chore(blinky): Remove duplicate gamma correction

The new LEDs implementation already does gamma correction so it is
unnecessarily duplicated here now.  This commit also adds a short hello
message on the serial and sets the dim factor for the LEDs to a value
where the LED effect is more visible.

Signed-off-by: Rahix <rahix@rahix.de>

l0dables/blinky/main.c

 #include "epicardium.h"
 
 #include <math.h>
+#include <stdio.h>
 
 int levels[11]         = { 0 };
 int levels_display[11] = { 0 };
 
-// From https://learn.adafruit.com/led-tricks-gamma-correction/the-quick-fix
-const uint8_t gamma8[] = {
-	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
-	0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,
-	1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   1,   2,
-	2,   2,   2,   2,   2,   2,   2,   3,   3,   3,   3,   3,   3,   3,
-	4,   4,   4,   4,   4,   5,   5,   5,   5,   6,   6,   6,   6,   7,
-	7,   7,   7,   8,   8,   8,   9,   9,   9,   10,  10,  10,  11,  11,
-	11,  12,  12,  13,  13,  13,  14,  14,  15,  15,  16,  16,  17,  17,
-	18,  18,  19,  19,  20,  20,  21,  21,  22,  22,  23,  24,  24,  25,
-	25,  26,  27,  27,  28,  29,  29,  30,  31,  32,  32,  33,  34,  35,
-	35,  36,  37,  38,  39,  39,  40,  41,  42,  43,  44,  45,  46,  47,
-	48,  49,  50,  50,  51,  52,  54,  55,  56,  57,  58,  59,  60,  61,
-	62,  63,  64,  66,  67,  68,  69,  70,  72,  73,  74,  75,  77,  78,
-	79,  81,  82,  83,  85,  86,  87,  89,  90,  92,  93,  95,  96,  98,
-	99,  101, 102, 104, 105, 107, 109, 110, 112, 114, 115, 117, 119, 120,
-	122, 124, 126, 127, 129, 131, 133, 135, 137, 138, 140, 142, 144, 146,
-	148, 150, 152, 154, 156, 158, 160, 162, 164, 167, 169, 171, 173, 175,
-	177, 180, 182, 184, 186, 189, 191, 193, 196, 198, 200, 203, 205, 208,
-	210, 213, 215, 218, 220, 223, 225, 228, 231, 233, 236, 239, 241, 244,
-	247, 249, 252, 255
-};
-
 void fade()
 {
 	for (int i = 0; i < 11; i++) {
-		int level = gamma8[levels[i]];
+		int level = levels[i];
 		if (levels_display[i] > 0) {
 			epic_leds_set(i, level, 0, 0);
 			if (level == 0) {
@@ -49,6 +27,10 @@ void fade()
  */
 int main(void)
 {
+	printf("Hello from blinky!\n");
+
+	epic_leds_dim_top(6);
+
 	// l0dables are running on a separate, exclusive-to-l0dables core.
 	// Busy-waiting will not block the main operating system on core0 from
 	// running - but it will drain batteries.