Update to include S3 support.

Refactor tonnes of code. Double buffering not yet fully tested. PSRAM support doesn't work at all - garbled mess.

Enable in platformIO using:
build_flags =
	-DSPIRAM_FRAMEBUFFER=1

1 files changed, 94 insertions, 0 deletions

diff --git a/src/ESP32-HUB75-MatrixPanel-leddrivers.cpp b/src/ESP32-HUB75-MatrixPanel-leddrivers.cpp
new file mode 100644
index 0000000..bb482a2
--- /dev/null
+++ b/src/ESP32-HUB75-MatrixPanel-leddrivers.cpp
@@ -0,0 +1,94 @@
+/*
+  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
+}
\ No newline at end of file