Does anyone have experience with the HRL0P4-10S-1921V3.2 modules in couple the SmartMatrix library?

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Does anyone have experience with the HRL0P4-10S-1921V3.2 modules in couple the SmartMatrix library?

Module - P4, 80x40, 320x160mm, fullcolor, outdoor, IC16208S/DP32020A decoding.
Controller - ESP32 with latch.

Pixel mapping known, but can’t get correct picture.

I think problem is in DP32020A, which have different control inputs from commonly used 138 decoders. It uses serial interface - DIN, DCK, RCK, DOUT (data, clock, output register latch, data for next chip), instead of A0, A1 and A2 for decoder-multiplexers.

DP32020A - is shift register, therefore it needs different control. Whether SmartMatrix library supports such type ICs in role of decoder.
32020

If someone knows this, please help.

Thanks in advance

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Sorry, more complex address devices like that IC aren’t supported by SmartMatrix. They may be supported by the hzeller raspberry pi project

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Thanks for the response

I found the solution myself.

I used ATMEGA88 microcontroller to convert “A”, “B”, “C”, “D” address signals to DIN (on C line) and DCK (on A line) signals for 32020 chip.

ATMEGA88 runs on an internal RC oscillator, so no external components are required.

A very simple code was sufficient for this purpose. On port C, which is configured as input, we read “A”, “B”, “C”, “D” address. “C_din” and “A_dck” are pins of D port configured as output. “B_rck” is not used and always in zero state.
Capture1

Although it is quite possible to use an Arduino nano.

The image is completely clear and stable.

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Wow, what a great idea! I never considered implementing address translation with a little micro. I’ll add this solution to the wiki when I have time to let others know SmartMatrix library can (with a little help) work with more types of panels

1 Like
5

Hi
Work with shift register multiplexer is a very simple, the code is literally a couple the lines:

        digitalWrite(pin_DMD_B, HIGH);
		digitalWrite(pin_DMD_C, (curr_row == 0)); // Shift out 1 for line 0, 0 otherwise
		digitalWrite(pin_DMD_A, HIGH); // Clock out this bit
		digitalWrite(pin_DMD_A, LOW);
		digitalWrite(pin_DMD_B, LOW);

The code - put 1 in the register at row 0 and shift it one bit at every next row.

See lines 926-936 at file: