94 lines
3.5 KiB
C++
94 lines
3.5 KiB
C++
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/*
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Various LED Driver chips might need some specific code for initialisation/control logic
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*/
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#include <Arduino.h>
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#include "ESP32-HUB75-MatrixPanel-I2S-DMA.h"
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#define CLK_PULSE digitalWrite(_cfg.gpio.clk, HIGH); digitalWrite(_cfg.gpio.clk, LOW);
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/**
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* @brief - pre-init procedures for specific led-drivers
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* this method is called before DMA/I2S setup while GPIOs
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* aint yet assigned for DMA operation
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*
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*/
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void MatrixPanel_I2S_DMA::shiftDriver(const HUB75_I2S_CFG& _cfg){
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switch (_cfg.driver){
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case HUB75_I2S_CFG::ICN2038S:
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case HUB75_I2S_CFG::FM6124:
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case HUB75_I2S_CFG::FM6126A:
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fm6124init(_cfg);
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break;
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case HUB75_I2S_CFG::MBI5124:
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/* MBI5124 chips must be clocked with positive-edge, since it's LAT signal
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* resets on clock's rising edge while high
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* https://github.com/mrfaptastic/ESP32-HUB75-MatrixPanel-I2S-DMA/files/5952216/5a542453754da.pdf
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*/
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m_cfg.clkphase=true;
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break;
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case HUB75_I2S_CFG::SHIFTREG:
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default:
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break;
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}
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}
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void MatrixPanel_I2S_DMA::fm6124init(const HUB75_I2S_CFG& _cfg){
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#if SERIAL_DEBUG
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Serial.println( F("MatrixPanel_I2S_DMA - initializing FM6124 driver..."));
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#endif
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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
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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
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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}){
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pinMode(_pin, OUTPUT);
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digitalWrite(_pin, LOW);
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}
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digitalWrite(_cfg.gpio.oe, HIGH); // Disable Display
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// Send Data to control register REG1
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// this sets the matrix brightness actually
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for (int l = 0; l < PIXELS_PER_ROW; l++){
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for (uint8_t _pin:{_cfg.gpio.r1, _cfg.gpio.r2, _cfg.gpio.g1, _cfg.gpio.g2, _cfg.gpio.b1, _cfg.gpio.b2})
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digitalWrite(_pin, REG1[l%16]); // we have 16 bits shifters and write the same value all over the matrix array
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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
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digitalWrite(_cfg.gpio.lat, HIGH);
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}
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CLK_PULSE
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}
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// drop the latch and save data to the REG1 all over the FM6124 chips
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digitalWrite(_cfg.gpio.lat, LOW);
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// Send Data to control register REG2 (enable LED output)
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for (int l = 0; l < PIXELS_PER_ROW; l++){
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for (uint8_t _pin:{_cfg.gpio.r1, _cfg.gpio.r2, _cfg.gpio.g1, _cfg.gpio.g2, _cfg.gpio.b1, _cfg.gpio.b2})
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digitalWrite(_pin, REG2[l%16]); // we have 16 bits shifters and we write the same value all over the matrix array
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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
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digitalWrite(_cfg.gpio.lat, HIGH);
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}
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CLK_PULSE
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}
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// drop the latch and save data to the REG1 all over the FM6126 chips
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digitalWrite(_cfg.gpio.lat, LOW);
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// blank data regs to keep matrix clear after manipulations
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for (uint8_t _pin:{_cfg.gpio.r1, _cfg.gpio.r2, _cfg.gpio.g1, _cfg.gpio.g2, _cfg.gpio.b1, _cfg.gpio.b2})
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digitalWrite(_pin, LOW);
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for (int l = 0; l < PIXELS_PER_ROW; ++l){
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CLK_PULSE
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}
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digitalWrite(_cfg.gpio.lat, HIGH);
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CLK_PULSE
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digitalWrite(_cfg.gpio.lat, LOW);
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digitalWrite(_cfg.gpio.oe, LOW); // Enable Display
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CLK_PULSE
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}
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