How to connect a single Monochrome P10 for Pico

[donly]

I just follow the wiki Connections Monochrome and use Arduino Pico to follow the pin connections in the example dmd_monochrome. When I use the connection shown in the diagram below and upload the code, the LED screen does not work and remains black.

SO, where is the problem please?

[board707]

Hi! The pins on your picture is not labeled, so it making it difficult to understand the exact pin mappings. Could you please show a pin definition part of your code?

You can see a tested variant of RP2040 pins in the examples/STM32F4_RP2040/dmd_monochrome/dmd_monochrome.ino example:

#define DMD_PIN_A 1
#define DMD_PIN_B 2
#define DMD_PIN_nOE 14
#define DMD_PIN_SCLK 15

// These pins must be consecutive in ascending order
uint8_t pins[] = { 6, 7, 8 };  // CLK , row1, row 2

[donly]

Yes, I use the same code with you. And the pins I used is same with the first picture.

Which two do pin1 and pin2 refer to in this picture https://github.com/board707/DMD_STM32/raw/old-V1/.github/hub12.svg

[board707]

Which two do pin1 and pin2 refer to

The pin 1 & 2 are refer to A & B signals. I will assemble a test circuit and check this example with Raspberry Pico again.

[donly]

I am so sorry, what I want to ask is 7, 8 pins (row1, row2) refer to which pins.

[board707]

Hi The pins 7, 8... are related to panels configuration with many horizontal rows, as described in Wiki . Each pin is connected to panel R_DATA pin of corespondent's row. If you drive a single panel, you need only one CLK pin and one R_DATA pin.

I just check the library example, it works fine for me with pins, listed below:

#define DMD_PIN_A 1
#define DMD_PIN_B 2
#define DMD_PIN_nOE 14
#define DMD_PIN_SCLK 15

// These pins must be consecutive in ascending order
uint8_t pins[] = { 6, 7 };  // CLK , R_DATA

Also please make sure the line #define DMD_PARA at the beginning of the sketch (line 8) is not commented out.

[donly]

// These pins must be consecutive in ascending order
uint8_t pins[] = { 6, 7 };  // CLK , R_DATA

This is the key, now it works. Thank you @board707, have a nice weekend.