Allow more better define waterfall_palette size and use

plot.c

@@ -2180,6 +2180,7 @@ redraw_frame(void)
   draw_cal_status();
 }
 
+//#define _USE_WATERFALL_PALETTE
 #ifdef  _USE_WATERFALL_PALETTE
 #include "waterfall.c"
 #endif
@@ -2194,11 +2195,12 @@ static void update_waterfall(void){
   index_t *index = trace_index[TRACE_ACTUAL];
   for (i=0; i< w_width; i++) {			// Add new topline
     uint16_t color;
-    uint16_t y = CELL_Y(index[i]); // should be always in range 0 - HEIGHT_SCROLL
 #ifdef _USE_WATERFALL_PALETTE
+    uint16_t y = _PALETTE_ALIGN(CELL_Y(index[i])); // should be always in range 0 - HEIGHT_SCROLL
 //    y = (uint8_t)i;  // for test
-    color = paltte[y];
+    color = waterfall_palette[y];
 #elif 0
+    uint16_t y = CELL_Y(index[i]); // should be always in range 0 - HEIGHT_SCROLL
     uint16_t ratio = (HEIGHT_SCROLL - y)*2;
 //    ratio = (i*2);    // Uncomment for testing the waterfall colors
     int16_t b = 255 - ratio;
@@ -2214,6 +2216,7 @@ static void update_waterfall(void){
     gamma_correct(b);
     color = RGB565(r, g, b);
 #else
+    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

waterfall.c

@@ -20,7 +20,8 @@
 // Test palette for waterfall
 // Possibly better use size = HEIGHT_SCROLL / 2 for more compact and allow use on different displays
 // And build table for every display size
-static const uint16_t palette[256] = {
+#define _PALETTE_ALIGN(idx)  ((idx)>>0)
+static const uint16_t waterfall_palette[] = {
 RGB565(0xBA,0x01,0x00),
 RGB565(0xBA,0x01,0x00),
 RGB565(0xB9,0x01,0x00),
@@ -277,5 +278,5 @@ RGB565(0x01,0x00,0x89),
 RGB565(0x01,0x00,0x8A),
 RGB565(0x00,0x00,0x87),
 RGB565(0x00,0x00,0x83),
-RGB565(0x00,0x00,0x84),
-};
+RGB565(0x00,0x00,0x84)
+};