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/*
Various LED Driver chips might need some specific code for initialisation/control logic
*/
#ifdef ARDUINO_ARCH_ESP32
#include <Arduino.h>
#else
#include <driver/gpio.h>
#define LOW 0
#define HIGH 1
#endif
#include "ESP32-HUB75-MatrixPanel-I2S-DMA.h"
#define CLK_PULSE gpio_set_level((gpio_num_t) _cfg.gpio.clk, HIGH); gpio_set_level((gpio_num_t) _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) {
ESP_LOGI("LEDdrivers", "MatrixPanel_I2S_DMA - initializing FM6124 driver...");
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}){
gpio_set_direction((gpio_num_t) _pin, GPIO_MODE_OUTPUT);
gpio_set_level((gpio_num_t) _pin, LOW);
}
gpio_set_level((gpio_num_t) _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})
gpio_set_level((gpio_num_t) _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
gpio_set_level((gpio_num_t) _cfg.gpio.lat, HIGH);
}
CLK_PULSE
}
// drop the latch and save data to the REG1 all over the FM6124 chips
gpio_set_level((gpio_num_t) _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})
gpio_set_level((gpio_num_t) _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
gpio_set_level((gpio_num_t) _cfg.gpio.lat, HIGH);
}
CLK_PULSE
}
// drop the latch and save data to the REG1 all over the FM6126 chips
gpio_set_level((gpio_num_t) _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})
gpio_set_level((gpio_num_t) _pin, LOW);
for (int l = 0; l < PIXELS_PER_ROW; ++l){
CLK_PULSE
}
gpio_set_level((gpio_num_t) _cfg.gpio.lat, HIGH);
CLK_PULSE
gpio_set_level((gpio_num_t) _cfg.gpio.lat, LOW);
gpio_set_level((gpio_num_t) _cfg.gpio.oe, LOW); // Enable Display
CLK_PULSE
}
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