How to know driver led

[mjmokhtar]

/*
Various LED Driver chips might need some specific code for initialisation/control logic

*/

#include <Arduino.h>
#include "ESP32-HUB75-MatrixPanel-I2S-DMA.h"

#define CLK_PULSE digitalWrite(_cfg.gpio.clk, HIGH); digitalWrite(_cfg.gpio.clk, LOW);

/**

• @brief - pre-init procedures for specific led-drivers
• this method is called before DMA/I2S setup while GPIOs
• aint yet assigned for DMA operation

/
void MatrixPanel_I2S_DMA::shiftDriver(const HUB75_I2S_CFG& _cfg){
switch (_cfg.driver){
case HUB75_I2S_CFG::ICN2038S:
case HUB75_I2S_CFG::FM6124:
case HUB75_I2S_CFG::FM6126A:
fm6124init(_cfg);
break;
case HUB75_I2S_CFG::MBI5124:
/ MBI5124 chips must be clocked with positive-edge, since it's LAT signal
* resets on clock's rising edge while high
* https://github.com/mrfaptastic/ESP32-HUB75-MatrixPanel-I2S-DMA/files/5952216/5a542453754da.pdf
*/
m_cfg.clkphase=true;
break;
case HUB75_I2S_CFG::SHIFTREG:
default:
break;
}
}

void MatrixPanel_I2S_DMA::fm6124init(const HUB75_I2S_CFG& _cfg){
#if SERIAL_DEBUG
Serial.println( F("MatrixPanel_I2S_DMA - initializing FM6124 driver..."));
#endif
bool REG1[16] = {0,0,0,0,0, 1,1,1,1,1,1, 0,0,0,0,0}; // this sets global matrix brightness power
bool REG2[16] = {0,0,0,0,0, 0,0,0,0,1,0, 0,0,0,0,0}; // a single bit enables the matrix output

for (uint8_t _pin:{_cfg.gpio.r1, _cfg.gpio.r2, _cfg.gpio.g1, _cfg.gpio.g2, _cfg.gpio.b1, _cfg.gpio.b2, _cfg.gpio.clk, _cfg.gpio.lat, _cfg.gpio.oe}){
    pinMode(_pin, OUTPUT);
    digitalWrite(_pin, LOW);
}

digitalWrite(_cfg.gpio.oe, HIGH); // Disable Display

// Send Data to control register REG1
// this sets the matrix brightness actually
for (int l = 0; l < PIXELS_PER_ROW; l++){
    for (uint8_t _pin:{_cfg.gpio.r1, _cfg.gpio.r2, _cfg.gpio.g1, _cfg.gpio.g2, _cfg.gpio.b1, _cfg.gpio.b2})
      digitalWrite(_pin, REG1[l%16]);   // we have 16 bits shifters and write the same value all over the matrix array

    if (l > PIXELS_PER_ROW - 12){         // pull the latch 11 clocks before the end of matrix so that REG1 starts counting to save the value
        digitalWrite(_cfg.gpio.lat, HIGH);
    }
    CLK_PULSE
}

// drop the latch and save data to the REG1 all over the FM6124 chips
digitalWrite(_cfg.gpio.lat, LOW);

// Send Data to control register REG2 (enable LED output)
for (int l = 0; l < PIXELS_PER_ROW; l++){
    for (uint8_t _pin:{_cfg.gpio.r1, _cfg.gpio.r2, _cfg.gpio.g1, _cfg.gpio.g2, _cfg.gpio.b1, _cfg.gpio.b2})
      digitalWrite(_pin, REG2[l%16]);   // we have 16 bits shifters and we write the same value all over the matrix array

    if (l > PIXELS_PER_ROW - 13){       // pull the latch 12 clocks before the end of matrix so that reg2 stars counting to save the value
        digitalWrite(_cfg.gpio.lat, HIGH);
    }
    CLK_PULSE
}

// drop the latch and save data to the REG1 all over the FM6126 chips
digitalWrite(_cfg.gpio.lat, LOW);

// blank data regs to keep matrix clear after manipulations
for (uint8_t _pin:{_cfg.gpio.r1, _cfg.gpio.r2, _cfg.gpio.g1, _cfg.gpio.g2, _cfg.gpio.b1, _cfg.gpio.b2})
   digitalWrite(_pin, LOW);

for (int l = 0; l < PIXELS_PER_ROW; ++l){
    CLK_PULSE
}

digitalWrite(_cfg.gpio.lat, HIGH);
CLK_PULSE
digitalWrite(_cfg.gpio.lat, LOW);
digitalWrite(_cfg.gpio.oe, LOW); // Enable Display
CLK_PULSE

}

this I got from your source
can you explain to me how to change that code for another specification led matrix (p8 or p10) cause the driver is different I gues

i still stuck until today #540

[board707]

p8 and p10 is not a specifications, it is just a distance between LEDs in mm
Read the driver type written on the chips

[mjmokhtar]

i see
but how we know about driver led ?
i ve check and i change it, and it doesn't working

[board707]

What are the chips on your panel?

[mjmokhtar]

icn2088p
i dont know what bit and configuration code it same or not
but I ve use panel p8 and 1/4 s

thanks Mr

[board707]

Sorry, I know nothing about this driver .
Are you sure that is not a 2038 ?

[mjmokhtar]

pardon me mr
actually is 20238p