try math

colors.S

@@ -1,5 +1,6 @@
 #include "colors.h"
 
+#define DIMM_FACTOR 3
   .section ".rodata","a"
 ;; color definitions according to
 ;; https://learn.sparkfun.com/tutorials/lilypad-protosnap-plus-activity-guide/3-custom-color-mixing
@@ -9,29 +10,29 @@ colors:
 off:
   .byte   0x00, 0x00, 0x00, 0
 blue:
-  .byte   0x00, 0x00, 0xff, 0
+  .byte   0x00>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0
 green:
-  .byte   0x00, 0xff, 0x00, 0
+  .byte   0x00>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0
 orange:
-  .byte   0xff, 0x80, 0x00, 0
+  .byte   0xff>>DIMM_FACTOR, 0x80>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0
 rose:
-  .byte   0xff, 0x00, 0x80, 0
+  .byte   0xff>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0x80>>DIMM_FACTOR, 0
 magenta:
-  .byte   0xff, 0x00, 0xff, 0
+  .byte   0xff>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0
 violet:
-  .byte   0x80, 0x00, 0xff, 0
+  .byte   0x80>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0
 azure:
-  .byte   0x00, 0x80, 0xff, 0
+  .byte   0x00>>DIMM_FACTOR, 0x80>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0
 cyan:
-  .byte   0x00, 0xff, 0xff, 0
+  .byte   0x00>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0
 springgreen:
-  .byte   0x00, 0xff, 0x80, 0
+  .byte   0x00>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0x80>>DIMM_FACTOR, 0
 chartreuse:
-  .byte   0x80, 0xff, 0x00, 0
+  .byte   0x80>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0
 yellow:
-  .byte   0xff, 0xff, 0x00, 0
+  .byte   0xff>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0
 white:
-  .byte   0xff, 0xff, 0xff, 0
+  .byte   0xff>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0xff>>DIMM_FACTOR, 0
 red:
-  .byte   0xff, 0x00, 0x00, 0
+  .byte   0xff>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0x00>>DIMM_FACTOR, 0
 

main.S

@@ -53,7 +53,7 @@
 
   .section ".data"
 screendata:
-  .rept 60
+  .rept 60 ;; number of leds in hardward
   .byte 0
   .endr
 screendataend:
@@ -164,7 +164,7 @@ forwardscreen:
   mov.w   data_forward_pointer, r10
   mov.b   #_off, @r10
   inc.w   r10
-  mov.b   #_green, @r10
+  mov.b   #_violet, @r10
   cmp.w   r10, r8
   jnz     forwardscreen_done
   mov.w   #screendata, r10

readme.md

@@ -61,3 +61,37 @@ During of loading data into six LEDs: 297us
 | 100       |                    | 5.9ms      |
 | 200       |                    | 11.8ms     |
 
+
+## Reset Circuitry
+
+It appears that the output voltage of the power supply raises that slow, that the MCU
+will not handle the reset correctly.
+
+The following circuitry should generate a valid reset signal far enough from the raise 
+of the supply voltage:
+
+![](./docs/reset-circuit.jpeg)
+
+The circuit generates the following signals:
+
+![](./docs/reset-signal.png)
+
+#### Reference voltage (green):
+
+```math
+U_ref = 3.3V \frac{22k\Omega}{22k\Omega + 10k\Omega} = 2.2V
+```  
+  
+
+#### Trigger voltage (purple):
+
+```math
+U_trigg = 3.3V \frac{330k\Omega}{330k\Omega + 82k\Omega} = 2.64V
+```  
+  
+
+#### RC constant:
+
+```math
+\tau = 82k\Omega \cdot 100nF = 8.2ms
+```