virtual void Clear(); virtual void Fill(uint8_t red, uint8_t green, uint8_t blue); virtual int width() const; virtual int height() const; virtual void SetPixel(int x, int y, uint8_t red, uint8_t green, uint8_t blue);

private: Canvas *delegatee_; };

void P10outdoorTransformer::TransformCanvas::SetDelegatee(Canvas* delegatee) { delegatee_ = delegatee; }

void P10outdoorTransformer::TransformCanvas::Clear() { delegatee_->Clear(); }

void P10outdoorTransformer::TransformCanvas::Fill(uint8_t red, uint8_t green, uint8t blue) { delegatee->Fill(red, green, blue); }

int P10outdoorTransformer::TransformCanvas::width() const { return delegatee_->width() / 2; }

int P10outdoorTransformer::TransformCanvas::height() const { return delegatee_->height() * 2; }

void P10outdoorTransformer::TransformCanvas::SetPixel(int x, int y, uint8_t red, uint8_t green, uint8_t blue) { if (x < 0 || x >= width() || y < 0 || y >= height()) return; /int new_x, new_y; new_x = ((x / 32) 64) + (x % 32); if ((y & 8) == 0) { new_x += 32; }
new_y = ((y / 16) 8) + (y % 8);/ //fprintf(stdout, "value of new_x new_y :: %d %d\n ", new_x, new_y);

/int odd8_block =(((y % 16) / 8) +1) % 2; //to know if the pixel is in an odd 8pixel row int num_mod_x = (x / 32); //num of daisy chainned modules int new_x = (x + 32num_mod_x + 32odd8_block); int new_y = (y % 8) + 8 ( y / 16);*/

//The following code converts a 32x32 matrix into a 64x16 matrix for proper display. /int new_x = x; int new_y = y; if (y < 8) new_x = x + 32; else if (y < 16) new_y = y - 8; else if (y < 24) { new_x = x + 32; new_y = y - 8; } else new_y = y - 16;/

//Panel SMD3535 RGB OS-P6-32x32-8S int new_x = 0; int new_y = 0; if (y <= 7) { new_x = ((x / 32) 64) + (x % 32); if ((y & 8) == 0) { new_x += 32; } new_y = ((y / 16) 8) + (y % 8); }else { new_x = ((x / 32) 64) + (x % 32); //y -= 8; if ((y & 8) == 0) { new_x += 32; } new_y = ((y / 16) 8) + (y % 8); } delegatee_->SetPixel(new_x, new_y, red, green, blue); }

// / P10outdoor Transformer / // P10outdoorTransformer::P10outdoorTransformer() : canvas_(new TransformCanvas()) { }

P10outdoorTransformer::~P10outdoorTransformer() { delete canvas_; }

Canvas P10outdoorTransformer::Transform(Canvas output) { assert(output != NULL);

canvas->SetDelegatee(output); return canvas; }

./demo -D 0 --led-rows=16 --led-chain=2 * number of panels --led-parallel=1

[angelogoncalve]

The correct transformer that you send my friend for 32x32 panel with scan rate 1:8 is this:

//Panel SMD3535 RGB OS-P6-32x32-8S int new_x = 0; int new_y = 0; if (y <= 7) { new_x = ((x / 32) 64) + (x % 32); if ((y & 8) == 0) { new_x += 32; } new_y = ((y / 16) 8) + (y % 8); } else { if ((y >= 16) && (y <= 23)) { new_x = ((x / 32) 64) + (x % 32); new_y = y - 8; if ((y & 8) == 0) { new_x += 32; } new_y = ((y / 16) 8) + (y % 8); } else { new_x = ((x / 32) 64) + (x % 32); if ((y & 8) == 0) { new_x += 32; } new_y = ((y / 16) 8) + (y % 8); } } delegatee_->SetPixel(new_x, new_y, red, green, blue);

[hzeller]

Please check out the new option --led-multiplexing https://github.com/hzeller/rpi-rgb-led-matrix#multiplexing It does the mapping built into the library (and can also be used from Python.) (You need to do a fresh checkout and compile, this just went in).

[lukasmalkmus]

Can confirm. The new multiplexing options fixed my issue with the same display. I'm not talking in behalf of the issue author but I think this can be closed. @hzeller @angelogoncalve

[darknessii]

The --led-multiplexing option does not work for me.

Only my Transfomset works fine. i did some optimisation.

void UArrangementTransformer::TransformCanvas::SetPixel( int x, int y, uint8_t red, uint8_t green, uint8_t blue) {

int new_x = 0; int new_y = 0;

//Panel SMD3535 RGB OS-P6-32x32-8S if ((y <= 7) || ((y >= 16) && (y <= 23)) || ((y >= 32) && (y <= 39)) || ((y >= 48) && (y <= 55))) { new_x = ((x / 16) 32) + (x % 16); if ((y & 8) == 1) { new_x += 16; } new_y = ((y / 16) 8) + (y % 8); }else { new_x = ((x / 16) 32) + (x % 16); y -= 8; if ((y & 8) == 0) { new_x += 16; } new_y = ((y / 16) 8) + (y % 8); } delegatee_->SetPixel(new_x, new_y, red, green, blue); }

sudo ./examples-api-use/demo -D 3 --led-rows=16 --led-chain=4 --led-parallel=2 --led-slowdown-gpio=2 --led-pwm-lsb-nanoseconds=80 --led-no-hardware-pulse

Not working..... --led-multiplexing=

sudo ./examples-api-use/demo -D 3 --led-rows=16 --led-chain=4 --led-parallel=2 --led-slowdown-gpio=2 --led-pwm-lsb-nanoseconds=80 --led-no-hardware-pulse --led-multiplexing=0

sudo ./examples-api-use/demo -D 3 --led-rows=16 --led-chain=4 --led-parallel=2 --led-slowdown-gpio=2 --led-pwm-lsb-nanoseconds=80 --led-no-hardware-pulse --led-multiplexing=1

sudo ./examples-api-use/demo -D 3 --led-rows=16 --led-chain=4 --led-parallel=2 --led-slowdown-gpio=2 --led-pwm-lsb-nanoseconds=80 --led-no-hardware-pulse --led-multiplexing=2

sudo ./examples-api-use/demo -D 3 --led-rows=16 --led-chain=4 --led-parallel=2 --led-slowdown-gpio=2 --led-pwm-lsb-nanoseconds=80 --led-no-hardware-pulse --led-multiplexing=3

sudo ./examples-api-use/demo -D 3 --led-rows=16 --led-chain=4 --led-parallel=2 --led-slowdown-gpio=2 --led-pwm-lsb-nanoseconds=80 --led-no-hardware-pulse --led-multiplexing=4

Also the option --led-row-addr-type dose not work.

But thanks for the transform Set Option. this works fine.

[hzeller]

So if the existing --led-multiplexing= values 0 .. 4 don't work, but you have figured out a transformer mapping for you, it would be great if you could send a pull request that adds these to lib/multiplex-transformers.cc - there might be other people that have the same panel so would be greatful for your contribution.

[hzeller]

@darknessii I guess this can be closed now as this was the transformer you were working on ?

[angelogoncalve]

Hello Dear Henner.

The --led-multiplexing=6 works fine. Thank you my friend for your help.

[hzeller]

Thank @darknessii who implemented this mapper, not me :)