Fix: allow 80MHz clock speed

src/ESP32-HUB75-MatrixPanel-I2S-DMA.h

@@ -306,7 +306,7 @@ struct HUB75_I2S_CFG
   bool clkphase;
 
   // Minimum refresh / scan rate needs to be configured on start due to LSBMSB_TRANSITION_BIT calculation in allocateDMAmemory()
-  uint8_t min_refresh_rate;
+  uint16_t min_refresh_rate;
 
   // struct constructor
   HUB75_I2S_CFG(
@@ -498,7 +498,6 @@ public:
       vlineDMA(x, y, h, r, g, b);
     else
       hlineDMA(x, y, w, r, g, b);
-
   }
   // rgb888 overload
   virtual inline void drawFastVLine(int16_t x, int16_t y, int16_t h, uint8_t r, uint8_t g, uint8_t b)
@@ -526,7 +525,6 @@ public:
       vlineDMA(x, y, h, r, g, b);
     else
       hlineDMA(x, y, w, r, g, b);
-
   }
   // rgb888 overload
   virtual inline void drawFastHLine(int16_t x, int16_t y, int16_t w, uint8_t r, uint8_t g, uint8_t b)
@@ -550,7 +548,6 @@ public:
 
     transform(x, y, w, h);
     fillRectDMA(x, y, w, h, r, g, b);
-    
   }
   // rgb888 overload
   virtual inline void fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint8_t r, uint8_t g, uint8_t b)
@@ -558,7 +555,6 @@ public:
 
     transform(x, y, w, h);
     fillRectDMA(x, y, w, h, r, g, b);
-    
   }
 #endif
 
@@ -572,8 +568,8 @@ public:
 #endif
 
 #ifdef NO_GFX
-    inline int16_t width() const { return m_cfg.mx_width * m_cfg.chain_length; }
-    inline int16_t height() const { return m_cfg.mx_height; }
+  inline int16_t width() const { return m_cfg.mx_width * m_cfg.chain_length; }
+  inline int16_t height() const { return m_cfg.mx_height; }
 #endif
 
   void drawIcon(int *ico, int16_t x, int16_t y, int16_t cols, int16_t rows);
@@ -603,12 +599,9 @@ public:
 
     dma_bus.flip_dma_output_buffer(back_buffer_id);
 
-	//back_buffer_id ^= 1;
-	back_buffer_id = back_buffer_id^1;
+    // back_buffer_id ^= 1;
+    back_buffer_id = back_buffer_id ^ 1;
     fb = &frame_buffer[back_buffer_id];
-	
-
-	
   }
 
   /**
@@ -716,11 +709,11 @@ protected:
     clearFrameBuffer(0);
     brtCtrlOEv2(brightness, 0);
 
-    if (m_cfg.double_buff) {
+    if (m_cfg.double_buff)
+    {
 
       clearFrameBuffer(1);
       brtCtrlOEv2(brightness, 1);
-
     }
   }
 
@@ -777,7 +770,7 @@ private:
   /**
    * @brief - DP3246-family chips initialization routine
    */
-  void dp3246init(const HUB75_I2S_CFG& _cfg);
+  void dp3246init(const HUB75_I2S_CFG &_cfg);
 
   /**
    * @brief - reset OE bits in DMA buffer in a way to control brightness
@@ -841,7 +834,6 @@ protected:
   Bus_Parallel16 dma_bus;
 
 private:
-
   // Matrix i2s settings
   HUB75_I2S_CFG m_cfg;
 
@@ -855,9 +847,9 @@ private:
   frameStruct frame_buffer[2];
   frameStruct *fb; // What framebuffer we are writing pixel changes to? (pointer to either frame_buffer[0] or frame_buffer[1] basically ) used within updateMatrixDMABuffer(...)
 
-  volatile int back_buffer_id = 0;      // If using double buffer, which one is NOT active (ie. being displayed) to write too?
-  int brightness = 128;        // If you get ghosting... reduce brightness level. ((60/64)*255) seems to be the limit before ghosting on a 64 pixel wide physical panel for some panels.
-  int lsbMsbTransitionBit = 0; // For colour depth calculations
+  volatile int back_buffer_id = 0; // If using double buffer, which one is NOT active (ie. being displayed) to write too?
+  int brightness = 128;            // If you get ghosting... reduce brightness level. ((60/64)*255) seems to be the limit before ghosting on a 64 pixel wide physical panel for some panels.
+  int lsbMsbTransitionBit = 0;     // For colour depth calculations
 
   /* ESP32-HUB75-MatrixPanel-I2S-DMA functioning constants
    * we should not those once object instance initialized it's DMA structs