Update ili9341 init settings for get good gamma curve

Now colors gradient look perfect, so fix begin gradient color more darker

ili9341.c

@@ -283,12 +283,12 @@ static const uint8_t ili9341_init_seq[] = {
   // display off
   ILI9341_DISPLAY_OFF, 0,
   // Power control B
-  ILI9341_POWERB, 3, 0x00, 0x83, 0x30,
+  ILI9341_POWERB, 3, 0x00, 0xC1, 0x30,
   // Power on sequence control
   ILI9341_POWER_SEQ, 4, 0x64, 0x03, 0x12, 0x81,
   //ILI9341_POWER_SEQ, 4, 0x55, 0x01, 0x23, 0x01,
   // Driver timing control A
-  ILI9341_DTCA, 3, 0x85, 0x01, 0x79,
+  ILI9341_DTCA, 3, 0x85, 0x00, 0x78,
   //ILI9341_DTCA, 3, 0x84, 0x11, 0x7a,
   // Power control A
   ILI9341_POWERA, 5, 0x39, 0x2C, 0x00, 0x34, 0x02,
@@ -297,9 +297,9 @@ static const uint8_t ili9341_init_seq[] = {
   // Driver timing control B
   ILI9341_DTCB, 2, 0x00, 0x00,
   // POWER_CONTROL_1
-  ILI9341_POWER_CONTROL_1, 1, 0x26,
+  ILI9341_POWER_CONTROL_1, 1, 0x23,
   // POWER_CONTROL_2
-  ILI9341_POWER_CONTROL_2, 1, 0x11,
+  ILI9341_POWER_CONTROL_2, 1, 0x10,
   // VCOM_CONTROL_1
 //  ILI9341_VCOM_CONTROL_1, 2, 0x35, 0x3E,
   ILI9341_VCOM_CONTROL_1, 2, 0x3e, 0x28,
@@ -312,15 +312,15 @@ static const uint8_t ili9341_init_seq[] = {
   // COLMOD_PIXEL_FORMAT_SET : 16 bit pixel
   ILI9341_PIXEL_FORMAT_SET, 1, 0x55,
   // Frame Rate
-  ILI9341_FRAME_RATE_CONTROL_1, 2, 0x00, 0x1B,
+  ILI9341_FRAME_RATE_CONTROL_1, 2, 0x00, 0x18,
   // Gamma Function Disable
-  ILI9341_3GAMMA_EN, 1, 0x08,
+  ILI9341_3GAMMA_EN, 1, 0x00,
   // gamma set for curve 01/2/04/08
   ILI9341_GAMMA_SET, 1, 0x01,
   // positive gamma correction
-ILI9341_POSITIVE_GAMMA_CORRECTION, 15, 0x1F,  0x1A,  0x18,  0x0A,  0x0F,  0x06,  0x45,  0x87,  0x32,  0x0A,  0x07,  0x02,  0x07, 0x05,  0x00,
+ILI9341_POSITIVE_GAMMA_CORRECTION, 15, 0x0F,  0x31,  0x2B,  0x0C,  0x0E,  0x08,  0x4E,  0xF1,  0x37,  0x07,  0x10,  0x03,  0x0E, 0x09,  0x00,
   // negativ gamma correction
-ILI9341_NEGATIVE_GAMMA_CORRECTION, 15, 0x00,  0x25,  0x27,  0x05,  0x10,  0x09,  0x3A,  0x78,  0x4D,  0x05,  0x18,  0x0D,  0x38, 0x3A,  0x1F,
+ILI9341_NEGATIVE_GAMMA_CORRECTION, 15, 0x00,  0x0E,  0x14,  0x03,  0x11,  0x07,  0x31,  0xC1,  0x48,  0x08,  0x0F,  0x0C,  0x31, 0x36,  0x0F,
   // Column Address Set
 //ILI9341_COLUMN_ADDRESS_SET, 4, 0x00, 0x00, 0x01, 0x3f, // width 320
   // Page Address Set
@@ -328,7 +328,7 @@ ILI9341_NEGATIVE_GAMMA_CORRECTION, 15, 0x00,  0x25,  0x27,  0x05,  0x10,  0x09,
   // entry mode
   ILI9341_ENTRY_MODE_SET, 1, 0x06,
   // display function control
-  ILI9341_DISPLAY_FUNCTION_CONTROL, 4, 0x0A, 0x82, 0x27, 0x00,
+  ILI9341_DISPLAY_FUNCTION_CONTROL, 3, 0x08, 0x82, 0x27,
   // Interface Control (set WEMODE=0)
   ILI9341_INTERFACE_CONTROL, 3, 0x00, 0x00, 0x00,
   // control display

plot.c

@@ -1598,12 +1598,6 @@ draw_all_cells(bool flush_markmap)
     // clear map for next plotting
     clear_markmap();
   }
-//  START_PROFILE
-#ifdef __SCROLL__
-  if (waterfall)
-    update_waterfall();
-#endif
-//  STOP_PROFILE
 }
 
 void
@@ -1613,8 +1607,15 @@ draw_all(bool flush)
     force_set_markmap();
   if (redraw_request & REDRAW_MARKER)
     markmap_upperarea();
-  if (redraw_request & (REDRAW_CELLS | REDRAW_MARKER | REDRAW_AREA))
+  if (redraw_request & (REDRAW_CELLS | REDRAW_MARKER | REDRAW_AREA)){
     draw_all_cells(flush);
+#ifdef __SCROLL__
+  //  START_PROFILE
+    if (waterfall)
+      update_waterfall();
+  //  STOP_PROFILE
+#endif
+  }
   if (redraw_request & (REDRAW_CAL_STATUS | REDRAW_FREQUENCY) )
     draw_cal_status();                      // calculates the actual sweep time, must be before draw_frequencies
   if (redraw_request & REDRAW_FREQUENCY)
@@ -2219,7 +2220,7 @@ static void update_waterfall(void){
     uint16_t y = CELL_Y(index[i]); // should be always in range 0 - HEIGHT_SCROLL
     // Calculate gradient palette for range 0 .. 192
     // idx     r   g   b
-    //   0 - 192   0   0
+    //   0 - 127   0   0
     //  32 - 255 127   0
     //  64 - 255 255 127
     //  96 - 255 255 255
@@ -2227,8 +2228,8 @@ static void update_waterfall(void){
     // 160 -   0 127 255
     // 192 -   0   0 127
     // 224 -   0   0   0
-//    y = (uint8_t)i;  // for test
-         if (y <  32) color = RGB565( 192+((y-  0)*2),   0+((y-  0)*4),               0);
+    y = (uint8_t)i;  // for test
+         if (y <  32) color = RGB565( 127+((y-  0)*4),   0+((y-  0)*4),               0);
     else if (y <  64) color = RGB565(             255, 127+((y- 32)*4),   0+((y- 32)*4));
     else if (y <  96) color = RGB565(             255,             255, 127+((y- 64)*4));
     else if (y < 128) color = RGB565( 252-((y- 96)*4),             255,             255);