ESP32 DMA RMP

Hardware Install Guide

• Supported boards are devkitc and pico V4: https://www.electrodragon.com/w/ESP32_Boards

• 

  Pin definition

• 

  Schematic

Plug in the ESP32 devkitc or PICO board

• the most inside 2 rows of 20 pin are for the socket of the PICO board
• the medium 2 rows of 19 pins are for the socket of the DEVKITC board
• the most outside 2 rows of 19 pins are the extra lead outs for the DEVKITC board, no use

Install to the Panel

• Please check the HUB75 direction in attached image, the gap on the board's hub75 should match to the gap on the panel's hub75
• Interface HUB75's gap to Panel HUB75's gsp

Note

• Double check if the board plug into the socket well or not. Otherwise it won't work.

Software ESP32 DMA Demo Code Setup

• Demo code github: https://github.com/mrfaptastic/ESP32-HUB75-MatrixPanel-I2S-DMA
• Pin definition based on file: ESP32-HUB75-MatrixPanel-I2S-DMA.h

RGB1 and RGB2

#define R1_PIN_DEFAULT  25
#define G1_PIN_DEFAULT  26
#define B1_PIN_DEFAULT  27

#define R2_PIN_DEFAULT  14
#define G2_PIN_DEFAULT  12
#define B2_PIN_DEFAULT  13

A / B / C / D / E

#define A_PIN_DEFAULT   23
#define B_PIN_DEFAULT   19
#define C_PIN_DEFAULT   5
#define D_PIN_DEFAULT   17 // via jumper to PICO IO22, for PICO please change to IO22
#define E_PIN_DEFAULT   -1 // IMPORTANT: Change to a valid pin if using a 64x64px panel.

LAT / OE / CLK

#define LAT_PIN_DEFAULT 4
#define OE_PIN_DEFAULT  15
#define CLK_PIN_DEFAULT 16 // via jumper to PICO IO21, for PICO please change to IO21

Pin D and CLK

Pre-connected

• Pin D pre-connected to ESP32 IO17 and PICO pin IO22
• Pin CLK pre-connected to ESP32 IO16 and PICO IO21

Setup for Line_E

Connect three-way jumpers before to use

• For Devkitc, three-way jumper to IO22 or IO18
• For PICO, three-way jumper to IO10 or IO9

V2 New Features

• Fully support DEVKITC and PICO all pins
• Add LDR sensor port reserved
• Add signal buffer to transfer 5V signal to panel
• Seperated lead out I2C port IO22 IO21
• Seperated lead out PICO extra pins IO9 IO10 IO37 IO38
• Use switch to swap between devkitc and PICO, which only swtich pins CLK and D

PICO CLK = IO32
PICO D = IO33
DEVKITC CLK = IO16
DEVKITC D = IO17

• E line change to IO18