Help with P10 outdoor panel

[CDR114]

I have the software working with some indoor P10 panels, but the project I am working on needs the brightness of the P10 16 x 32 outdoor panels. Unfortunately I haven't had any success in getting the ones I have to work. Connecting one panel the best result I get is using the command sudo ./demo -D3 --led-rows=16 --led-cols=32 --led-multiplexing=3

the results are:

The picture may look strange because the outdoor panel is lying on the indoor panels. I am using the Holiday-Lights interface Pi-Matrix board.

Any suggestions?

Can anyone provide a source for a P10 16 x 32 panel that works?

[angelogoncalve]

Try this options:

sudo ./demo -D3 --led-rows=16 --led-cols=32 --led-multiplexing=1 --led-row-addr-type=0

sudo ./demo -D3 --led-rows=16 --led-cols=32 --led-multiplexing=4 --led-row-addr-type=0

sudo ./demo -D3 --led-rows=16 --led-cols=32 --led-multiplexing=4 --led-row-addr-type=2

sudo ./demo -D3 --led-rows=16 --led-cols=32 --led-multiplexing=5 --led-row-addr-type=0

sudo ./demo -D3 --led-rows=16 --led-cols=32 --led-multiplexing=5 --led-row-addr-type=2

[CDR114]

I have already tried all the variations of multiplexing and address types and --led-multiplexing=3 and --led-addr-type=0 is the closest to what it should be. I am going to try individual pixel addressing and see what I get. But after that I am not sure what to do with that information.

[angelogoncalve]

Try the last option:

sudo ./demo -D3 --led-rows=16 --led-cols=32 --led-multiplexing=7 --led-row-addr-type=0

sudo ./demo -D3 --led-rows=16 --led-cols=32 --led-multiplexing=7 --led-row-addr-type=2

multiplex-mappers.zip

[CDR114]

That did not work. I ran the Pixel Test program with no multiplexing and default address type and for each pixel addressed I get 4 pixels lite on the panel!

I am wondering if I have an addressing problem with the Hub75 connector. My panels have:

R1, B1, R2, B2, A, (blank), CLK, OE down one side G1, (blank), G2, (blank), B, (blank), STB, (blank) down the other side

The panel uses ICN2028AP Serial Interfaced LED Driver IC's and SM74HC1381 3 to 1 Line Decoder, Multiplexer, Inverting IC and SM245TS display driver IC

The run section of the class added to Demo (12)

for (int y = 0; y < 16; y++) { for (int x = 0; x < 32; x++) { // Show where we are on screen. Comment out if using fast animation printf("Pixel at (%d, %d)\n", x, y); // Draw a pixel at (x, y) where red = 66%, green = 33% and blue = 100% brightness.
canvas()->SetPixel(x, y, 170, 85, 255);
// Wait a bit... (increase the sleep time if mapping, decrease for testing). usleep(1 100 1000); // 1x100x1000 = 100,000 microseconds or 0.1 seconds. // Blank this pixel before drawing the next one if mapping, comment out if filling screen
canvas()->SetPixel(x, y, 0, 0, 0);
}

I just tried connecting the panels directly, eliminating the Pi Matrix board and I get the same results, 4 LEDs lit per pixel addressed.

[CDR114]

I just determined from the number of ICN2028AP LED driver IC's that these panels are 1/2 scan versus the 1/4 scan that I ordered.

[angelogoncalve]

See the issue https://github.com/hzeller/rpi-rgb-led-matrix/issues/592.

[angelogoncalve]

Try the option:

sudo ./demo -D3 --led-rows=16 --led-cols=32 --led-multiplexing=7 --led-row-addr-type=0

[nictruong]

@CDR114 I am getting the EXACT same output for sudo ./demo -D3 --led-rows=16 --led-cols=32 --led-multiplexing=3. Have you found a solution to your problem yet?

[CDR114]

I have tried the solution in #592 and I get 8 rows to display properly but get "Error in PixelMapper" for rows 0 through 3 and 8 through 16. You will notice that 4 rows do not have any error, but at 1/2 scan that equates to 8 displayed rows. Hopefully Alvaro, who developed the solution, can help. I will try to post a picture tomorrow (It is late and need some sleep).

[nictruong]

@CDR114, there has been a new commit to the project, --led-multiplexing=7 that has solved all my problems. Hopefuly it will solve yours.

[CDR114]

The solution in #592 Understanding Multiplexing solved my problem after identifying a defective P10 display panel